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Sample records for preoperative radiologic evaluation

  1. Preoperative evaluation

    International Nuclear Information System (INIS)

    Murphy, C.H.; Murphy, M.R.

    1987-01-01

    The value of a preoperative chest radiograph is twofold. The examination may reveal unsuspected pathology that would alter the approach to surgery of anesthesia. Secondly, it provides a baseline or reference from which to evaluate subsequent post-operative films. The percentage of detection of unsuspected pathology on preoperative chest radiographs has been shown to be exceedingly small in certain patient populations. The authors do not recommend routine use of preoperative chest radiographs in children or in adults under the age of 40 who do not smoke, unless (1) the surgical disease has chest manifestations; (2) there is historic or clinical evidence of a coexisting disease with chest involvement; or (3) there is a likelihood that post-operative management will require follow-up films

  2. Preoperative radiological approach for hilar lung cancer

    International Nuclear Information System (INIS)

    Ohno, Yoshiharu; Higashino, Takanori; Watanabe, Hirokazu; Yoshimura, Masahiro; Sugimura, Kazuro

    2003-01-01

    Recent advances in CT, MR, and nuclear medicine have made it possible to evaluate morphological and functional information in hilar lung cancer patients more accurately and quantitatively. In this review, we describe recent advances in the radiological approach to hilar lung cancer, focusing on mediastinal invasion, lymph node metastasis, and pulmonary functional imaging. We believe that further basic studies as well as clinical applications of newer MR techniques will play an important role in the management of patients with lung cancer. (author)

  3. Reference radiology in nephroblastoma: accuracy and relevance for preoperative chemotherapy

    International Nuclear Information System (INIS)

    Schenk, J.P.; Schrader, C.; Zieger, B.; Ley, S.; Troeger, J.; Furtwaengler, R.; Graf, N.; Leuschner, I.

    2006-01-01

    Purpose: A reference radiologic diagnosis was carried out for the purpose of quality control and in order to achieve high diagnostic accuracy in the ongoing trial and study SIOP 2001/GPOH for renal tumors during childhood. The aim of the present study is to evaluate the value of diagnostic imaging and the benefit of reference evaluation at a pediatric radiology center. Materials and Methods: In 2004 the imaging studies of 97 patients suspected of having a renal tumor were presented at the beginning of therapy. Diagnostic imaging was compared to the primary imaging results and the histological findings and was analyzed in regard to the therapeutic consequence (primary chemotherapy without prior histology). 77 MRI, 35 CT and 67 ultrasound examinations of 47 girls and 50 boys (mean age 4 years; one day to 15.87 years old) were analyzed. In addition to the histological findings, the reference pathological results were submitted in 86 cases. Results from the primary imaging corresponding to the histology and results from the reference radiology corresponding to the histology and results from the reference radiology corresponding to the histology were statistically compared in a binomial test. Results: In 76 of the reference-diagnosed Wilms' tumors, 67 were confirmed histologically. In 72 cases preoperative chemotherapy was initiated. In 5 cases neither a Wilms' tumor nor a nephroblastomatosis was found. 16 of 21 cases (76%) with reference-diagnosed non-Wilms' tumors were selected correctly. The results of the primary imaging corresponded to the histology in 71 cases, and those of the reference radiology in 82 cases. The statistical evaluation showed that the results of the reference radiology were significantly better (p=0.03971). (orig.)

  4. Radiological evaluation of dysphagia

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    Ott, D.J.; Gelfand, D.W.; Wu, W.C.; Chen, Y.M.

    1986-11-21

    Dysphagia is a common complaint in patients presenting for radiological or endoscopic examination of the esophagus and is usually due to functional or structural abnormalities of the esophageal body or esophagogastric region. The authors review the radiological evaluation of the esophagus and esophagogastric region in patients with esophageal dysphagia and discuss the roentgenographic techniques used, radiological efficacy for common structural disorders, and evaluation of esophageal motor function. Comparison is made with endoscopy in assessing dysphagia, with the conclusion that the radiological examination be used initially in patients with this complaint.

  5. Radiological evaluation of dysphagia

    International Nuclear Information System (INIS)

    Ott, D.J.; Gelfand, D.W.; Wu, W.C.; Chen, Y.M.

    1986-01-01

    Dysphagia is a common complaint in patients presenting for radiological or endoscopic examination of the esophagus and is usually due to functional or structural abnormalities of the esophageal body or esophagogastric region. The authors review the radiological evaluation of the esophagus and esophagogastric region in patients with esophageal dysphagia and discuss the roentgenographic techniques used, radiological efficacy for common structural disorders, and evaluation of esophageal motor function. Comparison is made with endoscopy in assessing dysphagia, with the conclusion that the radiological examination be used initially in patients with this complaint

  6. Pre-operative evaluation for thorax surgery

    International Nuclear Information System (INIS)

    Silva Luis, Saenz; Morales, Oscar Alberto

    2002-01-01

    A pre-operative analysis of the function of the breathing system is made in the patient that will be taken to thorax surgery. The paper includes risk factors, pre-operative clinical evaluation and of breathing and cardiovascular system

  7. Preoperative radiological assessment of children with pectus excavatum

    International Nuclear Information System (INIS)

    Kilda, A.; Barauskas, V.; Basevicius, A.; Lukosevicius, S.

    2005-01-01

    Objective: The degree of the pediatric chest deformation that should be subjected to corrective surgical treatment or conservative treatment remains poorly defined as recognized. In the present study, using preoperative and postoperative radiological examination data, we aim to assess what degree of chest wall deformation changes statistically reliably after surgery. Materials and methods: Radiological chest examinations were performed for 88 children before and after remedial operations. Chest X-ray and CT scans were done to measure transversal chest width; sagittal left chest side depth, sagittal right chest side depth, sternovertebral distance, and vertebral body length. Derivative indices were also estimated: the Vertebral Index, the Frontosagittal Index, the Haller index, and the asymmetry index. Computerized assessment of data was used. For statistical analysis, the software 'STATISTICA 6.0' was used. Results: Postoperatively, the Vertebral Index increased approximately by 2.37±2.72; the Frontosagittal Index decreased by 4.60±4.34, and the Haller index value increased approximately up by 0.45±0.49. Statistically reliable deformation index difference before and after surgery was not detected when the Vertebral Index was below 26.2, p=0.08; the Frontosagittal Index was above 32.9, p=0.079; and the Haller Index was less than 3.12, p=0.098. Conclusions: Preoperative CT scanning, coupled with assessment of the chest wall shape and the deformation degree, would be necessary for pediatric patients. The following deformation indices are indications for surgical treatment: VI > 26, FSI 3.1. (author)

  8. Preoperative patient education: evaluating postoperative patient outcomes.

    Science.gov (United States)

    Meeker, B J

    1994-04-01

    Preoperative teaching is an important part of patient care and can prevent complications, as well as promote patient fulfillment during hospitalization. A study was conducted at Alton Ochsner Medical Foundation in New Orleans, LA, in 1989, to determine the impact of a preoperative teaching program on the incidence of postoperative atelectasis and patient satisfaction. Results showed no significant difference of postoperative complications and patient gratification after participating in a structured preoperative teaching program. As part of this study, it was identified that a patient evaluation tool for a preoperative teaching class needed to be developed. The phases of this process are explained in the following article.

  9. The value of preoperative ultrasound guided fine-needle aspiration cytology of radiologically suspicious axillary lymph nodes in breast cancer

    Directory of Open Access Journals (Sweden)

    Torill Sauer

    2014-01-01

    Full Text Available Background: Preoperative ultrasound (US and eventually US-guided fine-needle aspiration cytology (FNAC of suspicious axillary lymph nodes (ALN is a standard procedure in the work-up of suspicious breast lesions. Preoperative US FNAC may prevent sentinel node biopsy (SNB procedure in 24-30% of patients with early stage breast carcinoma. The aim of this study was to evaluate the institutional results of this preoperative diagnostic procedure. Materials and Methods: A total of 182 cases of preoperative FNAC of suspicious ALN where retrieved from the pathology files. The results were compared with the final histology and staging. False negative (FN FNAC cases were reviewed and possibly missed metastatic cases (2 were immunostained with the epithelial marker AE1/AE3. Results: There were no false positives, whereas 16 cases were FN. In all but one case the FN′s represented sampling error. Half of the 16 FN cases in this series were macrometastases. Discussion: About 83% of the preoperatively aspirated cases were N+, indicating that a radiologically suspicious ALN has a very high risk of being metastatic. Preoperative US guided FNAC from radiologically suspicious ALN is highly efficient in detecting metastases. Depending on national guidelines, a preoperative, positive ALN FNAC might help to stratify the patients as to SNB and/or ALN dissection.

  10. A comparison of radiological and historical findings in osteosarcomas following pre-operative chemotherapy

    International Nuclear Information System (INIS)

    Sommer, H.J.; Riebel, T.; Winkler, K.; Heise, U.; Delling, G.; Hamburg Univ.; Hamburg Univ.

    1985-01-01

    Since the introduction of pre-operative chemotherapy, osteosarcomas have shown a more favourable prognosis. Reaction of the tumour due to chemotherapy is judged pre-operative primarily by radiology (plain films, angiography, CT, scintigraphy). There is little evidence concerning the radiological appearances after pre-operative chemotherapy and morphological changes, particularly in respect of tumour regression. Specific radiological changes were therefore compared with pathological findings following chemotherapy and operation in 17 patients with osteosarcomas. Tumours were examined which showed radiological evidence of intra- and extra-osseous sclerosis or lysis and which still were classified as vital tumour tissue. Tumour planes were reconstructed from large histological sections of the operative specimen and compared with the radiological appearances. Sclerosis was found to be due to reactive new bone formation or to mineralisation of the osteosarcomatous tissue. Lysis correlated with persistent vital tumour, or in connective tissue. Nine out of ten cases, regarded as vital on radiological evidence, showed vital tumour cells on histological section. Lyses and scleroses were not reliable indications of the pre-operative state of the osteosarcoma following chemotherapy. On the other hand, combined qualitative radiological criteria for assesing tumour vitality, proved to be helpful. (orig.) [de

  11. Proposed radiological criteria for pre-operative determination of resectability in peritoneal-based malignancies

    International Nuclear Information System (INIS)

    Tan, Grace Hwei Ching; Chanyaputhipong, Jendana; Teo, Melissa Ching Ching; Kwek, Jin Wei; Hosseini, Reza; Tham, Chee Kian; Soo, Khee Chee

    2016-01-01

    The selection of patients for cytoreductive surgery (CRS) and hyperthermic intra-peritoneal chemotherapy infusion (HIPEC) is important, and relies heavily on imaging. However, it has been reported that Computer Tomographic (CT) scans may only achieve a low sensitivity of 33% for peritoneal disease. We propose a set of radiological criteria for pre-operative determination of resectability of peritoneal disease in peritoneal-based malignancies and validate this in our cohort of patients. A retrospective review of all patients who underwent laparotomy with a view for CRS and HIPEC, at the National Cancer Centre Singapore from January 2000 to April 2010, was performed. Intra-operative Peritoneal Cancer Index (PCI) scores were recorded. The pre-operative imaging was reviewed with a senior radiologist who was blinded, and recorded the radiological PCI scores (CT-PCI) and eight additional CT prognostic factors (CT-PF). The CT-PCI and CT-PF scores were then compared with the intra-operative findings to determine the radiological accuracy. The scores and the individual prognostic factors were then evaluated for their predictive ability for unresectability. Comparison of the CT-PCI and PCI scores showed a concordance correlation coefficient at 0.52 (95% CI 0.34–0.7). Accuracy was increased with the addition CT-PF. The presence of omental caking and ascites were predictors of unresectability. We propose a scoring system which is able to predict for unresectable disease with a specificity of 80% and a sensitivity of 62%. With our proposed criteria, and scoring system, the selection of patients for CRS and HIPEC can be improved, and unnecessary exploratory operations avoided.

  12. Evaluation of preoperative embolization of meningioma

    International Nuclear Information System (INIS)

    Park, Sung Tae; Suh, Dae Chul; Lee, Ho Kyu; Choi, Choong Gon; Lee, Myung Jun; Ji, Eun Kyung; Shin, Byung Suck; Kim, Chang Jin; Kim, Jong Uk; Whang, C. Jin

    1998-01-01

    To evaluate the efficacy and safety of preoperative embolization of intrancranial meningioma.Materials and Methods : We retrospectively reviewed intrancranial meningioma patients (n=37) who underwent preoperative embolization. They were categorized into two groups, skull base lesions (n=22) and non-skull base lesions (n=15), according to tumor location. In addition, embolization results were classified by comparison between pre- and post-embolization angiography as complete (residual tumor staining 10 or 30%). In each group, estimated blood loss (EBL) was estimated by amount of intraoperative transfusion with pre- and post-operative hemoglobin level. Tumor resectability was evaluated by follow-up computed tomography. New symptoms occurring within 24 hours of embolization were considered to be those associated with embolization ; symptoms improved by conservative treatment were regarded as mild, while those resulting in new deficits were considered severe. Results : In the group with skull base lesions (n=22), complete embolization with the criteria of residual tumor staining of less than 30% was performed in 14 patients(EBL=1770ml;complete surgical removal in nine patients and incomplete removal four). Incomplete embolization was performed in eight patients (EBL=3210ml; complete and incomplete removal each in four patients). In the group with non-skull base lesions, complete embolization with the criteria of residual tumor staining of less than 10% was performed in five patients (EBL=970ml) and incomplete embolization in ten (EBL=2260ml). Complete tumor removal was possible in this group regardless of the completeness of preoperative tumor embolization. In a case of intraventricular meningioma (3%), intratumoral hemorrhage occurred on the day following embolization. Other mild post-embolization complications occurred in three cases (8%). Conclusion : Preoperative embolization can be an effective and safe procedure for meningioma and may reduce intraoperative blood

  13. Radiological evaluation of chondroblastoma

    Energy Technology Data Exchange (ETDEWEB)

    Hudson, T.M.; Hawkins, I.F. Jr.

    1981-04-01

    Eleven new and six recurrent chondroblastomas were studied with multiple radiological imaging methods (plain radiography, conventional tomography, computed tomography, radionuclide bone scanning, and angiography). When the plain radiographic appearance was typical, conventional tomography or computed tomography (CT) was helpful, but other studies were not. Periosteal reaction and angiographic hypervascularity were common and did not indicate cortical breakthrough. For large, aggressive, or atypical lesions, conventional tomography and CT were helpful in delineating anatomic extent, and angiography was of value in demonstrating major vessel displacement. Radionuclide bone scanning was not useful.

  14. The preoperative imaging evaluation for cochlear implantation

    International Nuclear Information System (INIS)

    Liu Zhonglin; Wang Zhenchang; Fu Lin; Li Yong; Xian Junfang; Yang Bentao; Lan Baosen; Li Yongxin; Zheng Jun; Song Yan; Liu Bo; Chen Xueqing; He Haili

    2006-01-01

    Objective: To analyze CT and MRI findings of temporal bone and to evaluate preoperative diagnostic value for cochlear implantation. Methods: One hundred and sixty candidates for cochlear implantation were examined with axial CT scan, 64 of them also with coronal CT scan, and 119 patients with MRI. Results: All of 320 ears were well-aerated, and 206 ears had mastoid cavities extended posteriorly to the sigmoid sinus. The length from posterior-lateral tympanic wall to the outer cortex was (2.34±0.42) mm (left side) and (2.25±0.40) mm (right side) (U=1.887, P 1 and T 2 signal on MRI. The congenital malformations of inner ear occurred in 67 ears, including complete dysplasia in 1 ear, cochlear hypodysplasia in 6 ears, Mondini deformation in 5 ears, enlarged vestibular aqueduct in 40 ears, dysplastic semicircular canal and the vestibulae in 10 ears, and narrowing of internal auditory canal in 5 ears. Conclusion: Preoperative imaging examinations can provide critical information to ensure successful cochlear' implantation. (authors)

  15. Preoperative evaluation of locally spreaded pelvic tumors

    International Nuclear Information System (INIS)

    Baramia, M.; Todua, F.; Gotsadze, D.; Khutulashvili, N.; Lashkhi, K.; Nadareishvili, A.

    1998-01-01

    Am of the study: preoperative evaluation of patients with locally advanced pelvic tumors subjected to pelvic exenteration. Determine operability to avoid explorative laparatomies, which cause serious complications in these patients. Evaluate condition of urinary system in case of this pathology. Materials and methods: 34 patients with locally advanced pelvic tumors where pelvic exenteration was attempted were studied. Along with other methods of diagnostic CT and MRI were performed. Results: In all patients secondary involvement of the urinary bladder was noted. In 30 patients CT and MR findings were confirmed (88,2%) intraoperatively and different types of pelvic organs exenteration were performed. In 1 case spread of tomoruos infiltrate to the pelvic wall and common iliac vessels was detected intraoperatively (patient had history of radiation therapy). In 2 cases carcinomatosis of the peritoneum was found. In 1 case involvement of urinary bladder was simulated by close attachment of enlarged uterus. Conclusion: Obtained results show, that CT and MR are highly informative methods of disease spread evaluation and thus determining operability. Radiotherapy performed prior to operation sets difficulties in differentiation for tumourous infiltrate and post-radiotherapy changes in pelvis. (Full text)

  16. Radiologic evaluation of os odontoideum

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    Lee, Eun Ju; Chung, Tae Sub; Suh, Jung Ho; Kim, Dong Ik; Kim, Yong Soo; Park, Hyoung Chun; Oh, Soung Hoon [Yonsei University College of Medicine, Seoul (Korea, Republic of)

    1988-10-15

    We took an analysis on the clinical and radiologic findings of os odontoideum, which had been regarded as relatively uncommon disease, on 5 patients whom we have recently experienced. Our results were as follows: 1. Os odontoideums were incidentally discovered during the radiologic evaluation of traumatised 4 cases, who had been well being. Another one case of os odontoideum was associated with multiple epiphyseal dysplasia. 2. General radiologic findings of os odontoideum were a round or oval and hypoplastic ossicle separated from the base of odontoid process by wise gap. 3. Alanto-Axial instability was developed in 5 cases of os odontoideum by flexion and extension stress view of lateral cervical spine. 4. Flexion views of lateral cervical spine showed narrowing of anteroposterior diameter of spinal canal which were available at atlantoaxial level on 5 cases of os odontoidum. 5. CT myelogram and cervical myelogram showed anteriorly compressed dural sac and deformed spinal cord by body of axis at the atlanto-axial level.

  17. The preoperative evaluation prevent the postoperative complications of thyroidectomy

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    Chien-Feng Huang

    2015-03-01

    Conclusions: The success of thyroid surgery depends on careful preoperative planning, including a preoperative neck ultrasound to determine the proximity of the nodule to the recurrent laryngeal nerve course, and the consideration of the type of anesthesia, adjuvant devices for intra-op monitoring of the RLN, and surgical modalities. Our results suggest that preoperative evaluation implementations are positively associated with strategy of surgery and postoperative hypocalcemia prevention.

  18. Radiological anatomy - evaluation of integrative education in radiology.

    Science.gov (United States)

    Dettmer, S; Schmiedl, A; Meyer, S; Giesemann, A; Pabst, R; Weidemann, J; Wacker, F K; Kirchhoff, T

    2013-09-01

    Evaluation and analysis of the integrative course "Radiological Anatomy" established since 2007 at the Medical School Hannover (MHH) in comparison with conventional education. Anatomy and radiology are usually taught separately with a considerable time lag. Interdisciplinary teaching of these associated subjects seems logical for several reasons. Therefore, the integrative course "Radiological Anatomy" was established in the second year of medical education, combining these two closely related subjects. This interdisciplinary course was retrospectively evaluated by consideration of a student questionnaire and staff observations. The advantages and disadvantages of integrative teaching in medical education are discussed. The course ratings were excellent (median 1; mean 1.3 on a scale of 1 to 6). This is significantly (p radiology increased during the course (88 %). According to the students' suggestions the course was enhanced by a visitation in the Department of Radiology and the additional topic central nervous system. Integrative teaching of anatomy and radiology was well received by the students. Both, anatomical and radiological comprehension and the motivation to learn were improved. However, it should be considered, that the amount of work and time required by the teaching staff is considerably increased compared to traditional teaching. © Georg Thieme Verlag KG Stuttgart · New York.

  19. Preoperative evaluation : risk management and implementation aspects

    NARCIS (Netherlands)

    Klei, W.A. van

    2002-01-01

    In preoperative risk management the anesthesiologist uses diagnostic information to estimate the probability of outcomes and to decide on the anesthetic strategy in a particular patient. The aim of this thesis was explore to what extent simple patient characteristics, particularly obtained from

  20. Radiologic evaluation of colorectal cancer

    International Nuclear Information System (INIS)

    Lee, Young Joong; Kang, Hee Tae; Kim, Jong Deok; Rhee, Hak Song

    1984-01-01

    The incidence of colorectal cancer of Korea is much lower than that of Western countries, but has shown a tendency to a slight increase recently. Barium enema is the most valuable, noninvasive and inexpensive method available to evaluate the size, shape and site of colorectal cancer. The authors reviewed and radiologically classified barium enema studies of 232 cases of colorectal cancer from Aug. 1967 to July 1982 at Presbyterian Medical Center, Jeonju, Confirmed clinically, operatively and pathologically. The results were as follows; 1. The ratio of male and female was 1.3:1, and youngest was 13 year-old and the oldest 86 year-old. 2. The peak incidence occurred from 5th to 7th decades, accounting for 78% of all cases (181/232), and there was a relatively high incidence of the disease in patients below 30 years of age at 7.8% (18/232). 3. Rectum and rectosigmoid region are the most frequently involved regions (127/232:54.8%). 4. The positivity of barium enema examination was 4.0% (232/5807), and its accuracy was 96.5% (224/232). 5. The radiologic findings were classified into 4 groups, and they were annular encircling 62.9% (146/232). polypoid fungating 26.8% (62/232), infiltrating 8.6% (20/232), and primary ulcerating 1.7% (4/232) in order of frequency. 6. The linear length of the cancer ranged from 1.5 Cm to 15 Cm, and the average length was 5.5 Cm. 7. There was no statistical correlation between the length of lesion, the site, and the radiologic findings, and stages of the lesion (P:0.750-0.250). 8. The majority of colorectal cancers was adenocarcinoma (217/232:93.6%)

  1. Evaluating the effect of preoperative oral gabapentin on ...

    African Journals Online (AJOL)

    Evaluating the effect of preoperative oral gabapentin on postoperative pain in patients receiving spinal ... Southern African Journal of Anaesthesia and Analgesia ... Group III (n = 30) patients received an oral placebo one hour prior to surgery.

  2. An audit of documented preoperative evaluation of surgery patients ...

    African Journals Online (AJOL)

    Southern African Journal of Anaesthesia and Analgesia 2015; 21(4):23-28 ... Background:The anaesthetic preoperative evaluation of a patient is the clinical foundation of perioperative patient .... suggested a need for further investigation.

  3. Radiological evaluation of the response to chemotherapy for osteosarcoma

    International Nuclear Information System (INIS)

    Miwa, Shinji; Taki, Junichi; Yamamoto, Norio

    2011-01-01

    Sixty-one patients with osteosarcoma were examined by radiographs, angiograms, MRI, 201 Tl and 99m Tc-methoxyisobutyl-isonitrile (MIBI) scintigram to evaluate their response to preoperative chemotherapy. All patients were classified as either responders or non-responder according based on the imaging findings. The radiographs were evaluated according to the degree of sclerotic change and cortical recovery, and the angiograms were evaluated according to the degree of vascular change. MR images were evaluated according to the rate of extraskeletal mass reduction. The 201 Tl and 99m Tc-MIBI scans were evaluated by the percentage reduction of the uptake ratio. All patients were evaluated on the basis of a pathological examination of the resected specimens. We also devised a combined radiological scoring system according to the predictive power of each type of diagnostic image and investigated the correlation between the radiological evaluation and the pathological evaluation. Sensitivity, specificity, and accuracy were 81.0%, 19.0%, and 60.3%, respectively for the radiographs; 77.1%, 20.0%, and 60.0%, respectively, for angiograms; 82.1%, 69.0%, and 75.4%, respectively for MRI; 81.5%, 68.0%, and 75.0%, respectively, for 201 Tl scans; 76.7%, 70.6%, and 74.5% for 99m Tc-MIBI scans; and 88.9%, 84.0%, and 86.9%, respectively, for the combined radiological evaluation. (author)

  4. Radiologic techniques in evaluation endocrine disorders

    International Nuclear Information System (INIS)

    Martino, C.R.; Schultz, C.L.; Butler, H.E.; Haaga, J.R.

    1988-01-01

    This paper discusses evaluation of normal and diseased endocrine organs that has been facilitated by the development of new radiologic-imaging techniques including nuclear medicine, ultrasound, computed tomography, and magnetic resonance imaging. With improvement in resolution and tissue contrast, abnormalities as small as 5 mm can now be imaged with these modalities. Endocrinologists and clinicians involved in the evaluation and diagnosis of patients with endocrine diseases can be substantially aided by a proper radiologic workup. The authors describe and illustrate various radiologic techniques that are useful for evaluating thyroid and parathyroid derangements

  5. Preoperative CT evaluation on nasal cavity for transsphenoidal approach

    International Nuclear Information System (INIS)

    Saeki, Naokatsu; Yamaura, Akira; Hoshi, Seiichiro; Sunada, Souichi; Sunami, Kenro

    1997-01-01

    Preoperative bone CT scans sliced parallel to the surgical plane were evaluated in 32 cases of transsphenoidal surgery. This method predicted patients with narrow nasal cavity, and helped to determine the rhinological maneuvers for providing a wider operative field. In addition, it helps to plan the need and extent of sella floor removal in re-operated cases. There was relatively little difference in the width and length of the nasal cavity between acromegalic and non-acromegalic patients. Hence, bone CT scans are useful in the preoperative evaluation of patients undergoing transsphenoidal surgery. (author)

  6. Assessment of patient satisfaction with the preoperative anesthetic evaluation

    Directory of Open Access Journals (Sweden)

    Gebremedhn EG

    2014-09-01

    Full Text Available Endale Gebreegziabher Gebremedhn, Vidhya Nagaratnam Department of Anesthesia, School of Medicine, Gondar College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia Background: The evaluation of patient satisfaction is a core aspect of the continuous quality improvement in anesthesia service that can be affected by the preoperative anesthetist visit. This visit enables the anesthetist to know about the patient's general health status and the nature of surgery, to choose the type of anesthesia, and to discuss perioperative complications and their management with the patient. Patients have sometimes complained about the information given during the preoperative anesthetic evaluation in the University of Gondar teaching and referral hospital. The aim of this study was to determine the level of patient satisfaction with the preoperative anesthetist visit. Methods: A cross-sectional study was conducted from February 15 to April 15, 2013. All consecutive elective patients who were operated upon under anesthesia during the study period were interviewed 24 hours after operation. A pretested questionnaire and checklists, which were developed based on the hospital's anesthetic evaluation sheet, were used for data collection. Results: A total of 116 elective patients were operated upon under anesthesia during the study period. Of these, 102 patients were included in our study, with a response rate of 87.9%. Anesthetists introduced themselves to ~24% patients; provided information about anesthesia to ~32%, postoperative complications to ~21%, postoperative analgesia to ~18, and postoperative nausea and vomiting to ~21%; and spent adequate time with ~74%. Patients' questions were answered by the anesthetist in ~65% of cases, and ~65% of patients had reduced anxiety after the anesthetist visit. The patients' overall satisfaction with the preoperative anesthetist visit was ~65%. Conclusion and recommendation: Patient satisfaction with the

  7. Urogenital system diseases's radiological evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Bianchi, S; Mecozzi, B

    1985-01-01

    Radiological urogenital radiography reliability, can be compromised because of absence of a correct urodynamic diagnosis. It is then required that specialist radiologists know the problems concerning the urogenital system radiographies cannot be made in many cases, because of the scarcity in hospitals of idoneous urodynamic services.

  8. Report on the pre-operational environmental radiological and micrometeorological studies around Kaiga Atomic Power Project site

    International Nuclear Information System (INIS)

    1999-08-01

    This report presents a summary of the results of preoperational environmental radiological and micro- meteorological studies carried out during the year 1992, 1993, 1995, 1998 and 1999. Baseline radioactivity levels in Kaiga environment originating from 137 Cs, 90 Sr and natural radionuclides are given. Micro-meteorological data includes that from SODAR, tower and surface instruments. The data is compared with that observed at other NPP Sites in the country. (author)

  9. Radiological evaluation of familial osteopetrosis

    International Nuclear Information System (INIS)

    Moon, Moo Chang; Kang, Shin Wha; Won, Jong Jin; Rhee, Song Joo; Choi, Ki Chul

    1980-01-01

    Authors found 16 patients with benign osteopetrosis out of 62 members of 4 families and analysed these patients clinically, radiologically, hematologically and biochemically at the Department of Radiology, Jeonbug National University Hospital from October 1977 to June 1980. The results are as follows; 1. We obtained that there is evidence of familial tendency in developing osteopetrosis because of the fact that 15 patients (94%) developed in 3 families and more than 2 patients in each family. In genetical point of view we suspected dominant trait of inheritance and could rule out recessive trait because patients were found in successive generations except for one family. There were no consangulneous marriages among the parents of these patients. 2. The majority of patients were adolescent or adult above 10 years of age when the disease was diagnosed. The incidence was identical in both sex. 3. No clinical symptoms and historical abnormalities were found in 11 patients (69%) and 5 patients (31%) showed only mild symptoms. Among 5 patients with clinical symptoms 3 patients showed pathologic fractures. In all 3 patients, fractures occurred only by mild trauma and affected sites were tubular bones and they were transverse type. 4. There were no specific relationship between ABO types and Rh reactions in developing osteopetrosis and no specific findings in hematological, biochemical and routine urinalysis. 5. The only diagnostic finding in most patients were the typical and specific radiological findings

  10. Patient exposure evaluation in Romanian radiological departments

    International Nuclear Information System (INIS)

    Girjoaba, O.; Cucu, A.

    2012-01-01

    Purpose: A nation-wide evaluation of ionizing radiation exposure of the Romanian population due to the radiological examinations is performed in accordance with European Directive 97/43 EURATOM implemented in national regulations. Method: The study is applied to the collected data from radiological departments from Romanian hospitals during 2010. The radiological examinations were grouped in three categories: conventional diagnostic radiology, interventional radiology and computed tomography. The annual collective dose was determined from the reported data about the mean effective doses and the frequency for each type of radiological examination, in conformity with the national regulations. Regarding the frequency aspects, the results include the age and gender distributions. Major results: More then 6 million radiological examinations were performed in 2010, Romania having a population about of 20.3 million inhabitants. The collective effective dose for 2010 resulted from the study is 152 mSv per 1000 inhabitants. Conclusions: Medical practitioners must select the best medical imaging investigation for each clinical case taking into account the importance of keeping the patient dose as low as possible. Medical physicists should be strongly involved in the establishing of the dosimetry procedures. (author)

  11. Decision Strategy: Radiological Evaluations: Air

    Energy Technology Data Exchange (ETDEWEB)

    Sohier, A

    2000-07-01

    The objectives of SCK-CEN's R and D programme on off-site emergency management are (1) to improve methods to assess in real time the radiological impact to the population and the environment during a nuclear emergency; (2) to support and advise the Belgian authorities on specific problems concerning existing and potential hazards from exposure to ionising radiation in normal and accidental conditions; (3) to organise training courses on off-site emergency response to nuclear accidents. Main achievements in 1999 are reported on.

  12. Decision Strategy: Radiological Evaluations: Air

    International Nuclear Information System (INIS)

    Sohier, A.

    2000-01-01

    The objectives of SCK-CEN's R and D programme on off-site emergency management are (1) to improve methods to assess in real time the radiological impact to the population and the environment during a nuclear emergency; (2) to support and advise the Belgian authorities on specific problems concerning existing and potential hazards from exposure to ionising radiation in normal and accidental conditions; (3) to organise training courses on off-site emergency response to nuclear accidents. Main achievements in 1999 are reported on

  13. Radiological evaluation of spontaneous pneumoperitoneum

    International Nuclear Information System (INIS)

    Kim, H. S.; Kim, J. D.; Rhee, H. S.

    1982-01-01

    112 cases of spontaneous penumoperitoneum, the causes of which were confirmed by clinical and surgical procedure at Presbyterian Medical Center from January, 1977 to July, 1981 were reviewed radiologically. The results were as follows: 1. Perforation of duodenal ulcer (46/112: 41.1%), stomach ulcer (22/112: 19.6%), and stomach cancer (11/112: 9.8%) were the three most common causes of spontaneous penumoperitoneum. These were 70.5% of all causes. 2. The most common site of free gas was both subdiaphragmatic areas (46: 41.1%). Others were Rt. subdiaphragmatic only (31: 27.7%), both subdiaphragmatic with subhepatic (16: 14.3%), Rt. subdiaphragmatic with subhepatic (7: 6.2%), Rt. subdiaphragmatic only (5: 4.4%), diffuse in abdomen (4: 3.6%), and subhepatic only (3: 2.7%). So 92.0% (103/112) were located in RUQ. 3. The radiological shape of free gas was classified: crescent (52: 46.4%) of small amount; half-moon (21: 18.8%) of moderate amount; large or diffuse (39: 34.8%) of large amount.4. The age between 31 and 60 occupied 69.1% (77/112), and male was predominant (5.2 times). 5. The patient's position showing free air most frequently was erect

  14. Pleural ultrasound as an adjunct to physical examination in the preoperative evaluation of lung cancer patients.

    Science.gov (United States)

    Bah, Ismaël; Goudie, Eric; Khereba, Mohamed; Ferraro, Pasquale; Duranceau, André; Martin, Jocelyne; Thiffault, Vicky; Liberman, Moishe

    2014-05-01

    Preoperative evaluation of patients with suspected or confirmed lung cancer consists of clinical and radiological staging. Malignant pleural effusion is a poor prognosticator in non-small-cell lung cancer. Pleural ultrasound (PU) allows for the assessment of pleural effusion, providing real-time guidance for its aspiration and cytological analysis. Pleural Ultrasonography in Lung Cancer (PULC) as an adjunct to physical examination has the potential to improve preoperative staging of non-small-cell lung cancer during first surgical encounter by allowing the evaluation of previously unassessed pleural effusion. This study consisted of a prospective trial of surgeon-performed PU in the preoperative evaluation of lung cancer patients. All patients evaluated in the thoracic surgery clinic with the new or presumed diagnosis of lung cancer were eligible. A portable ultrasound machine was used to evaluate pleural fluid in the bilateral costophrenic sulci with pleural fluid aspiration for cytological analysis. Forty-five patients were prospectively enrolled over a 3-month period. Thirteen patients had ultrasound evidence of a pleural effusion, of which 3 were significant enough for aspiration. Cytological analysis of these effusions yielded malignant cells in 1 patient. Positive PULC evaluation led to a change in clinical staging (M0 to M1a) in 10 patients and a change in pathological staging (pleural fluid cytology positive) in 1 patient. The time required for PULC examination was 15 ± 7 min. There were no complications related to the procedures. Preoperative pleural ultrasonography is a rapid and effective way to improve precision of staging in patients with lung cancer. More precise staging may allow for more appropriate testing, patient prognostication and operative planning.

  15. Evaluation of radiological detriment from negative radiological examinations

    International Nuclear Information System (INIS)

    Frometa Suarez, I.; Jerez Vergueria, S.F.

    1997-01-01

    The individul doses of radiation due to diagnostic radiology are usually low, though their contribution to the collective dose is very important given the large numbers of people exposed to these. This paper presents an analysis of the number of negative radiologiacl examinations in a major Cuban Hospital, and their contribution to the collective dose, and radiation organ and tissue, effective (expressed as severe hereditary effect and the occurrence of fatal and non fatal cancers) are all evaluated. The negative findings constitute 41 % of all examinations. The total contribution of negative examinations to the collective dose is very important given the large numbers of people exposed to these. This papaer presents an analysis of the number of negative radiological examinations in major Cuban Hospital, and their contribution to the collective dose of radiation. The absorbed dose by irradiation organ and tissue, effective dose equivalent, collective dose, and radiation risk (expressed as severe herditary effect and the occureence of fatal and non fatal cancers) are all evaluated. The negative findings constitute 41% of all examinations. The total contribution of negative examinations. The total contribution of negative examinations to the collective dose are found to make up 52.9 %: 11.35 Sv-man in the studied population

  16. Radiologic evaluation of chondromalacia patellae

    International Nuclear Information System (INIS)

    Lund, F.; Nilsson, B.E

    1980-01-01

    In a series of patients in whom the patello-femoral joint has been examined by arthroscopy, in conjunction with arthrotomy or both, previously obtained films were reviewed. A series of radiologic morphometric measurements with bearing on the shape of the patella and the patello-femoral joint was carried out and compared between patients who had normal patello-femoral joints, patients with chondromalacia grade II or III and patients with chondromalacia grade IV or arthrosis. No difference between the three groups in any of the variables was found. However, a shallow excavation in the subchondral bone was observed in the lateral view of the patella in most of those patients with proven chondromalacia patellae. (Auth.)

  17. Gastric Mucosal Erosions - Radiologic evaluation -

    International Nuclear Information System (INIS)

    Kim, Seung Hyup

    1985-01-01

    70 cases of gastric mucosal erosions were diagnosed by double contrast upper gastrointestinal examinations and endoscopic findings. Analyzing the radiologic findings of these 70 cases of gastric mucosal erosions, the following results were obtained. 1. Among the total 70 cases, 65 cases were typical varioliform erosions showing central depressions and surrounding mucosal elevations. Remaining 5 cases were erosions of acute phase having multiple irregular depressions without surrounding elevations. 2. The gastric antrum was involved alone or in part in all cases. Duodenal bulb was involved with gastric antrum in 4 cases. 3. The majority of the cases had multiple erosions. There were only 2 cases of single erosion. 4. In 65 cases of varioliform erosions; 1) The diameter of the surrounding elevations varied from 3 to 20 mm with the majority (47 cases) between 6 and 10 mm. 2) In general, the surrounding elevations with sharp margin on double contrast films were also clearly demonstrated on compression films but those with faint margin were not. 3) The size of the central barium collections varied from pinpoint to 10 mm with the majority under 5 mm. The shape of the central barium collections in majority of the cases were round with a few cases of linear, triangular or star-shape. 5. In 5 cases of acute phase erosions; 1) All the 5 cases were females. 2) On double contrast radiography, all the cases showed multiple irregular depressed lesions without surrounding elevations. 3) 1 case had the history of hematemesis. 4) In 1 case, there was marked radiological improvement on follow-up study of 2 months interval. 6. In 23 cases, there were coexistent diseases with gastric mucosal erosions. These were 13 cases of duodenal bulb ulcers,7 cases of benign gastric ulcers and 3 others

  18. Radiologic evaluation of malignant histiocytoma

    International Nuclear Information System (INIS)

    Park, Ki Soon; Lee, Sun Wha; Yoon, Yup; Sung, Dong Wook; Ahn, Chi Yul

    1987-01-01

    Malignant fibrous histiocytoma is a new malignant tumor entity of histiocytic origin which arises as a primary tumor of the bone as well as the soft tissue. Radiologic features of 12 cases of pathologically proven intra-and extraosseous malignant fibrous histiocytoma were analyzed. The results were as follows : 1. Seven cases were of soft tissue origin and 5 cases were of primary bone origin. 2. Seven were male and 5 were female: Eight cases were beyond 5th decades. 3. The clinical presentations of malignant fibrous histiocytoma of the soft tissue origin were a mass with rapid growth or high rate of local recurrence. The roentgen evidence of soft tissue density mass was demonstrated in 7 cases and scintigraphic evidence of cortical invasion was suggested in 2 cases. 4. Malignant fibrous histiocytoma arising from bones had ill defined moth-eaten osteolytic lesion with cortical destruction, periosteal reaction and soft tissue extension. 5. Among 12 cases, there were 2 cases of pulmonary metastases and 2 cases of osseous metastases. 6. In the presence of soft tissue mass with locally aggressive behavior and/or nonspecific roentgen features of malignant bone tumor, one should consider the possibility of malignant fibrous histiocytoma

  19. Radiologic evaluation of pancreatic pseudocyst

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, T. H.; Kim, Y. J.; Hong, I. S.; Kim, M. S.; Sung, K. J. [Yeonsei University Wonju College of Medicine, Wonju (Korea, Republic of)

    1986-12-15

    Pancreatic pseudocyst is a collection of necrotic tissue, old blood and secretions that escaped from the pancreas damaged by pancreatitis, trauma and chronic alcoholism. There is no epithelial cell lining the cystic wall. With the advent of ultrasound and CT more accurate diagnosis can be made. Our study was carried out to analyse the radiological and clinical findings of 32 cases of pancreatic pseudocysts confirmed at Wonju College of Medicine Yonsei University from Jan. 1979 to Aug. 1986. The results are as follows: 1. Male to female ratio was 4.3:1 Incidence was the most common in 4th decades. 2. The most frequent symptom was epigastric pain (100%). 3. In a total of 32 cases, 15 cases had a underlying cause of pancreatitis, 9 cases abdominal trauma. 4. In laboratory findings, serum amylase level was elevated in 23 cases, leucocytosis in 10 cases. 5. On chest films, the lungs were mostly normal. Soft tissue mass density in 12 cases was the most common finding on abdomen films. 6. UGI series were helpful in directing attention by pancreatic pseudocysts' location and size. 7. Ultrasonogram using primary procedure for the detection of pseudocyst (23 cases) disclosed anechoic lesion in 8 cases, mixed echo lesion in 15 cases. Mixed echo patterns, in terms of internal echo patters, were echogenic spots (8 cases), septation and echogenic spots (3 cases), fluid-fluid level (3 cases), etc. 8. CT scanning is the best imaging procedure, providing detailed morphologic information about the pancreatic pseudocyst and surrounding tissue.

  20. Radiological evaluation of abdominal trauma

    International Nuclear Information System (INIS)

    Ahn, K. S.; Cho, Y. H.; Kim, O.

    1982-01-01

    Simple abdomen film has played an important role in decision of emergency operations in patients with the abdominal trauma. Nowadays, it still acts as a primary and inevitable processes in emergency condition. At the Department of Radiology, Hanil Hospital, 70 patients, who were laparotomied due to penetrating or nonpernetraing abdominal trauma, were observed and analyzed with simple abdomen film after comparison with the operative findings. The results are as follows: 1. Most frequent age distribution was 10 to 39 years and marked 70%. Male was in 90% incidence. 2. Penetrating injury largely involved the small bowel and abdominal wall. Non-penetrating injury usually involved the spleen, small bowel, liver, kidney, pancreas, duodenum. 3. Single organ injury occurred in higher incidence at the small bowel and abdominal wall. Multiple organ injury occurred in higher incidence at the spleen, liver, kidney and pancreas. 4. Organ distribution was 26% in spleen, 22% in small bowel, 14% in liver, 11% in abdominal wall. 7% in pancreas, 7% in kidney. 5% in duodenum, 4% in GB and CBD, 2% in diaphragm, 2% in colon, and 1% in stomach. 5. The specific roentgen findings and their frequency which useful in differential diagnosis at abdominal trauma, were as follows: a) flank fluid; Detectable possibility was 71% in liver laceration, 69% in spleen laceration and 57% in pancreas laceration. b) ipsilateral psoas shadow obliteration; Detectable possibility was 57% in liver laceration, 57% in kidney laceration and 46% in spleen laceration. c) free air; Detactable possibility was 60% in duodenal perforation, and 36% in peroration of upper part of small bowel. d) Reflex ileus; Detectable possibility was 64% in small bowel, 50% in liver laceration and 35% in spleen laceration. e) rib fracture; Detactable possibility was 36% in liver laceration and 23% in spleen laceration. f) pleural effusion; Detectable possibility was 29% in liver laceration and 27% in spleen laceration

  1. Radiological evaluation of failed total hip replacement

    International Nuclear Information System (INIS)

    Raspa, V.; Aldrovandi, S.; Pompei, G.

    1988-01-01

    The retrospective study of 50 operated cases of cemented total hip replacement and a review of the literature enabled the authors to define the radiological features of the above-mentioned condition. These features include one or more of the following signs: calcar reabsorption, lacunar erosions, modified relatioships between the prosthesis components, sepsis and loosening, periarticular calcifications dislocation and fracture of prosthesis components. Careful evaluation of these radiological features is extremely important for both an early diagnosis of failed total hip replacement and the choice of an adequate surgical treatment

  2. MR angiography and the preoperative evaluation of renal arteries

    International Nuclear Information System (INIS)

    Nakahara, Kimitoshi; Yokoyama, Hiroshi; Tsuji, Yuji

    2001-01-01

    To determine the accuracy of gadolinium-enhanced, three-dimensional, magnetic resonance angiography (3D-MRA) in the visualization of the arterial anatomy of the kidney, we compared preoperative 3D-MRA results with surgical findings in 37 patients who underwent renal surgery. 3D-MRA findings were confirmed surgically in 30 of these patients (81%). However, 4 of 7 accessory renal arteries were missed by this imaging technique. Furthermore, 3D-MRA failed to visualize renal arteries in all of the three atrophic kidneys. 3D-MRA is a safe and reliable procedure for the preoperative evaluation of renal arteries. However, the depiction of smaller renal arteries, such as accessory and atrophic arteries, is less accurate. (author)

  3. MR angiography and the preoperative evaluation of renal arteries

    Energy Technology Data Exchange (ETDEWEB)

    Nakahara, Kimitoshi; Yokoyama, Hiroshi; Tsuji, Yuji [Fukuoka Univ. (Japan). School of Medicine

    2001-04-01

    To determine the accuracy of gadolinium-enhanced, three-dimensional, magnetic resonance angiography (3D-MRA) in the visualization of the arterial anatomy of the kidney, we compared preoperative 3D-MRA results with surgical findings in 37 patients who underwent renal surgery. 3D-MRA findings were confirmed surgically in 30 of these patients (81%). However, 4 of 7 accessory renal arteries were missed by this imaging technique. Furthermore, 3D-MRA failed to visualize renal arteries in all of the three atrophic kidneys. 3D-MRA is a safe and reliable procedure for the preoperative evaluation of renal arteries. However, the depiction of smaller renal arteries, such as accessory and atrophic arteries, is less accurate. (author)

  4. Radiological evaluation of acoustic neurinoma

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jong Tae; Park, Chang Yun; Choi, Byung So [Yonsei University College of Medicine, Seoul (Korea, Republic of)

    1974-04-15

    All 25 patients surgically proven acoustic neurinoma was analysed clinically, radiographically at Severance Hospital of Yonsei Univ. The patients not proved surgically in spite of clinical diagnosis of acoustic neurinoma was excluded from this study. The results are summarized as follows; The clinical findings are; 1. The incidence of tumor in female was twice more frequent than in male and the range of age was 20-50 years peak of age at onset of symptom. 2. The clinical symptoms were variable from unilateral hearing impairment or less (100%), headache (84%) to tinnitus (60%) in order of frequency. 3. The tumor growth in the left cerebellopontine angle was twice more than in the right side with the radio of 16:8. However, in one case bilateral simultaneous growth of acoustic neurinoma was noted. The radiological findings are: The best radiographic method to study the shape and size of internal acoustic canal to demonstrate erosion or destruction of petrous pyramida was considered to be straight frontal view and tomography of the skull in our series. 1. The shape of internal acoustic canal in tumors were straight (in 2 cases), bulbous (in 12 cases), and flared (in 11 cases). Particularly there was erosion or destruction of petrous bone in all of the flared cases of canal. 2. The acoustic meatal erosion was mainly suprameatal in 14 cases of 17 which was noted definite erosion radiographically. 3. The difference of height (vertical diameter) of both side of acoustic canal were follows; 6 cases among 25 was in the range of 0-2 mm measurement, remainder was more than 2 mm. Hence the variation in greater than 1 mm in between both sides of canal in same patient should be regard as abnormal as of acoustic neurinoma. 4. The carotid angiogram shows hydrocephalic pattern in 12 cases among 17. 5. In the vertebral angiogram of 8 cases, anterolateral displacement of basilar artery (in 6 caes), the upward displacement of superior cerebellar artery (in 4 cases) was common findings

  5. Radiological evaluation of acoustic neurinoma

    International Nuclear Information System (INIS)

    Lee, Jong Tae; Park, Chang Yun; Choi, Byung So

    1974-01-01

    All 25 patients surgically proven acoustic neurinoma was analysed clinically, radiographically at Severance Hospital of Yonsei Univ. The patients not proved surgically in spite of clinical diagnosis of acoustic neurinoma was excluded from this study. The results are summarized as follows; The clinical findings are; 1. The incidence of tumor in female was twice more frequent than in male and the range of age was 20-50 years peak of age at onset of symptom. 2. The clinical symptoms were variable from unilateral hearing impairment or less (100%), headache (84%) to tinnitus (60%) in order of frequency. 3. The tumor growth in the left cerebellopontine angle was twice more than in the right side with the radio of 16:8. However, in one case bilateral simultaneous growth of acoustic neurinoma was noted. The radiological findings are: The best radiographic method to study the shape and size of internal acoustic canal to demonstrate erosion or destruction of petrous pyramida was considered to be straight frontal view and tomography of the skull in our series. 1. The shape of internal acoustic canal in tumors were straight (in 2 cases), bulbous (in 12 cases), and flared (in 11 cases). Particularly there was erosion or destruction of petrous bone in all of the flared cases of canal. 2. The acoustic meatal erosion was mainly suprameatal in 14 cases of 17 which was noted definite erosion radiographically. 3. The difference of height (vertical diameter) of both side of acoustic canal were follows; 6 cases among 25 was in the range of 0-2 mm measurement, remainder was more than 2 mm. Hence the variation in greater than 1 mm in between both sides of canal in same patient should be regard as abnormal as of acoustic neurinoma. 4. The carotid angiogram shows hydrocephalic pattern in 12 cases among 17. 5. In the vertebral angiogram of 8 cases, anterolateral displacement of basilar artery (in 6 caes), the upward displacement of superior cerebellar artery (in 4 cases) was common findings

  6. Efficacy of radiology of the esophagus for evaluation of dysphagia

    Energy Technology Data Exchange (ETDEWEB)

    Ott, D.J.; Gelfand, D.W.; Wu, W.C.

    1981-05-15

    The efficacy of radiology in evaluating dysphagia was studied in 86 patients by comparison to endoscopic findings. In the 66 patients with endoscopic abnormalities radiology was correct in 54, for a sensitivity of 82%. Sensitivity of radiology improved to 95% if mild esophagitis was excluded. In the 20 patients with normal endoscopy, radiology was normal in 18 (90%). Thus radiology proved to be a reliable means of evaluating the esophagus in patients with dysphagia.

  7. MR urography for the preoperative evaluation of living renal donors

    Energy Technology Data Exchange (ETDEWEB)

    Bakker, Jeannette; Kort, Gerard A.P. de; Lo, Rob; Gils, A.P.G. van; Beek, Frederik J.A. [Department of Radiology, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands); Hene, Ronald J. [Department of Nephrology, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands); Lock, Tycho M.T.W. [Department of and Urology, University Hospital Utrecht, Heidelberglaan 100, 3584 CX Utrecht (Netherlands); Burger, Huib [Julius Center for Patient Oriented Research, University of Utrecht, 3584 CX Utrecht (Netherlands)

    2002-08-01

    The purpose of this study was to assess the image quality and diagnostic value of MR urography in detecting abnormalities of the urinary collecting system relevant for the preoperative evaluation of living renal donors. Study subjects were selected from the existing intravenous urography (IVU) reports: 18 consecutive patients with a duplication or another abnormality of the collecting system and 20 consecutive patients with normal anatomy. They underwent a respiratory-triggered 3D T2-weighted fast spin-echo acquisition after oral administration of furosemide, without and with abdominal compression. The MR images were evaluated by two independent blinded observers. The IVU was used as the standard of reference. Image quality of the MR urograms with compression was overall better than those without compression, and the former were regarded as adequate for the evaluation of small filling defects and deformities of the pelvis and calyces in 76-81% of the kidneys and 74-79% of the patients. Both observers correctly diagnosed all 13 kidneys with a partial or complete duplication. The image quality of MR urography was inadequate to evaluate the calyces and pelvis for small filling defects or deformities in approximately 25% of the patients; however, the technique was accurate in the detection of abnormalities of the urinary collecting system relevant for the preoperative evaluation of living renal donors. (orig.)

  8. Effect of Preoperative Radiological Treatment of Hepatocellular Carcinoma Before Liver Transplantation: A Retrospective Study

    International Nuclear Information System (INIS)

    Veltri, Andrea; Grosso, Maurizio; Martina, Maria C.; Ciancio, Alessia; David, Ezio; Salizzoni, Mauro; Soldano, Umberto; Galli, Joseph; Fava, Cesare

    1998-01-01

    Purpose: To assess the results of radiological treatment of patients with hepatocellular carcinoma (HCC) performed before orthotopic liver transplantation (OLT). Methods: Sixty-two transplanted patients with a total of 89 HCC nodules were studied; 50 lesions in 38 patients had been treated prior to OLT with transcatheter arterial chemoembolization (TACE; n= 29), percutaneous ethanol injection (PEI; n= 10), or combined therapy (TACE + PEI; n= 11). The induced necrosis was pathologically evaluated. The recurrence rate after OLT in the treated group of patients (n= 38) was compared with that in the non-treated group (n= 24). Results: After TACE, necrosis was complete in 7 of 29 lesions (24.1%), partial in 11 of 29 (37.9%), and absent in 11 of 29 (37.9%). After PEI, necrosis was complete in 8 of 10 lesions (80%), and partial in 2 of 10 (20%). Using combined therapy, necrosis was complete in 11 of 11 lesions (100%). Four of 24 untreated and 4 of 38 treated patients did not survive OLT from causes not related to the HCC; 3 of 20 non-treated patients (15%) and 4 of 34 treated patients (11.8%) had post-OLT recurrence (these last four patients had undergone only TACE and did not have tumor necrosis at pathological examination). Conclusion: TACE of HCC prior to OLT had no influence on the recurrence rate. PEI and combined therapy (TACE + PEI) may be recommended in patients awaiting OLT

  9. Inadequate preoperative colonic evaluation for synchronous colorectal cancer

    DEFF Research Database (Denmark)

    Achiam, M P; Burgdorf, S K; Wilhelmsen, M

    2009-01-01

    synchronous lesions in 11-44%. The purpose of this study was to review all patients having surgery for CRC in our department since 2001, and to evaluate the extent of the perioperative colonic evaluation. MATERIALS AND METHODS: The records of all patients operated for CRC between Jan. 2001 and Dec. 2007...... in our department were reviewed. Only patients with CRC were included. Information regarding pre-, per- and postoperative colonic evaluation were obtained and occurrences of SC were evaluated. RESULTS: Of the 534 patients included 124 (23%) patients had an impassable stenosis. Full preoperative colonic...... evaluation (FPCE) were done in 305 (26%) patients without stenosis. In 36 patients 39 SC were diagnosed. Seven SC were diagnosed postoperatively, of which five patients never had a FPCE. Three of these five patients had an inoperable SC, one patient died due to anastomosis leakage following re...

  10. Diabetic muscle infarction: radiologic evaluation

    International Nuclear Information System (INIS)

    Chason, D.P.; Fleckenstein, J.L.; Burns, D.K.; Rojas, G.

    1996-01-01

    Four patients with severe diabetes mellitus presenting with acute thigh pain, tenderness, and swelling were evaluated by imaging techniques and biopsy. Edema in the affected muscles was seen in two patients with MRI studies. Femoral artery calcification and mild muscle swelling was present in one patient who underwent CT. Decreased echogenicity was seen in the involved muscle in a patient studied with ultrasound. Serum enzymes were normal or mildly elevated in three patients (not reported in one). Biopsy demonstrated necrosis and regenerative change in all cases. MRI, although nonspecific, is the best imaging technique to suggest the diagnosis of DMI in the appropriate clinical setting, thereby obviating biopsy. (orig./MG)

  11. Radiologic evaluation of wrist arthrography

    International Nuclear Information System (INIS)

    Park, Yang Hee; Seong, Hyeun Lim; Yang, Jae Beom; Park, Chan Sup; Lee, Sang Seun

    1991-01-01

    Wrist arthrography allows direct visualization of the cartilage and synovial structure not seen in plain film. Arthrography of the wrist is valuable in evaluating patients with persistent wrist pain and limitation of motion after trauma. Wrist arthrography was performed in the evaluation of 30 patients with rheumatoid arthritis (2 cases), ganglions (12 cases), and wrist trauma (16 cases), and contrast media was injected in radiocarpal joint. The arthrographic findings were analyzed, and the results were as follows: In 16 patients with wrist trauma, 12 cases (75%) of compartment communication was seen including communication with distal radioulnar joint (44%), midcarpal joint (69%), and common carpometacarpal joint (63%). Of the total 30 patients, the pisiform-triquetral joint communicated with the radio carpal joint in 9 cases (30%). In 16 patients with trauma, the findings of post-traumatic arthritis included tendon communication (50%), irregular synovium (31%), and rupture of the joint capsule (25%). There was no lymphatic filling. Of 3 scaphoid fracture patients without bony callus formation, fibrous union was verified in one patient and nouncion in 2. O 12 patients with ganglion, communication between the ganglion and radiocarpal joint was seen in 2 cases and no communication in 10 cases

  12. Radiologic evaluation of the myelomeningocele patient

    International Nuclear Information System (INIS)

    Byrd, S.E.; Radkowski, M.A.; McLone, D.G.; Storrs, B.B.

    1988-01-01

    The only radiologic procedure that is useful in the newborn with a fresh myelomeningocele is US or CT of the head to evaluate ventricular size. The imaging procedures become extremely important in the evaluation of the postoperative patient with myelomeningocele. US and/or CT is used to evaluate for hydrocephalus. MR is used to evaluate the spinal axis to determine the position of the cervicomedullary kink, hydromyelia, arachnoid cyst, inclusion epidermoids, and tethering of the spinal cord. US and myelography with CT are needed in subtle cases of tethering, diastematomyelia, arachnoid cyst, and severe scoliosis

  13. MRI diagnosis and preoperative evaluation for hepatic hilar tumor

    International Nuclear Information System (INIS)

    Liu Yulin; Kong xiangquan; Xu Haibo; Xiao Xuehong; Liu Dingxi; Peng Zhenjun

    2004-01-01

    Objective: To investigate the value of the all-in-one MR scanning in the diagnosis and preoperative evaluation of hepatic hilar tumor. Methods: Forty-two cases of hepatic hilar tumors were examined with a 1.5 T superconductive MR system, including hepatocellular carcinoma (HCC, n=12), hilar cholangiocarcinoma (HC, n=22), and hilar metastasis (n=8). Besides the precontrast MRI and MRCP, all cases underwent consecutive dynamic contrast-enhanced MR scanning. The whole liver dynamic contrast-enhanced MR was performed with the first bolus injection of Gd-DTPA (10 ml), and 15 minutes later, 3D DCE MRA was performed with additional injection of Gd-DTPA (15-20 ml) (0.15-0.20 mmol/kg). The contrast time-signal curve of liver and tumor was drawn, and arterial and portal venous phase images were reconstructed with MIP. MR appearances were compared with surgical findings and pathology. Results: Consecutive DCE scanning was successfully performed in all cases. The contrast time-signal curve of HCC showed type I and II (10/12, 83.3%), and the curve of HC showed type III and IV (21/22, 95.4%), whereas the curve of metastasis was various. The difference of tumor peak transit time (PT) between HCC group and HC group was significant (P<0.05). The vascular invasion in HCC group appeared as arterial-portal vein fistula (2/12, 16.7%), portal vein infiltration (3/24, 12.5%), and occlusion by tumor thrombosis (4/24, 16.7%). However, the vascular invasion in HC group showed spiral artery (5/22, 22.7%), portal vein infiltration (5/44, 11.4%), portal vein central narrowing (8/44, 18.2%) and occlusion (11/44, 25.0%). All metastasis had no vascular invasion expect one gall bladder carcinoma with right portal vein infiltration. The accuracy of preoperative evaluation with MRI in HCC group and HC group was 83.3% (10/12) and 86.4% (19/22), respectively. The accuracy of preoperative evaluation in all hilar tumors was 78.6% (33/42). Conclusion: Consecutive DCE was a safe and useful technique in MR

  14. Radiological evaluation of myositis ossificans

    International Nuclear Information System (INIS)

    Kwon, Yang Sook; Kim, Soo Han; Lim, Young Chae; Shin, Hyun Ja

    1986-01-01

    The 35 patients who have suffered from myositis ossificans were investigate for 11 years. They were post traumatic patients. They trauma was divided into 3 groups; spinal cord injury, direct injury (fracture) and mixed type involving both. We evaluated the age distribution, the frequency of myositis ossificans, predilection site, bilaterally and relation between predilection site and bilaterally to the type of trauma. The results are as follows; 1. The age distribution was highest in 4th decades (12 among 35 patients). 2. In regard to distribution of 35 patients, spinal cord injury were most common (15 cases, 43%), the fracture nextly common (14, 40%) and then mixed type (6, 17%). 3. Among 51 cases of myositis ossificans, the frequency was highest in spinal cord injury (25 cases, 49%), next was fracture (14, 27%). 4. The predilection site of myositis ossificans were thigh (18 cases, 35%), hip (17, 33%) and buttock (6, 12%). 5. In correlation between predilection site of myositis ossificans and level of spinal cord injury, hip is the most frequent site in thoracic injury. 6. The bilaterally of myositis ossificans is 39% (20 among 51 lesions).

  15. CT evaluation of preoperative cochlear implantation cochlear implantation

    International Nuclear Information System (INIS)

    Tan Xiuzhong; Zhong Lansheng; Lan Bowen; Huang Yaosheng; Du Baowen; Zhu Jian

    2004-01-01

    Objective: To evaluate CT scan as a preoperative evaluation for cochlear implantation candidates. Methods: Axial high-resolution temporal bone CT and three-dimensional reconstruction of inner ear were performed in 93 patients with sensorineural hearing loss. results: Among 81 patients with congenital sensorineural deafness, Mondini malformation was seen in 7 case (13 ears); large vestibular aqueduct syndrome (LVAS) was revealed in 5 cases (8 ears); and inner ear ossification was found in 1 case (2 ears). In 1 case (2 ears) of inner ear fibrosis, reduced cochlear signal was noted on MRI but no unremarkable findings was shown on CT scan, however, in the operation, the device could not inserted into the basal circle of the cochlea, due to fibrous obliteration. In 12 patients with post-speech deafness, chronic suppurative tympanitis was seen in 2 cases (4 ears), and inner ear ossification was revealed in 1 case (2 ears). Conclusion: CT plays an indispensable role in the pre-operative evaluation of cochlear implantation. T 2 -weighted FSE-MRI of the inner ear is a useful complementary to CT scan. (authors)

  16. Post-deployment usability evaluation of a radiology workstation

    NARCIS (Netherlands)

    Jorritsma, Wiard; Cnossen, Fokie; Dierckx, Rudi; Oudkerk, Matthijs; van Ooijen, Peter

    2015-01-01

    Objective To evaluate the usability of a radiology workstation after deployment in a hospital. Significance In radiology, it is difficult to perform valid pre-deployment usability evaluations due to the heterogeneity of the user group, the complexity of the radiological workflow, and the complexity

  17. Evaluating the radiological health compliance of some beach ...

    African Journals Online (AJOL)

    Journal of Applied Sciences and Environmental Management ... Evaluating the radiological health compliance of some beach environments in Delta State ... as well as specified members of the public (customers) are not at radiological risk.

  18. Radiological and pathological response following pre-operative radiotherapy for soft-tissue sarcoma

    International Nuclear Information System (INIS)

    Roberge, David; Skamene, Tanya; Nahal, Ayoub; Turcotte, Robert E.; Powell, Tom; Freeman, Carolyn

    2010-01-01

    Purpose: To report radiological and pathological response to neo-adjuvant radiotherapy for extremity and trunk soft-tissue sarcomas. Materials/methods: Fifty patients were identified retrospectively. All patients had MRI imaging pre and post neo-adjuvant external beam radiotherapy. Tumor volumes were measured in 3D on T1 Gadolinium enhanced sequences. Pathological treatment response was quantified in terms of percentage of treatment-related necrosis for each case. Results: Histopathologic responses to treatment varied from 0% to 100%. The median pathological treatment response was 67.5% for low-grade sarcomas and 50% for high-grade sarcomas. The median decrease in tumor volume was 13.8% for non-myxoid low-grade sarcomas, 82.1% for myxoid liposarcomas and <1% for high-grade sarcomas. A partial response on MRI (volume reduction ≥ 50%) was highly predictive of a good pathological response (p < 0.001). Patients with stable disease on imaging or volumetric progression had wide ranging pathological responses. Conclusions: Soft-tissue sarcomas show significant pathological treatment responses in the form of hyaline fibrosis, necrosis and granulation tissue. Despite this, there is minimal early volumetric response to radiation, especially for high-grade tumors. Although radiological partial response was predictive of pathological response, the significance of radiological progression was unclear. Myxoid liposarcoma tumor type was predictive of both pathological and radiological tumor response.

  19. Angiographic evaluation of response to preoperative chemotherapy in osteosarcoma

    International Nuclear Information System (INIS)

    Carrasco, C.H.; Charnsangavej, C.; Richii, W.; Wallace, S.; Chawla, S.P.; Raymond, A.K.; Murray, J.A.; Benjamin, R.S.

    1986-01-01

    Preoperative chemotherapy for osteosarcoma facilitates local resection for limb salvage and serves as an in vivo chemosensitivity assay. Arteriograms obtained with each intraarterial course of cisplatin in 79 patients with osteosarcoma were evaluated. Complete remission was defined as complete or nearly complete disappearance of tumor vascularity after treatment. A minimal decrease, no change, or an increase in tumor vascularity was not considered a response. If a complete remission is assumed to represent ≥ 90% histologic tumor necrosis which correlates with prolonged disease-free survival, the sensitivity of an angiographic complete remission was 95%, the specificity was 58%, the predictive value of a negative study was 90%, and the predictive value of a positive study was 75%. Angiography is the best clinical technique for evaluating the therapeutic response in osteosarcoma. Results correlate well with the degree of tumor necrosis, particularly in respect to significant residual viable tumor

  20. Preoperative and postoperative evaluation of clinical symptoms of cervical myelopathy

    International Nuclear Information System (INIS)

    Ito, Tomokazu; Oshima, Yoshihiko; Ota, Yoshio

    1993-01-01

    To evaluate the clinical significance of signal changes on T2-weighted magnetic resonance (MR) images in myelopathy, the relationship between characteristics of clinical symptoms and postoperative recovery was examined. The subjects were a total of 52 patients (37 men and 15 women) with cervical myelopathy (n=44) or ossification of the posterior longitudinal ligament (n=8), who underwent extended surgery of Yamagata University's style. They ranged in age from 33 to 81 years (mean, 60.8). The degree of spinal compression and signal changes in the spinal cord were classified on T1-weighted and T2-weighted sagittal images, respecstively. Hyperintense on T2-weighted images tended to be associated with lower preoperative JOA's scores especially for exercise, legs and bladder or rectum function, as compared with isointense. T2-weighted images seemed to reflect, to some degree, the severity of preoperative clinical symptoms. For the rate of postoperative improvement, however, there was no significant difference between the hyperintense and isointense groups on T2-weighted images. (N.K.)

  1. Preoperative radiological characterization of hepatic angiomyolipoma using magnetic resonance imaging and contrast-enhanced ultrasonography: a case report

    Directory of Open Access Journals (Sweden)

    Schmid Roland M

    2011-09-01

    Full Text Available Abstract Introduction A hepatic angiomyolipoma is a rare benign tumor of the liver composed of a mixture of smooth muscle cells, blood vessels and a variable amount of adipose tissue. Differentiating them from malignant liver tumors can often be very difficult. Case presentation We report the case of a 43-year-old Caucasian man presenting with a large liver mass in the right lobe. The results of magnetic resonance imaging and contrast-enhanced ultrasonography were consistent with a well-demarcated adipose tissue- containing tumor, showing prolonged hyperperfusion in comparison with the surrounding liver tissue. Surgery was performed and the diagnosis of hepatic angiomyolipoma was made with histopathology. Conclusion Preoperative radiological characterization using magnetic resonance imaging and contrast-enhanced ultrasonography may improve diagnostic accuracy of hepatic angiomyolipoma. Identification of smooth muscle cells, blood vessels and adipose tissue with a positive immunohistochemical reaction for HMB-45 is the final evidence for an angiomyolipoma.

  2. Radiological Evaluation Standards in the Radiology Department of Shahid Beheshti Hospital (RAH) YASUJ Based on Radiology standards in 92

    OpenAIRE

    A َKalantari; SAM Khosravani

    2014-01-01

    Background & aim: Radiology personnel’s working in terms of performance and safety is one of the most important functions in order to increase the quality and quantity. This study aimed to evaluate the radiological standards in Shahid Beheshti Hospital of Yasuj, Iran, in 2013. Methods: The present cross-sectional study was based on a 118 randomly selected graphs and the ranking list, with full knowledge of the standards in radiology was performed two times. Data were analyzed using descri...

  3. Iliopsoas compartment lesions: a radiologic evaluation

    International Nuclear Information System (INIS)

    Leao, Alberto Ribeiro de Souza; Amaral, Raquel Portugal Guimaraes; Abud, Thiago Giansante; Demarchi, Guilherme Tadeu Sauaia; Freire Filho, Edison de Oliveira; Novack, Paulo Rogerio; Campos, Flavio do Amaral; Shigueoka, David Carlos; Fernandes, Artur da Rocha Correa; Szejnfeld, Jacob; D'Ippolito, Giuseppe

    2007-01-01

    The iliopsoas compartment, a posterior boundary of the retroperitoneum, is comprised of the psoas major, psoas minor and iliac muscles. The symptoms picture in patients presenting with pathological involvement of this compartment may show a wide range of nonspecific clinical presentations that may lead to delayed diagnosis. However, in the search of an etiological diagnosis, it is already known that inflammation, tumors, and hemorrhages account for almost all the lesions affecting the iliopsoas compartment. By means of a retrospective analysis of radiological studies in patients with iliopsoas compartment lesions whose diagnosis was confirmed by anatomopathological evaluation or clinical follow-up, we have reviewed its anatomy as well as the main forms of involvement, with the purpose of identifying radiological signs that may help to narrow down the potential differential diagnoses. As each lesion is approached we will discuss the main radiological findings such as presence of gas in pyogenic abscesses, bone destruction and other bone changes of vertebral bodies in lesions secondary to tuberculosis, involvement of fascial planes in cases of neoplasms, and differences in signal density and intensity of hematomas secondary to hemoglobin degradation, among others. So, we have tried to present cases depicting the most frequent lesions involving the iliopsoas compartment, with emphasis on those signs that can lead us to a more specific etiological diagnosis. (author)

  4. Iliopsoas compartment lesions: a radiologic evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Leao, Alberto Ribeiro de Souza; Amaral, Raquel Portugal Guimaraes; Abud, Thiago Giansante; Demarchi, Guilherme Tadeu Sauaia; Freire Filho, Edison de Oliveira; Novack, Paulo Rogerio; Campos, Flavio do Amaral; Shigueoka, David Carlos; Fernandes, Artur da Rocha Correa; Szejnfeld, Jacob; D' Ippolito, Giuseppe [Universidade Federal de Sao Paulo (UNIFESP-EPM), Sao Paulo, SP (Brazil). Dept. de Diagnostico por Imagem]. E-mail: ar.leao@uol.com.br; Santos, Jose Eduardo Mourao [Universidade Federal de Sao Paulo (UNIFESP-EPM), Sao Paulo, SP (Brazil)

    2007-07-15

    The iliopsoas compartment, a posterior boundary of the retroperitoneum, is comprised of the psoas major, psoas minor and iliac muscles. The symptoms picture in patients presenting with pathological involvement of this compartment may show a wide range of nonspecific clinical presentations that may lead to delayed diagnosis. However, in the search of an etiological diagnosis, it is already known that inflammation, tumors, and hemorrhages account for almost all the lesions affecting the iliopsoas compartment. By means of a retrospective analysis of radiological studies in patients with iliopsoas compartment lesions whose diagnosis was confirmed by anatomopathological evaluation or clinical follow-up, we have reviewed its anatomy as well as the main forms of involvement, with the purpose of identifying radiological signs that may help to narrow down the potential differential diagnoses. As each lesion is approached we will discuss the main radiological findings such as presence of gas in pyogenic abscesses, bone destruction and other bone changes of vertebral bodies in lesions secondary to tuberculosis, involvement of fascial planes in cases of neoplasms, and differences in signal density and intensity of hematomas secondary to hemoglobin degradation, among others. So, we have tried to present cases depicting the most frequent lesions involving the iliopsoas compartment, with emphasis on those signs that can lead us to a more specific etiological diagnosis. (author)

  5. Real-Time MRI Navigated Ultrasound for Preoperative Tumor Evaluation in Breast Cancer Patients: Technique and Clinical Implementation

    Energy Technology Data Exchange (ETDEWEB)

    Park, Ah Young; Seo, Bo Kyoung [Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan 15355 (Korea, Republic of)

    2016-11-01

    Real-time magnetic resonance imaging (MRI) navigated ultrasound is an image fusion technique to display the results of both MRI and ultrasonography on the same monitor. This system is a promising technique to improve lesion detection and analysis, to maximize advantages of each imaging modality, and to compensate the disadvantages of both MRI and ultrasound. In evaluating breast cancer stage preoperatively, MRI and ultrasound are the most representative imaging modalities. However, sometimes difficulties arise in interpreting and correlating the radiological features between these two different modalities. This pictorial essay demonstrates the technical principles of the real-time MRI navigated ultrasound, and clinical implementation of the system in preoperative evaluation of tumor extent, multiplicity, and nodal status in breast cancer patients.

  6. Real-time MRI navigated ultrasound for preoperative tumor evaluation in breast cancer patients: Technique and clinical implementation

    Energy Technology Data Exchange (ETDEWEB)

    Park, Ah Young; Seo, Bo Kyoung [Dept. of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan (Korea, Republic of)

    2016-09-15

    Real-time magnetic resonance imaging (MRI) navigated ultrasound is an image fusion technique to display the results of both MRI and ultrasonography on the same monitor. This system is a promising technique to improve lesion detection and analysis, to maximize advantages of each imaging modality, and to compensate the disadvantages of both MRI and ultrasound. In evaluating breast cancer stage preoperatively, MRI and ultrasound are the most representative imaging modalities. However, sometimes difficulties arise in interpreting and correlating the radiological features between these two different modalities. This pictorial essay demonstrates the technical principles of the real-time MRI navigated ultrasound, and clinical implementation of the system in preoperative evaluation of tumor extent, multiplicity, and nodal status in breast cancer patients.

  7. Preoperative and post-operative sleep quality evaluation in rotator cuff tear patients.

    Science.gov (United States)

    Serbest, Sancar; Tiftikçi, Uğur; Askın, Aydogan; Yaman, Ferda; Alpua, Murat

    2017-07-01

    The aim of this study was to examine the potential relationship between subjective sleep quality and degree of pain in patients with rotator cuff repair. Thirty-one patients who underwent rotator cuff repair prospectively completed the Pittsburgh Sleep Quality Index, the Western Ontario Rotator Cuff Index, and the Constant and Murley shoulder scores before surgery and at 6 months after surgery. Preoperative demographic, clinical, and radiologic parameters were also evaluated. The study analysed 31 patients with a median age of 61 years. There was a significant difference preoperatively versus post-operatively in terms of all PSQI global scores and subdivisions (p Rotator Cuff Scale and the Constant and Murley shoulder scores (p ˂ 0.001). Sleep disorders are commonly seen in patients with rotator cuff tear, and after repair, there is an increase in the quality of sleep with a parallel improvement in shoulder functions. However, no statistically significant correlation was determined between arthroscopic procedures and the size of the tear and sleep quality. It is suggested that rotator cuff tear repair improves the quality of sleep and the quality of life. IV.

  8. Preoperative evaluation of synchronous colorectal cancer using MR colonography

    DEFF Research Database (Denmark)

    Achiam, Michael P; Holst Andersen, Lars P; Klein, Mads

    2009-01-01

    RATIONALE AND OBJECTIVES: It is well known that synchronous cancers (incidence, 2%-11%) and polyps (incidence, 12%-58%) occur in patients with colorectal cancer. Magnetic resonance colonography (MRC) seems like the obvious choice as a diagnostic tool in preoperative evaluation, because...... a full conventional colonoscopy or in whom full conventional colonoscopy was not possible. MATERIALS AND METHODS: In a 13-month period, 47 patients diagnosed with rectal or sigmoid colon cancer scheduled for operation were included in the study. MRC was performed with bowel purgation either the night...... before surgery or as ambulatory MRC the week before surgery. RESULTS: Full MRC was performed in 98% of the patients. In four patients, 12 synchronous lesions (one cancer, two plaques of carcinosis, and nine adenomas) were found. One flat adenoma and five small polyps were missed by MRC and perioperative...

  9. Diagnostic imaging in liver transplantation. Preoperative evaluation and postoperative complications

    International Nuclear Information System (INIS)

    Schroeder, T.; Ruehm, S.G.

    2005-01-01

    Complimentary to orthotopic liver transplantation (OLT), living donor liver transplantation (LDLT) is increasingly considered a therapeutic option in the therapy of end-stage liver disease. Accurate pre- and postoperative imaging is crucial for the transplantation success and represents an established part of the current evaluation algorithms. This article summarizes the most important requirements and the current imaging standards. Preoperative imaging is important for exclusion of transplantation contraindications in the recipient and for reliable assessment of anatomical variants in the donor. The main purpose of postoperative imaging is the early detection and characterization of complications. In both instances, multislice CT currently represents the most versatile and reliable imaging modality, still superior to MRI. For postoperative follow-up, the imaging modality of first choice is still bedside ultrasound; however, unclear findings usually need to be further assessed by CT. (orig.) [de

  10. Preoperative radiological diagnosis by 99mTc·MIBI-99mTc subtraction scintigraphy for primary hyperparathyroidism

    International Nuclear Information System (INIS)

    Inouye, Takahiro; Tomita, Toshiki; Shinden, Seiichi; Takagi, Hitoshi; Kano, Shigeru.

    1996-01-01

    Preoperative radiological diagnosis constitutes the most important factor for the surgical treatment of hyperparathyroidism. In this regard, MRI is useful for detecting the abnormal parathyroid, but it is often difficult to localize it using MRI only. It is thus necessary to combine this procedure with excellent subtraction scintigraphy. We performed both 201 Tl- 99m Tc and 99m Tc·MIBI- 99m Tc subtraction scintigraphy in seven patients with primary hyperparathyroidism and compared them the radiological results. Five patients presented parathyroid adenomas and the rest hypertrophy of the parathyroid. We could detect the abnormal parathyroid in four patients (57.1%) by 201 Tl- 99m Tc subtraction scintigraphy and in six patients (85.7%) by 99m Tc·MIBI- 99m Tc subtraction scintigraphy. We therefore believe that 99m Tc·MIBI- 99m Tc subtraction scintigraphy will become an essential examination for primary hyperparathyroidism rather than the presently employed 201 Tl- 99m Tc subtraction scintigraphy. (author)

  11. Relevance of computerized tomography in the preoperative evaluation of patients with vulvar cancer

    DEFF Research Database (Denmark)

    Andersen, Kjeld; Zobbe, Vibeke; Thranov, Ingrid Regitze

    2015-01-01

    University Hospital, Rigshospitalet. The patients underwent a gynecological examination, chest x-ray and a preoperative CT scanning of the chest, abdomen and pelvis. It was registered whether the radiological findings regarding the extent of the tumor, lymph node involvement, incidental findings...

  12. Radiological evaluation of the cervical spinal trauma

    Energy Technology Data Exchange (ETDEWEB)

    Bae, W. K.; Koh, B. H.; Hahm, C. K.; Kim, J. J. [School of Medicine, Hanyang University, Seoul (Korea, Republic of)

    1983-03-15

    Acute injuries of the cervical spine are the most common causes of severe disability following trauma, yet the diagnosis of these injuries are often delayed and the treatment, inadequate. Traumatic injuries of the cervical spine are diagnosed by radiological examinations. And complete evaluations of bony structures and soft tissue changes on conventional radiograms are very important for determining the therapeutic plans and prognoses of the injuries patients. During the period of 5 years from June 1976 to May 1981, the radiological and clinical evaluation had been made on 38 patients suffered from acute cervical spinal injuries which were confirmed by the radiological examinations. The results were as follows. 1. Age distribution of total 38 patients was broad ranging from 19 years to 72 years. 2. The most common cause of injury was traffic accident, next fall down, other accident respectively. 3. Levels of the cervical spinal injuries were as follows: Upper cervical spine in 15.8%, lower cervical spine in 84.2%, and the most common injuries level was C 5. Most of the lower cervical spinal injuries were located in the vertebral body and spinous process. 4. Anatomical sites of the cervical spinal injuries were as follows; vertebral body in 55.5%, spinous process in 23.7%, neural arch in 15.8%, and locked facet in 18.4%, etc. 5. Most of the patients with severe mental changes were injuries in upper cervical spine rather than lower. And most of the patients with quadriplegia or paraplegia were shown marked disruption of spinal canal.

  13. Radiological evaluation of the cervical spinal trauma

    International Nuclear Information System (INIS)

    Bae, W. K.; Koh, B. H.; Hahm, C. K.; Kim, J. J.

    1983-01-01

    Acute injuries of the cervical spine are the most common causes of severe disability following trauma, yet the diagnosis of these injuries are often delayed and the treatment, inadequate. Traumatic injuries of the cervical spine are diagnosed by radiological examinations. And complete evaluations of bony structures and soft tissue changes on conventional radiograms are very important for determining the therapeutic plans and prognoses of the injuries patients. During the period of 5 years from June 1976 to May 1981, the radiological and clinical evaluation had been made on 38 patients suffered from acute cervical spinal injuries which were confirmed by the radiological examinations. The results were as follows. 1. Age distribution of total 38 patients was broad ranging from 19 years to 72 years. 2. The most common cause of injury was traffic accident, next fall down, other accident respectively. 3. Levels of the cervical spinal injuries were as follows: Upper cervical spine in 15.8%, lower cervical spine in 84.2%, and the most common injuries level was C 5. Most of the lower cervical spinal injuries were located in the vertebral body and spinous process. 4. Anatomical sites of the cervical spinal injuries were as follows; vertebral body in 55.5%, spinous process in 23.7%, neural arch in 15.8%, and locked facet in 18.4%, etc. 5. Most of the patients with severe mental changes were injuries in upper cervical spine rather than lower. And most of the patients with quadriplegia or paraplegia were shown marked disruption of spinal canal

  14. Radiological evaluation of esophageal motility and gastroesophageal reflux disease

    International Nuclear Information System (INIS)

    Schima, W.; Pokieser, P.; Schober, E.

    1995-01-01

    Radiological evaluation of esophageal motility and the lower esophageal sphincter has gained increased attention in recent years. Videofluoroscopic investigation of esophageal motor function is superior to static film radiography, as repeated analysis of the videotaped recordings is possible. With emphasis on radiological techniques, normal esophagel physiology and motility and a variety of esophageal motor disorders are discussed in this review paper. Radiological evaluation of gastroesophageal reflux and reflux esophagitis is described. Clinical and radiological findings in esophageal motility disorders and gastroesophageal reflux disease and the radiological efficacy compared to that of manometry and pH-metry are discussed. (orig.) [de

  15. Radiological and scintigraphic evaluation of hip prostheses

    International Nuclear Information System (INIS)

    Bessler, W.; Schaub, W.

    1979-01-01

    The radiological findings following the introduction of hip prostheses are often equivocal. Additional bone scintigrams often provide important information for the evaluation of the prostheses. 1. An unstable hip prosthesis is characterised by abnormal uptake in bone, due to static and mechanical stress. 2. A positive scintigram does not necessarily indicate instability of the prosthesis. Increased uptake may also be due to inflammatory bone changes, healing, bone replacement, abnormal local stresses or soft tissue calcification. 3. In evaluating the scintigram one must take account not only of the intensity of isotope uptake, but also its distribution and exact localisation. 4. It is essential to compare the scintigram with the radiograph. Radiological features of possible instability become diagnostic if they correspond with appropriate increased radioactivity. If the latter is absent, the of instability remains doubtful. 5. In some cases early loosening of the stem of the prosthesis can be diagnosed while the radiograph is still negative. Increased radioactivity in the acetabulum is frequently seen in the presence of a stable acetabular prosthesis and must be interpreted with caution as a sign of loosening of the prosthesis. (orig.) [de

  16. Radiology

    International Nuclear Information System (INIS)

    Meyers, M.A.

    1989-01-01

    This paper reports on disease processes originating within the alimentary tract, may extend through the extraperitoneal spaces, and abnormalities primarily arising within other extraperitoneal sites may significantly affect the bowel. Symptoms and signs may be obscure, delayed, or nonspecific, and the area is generally not accessible to auscultation, palpation, or percussion. Radiologic evaluation thus plays a critical role

  17. [Evaluation of patient doses in interventional radiology].

    Science.gov (United States)

    Ropolo, R; Rampado, O; Isoardi, P; Gandini, G; Rabbia, C; Righi, D

    2001-01-01

    To verify the suitability of indicative quantities to evaluate the risk related to patient exposure, in abdominal and vascular interventional radiology, by the study of correlations between dosimetric quantities and other indicators. We performed in vivo measurements of entrance skin dose (ESD) and dose area product (DAP) during 48 procedures to evaluate the correlation among dosimetric quantities, and an estimation of spatial distribution of exposure and effective dose (E). To measure DAP we used a transmission ionization chamber and to evaluate ESD and its spatial distribution we used radiographic film packed in a single envelope and placed near the patient's skin. E was estimated by a calculation software using data from film digitalisation. From the data derived for measurements in 27 interventional procedures on 48 patients we obtained a DAP to E conversion factor of 0.15 mSv / Gy cm2, with an excellent correlation (r=.99). We also found a good correlation between DAP and exposure parameters such as fluoroscopy time and number of images. The greatest effective dose was evaluated for a multiple procedure in the hepatic region, with a DAP value of 425 Gy cm2. The greatest ESD was about 550 mGy. For groups of patients undergoing similar interventional procedures the correlation between ESD and DAP had conversion factors from 6 to 12 mGy Gy-1 cm-2. The evaluation of ESD and E by slow films represents a valid method for patient dosimetry in interventional radiology. The good correlation between DAP and fluoroscopy time and number of images confirm the suitability of these indicators as basic dosimetric information. All the ESD values found are lower than threshold doses for deterministic effects.

  18. Diagnosis of cystocele--the correlation between clinical and radiological evaluation.

    Science.gov (United States)

    Altman, Daniel; Mellgren, Anders; Kierkegaard, Jonas; Zetterström, Jan; Falconer, Christian; López, Annika

    2004-01-01

    In patients with genital prolapse involving several compartments simultaneously, radiologic investigation can be used to complement the clinical assessment. Contrast medium in the urinary bladder enables visualization of the bladder base at cystodefecoperitoneography (CDP). The aim of the present study was to evaluate the correlation between clinical examination using the Pelvic Organ Prolapse Quantification system (POP-Q) and CDP. Thirty-three women underwent clinical assessment and CDP. Statistical analysis using Pearson's correlation coefficient ( r) demonstrated a wide variability between the current definition of cystocele at CDP and POP-Q ( r=0.67). An attempt to provide an alternative definition of cystocele at CDP had a similar outcome ( r=0.63). The present study demonstrates a moderate correlation between clinical and radiologic findings in patients with anterior vaginal wall prolapse. It does not support the use of bladder contrast at radiologic investigation in the routine preoperative assessment of patients with genital prolapse.

  19. Evaluating the use of preoperative antibiotics in pediatric orthopaedic surgery.

    Science.gov (United States)

    Formaini, Nathan; Jacob, Paul; Willis, Leisel; Kean, John R

    2012-01-01

    To evaluate the rate of infection after minimally invasive procedures on a consecutive series of pediatric orthopaedic patients. We hypothesized that the use of preoperative antibiotics for minimally invasive pediatric orthopaedic procedures does not significantly reduce the incidence of surgical site infection requiring surgical debridement within 30 days of the primary procedure. We retrospectively reviewed 2330 patients having undergone minimally invasive orthopaedic procedures at our institution between March 2008 and November 2010. Knee arthroscopy, closed reduction with percutaneous fixation, soft tissue releases, excision of bony or soft-tissue masses, and removal of hardware constituted the vast majority of included procedures. Two groups, based on whether prophylactic antibiotics were administered before surgery, were created and the incidence of a repeat procedure required for deep infection was recorded. Statistical analysis was performed to determine significance, if any, between the 2 groups. Chart review of the 2330 patients identified 1087 as having received preoperative antibiotics, whereas the remaining 1243 patients did not receive antibiotics before surgery. Only 1 patient out of the 1243 cases in which antibiotics were not given required additional surgery within 30 days of the primary procedure due to a complicated surgical site infection (an incidence of 0.0008%). No patients in the antibiotic group developed a postoperative infection within 30 days requiring a return to the operating room for management. Our data revealed no significant increase in the incidence of complicated infection requiring additional procedures when antibiotics were not administered before surgery. Though prophylactic antibiotics have been shown to confer numerous benefits for patients undergoing relatively major operations, their use in cases of minimally invasive and/or percutaneous orthopaedic surgery is not well defined. Our data suggest that the use of

  20. Preoperative evaluation of the abdominal aortic aneurysm using spiral CT

    International Nuclear Information System (INIS)

    Chisuwa, Hisanao; Nishimaki, Keiji; Arai, Masayuki; Honda, Haruyasu; Urata, Koichi; Miyagawa, Yusuke; Makuuchi, Masatoshi; Shimizu, Mikio; Okamoto, Kohei.

    1995-01-01

    Six patients with abdominal aortic aneurysm (AAA) were studied with three-dimensionally reconstructed CT angiography (3D-CTA) in order to evaluate its usefulness as a diagnostic tool for vascular surgery patients. Images of the intravenously contrasted abdominal aorta were obtained with spiral scan during a single breath hold. The images of the abdominal aorta and its major branches were three-dimensionally reconstructed with a shaded surface display mode. The three-dimensional image reconstruction was successful in all the six cases and performed without difficulties. Shaded surface display presented a deficit to depict the aortic wall with mural thrombus. However, multidirectional display of the abdominal aorta and its branches facilitated interpretation of the anatomical details of the lesions and planning of surgical repair. 3D-CTA is an alternative to conventional aortography for preoperative diagnosis of AAA. Moreover it was shown to be noninvasive, easy to proceed. It presented good angiographical resolution that can be used as a precise diagnostic tool in vascular surgery. (author)

  1. Varicography in the preoperative evaluation of primary varicose veins

    International Nuclear Information System (INIS)

    Pinzani, A.; Paoli, G.; Gongolo, A.; Spreafico, G.

    1989-01-01

    Primary varicose veins in the lower limb are usually well evaluated by the surgeon, who avails himself of tornequet tests and Doppler US. However, the operation is often followed by failure or recurrence, or else it requires ugly skin dissection to eradicate an unforeseeably complicated varicose vein. The authors suggest that, whenever the surgeon considers the information obtained with tests and Doppler US inadequate for planning surgery, varicography be performed to get further morphological (and functional) data about the origin of varicose veins, which is of fundamental importance for an accurate surgical planning (crossectomy, stripping, ligation, sclerosis). Out of 100 varicographies consecutively carried out on patients in whom clinical examination was not conclusive, 62% allowed an already planned surgical approach to be changed. The figure rose to 100% in the case of unusual varicose veins. Such a results allowed the needs of both the surgeon (selectivity, effectiveness, radicality) and the patients (narrow scars, absence of relapse) to be respected. Furthermore, it has been pointed out that some vein segments are often only pathological, and they are to be adequately treated, while others can be undamaged, and they are to be preserved for both their function and an eventual by-pass surgery. Varicography is rapidly performed, without complication, and is well accepted by the patients. It is a fundamental help in the preoperative study of primary varicose veins, especially in case of unusual ones, whenever the surgeon is in the slightest diagnostic - and therefore surgical - doubt

  2. Preoperative MRI evaluation of vertebral hemangiomas treated with percutaneous vertebroplasty

    International Nuclear Information System (INIS)

    Liu Xiaoping; Wu Chungen; Li Minghua; Li Yuehua; Gu Yifeng; Cheng Yongde

    2012-01-01

    Objective: To discuss the clinical value of preoperative magnetic resonance imaging examination in guiding the treatment of vertebral hemangiomas with percutaneous vertebroplasty (PVP). Methods: A total of 286 patients with vertebral hemangiomas detected on spine MRI in authors' Department were enrolled in this study. The patient's age, the lesion's size and location, the clinical symptoms, MRI findings, etc. were retrospectively analyzed. Results: A total of 336 vertebral bodies were affected in 286 patients. The lesions were mainly located at the lumbar spine (43.15%) and the thoracic spine (37.80%). The highest incidence of disease was seen in 50-59 years old patients (34.62%). The mean diameter of the lesions was 14.56 mm. Solitary lesion was seen in 85.66% of patients, while two vertebral bodies involved were seen in 10.14% of patients. Twelve cases (4.20%) simply presented as back pain at the related vertebral bodies. Two patients showed signs due to spinal cord compression. All aggressive vertebral hemangiomas were manifested as iso-lower signal on T1-weighted images and higher signal on T2-weighted images. Simple PVP was performed in 4 cases, and subtotal tumor excision together with PVP was carried out in two patients with aggressive vertebral hemangiomas. Conclusion: Evaluation of vertebral hemangiomas with MRI performed prior to percutaneous vertebroplasty is very helpful in guiding the selection of therapeutic scheme. (authors)

  3. Preoperative computer tomography evaluation in transcatheter aortic valve replacement (TAVI)

    International Nuclear Information System (INIS)

    Groudeva, V.; Stoynova, V.; Trendafilova, D.; Dzhorgova, Y.; Nachev, G.

    2014-01-01

    Transcatheter aortic valve replacement is rapidly emerging technique alternative to surgery in high risk patients. Imaging and especially computer tomography is important in preoperative assessment of the aortic ring and the prosthetic valve choice. The aim of this study is to share authors initial experience in CT assessment of the aortic ring prior to Transcatheter aortic valve replacement. 49 patients (mean age 76,55) underwent 320 rows MDCT (Acquilon One) prior TAVI. Protocol involved scanning from thoracic inlet to common femoral arteries. Aortic root size, aortic diameter at the level of coronary sinuses and the sinotubular junction and distance to coronary ostia were evaluated on a Vitrea work station. MDCT established maximal aortic ring diameter from 18 to 31 mm mean 25,04 mm while the lesser rate was from 16 to 21 mm. Accordingly positioned prostheses were in 34,75% No. 23, in 49% - No. 26 and in16,3% - No. 29. MDCT is crucial in aortic valve assessment prior to TAVI in experienced hands and multidisciplinary team. (authors) Key words: TRANSCATHETER AORTIC VALVE REPLACEMENT (TAVI). MDCT AORTIC VALVE ASSESSMENT

  4. Evaluation in Radiology as a pedagogic contribution

    International Nuclear Information System (INIS)

    Ros Mendoza, L. H.

    2012-01-01

    After defining evaluation (a systematic process of data collection and analysis in order to take decisions in a specific field; in our case, radiology training at medical school), we should specify the characteristics of such evaluation, which include the aim (what for?), subject-matter (which content?), benchmarks (i.e., the standards against which we are comparing), when to evaluate, and how strictly or at what cost. Once these questions have been answered, we are able to select the most appropriate procedures for evaluation, bearing in mind that evaluation is a process, while grading implies an already made decision. There are different types of evaluation: the initial evaluation, which is not necessarily nominal, is performed to define the student’s level at the beginning of the course; the normative or norm-referenced evaluation has a relative nature, as it compares student achievement to that of others; and the absolute or criterion-referenced evaluation, which is based on established criteria, where the goals which should be achieved become the key element for designing teaching and evaluation. Evaluation may be used to generate motivation. This requires the establishment of clear and relevant objectives as well as knowledge on how to correct mistakes. Oral questions in the classroom may also be motivating. Within the triple domain to be taken into account (cognitive, affective and psychomotor), the objectives to be measured should be considered in a hierarchical order from simple to complex: necessary knowledge, comprehension of such concepts, practical application (in a context that is different from that where knowledge has been gained), and the so-called “superior operations” (analysis, synthesis and grading). Then, the technical features of evaluation will be defined: internal and external validity in relation to difficulty and discrimination; reliability, i.e. accuracy and consistency according to the degree of objectivity; and finally

  5. Long-Term Survival According to Histology and Radiologic Response to Preoperative Chemotherapy in 126 Patients Undergoing Resection of Non-GIST Sarcoma Liver Metastases.

    Science.gov (United States)

    Goumard, Claire; Marcal, Leonardo P; Wang, Wei-Lien; Somaiah, Neeta; Okuno, Masayuki; Roland, Christina L; Tzeng, Ching-Wei D; Chun, Yun Shin; Feig, Barry W; Vauthey, Jean-Nicolas; Conrad, Claudius

    2018-01-01

    Non-gastrointestinal stromal tumor sarcomas (NGSs) have heterogeneous histology, and this heterogeneity may lead to uncertainty regarding the prognosis of patients with liver metastases from NGS (NGSLM) and decision regarding their surgical management. Furthermore, the role of preoperative chemotherapy in treatment of NGSLM remains poorly defined. We investigated long-term survival and its correlation to response to preoperative chemotherapy in patients with NGSLM. Patients who underwent liver resection for NGSLM during 1998-2015 were identified. Clinical, histopathologic, and survival data were analyzed. Multivariate analysis was performed using a Cox proportional hazards model. 126 patients [62 (49%) with leiomyosarcoma] were included. Five-year overall survival (OS) and recurrence-free survival (RFS) rates were 49.3 and 14.9%, respectively. Survival did not differ by histologic subtype, primary tumor location, or use of preoperative or postoperative chemotherapy. NGSLM ≥ 10 cm and extrahepatic metastases at NGSLM diagnosis were the only independent risk factors for OS. In the 83 (66%) patients with metachronous NSGLM, disease-free interval > 6 months was associated with improved OS and RFS. Among the 65 patients (52%) who received preoperative chemotherapy, radiologic response according to Choi criteria specifically was associated with improved OS (p = 0.04), but radiologic response according to RECIST 1.1 criteria was not. Resection of NGSLM led to a 5-year OS rate of 49%, independent of histologic subtype and primary tumor location. Choi criteria (which take into account tumor density) are superior to RECIST 1.1 in assessing radiologic response and should be used to assess response to preoperative chemotherapy.

  6. Surgeons’ views on preoperative medical evaluation: a qualitative study

    Directory of Open Access Journals (Sweden)

    Kevin R. Riggs

    2017-10-01

    Full Text Available Abstract Background There is substantial variation in the practice of preoperative medical evaluation (PME and limited evidence for its benefit, which raises concerns about overuse. Surgeons have a unique role in this multidisciplinary practice. The objective of this qualitative study was to explore surgeons’ practices and their beliefs about PME. Methods We conducted of semi-structured interviews with 18 surgeons in Baltimore, Maryland. Surgeons were purposively sampled to maximize diversity in terms of practice type (academic vs. private practice, surgical specialty, gender, and experience level. General topics included surgeons’ current PME practices, perceived benefits and harms of PME, the surgical risk assessment, and potential improvements and barriers to change. Interviews were audio-recorded and transcribed. Transcripts were analyzed using content analysis to identify themes, which are presented as assertions. Transcripts were re-analyzed to identify supporting and opposing instances of each assertion. Results A total of 15 themes emerged. There was wide variation in surgeons’ described PME practices. Surgeons believed that PME improves surgical outcomes, but not all patients benefit. Surgeons were cognizant of the financial cost of the current system and the potential inconvenience that additional tests and office visits pose to patients. Surgeons believed that PME has minimal to no risk and that a normal PME is reassuring to them and patients. Surgeons were confident in their ability to assess surgical risk, and risk assessment by non-surgeons rarely affected their surgical decision-making. Hospital and anesthesiology requirements were a major driver of surgeons’ PME practices. Surgeons did not receive much training on PME but perceived their practices to be similar to their colleagues. Surgeons believed that PME provides malpractice protection, welcomed standardization, and perceived there to be inadequate evidence to

  7. Radiology

    International Nuclear Information System (INIS)

    Bigot, J.M.; Moreau, J.F.; Nahum, H.; Bellet, M.

    1990-01-01

    The 17th International Congress of Radiology was conducted in two separate scientific sessions, one for radiodiagnosis and one for radiation oncology. Topics covered are: Radiobiology -radioprotection; imaging and data processing; contrast media; MRI; nuclear medicine; radiology and disasters; radiology of tropical diseases; cardiovascular radiology; interventional radiology; imaging of trauma; imaging of chest, gastro-intestinal tract, breast and genito-urinary tract; imaging in gynecology;imaging in oncology; bone and joint radiology; head and neck-radiology; neuro-radiology. (H.W.). refs.; fig.; tabs

  8. Evaluating the effect of preoperative oral gabapentin on

    African Journals Online (AJOL)

    2010-05-02

    May 2, 2010 ... Conclusion: Preoperative gabapentin, when administered one hour prior to surgery in a dose of 1 200 mg, decreases postoperative pain scores at ... and impending tissue damage. Acute pain accompanies almost all surgical procedures. .... consumption after mastectomy. Anesthesiology 2002;97:560–4. 8.

  9. Pancreatic transplantation: Radiologic evaluation of vascular complications

    International Nuclear Information System (INIS)

    Snider, J.F.; Hunter, D.W.; Kuni, C.C.; Castaneda-Zuniga, W.R.; Letourneau, J.G.

    1991-01-01

    Transplantation of the pancreas is an increasingly common therapeutic option for preventing or delaying complications of type I diabetes mellitus. The authors studied the relative roles of various radiologic examinations in diagnosing vascular complications in these grafts including arterial and venous thrombosis, stenosis, and anastomotic leak (the most common vascular factors that necessitate pancreatectomy of the transplant), as defined with pathologic or arteriographic data. The results of 78 scintigraphic flow studies, 40 abdominal and pelvic computed tomographic (CT) scans, 27 sonograms, and eight color Doppler studies were evaluated in 52 patients who received a total of 27 cadaveric and 26 living-donor grafts over a 12-year period. These results were correlated with the data from 45 gross and microscopic pathologic studies and 37 arteriograms to determine their relative value in enabling detection of graft thrombosis and other vascular complications. Scintigraphy, CT, sonography, and color Doppler were all sensitive in detection of generalized graft abnormalities but lacked specificity in defining the underlying etiologic factors

  10. Pancreatic transplantation: Radiologic evaluation of vascular complications

    Energy Technology Data Exchange (ETDEWEB)

    Snider, J.F.; Hunter, D.W.; Kuni, C.C.; Castaneda-Zuniga, W.R.; Letourneau, J.G. (Univ. of Minnesota Hospital and Clinic, Minneapolis (USA))

    1991-03-01

    Transplantation of the pancreas is an increasingly common therapeutic option for preventing or delaying complications of type I diabetes mellitus. The authors studied the relative roles of various radiologic examinations in diagnosing vascular complications in these grafts including arterial and venous thrombosis, stenosis, and anastomotic leak (the most common vascular factors that necessitate pancreatectomy of the transplant), as defined with pathologic or arteriographic data. The results of 78 scintigraphic flow studies, 40 abdominal and pelvic computed tomographic (CT) scans, 27 sonograms, and eight color Doppler studies were evaluated in 52 patients who received a total of 27 cadaveric and 26 living-donor grafts over a 12-year period. These results were correlated with the data from 45 gross and microscopic pathologic studies and 37 arteriograms to determine their relative value in enabling detection of graft thrombosis and other vascular complications. Scintigraphy, CT, sonography, and color Doppler were all sensitive in detection of generalized graft abnormalities but lacked specificity in defining the underlying etiologic factors.

  11. Preoperative CT evaluation of adenocarcinoma of the gastroesophageal junction

    International Nuclear Information System (INIS)

    Bennett, J.D.; Lefcoe, M.S.; Finley, R.; Yoshi, C.; Inculet, R.

    1988-01-01

    A retrospective review was undertaken of 53 preoperative computed tomographic (CT) scans obtained between March 1983 and April 1988 from patients undergoing surgery for adenocarcinoma of the gastroesophageal junction, and results were correlated with the surgical-pathologic findings. CT was unreliable in predicting aortic, pericardial, or pancreatic invasion (sensitivity, 0/8; specificity, 41/45). Of 45 pathologically positive nodal groups, the largest node measured on CT scans was 10 mm or less in 36 cases. The accuracy of preoperative CT in staging adenocarcinoma of the gastroesophageal junction is limited by its low sensitivity in detecting local invasion. Nodal size as measured with CT is not a reliable indicator of metastatic disease

  12. Evaluation of preoperative predictive values of serum CA15-3 and ...

    African Journals Online (AJOL)

    Evaluation of preoperative predictive values of serum CA15-3 and CEA within Sudanese ... Sudan Journal of Medical Sciences ... Design and setting: This case control study was conducted in Khartoum Teaching Hospital, Khartoum, Sudan.

  13. Evidence-based radiology: a new approach to evaluate the clinical practice of radiology

    International Nuclear Information System (INIS)

    Puig, S.; Felder-Puig, R.

    2006-01-01

    Over the last several years, the concept and methodology of evidence-based medicine (EBM) have received significant attention in the scientific community. However, compared to therapeutic medical disciplines, EBM-based radiological publications are still underrepresented. This article summarizes the principles of EBM and discusses the possibilities of their application in radiology. The presented topics include the critical appraisal of studies on the basis on EBM principles, the explanation of EBM-relevant statistical outcome parameters (e.g., ''likelihood ratio'' for diagnostic and ''number needed to treat'' for interventional procedures), as well as the problems facing evidence-based radiology. Evidence-based evaluation of radiological procedures does not only address aspects of cost-effectiveness, but is also particularly helpful in identifying patient-specific usefulness. Therefore it should become an integral part of radiologist training. (orig.)

  14. Independent auto evaluation of an operative radiological protection program

    International Nuclear Information System (INIS)

    Medrano L, M.A.; Rodriguez C, C.C.; Linares R, D.; Zarate M, N.; Zempoalteca B, R.

    2006-01-01

    The program of operative radiological protection of a nuclear power plant consists of multiple procedures and associate tasks that have as purpose the radiological protection of the workers of the power station. It is for this reason that the constant evaluation of the one it programs it is an important tool in the identification of their weaknesses (and strengths), so they can be assisted appropriately. In this work the main elements of the program of independent auto evaluation of the program of operative radiological protection of the Laguna Verde Central that has been developed and implemented by the National Institute of Nuclear Research are described. (Author)

  15. Radiology

    International Nuclear Information System (INIS)

    Edholm, P.R.

    1990-01-01

    This is a report describing diagnostic techniques used in radiology. It describes the equipment necessary for, and the operation of a radiological department. Also is described the standard methods used in radiodiagnosis. (K.A.E.)

  16. User questionnaire to evaluate the radiological workspace

    NARCIS (Netherlands)

    van Ooijen, Peter M. A.; Koesoema, Allya P.; Oudkerk, Matthijs

    2006-01-01

    Over the past few years, an increase in digitalization of radiology departments can be seen, which has a large impact on the work of the radiologists. This impact is not only demonstrated by the increased use of digital images but also by changing demands on the whole reading environment. In this

  17. Evaluation of radiological medical practice during night duty

    International Nuclear Information System (INIS)

    Tasu, J.P.; Rocher, L.; Miquel, A.; Rondeau, Y.; Blery, M.; Nguyen, D.T.; Spira, A.; Livartowski, J.; Ellrodt, A.

    2000-01-01

    To evaluate the radiological activity during night duty, in a University Hospital, during 100 days, the radiological activity has been evaluated from examinations requiring radiologist (including US and CT, special X-ray examinations). The urgent nature and the agreement between the suspected disease and the final diagnose have been compared with the level of the clinician (medical student, resident, senior). 981 radiological examinations were performed on an emergency basis. In 39%, the examination was urgent or very urgent and for 61% little urgent or non-urgent. The level of the clinician was correlated with the degree of emergency evaluated by the radiologist and with the agreement between suspected disease and the final diagnose (p<0.0001). During night duty, the medical activity in radiology is not justified only be emergency, but also the continuous hospital activities. Better formation of the physician is required to limit the number of examinations. (authors)

  18. Radiological evaluation of swallowing and clinical patterns of systemic sclerosis

    International Nuclear Information System (INIS)

    Montesi, A.; Pesaresi, A.; Cavalli, M.L.; Serri, L.; Salmistraro, D.; Candela, M.; Gabrielli, A.

    1990-01-01

    Fifty-one patients with systemic sclerosis (scleroderma) were studied by means of videofluoroscopy in order to evaluate the abnormalities in the oral-pharyngeal and esophageal phases of deglutition and to correlate the radiological patterns with the clinical features of the disease. Thirteen patients (25.5%) exhibited swallowing disorders such as oral leakage, retention, penetration, mild or moderate aspiration and abnormal upper esophageal sphincter behavior. These dysfunctions were more evident in patients with esophageal motility abnormalities. A normal radiological pattern in the esophagus was not associated with swallowing alterations. Remarkably, patients with oral-pharyngeal disorders had a higher incidence of lung diseases. Forty-five patients (88%) exhibited disorders of the esophageal phase of deglutition, such as mild or severe motility abnormalities or hiatal hernia, gastro-esophageal reflux, reflux esophagitis, and stricture. Radiological findings in the esophagus can be abnormal in the early stages of the disease. On the other hand, the radiological pattern of esophageal motility can be occasionally negative in advanced or extensive disease. This indicates a discrepancy between clinical symptoms and radiological picture of the esophagus. The radiological examination of the oral-pharyngeal and esophageal phases of deglutition is important in patients with scleroderma in order to evaluate visceral involvement, motility disorders, and risk of aspiration. Such radiological information can be useful in preventing esophagitis and pulmonary complications

  19. Ultrasound and MR-imaging in preoperative evaluation of two rare cases of scar endometriosis

    OpenAIRE

    Pados, George; Tympanidis, John; Zafrakas, Menelaos; Athanatos, Dimitrios; Bontis, John N

    2008-01-01

    Scar or incisional endometriosis is a rare, often misdiagnosed, pathologic condition of the abdominal wall. Two cases of incisional endometriosis are presented. Both patients presented with atypical cyclic pain and palpable nodules on scars of previous cesarean sections. In both cases, the mass was totally excised, after accurate preoperative evaluation with 2-D ultrasound, power Doppler and MRI. Microscopic examination confirmed the preoperatively presumed diagnosis of cutaneous endometriosi...

  20. Evaluation criteria for emergency response plans in radiological transportation

    International Nuclear Information System (INIS)

    Lindell, M.K.; Perry, R.W.

    1980-01-01

    This paper identifies a set of general criteria which can be used as guides for evaluating emergency response plans prepared in connection with the transportation of radiological materials. The development of criteria takes the form of examining the meaning and role of emergency plans in general, reviewing the process as it is used in connection with natural disasters and other nonnuclear disasters, and explicitly considering unique aspects of the radiological transportation setting. Eight areas of critical importance for such response plans are isolated: notification procedures; accident assessment; public information; protection of the public at risk; other protective responses; radiological exposure control; responsibility for planning and operations; and emergency response training and exercises. (Auth.)

  1. Magnetic resonance cisternography for preoperative evaluation of arachnoid cysts

    Energy Technology Data Exchange (ETDEWEB)

    Awaji, M. [Niigata University, Department of Radiology, Faculty of Medicine, Niigata (Japan); Okamoto, K. [Niigata University, Center for Integrated Human Brain Science, Brain Research Institute, Niigata (Japan); Nishiyama, K. [Niigata University, Department of Neurosurgery, Brain Research Institute, Niigata (Japan)

    2007-09-15

    With a high likelihood of clinical improvement and low rates of complications, minimally invasive neuroendoscopic surgery is becoming the treatment of choice for symptomatic or growing arachnoid cysts. In neuroendoscopic surgery, visualization of anatomical landmarks is essential in achieving successful fenestration without complications. Because of the restricted visual field in neuroendoscopic surgery, preoperative anatomical assessment is very helpful. Magnetic resonance cisternography (MRC) with high spatial resolution and contrast, using for example 3-D Fourier transformation constructive interference in steady state (CISS) or fast imaging employing steady-state acquisition (FIESTA) sequences, is able to detect the arachnoid cyst wall and neighboring anatomical structures as the anatomical landmarks. We retrospectively reviewed T2-weighted (T2-W) fast spin-echo images, and the MRC and intraoperative findings. Axial and coronal T2-W images (6 and 3 mm thickness, respectively) and axial and coronal 0.8 mm thick MRC images with CISS or FIESTA were obtained from four patients with arachnoid cysts treated by neuroendoscopic surgery. Intraoperative findings were reviewed on videotape recorded during the procedures. At the brain surface, the arachnoid cyst wall could be detected clearly in any of the four patients on MRC images, and was only partly seen in the fourth patient T2-W images. Adjacent important anatomical structures including vessels and cranial nerves, and an enough space for cystocisternostomy were identified on MRC images, and the findings were consistent with the findings during neuroendoscopic surgery. Preoperative identification of the arachnoid cyst wall and surrounding anatomical structures by MRC may help avoid complications and allow safer neuroendoscopic surgery. (orig.)

  2. Radiological safety evaluation report for NUWAX-79 exercise

    International Nuclear Information System (INIS)

    King, W.C.

    1979-03-01

    An analysis of the radiological safety of the NUWAX-79 exercise to be conducted on the Nevada Test Site in April 1979 is given. An evaluation of the radiological safety to the participants is made using depleted uranium (D-38) in mock weapons parts, and 223 Ra and its daughters as a radioactive contaminant of equipment and terrain. The radiological impact to offsite persons is also discussed, particularly for people living at Lathrop Wells, Nevada, which is located 7 miles south of the site proposed for the exercise. It is the conclusion of this evaluation that the potential radiological risk of this exercise is very low, and that no individual should receive exposure to radioactivity greater than one-tenth of the level permitted under current federal radiation exposure guidelines

  3. Test objects for evaluating the performance of radiological imaging systems. Leeds radiological test objects

    International Nuclear Information System (INIS)

    Cowen, A.R.; Clarke, O.F.; Haywood, J.M.; Parker, R.P.

    1985-01-01

    A range of test objects has been developed to assess the imaging performance of conventional and digital radiological imaging systems. These test objects have arisen as a result of involvement in both the laboratory evaluation of radiological imaging systems and the routine maintenance of such equipment in a large diagnostic radiology department. The philosophy behind the design and application of the test objects is briefly described. Particular attention is paid to the advantages of using the threshold-contrast detail-detectability technique to assess overall imaging performance. The great importance of ensuring optimum imaging performance prior to clinical acceptance is stressed. A strategy for implementing the test objects in a clinical department is present. The diagnostic information content of the clinical images which result measures the success of the quality control procedure adopted. (author)

  4. Radiological evaluation of painful total hip replacement

    International Nuclear Information System (INIS)

    Tehranzadeh, J.; Schneider, R.; Freiberger, R.H.

    1981-01-01

    Ninety-four cases of clinically failed, cemented, total hip prostheses requiring surgery were reviewed to determine the accuracy of preoperative plain radiography, culture of aspirated fluid, arthrography, and bone scanning. When radiopaque cement had been used to embed the prosthesis, plain radiography was highly accurate in detecting a loose femoral component, less so in detecting a loose acetabular component. Culture of aspirated fluid was accurate in diagnosing infection. A positive arthrogram identified loosening with good accuracy; however, a negative arthrogram did not reliably exclude loosening. 99 mTc bone scans frequently differentiated loosening from loosening with infection. The suggested sequence of diagnostic tests is plain radiography followed by bone scanning. If the bone scan shows diffuse augmented uptake, culture of aspirated fluid followed by arthrography is indicated

  5. Preoperative MR angiography evaluation of transjugular intrahepatic portosystemic shunt

    International Nuclear Information System (INIS)

    Guo Li; Yang Dakuan; Yuan Shuguang; Yan Dong; Wang Jiaping; Li Yingchun

    2010-01-01

    Objective: To discuss the application of MR angiography (MRA) in deciding the puncture points of transjugular intrahepatic portosystemic shunt (TIPS). Methods: Preoperative MRA was performed in 59 patients with portal hypertension (study group) in order to search for the causes of portal hypertension, to observe the patterns and route of the hepatic and portal veins and to measure the vascular diameter at the scheduled puncture site. MRA was also performed in 50 healthy subjects, which was served as the control group. The results were compared between two groups. Results: The diseases in the study group included simple cirrhosis (n=49), cirrhosis accompanied with hepatocellular carcinoma (n=4), pure portal vein thrombosis (n=3), splenic vein stenosis (n=1) and Budd-Chiari syndrome (n=2). In study group the type I, II and III of the hepatic vein classification were seen in 14, 39 and 12 cases respectively,while in control group in 12, 34 and 14 cases respectively. In study group, the right, middle and left hepatic vein which had the diameter larger enough for puncturing existed in 52, 40 and 28 cases respectively, while in control group in 46, 34 and 23 cases respectively. The safe point for puncture via the right and the left branch of the portal vein was located beyond the distance of (16.2 ± 3.1) mm and (14.2 ± 3.8) mm respectively. Conclusion: MRA is a valuable non-invasive examination, which is of great value in determining the causes of portal hypertension and in planning the puncturing sites before performing TIPS. (authors)

  6. Dosimetric evaluation program for dental radiology practices

    International Nuclear Information System (INIS)

    Gregori, B.; Milat, J.; Fernandez, J.; Micinquevich, S.; Andrieu, J.

    1992-01-01

    The preliminary results of a program undertaken to estimate the doses to patients associated with dental radiology practices in Argentine, are presented. Information collected from the search demonstrated that the Dieck and coronal techniques are the most commonly used practices, while all the examinations are performed by using a circular collimator. For both practices, the dosimetric studies were carried out on a Rando Alderson phantom. All dose measurements were made using thermoluminescent detectors LiF and Ca 2 F. In addition, a mathematical model was developed by applying the Monte Carlo method to a MIRD-V phantom. Circular and rectangular collimators were used. Absorbed dose distribution on head and neck, as well as surface dose distribution, were estimated. The comparison of the performance of both collimators shows that the use of the rectangular one allows for a dose reduction of 80%. Besides, a good correlation between the physical and mathematical models applied was found. (author)

  7. Radiologic evaluation of spinal epidural mass

    International Nuclear Information System (INIS)

    Lee, Ho Kyu; Lee, Moon Kyu; Chang, Kee Hyun

    1987-01-01

    It is often difficult to differentiate each pathologic entity among various spinal epidural masses on the radiologic basis. We retrospectively analysed radiologic findings of 67 cases of pathologically proven spinal epidural mass to find out any specific findings of each epidural mass. The results are as follows : 1. Of 67 cases, metastasis (16 cases), epidural abscess (15 cases), neurogenic tumor (16 cases) and meningioma (8 cases) are most common. The others consist of epidural angioma (3 cases), vertebral hemangioma (2 cases), chondrosarcoma (2 cases), fibrosarcoma (1 case), eosinophilic granuloma (1 case), lymphoma (1 case), lipoma (1 case) and lymphoid hyperplasia (1 case). 2. Destruction of the adjacent bone was commonly associated with the epidural mass in metastasis (75%) and epidural abscess (67%). It was also noted in 2 cases of chondrosarcoma, 1 fibrosarcoma and 1 eosinophilic granuloma. 3. Pressure erosion of adjacent bone was demonstrated in neurogenic tumor (75%) and meningioma (25%). 4. Narrowing of intervertebral space was seen in only 27% of epidural abscess. 5. The paraspinal tumor was associated in 67% of metastasis, 80% of epidural abscess, 75% of neurogenic tumor, 33% of meningioma. It was also seen in 2 cases of chondrosarcoma, 1 fibrosarcoma and 1 eosinophilic granuloma. 6. The intradural tumor was associated in 50% of neurogenic tumor and 67% of meningioma. 7. On axial CT image, most of the epidural mass shows eccentric location with displacing dural sac to the opposite side. The diseases that occasionally show encircling location are metastasis, epidural abscess, vertebral hemangioma, chondrosarcoma, eosinophilic granuloma, and lymphoma. Neurogenic tumor only shows multicentric location. 8. The disease extent more than height of one vertebral body was seen in 80% of epidural abscess, 58% of neurogenic tumor, 100% of epidural angioma. It was also seen in 2 cases of chondrosarcoma, 1 fibrosarcoma, 1 eosinophilic granuloma, 1 lymphoma, 1

  8. The Evaluation of Anxiety Levels and Determinant Factors in Preoperative Patients

    Directory of Open Access Journals (Sweden)

    Banu Cevik

    2018-01-01

    Full Text Available Objective: Preoperative anxiety is a prevalent concern with negative effects on perioperative period but is usually ignored. The objectives of this study are to identify the preoperative anxiety levels of surgical patients and to evaluate the associated factors affecting this level. Methods: One hundred volunteer patients scheduled for elective surgery were included the study. Data were collected by using “Personal Information Form “and “State-Trait Anxiety Inventory-I”. Evaluations were based on a significance level of p<0.05. Results: The percentage of female to male patients was 48% and 52%. The mean anxiety levels of both gender were 42.46 ± 8.95 and 42.10 ± 9.49 respectively (p=0.85. There was no difference between females and males in terms of anxiety. Age, occupational condition, marital status, and education level was not found as determinant factors on preoperative anxiety levels. Male individuals of large families were more anxious than the others, but this difference was not significant (p=0.11. Previous surgical experience was not a predictive factor for preoperative anxiety. The anxiety level was significantly high in men using cigarette and alcohol (p<0.01. Fear, apprehension, and stress was highly related with high level of anxiety, but insecurity and inexperience were not a predicting factor. The anxiety levels of cool patients were significantly lower than the others (p<0.01. Conclusions: Preoperative anxiety is a multifactorial issue and must be good handled. The aim must be based on reduction strategies. It must be considered that preoperative information is the best way to decrease preoperative anxiety.

  9. Radiological Evaluation Standards in the Radiology Department of Shahid Beheshti Hospital (RAH YASUJ Based on Radiology standards in 92

    Directory of Open Access Journals (Sweden)

    A َKalantari

    2014-08-01

    Full Text Available Background & aim: Radiology personnel’s working in terms of performance and safety is one of the most important functions in order to increase the quality and quantity. This study aimed to evaluate the radiological standards in Shahid Beheshti Hospital of Yasuj, Iran, in 2013. Methods: The present cross-sectional study was based on a 118 randomly selected graphs and the ranking list, with full knowledge of the standards in radiology was performed two times. Data were analyzed using descriptive statistics. Results: 87.3% of the students chose the cassette, 76.3%, patients chose the position, 87.3%, member state, the central ray 83.9%, and the distance between the tube and the patient 68.6% had been operated in accordance with the standards practice. Among all the factors and variables, between view with cassette, view with SID, sex with position patients, grid with central ray, grid with SID, Request with positioning the patient and between density with patient position and member position significant relationship were observed p<0.05 . Conclusions: Staff and students in terms of performance were at high levels, but in the levels of protection were in poor condition. Therefore, in order to promote their conservation, education and periodical monitoring should be carried out continuously.

  10. Dipyridamole-thallium scanning in patients undergoing vascular surgery. Optimizing preoperative evaluation of cardiac risk

    International Nuclear Information System (INIS)

    Eagle, K.A.; Singer, D.E.; Brewster, D.C.; Darling, R.C.; Mulley, A.G.; Boucher, C.A.

    1987-01-01

    Dipyridamole-thallium imaging has been suggested as a method of preoperatively assessing cardiac risk in patients undergoing major surgery. To define more clearly its proper role in preoperative assessment, we prospectively evaluated 111 patients undergoing vascular surgery. In the first set of 61 patients, our data confirmed the value of preoperative dipyridamole-thallium scanning in identifying the patients who suffered postoperative ischemic events. Events occurred in eight of 18 patients with reversible defects on preoperative imaging, compared with no events in 43 patients with no thallium redistribution (confidence interval for the risk difference: 0.624, 0.256). The results also suggested that clinical factors might allow identification of a low-risk subset of patients. To test the hypothesis that patients with no evidence of congestive heart failure, angina, prior myocardial infarction, or diabetes do not require further preoperative testing, we evaluated an additional 50 patients having vascular procedures. None of the 23 without the clinical markers had untoward outcomes, while ten of 27 patients with one or more of these clinical markers suffered postoperative ischemic events (confidence interval for the risk difference: 0.592, 0.148). In the clinical high-risk subset, further risk stratification is achieved with dipyridamole-thallium scanning

  11. Evaluation of the conditions and practices of radiological protection technicians in radiology, according to Ordinance 453

    International Nuclear Information System (INIS)

    Costa, Rogerio Ferreira da

    2013-01-01

    Professionals in radiology suffer whole body exposure to low doses for long periods . The system of radiological protection should keep exposures below recommended thresholds, thus avoiding the stochastic effects that can be triggered with any dose level value, and there is not a threshold for induction of the same. Therefore it is important to use personal dosimeter for monitoring doses and protective equipment. The increase in procedures using ionizing radiation in recent years has been noted with concern, since many companies are not complying with the standards of protection. This is because some procedures may be performed without the need of surgery, which presents a greater risk to the patient. Furthermore, Brazilians are being exposed to radiation without necessity. The reasons range from radiological equipment miscalibrated to poorly trained staff. Thus we evaluate the conditions and practices of radiation protection technicians in radiology according to Ordinance 453 in Goiania, GO, Brazil. Through a descriptive survey with a quantitative approach, we used the technique of gathering information based on a questionnaire. From this survey, we identified the procedures used by radiation protection professionals and concluded that there are failures in the procedures for protecting patients and accompanying and in the training of the professionals. (author)

  12. Radiology

    International Nuclear Information System (INIS)

    Sykora, A.

    2006-01-01

    In this text-book basic knowledge about radiology, biomedical diagnostic methods (radiography, computer tomography), nuclear medicine and safety and radiation protection of personnel on the radiodiagnostic place of work are presented

  13. Radiological and clinical evaluation of colorectal cancer

    International Nuclear Information System (INIS)

    Shin, O. J.; Chin, S. Y.; Lee, K. S.; Park, S. S.

    1982-01-01

    One hundred thirty two cases of the pathologically proven colorectal cancer at Korea Atomic Energy Research Institute Hospital in the period from January 1973 to June 1980 were analyzed radiologically and clinically. The results were as follows: 1. The colorectal cancer was prevalent in rectosigmoid area and in the fourth to seventh decade of life. 2. The clinical pictures were classified into two groups. The one was rectosigmoid cancer with bowel habit changes. The other was one with no specific symptoms or signs. The clinical pictures of the right colon cancer were rather indirected, chronic and systemic than those of the left one. 3. The roentgenological findings were classified into two groups. The one was rectum and left colon cancer with symmetrical annular narrowing and the other showed trumpet-like proximal dilatation. 4. The most frequent complication was intestinal obstruction. 5. The majority of colorectal cancer was adenocarcinoma. The squamous cell carcinoma and atypical cell carcinoma were most prevalent in rectum, but malignantly lymphoma often occurred in right colon. The rarest colorectal cancer was atypical cell carcinoma in rectum

  14. Radiological evaluation of chinchilla mastication organs

    International Nuclear Information System (INIS)

    Sulik, M.; Sobolewska, E.; Ey-Chmielewska, H.; Fraczak, B.; Seremak, B.

    2007-01-01

    The studies were undertaken in order to analyse radiologically bone structures of the maxilla and mandibula including the teeth in chinchillas that show pathological overgrowth of incisor and molar teeth. The analysis included 10 sick and 10 healthy animals, whose skulls were post-mortem dissected and compared. The x - ray pictures were examined for significant elements of the bone structure; shape and saturation of incisor and molar teeth, shape, saturation, and thickness of cranial sutures, as well as the evenness of the intensity of the symptoms. The structure of the incisor teeth revealed excessive tissue mineralisation. The tooth canal was invisible, which may indicate fibrosis of the pulp. The cutting edges exhibited excessive mineralisation, which implied a lack of abrasion. The pulp growth cone was invisible. The shape of the upper incisor was altered and semicircular, this prevented contact between the edges of the opposing teeth. The surface structure of the molars was considerably saturated with invisible dental pulp, which may imply fibrosis. The roots of the teeth were distended and flask-like inb shape, and considerably saturated. The visible excessive mineralisation in all the molar teeth implied a general process of osteosclerosis. (author)

  15. Radiology education. The evaluation and assessment of clinical competence

    International Nuclear Information System (INIS)

    Hibbert, Kathryn M.; Van Deven, Teresa; Chhem, Rethy K.; Nagasaki Univ.; Wang, Shih-chang; Royal Australian and New Zealand College of Radiologists, Sydney

    2012-01-01

    Third volume of a trilogy devoted to radiology education and improvement of medical imaging students' learning, teaching, and scholarship. Reviews the philosophies, theories, and principles that underpin assessment and evaluation in radiology education. Includes a series of rich case studies. Written by an international group of experienced educators and medical professionals. This book reviews the philosophies, theories, and principles that underpin assessment and evaluation in radiology education, highlighting emerging practices and work done in the field. The sometimes conflicting assessment and evaluation needs of accreditation bodies, academic programs, trainees, and patients are carefully considered. The final section of the book examines assessment and evaluation in practice, through the development of rich case studies reflecting the implementation of a variety of approaches. This is the third book in a trilogy devoted to the scholarship of radiology education and is the culmination of an important initiative to improve medical imaging students' learning, teaching, and scholarship by bringing together experienced educators and medical professionals. The previous two books focused on the culture and the learning organizations in which our future radiologists are educated and on the application of educational principles in the education of radiologists. Here, the trilogy comes full circle: attending to the assessment and evaluation of the education of its members has much to offer back to the learning of the organization.

  16. Evaluation of medical radiation exposure in pediatric interventional radiology procedures

    Energy Technology Data Exchange (ETDEWEB)

    Navarro, Valeria Coelho Costa; Navarro, Marcus Vinicius Teixeira; Oliveira, Aline da Silva Pacheco, E-mail: vccnavarro@gmail.com [Instituto Federal de Educacao, Ciencia e Tecnologia da Bahia (IFBA), Salvador, BA (Brazil); Maia, Ana Figueiredo [Universidade Federal de Sergipe (UFS), Aracaju, SE (Brazil); Oliveira, Adriano Dias Dourado [Sociedade Brasileira de Hemodinamica e Cardiologia Intervencionista, Salvador, BA (Brazil)

    2012-07-15

    Objective: To evaluate pediatric radiation exposure in procedures of interventional radiology in two hospitals in the Bahia state, aiming at contributing to delineate the scenario at the state and national levels. The knowledge of exposure levels will allow an evaluation of the necessity of doses optimization, considering that peculiarities of radiology and pediatrics become even more significant in interventional radiology procedures which involve exposure to higher radiation doses. Materials and Methods: A total of 32 procedures were evaluated in four rooms of the two main hospitals performing pediatric interventional radiology procedures in the Bahia state. Air kerma rate and kerma-area product were evaluated in 27 interventional cardiac and 5 interventional brain procedures. Results: Maximum values for air kerma rate and kerma-area product and air kerma obtained in cardiac procedures were, respectively, 129.9 Gy.cm{sup 2} and 947.0 mGy; and, for brain procedures were 83.3 Gy.cm{sup 2} and 961.0 mGy. Conclusion: The present study results showed exposure values up to 14 times higher than those found in other foreign studies, and approximating those found for procedures in adults. Such results demonstrate excessive exposure to radiation, indicating the need for constant procedures optimization and evaluation of exposure rates. (author)

  17. Radiologic evaluation of carcinoma of the gallbladder

    International Nuclear Information System (INIS)

    Kim, I. Y.; Kim, K. W.; Yoo, H. S.; Lee, J. T.; Park, C. Y.

    1983-01-01

    Thirty five cases of pathlogically proven carcinoma of the gallbladder at Yonsei Univ. College. of Med. Severance Hospital in the period from May, 1978 to Oct, 1982 were analyzed radiologically and clinically. The brief results are as follows: 1. The ratio of male to female was 1 : 1.2 and prevalent in the sixth decade of life. 2. Clinical feature show RUQ pain in 24 cases. Epigastric pain in 13 cases and jaundice in 6 cases, symptom duration is variable from 1 week to over year. 3. Oral and IV cholangiography were performed in 17 cases. Nonvisualization of gallbladder was observed in 14 cases. Filling defect in gallbladder was observed in 2 cases and air biliarygram is observed in 1 case. 4. UGI series was performed in 11 cases. Postbulbar indentation was observed in 9 cases, gastric antrum indentation in 2 cases, postbulbar indentation with adhesion in 2 cases and normal finding was observed in 2 cases. 5. PTC was performed in 7 cases. Nonvisualization of gallbladder was observed in 7 cases, abrupt obstruction at porta hepatis in 3 cases, abrupt eccentric obstruction extrahepatic duct at cystic duct level in 2 cases, lobulated mass effect in extrahepatic duct at the level of cystic duct opening in 1 case. Round swing of extrahepatic duct with dilatation was observed in 1 case. 6. ERCP was performed in 11 cases. Nonvisualization of gallbladder was observed in 8 cases, irregular large intraluminal filling defect in 2 cases, multiple stone in 1 case, abrupt narrowing proximal CBD in 3 cases, extrinsic mass effect in CHD was observed in 1 case. 7. Celiac angiography was performed in 3 cases. Cystic artery hypertrophy was observed in 1 case and halo appearance in gallbladder area was observed in 1 case. 8. Ultrasound for investigation of carcinoma of gallbladder was performed in 16 cases. Homogenous echoes in gallbladder was observed in 6 cases, Bull's eye appearance in 4 cases, fungasting mass in

  18. MRI, CT, and sonography in the preoperative evaluation of primary tumor extension in malignant pleural mesothelioma

    International Nuclear Information System (INIS)

    Layer, G.; Steudel, A.; Schild, H.H.; Schmitteckert, H.; Tuengerthal, S.; Schirren, J.; Kaick, G. van

    1999-01-01

    Purpose: Evaluation of the diagnostic value of the imaging modalities computed tomography (CT), magnetic resonance imaging (MRI), and thoracic sonography in the preoperative staging of malignant pleural mesothelioma. Results: The accuracy rates for CT were 85%, 98%, 83%, 73%, 71%, and 83%. MRI had an accuracy of 71%, 92%, 71%, 83%, 71%, and 96%, the thoracic ultrasound examinations of 76%, 63%, 51%, 60%, 71% and 89%. Conclusions: According to these results CT remains the method of choice in the preoperative assessment of T-stage of malignant pleural mesothelioma. MRI is of nearly the same value, but is not a must. Sonography may be supplementary method for operation planning. (orig./AJ) [de

  19. Evaluation of radiological exposure from Plowshare applications, 1967--1975

    International Nuclear Information System (INIS)

    Barton, C.J.; Kaye, S.V.

    1975-08-01

    A review of the highlights and accomplishments of the nine-year program, FY 1967-75, at ORNL on the evaluation of the radiological exposure from Plowshare applications is presented. Conclusions based on the studies summarized are given. Chronological lists of presentations, reports and open literature publications on the various investigations of the program are appended to the report. (auth)

  20. Post-deployment usability evaluation of a radiology workstation

    NARCIS (Netherlands)

    Jorritsma, Wiard; Cnossen, Fokie; Dierckx, Rudi A.; Oudkerk, Matthijs; Van Ooijen, Peter M. A.

    Objectives: To determine the number, nature and severity of usability issues radiologists encounter while using a commercially available radiology workstation in clinical practice, and to assess how well the results of a pre-deployment usability evaluation of this workstation generalize to clinical

  1. Preoperative evaluation of hilar vessel anatomy with 3-D computerized tomography in living kidney donors.

    Science.gov (United States)

    Tombul, S T; Aki, F T; Gunay, M; Inci, K; Hazirolan, T; Karcaaltincaba, M; Erkan, I; Bakkaloglu, A; Yasavul, U; Bakkaloglu, M

    2008-01-01

    Digital subtract angiography is the gold standard for anatomic assessment of renal vasculature for living renal donors. However, multidetector-row computerized tomography (MDCT) is less invasive than digital subtract angiography and provides information of kidney stones and other intra-abdominal organs. In this study, preoperative MDCT angiography results were compared with the peroperative findings to evaluate the accuracy of MDCT for the evaluation of renal anatomy. From December 2002 to May 2007, all 60 consecutive living kidney donors were evaluated with MDCT angiography preoperatively. We reported the number and origin of renal arteries, presence of early branching arteries, and any intrinsic renal artery disease. Renal venous anatomy was evaluated for the presence of accessory, retroaortic, and circumaortic veins using venous phase axial images. The calyces and ureters were assessed with delayed topograms. The results of the MDCT angiography were compared with the peroperative findings. A total of 67 renal arteries were seen peroperatively in 60 renal units. Preoperative MDCT angiography detected 64 of them. The two arteries not detected by MDCT had diameters less than 3 mm. Anatomic variations were present in nine veins, five of which were detected by CT angiography. Sensitivity of MDCT angiography for arteries and veins was 95% and 93%, respectively. Positive predictive values were 100% for both arteries and veins. MDCT angiography offers a less invasive, rapid, and accurate preoperative investigation modality for vascular anatomy in living kidney donors. It also provides sufficient information about extrarenal anatomy important for donor surgery.

  2. Radiation dose evaluation in patients submitted to conventional radiological examinations

    International Nuclear Information System (INIS)

    Tilly Junior, Joao G.

    1997-01-01

    This work presents the results of the evaluation of radiation dose delivered to the patients undergoing conventional radiological procedures. Based in the realized measurement some indicators are settled to quantitative appraisal of the radiological protection conditions offered to the population. Data assessment was done in the county of Curitiba, in Parana State, Brazil, from 12/95 to 04/96, in ten rooms of three different institutions, under 101 patients, adults with 70 ± 10 kg, during real examinations of chest PA, chest LAT and abdomen AP. (author)

  3. Evaluation of the effectiveness of gonad protection in diagnostic radiology

    International Nuclear Information System (INIS)

    Kawaura, Chiyo; Aoyama, Takahiko; Koyama, Shuji

    2004-01-01

    In the present study we describes the evaluation of the effectiveness of gonad protection in diagnostic radiology based on the measurement of organ and the effective doses with and without lead clothing to gonads. We devised in-phantom dosimetry system and measured organ and effective doses in x-ray radiography and CT examinations with the new dosimetry system. From the data of organ and the effective doses we assessed the effectiveness of radiological protection by the use of lead clothing to gonads. Although in chest radiography and chest CT examinations, the effectiveness of radiological protection was not found, in the case of hip joint radiography (AP), gonad doses decreased remarkably by using lead clothing. The effectiveness of radiological protection, i.e. the ratio of the decreased dose to the dose value without protection, in testis and ovary were found to be 91.4% and 68.0%, respectively. It was also found that gonad doses observed with and without gonad protection were extremely lower than those of threshold for sterility recommended by the International Commission on Radiological Protection 60 (ICRP Publ. 60). (author)

  4. [Evaluation of the effectiveness of gonad protection in diagnostic radiology].

    Science.gov (United States)

    Kawaura, Chiyo; Aoyama, Takahiko; Koyama, Shuji

    2004-01-01

    In the present study we describe the evaluation of the effectiveness of gonad protection in diagnostic radiology based on the measurement of organ and the effective doses with and without lead clothing to gonads. We devised in-phantom dosimetry system and measured organ and effective doses in x-ray radiography and CT examinations with the new dosimetry system. From the data of organ and the effective doses we assessed the effectiveness of radiological protection by the use of lead clothing to gonads. Although in chest radiography and chest CT examinations, the effectiveness of radiological protection was not found, in the case of hip joint radiography (AP), gonad doses decreased remarkably by using lead clothing. The effectiveness of radiological protection, i.e. the ratio of the decreased dose to the dose value without protection, in testis and ovary were found to be 91.4% and 68.0%, respectively. It was also found that gonad doses observed with and without gonad protection were extremely lower than those of threshold for sterility recommended by the International Commission on Radiological Protection 60 (ICRP Publ. 60).

  5. Innovations in macroscopic evaluation of pancreatic specimens and radiologic correlation

    International Nuclear Information System (INIS)

    Triantopoulou, Charikleia; Papaparaskeva, Kleo; Agalianos, Christos; Dervenis, Christos

    2016-01-01

    •The axial slicing technique offers many advantages in accurate estimation of tumors extend and staging.•Cross-sectional axial imaging is the best technique for accurate radiologic-pathologic correlation.•Correlation may explain any discrepancies between radiological and histopathological findings.•Pathology correlation may offer a better understanding of the missed findings by imaging or pitfalls The axial slicing technique offers many advantages in accurate estimation of tumors extend and staging. Cross-sectional axial imaging is the best technique for accurate radiologic-pathologic correlation. Correlation may explain any discrepancies between radiological and histopathological findings. Pathology correlation may offer a better understanding of the missed findings by imaging or pitfalls The purpose of this study was to evaluate the feasibility of a novel dissection technique of surgical specimens in different cases of pancreatic tumors and provide a radiologic pathologic correlation. In our hospital, that is a referral center for pancreatic diseases, the macroscopic evaluation of the pancreatectomy specimens is performed by the pathologists using the axial slicing technique (instead of the traditional procedure with longitudinal opening of the main pancreatic and/or common bile duct and slicing along the plane defined by both ducts). The specimen is sliced in an axial plane that is perpendicular to the longitudinal axis of the descending duodenum. The procedure results in a large number of thin slices (3–4 mm). This plane is identical to that of CT or MRI and correlation between pathology and imaging is straightforward. We studied 70 cases of suspected different solid and cystic pancreatic tumors and we correlated the tumor size and location, the structure—consistency (areas of necrosis—hemorrhage—fibrosis—inflammation), the degree of vessels’ infiltration, the size of pancreatic and common bile duct and the distance from resection margins

  6. Preoperative evaluation of the adult patient undergoing non-cardiac surgery: guidelines from the European Society of Anaesthesiology

    NARCIS (Netherlands)

    de Hert, Stefan; Imberger, Georgina; Carlisle, John; Diemunsch, Pierre; Fritsch, Gerhard; Moppett, Iain; Solca, Maurizio; Staender, Sven; Wappler, Frank; Smith, Andrew

    2011-01-01

    The purpose of these guidelines on the preoperative evaluation of the adult non-cardiac surgery patient is to present recommendations based on available relevant clinical evidence. The ultimate aims of preoperative evaluation are two-fold. First, we aim to identify those patients for whom the

  7. Pre-operative evaluation of patients with chronic liver disease

    International Nuclear Information System (INIS)

    Tapias M Monica; Idrovo Cubides, Victor

    2006-01-01

    Patients with advanced liver disease have an increased risk of complications, compared to healthy patients when they undergo a surgical procedure. This risk is related to the type of surgery, to the type of anesthetic used, and to the severity of the underlying liver disease. Several risk factors for liver disease should be identified prior to a procedure. Those with advanced disease should undergo specific pre-surgical diagnostic tests. The Child Pugh score, and the MELD score, are very useful to establish the surgical risk in individuals with liver disease. The Child-Pugh score is a very useful tool that correlates closely to morbidity and mortality in patients with liver disease. Mortality rates in these patients undergoing major surgery is 10, 30 and 82% for Child-Pugh scores A, B and C respectively. In order to optimize the patient's condition before surgery, a complete evaluation and management of conditions such as jaundice, coagulopathy, ascites, electrolyte abnormalities, renal insufficiency and encephalopathy must be performed. This approach helps to reduce the complication rate in these individuals

  8. Radiologic evaluation of nonalcoholic fatty liver disease

    Science.gov (United States)

    Lee, Seung Soo; Park, Seong Ho

    2014-01-01

    Nonalcoholic fatty liver disease (NAFLD) is a frequent cause of chronic liver diseases, ranging from simple steatosis to nonalcoholic steatohepatitis (NASH)-related liver cirrhosis. Although liver biopsy is still the gold standard for the diagnosis of NAFLD, especially for the diagnosis of NASH, imaging methods have been increasingly accepted as noninvasive alternatives to liver biopsy. Ultrasonography is a well-established and cost-effective imaging technique for the diagnosis of hepatic steatosis, especially for screening a large population at risk of NAFLD. Ultrasonography has a reasonable accuracy in detecting moderate-to-severe hepatic steatosis although it is less accurate for detecting mild hepatic steatosis, operator-dependent, and rather qualitative. Computed tomography is not appropriate for general population assessment of hepatic steatosis given its inaccuracy in detecting mild hepatic steatosis and potential radiation hazard. However, computed tomography may be effective in specific clinical situations, such as evaluation of donor candidates for hepatic transplantation. Magnetic resonance spectroscopy and magnetic resonance imaging are now regarded as the most accurate practical methods of measuring liver fat in clinical practice, especially for longitudinal follow-up of patients with NAFLD. Ultrasound elastography and magnetic resonance elastography are increasingly used to evaluate the degree of liver fibrosis in patients with NAFLD and to differentiate NASH from simple steatosis. This article will review current imaging methods used to evaluate hepatic steatosis, including the diagnostic accuracy, limitations, and practical applicability of each method. It will also briefly describe the potential role of elastography techniques in the evaluation of patients with NAFLD. PMID:24966609

  9. Radiologic evaluation of neonatal and childhood hypertension

    International Nuclear Information System (INIS)

    Amour, T.S.; Siegel, M.J.

    1986-01-01

    The authors reviewed the radiographic findings in 40 neonates and 90 children and adolescents with hypertension. In neonates the common causes of secondary hypertension were renal vascular thrombosis (33%), polycystic kidney disease (25%), and obstructive uropathy (17%). US and renal scans were the most useful studies and yielded diagnostic information in approximately 70% of cases. Surgically correctable hypertension was found in almost half the patients. In patients over 1 year of age, the common causes of hypertension were medical renal disease (50%) and renovascular hypetension (15%). Urography, scintigraphy, and arteriography played a crucial role in their evaluation

  10. Radiological evaluation of the acromioclavicular joint

    International Nuclear Information System (INIS)

    Vaeaetaeinen, U.; Maekelae, A.; Pirinen, A.

    1991-01-01

    X-ray measurement of the acromioclavicular (AC) joint may cause difficulties because of different projections and the lack of a reproducible measurement. In order to find the ideal measurement to estimate the state of the AC joint, 28 healthy adult volunteers were X-rayed. The least vulnerable measurement for errors in projection was the distance between the coracoid process and the upper part of the clavicle. The effect of stress was evaluated; the range of normal AC joint laxity was determined as 3 mm. (orig.)

  11. Radiological evaluation of the acromioclavicular joint

    Energy Technology Data Exchange (ETDEWEB)

    Vaeaetaeinen, U.; Maekelae, A. (Kuopio Univ. Central Hospital (Finland). Dept. of Surgery); Pirinen, A. (Kuopio Univ. Central Hospital (Finland). Dept. of Radiology)

    1991-02-01

    X-ray measurement of the acromioclavicular (AC) joint may cause difficulties because of different projections and the lack of a reproducible measurement. In order to find the ideal measurement to estimate the state of the AC joint, 28 healthy adult volunteers were X-rayed. The least vulnerable measurement for errors in projection was the distance between the coracoid process and the upper part of the clavicle. The effect of stress was evaluated; the range of normal AC joint laxity was determined as 3 mm. (orig.).

  12. [Pre-operation evaluation and intra-operation management of cochlear implantation].

    Science.gov (United States)

    Zhang, Dao-xing; Hu, Bao-hua; Xiao, Yu-li; Shi, Bo-ning

    2004-10-01

    To summarize pre-operation evaluation experiences in cochlear implantation. Performing auditory evaluation and image analysis seriously in 158 severe hearing loss or total deaf cases before cochlear implantation, comparing their performance with the findings during and post operation. Among the total 158 cases, 116 cases with normal structure, 42 cases with the abnormal findings of the inner or middle ear. Stapedial gusher happened in 6 cases, 1 case was not predicted before operation. Except 1 case with serious malformation, the findings of other 157 cases in operation were consistent with the pre-operation evaluation. We helped all patients reconstruct auditory conduction with cochlear implantation, and the average hearing level up to 37.6 dB SPL. Performing image analysis seriously before operation and planning for operation according to HRCT can do great help to cochlear implantation. The operation under the HRCT instruction has less complications.

  13. Radiological evaluation of nonvisualizing kidney on IVP

    International Nuclear Information System (INIS)

    Moon, J. H.; Sung, K. B.; Cho, O. K.; Hahm, C. K.

    1983-01-01

    IVP is simple, noninvasive screening examination of the kidneys and is helpful for evaluation of the functional and structural changes if the pyelogram was obtained. Unilateral nonvisualizing kidney may be resulted from various diseases that can produce vascular obstruction, functional determination of the glomerular filtration and obstruction of the lower urinary tract. In cases of nonvisualizing kidney further study including RGP, renal angiography, CT, ultrasonography and RI imaging is needed. During the perfect of 10 years from 1972 to 1981, 100 cases of nonvisualizing kidney which could be diagnosed by other imaging studies. The authors reviews medical records and finding of RGP, renal angiography, CT and ultrasonography of the nonvisualizing kidneys. The results were as follows: 1. The material included 53 male and 47 female patterns. The age distribution was broad, but mostly in the twenties and forties of ages. 2. There was no remarkable differentiation between sides of involvement in both sexes. 3. The underlying diseases of nonvisualizng kidney on IVP were renal tuberculosis (33 patients), ureteral stricture (16 patients), ureteral stone (12 patients), real tumor (10 patients), pelvic mass (10 patients), chronic pyelonephritis (8 patients), renal agenesis (5 patients), renal trauma (4 patients), and renal disease of vascular origin (2 patients) respectively. 4. RGP was performed in 79 out of 100 cases. RGP was the most confirmative diagnostic procedure in cases of inflammatory diseases of the kidney and renal pelvic tumors. 5. Renal angiography was performed in 19 cases. Renal angiography was very helpful in the diagnosis and evaluation of the extent of the diseases in 6 cases of renal tumors, 3 cases renal trauma, 2 cases of renal vascular diseases and 3 cases of renal agenesis. 6. Body CT was performed in one case of renal cell carcinoma and other 6 cases of hydronephrosis mainly from tumors of the pelvic cavity including 4 cervical carcinomas and a

  14. Solid bolus swallowing in the radiologic evaluation of dysphagia

    International Nuclear Information System (INIS)

    Westen, D. van; Ekberg, O.

    1993-01-01

    Patients with dysphagia, heartburn and chest pain are regularly referred for radiologic evaluation of swallowing. The liquid barium swallow has been of great value for the biphasic evaluation of the pharynx and esophagus. Though many patients complain of dysphagia specifically for solids, solid bolus swallow is ususally not part of the evaluation. For the present study we therefore included the use of a solid bolus with a diameter of 13 mm and interviewed the patients carefully for any symptoms during this tablet swallow. Of 200 patients examined, the tablet passed through the esophagus without delay in 102. In the 98 patients with delayed passage, the solid bolus arrest occurred in the pharynx in 5 and in the esophagus in 93. Arrest in the esophagus was due to esophageal dysmotility in 48 patients. Twenty of these were symptomatic during the tablet swallow. A narrowing was the cause in 45, of whom 9 had symptoms. In 18 patients (9%) the solid bolus added key information to the radiologic evaluation. We therefore recommend that the solid bolus is included in the routine radiologic work-up of patients with dysphagia. Careful attention to symptoms during the tablet swallow is important. (orig.)

  15. Solid bolus swallowing in the radiologic evaluation of dysphagia

    Energy Technology Data Exchange (ETDEWEB)

    Westen, D. van (Dept. of Diagnostic Radiology, Malmoe General Hospital, Univ. Lund (Sweden)); Ekberg, O. (Dept. of Diagnostic Radiology, Malmoe General Hospital, Univ. Lund (Sweden))

    1993-07-01

    Patients with dysphagia, heartburn and chest pain are regularly referred for radiologic evaluation of swallowing. The liquid barium swallow has been of great value for the biphasic evaluation of the pharynx and esophagus. Though many patients complain of dysphagia specifically for solids, solid bolus swallow is ususally not part of the evaluation. For the present study we therefore included the use of a solid bolus with a diameter of 13 mm and interviewed the patients carefully for any symptoms during this tablet swallow. Of 200 patients examined, the tablet passed through the esophagus without delay in 102. In the 98 patients with delayed passage, the solid bolus arrest occurred in the pharynx in 5 and in the esophagus in 93. Arrest in the esophagus was due to esophageal dysmotility in 48 patients. Twenty of these were symptomatic during the tablet swallow. A narrowing was the cause in 45, of whom 9 had symptoms. In 18 patients (9%) the solid bolus added key information to the radiologic evaluation. We therefore recommend that the solid bolus is included in the routine radiologic work-up of patients with dysphagia. Careful attention to symptoms during the tablet swallow is important. (orig.).

  16. Evaluation of the integrity of radiological protection clothing used in veterinary radiology

    Energy Technology Data Exchange (ETDEWEB)

    Rosa, Paola da Costa; Barros, Frieda Saicla; Costa, Douglas Siqueira da, E-mail: paah_dacosta@hotmail.com [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil). Curso Superior de Tecnologia em Radiologia e Programa de Pos-Graduacao em Engenharia Biomedica

    2017-11-01

    This study aimed to evaluate the integrity of radiological protection clothing used by veterinarians in veterinary radiology facilities, and whether they are available in an adequate quantity for the team. Inspection was performed by palpation, followed by X-ray scanning in 189 clothing from 29 veterinary facilities. The results indicate that 5% of the clothes evaluated in this study were considered inadequate due to the failure of the integrity of the lead, being most lead aprons. All facilities have at least two lead aprons and one Thyroid protectors. 24% of the facilities have lead glasses, pointing to a risk to veterinarians by radiosensitivity of the eyes. Also, 24% of the facilities do not have lead gloves, which also presents a risk due to the hand's exposure to the primary beam. Most lead clothing has shield equivalence of 0.5mmPb. The method used in the study was effective in attesting the adequacy of lead clothing. It is recommended to periodically evaluate clothing to ensure that users are always protected. (author)

  17. Evaluation of the integrity of radiological protection clothing used in veterinary radiology

    International Nuclear Information System (INIS)

    Rosa, Paola da Costa; Barros, Frieda Saicla; Costa, Douglas Siqueira da

    2017-01-01

    This study aimed to evaluate the integrity of radiological protection clothing used by veterinarians in veterinary radiology facilities, and whether they are available in an adequate quantity for the team. Inspection was performed by palpation, followed by X-ray scanning in 189 clothing from 29 veterinary facilities. The results indicate that 5% of the clothes evaluated in this study were considered inadequate due to the failure of the integrity of the lead, being most lead aprons. All facilities have at least two lead aprons and one Thyroid protectors. 24% of the facilities have lead glasses, pointing to a risk to veterinarians by radiosensitivity of the eyes. Also, 24% of the facilities do not have lead gloves, which also presents a risk due to the hand's exposure to the primary beam. Most lead clothing has shield equivalence of 0.5mmPb. The method used in the study was effective in attesting the adequacy of lead clothing. It is recommended to periodically evaluate clothing to ensure that users are always protected. (author)

  18. Utility of Electrocardiography (ECG)-Gated Computed Tomography (CT) for Preoperative Evaluations of Thymic Epithelial Tumors.

    Science.gov (United States)

    Ozawa, Yoshiyuki; Hara, Masaki; Nakagawa, Motoo; Shibamoto, Yuta

    2016-01-01

    Preoperative evaluation of invasion to the adjacent organs is important for the thymic epithelial tumors on CT. The purpose of our study was to evaluate the utility of electrocardiography (ECG)-gated CT for assessing thymic epithelial tumors with regard to the motion artifacts produced and the preoperative diagnostic accuracy of the technique. Forty thymic epithelial tumors (36 thymomas and 4 thymic carcinomas) were examined with ECG-gated contrast-enhanced CT using a dual source scanner. The scan delay after the contrast media injection was 30 s for the non-ECG-gated CT and 100 s for the ECG-gated CT. Two radiologists blindly evaluated both the non-ECG-gated and ECG-gated CT images for motion artifacts and determined whether the tumors had invaded adjacent structures (mediastinal fat, superior vena cava, brachiocephalic veins, aorta, pulmonary artery, pericardium, or lungs) on each image. Motion artifacts were evaluated using a 3-grade scale. Surgical and pathological findings were used as a reference standard for tumor invasion. Motion artifacts were significantly reduced for all structures by ECG gating ( p =0.0089 for the lungs and p ECG-gated CT and ECG-gated CT demonstrated 79% and 95% accuracy, respectively, during assessments of pericardial invasion ( p =0.03). ECG-gated CT reduced the severity of motion artifacts and might be useful for preoperative assessment whether thymic epithelial tumors have invaded adjacent structures.

  19. Exercises for radiological and nuclear emergency response. Planing - performance - evaluation

    International Nuclear Information System (INIS)

    Bayer, A.; Faleschini, J.; Goelling, K.; Stapel, R.; Strobl, C.

    2010-01-01

    The report of the study group emergency response seminar covers the following topics: (A) purpose of exercises and exercise culture: fundamentals and appliances for planning, performance and evaluation; (B) exercises in nuclear facilities; (C) exercises of national authorities and aid organizations on nuclear scenarios; exercises of national authorities and aid organizations on other radiological scenarios; (D) exercises in industrial plants, universities, medical facilities and medical services, and research institutes; (E) transnational exercises, international exercises; (F): exercises on public information.

  20. Radiological evaluation of tuberculous spondylitis with computed tomography

    International Nuclear Information System (INIS)

    Lim, Seung Soo; Kim, Chung Hyun; Cho, June Sik; Rhee, Byung Chull

    1986-01-01

    Spinal tuberculosis is curable disease, and early diagnosis is mandatory for early treatment. We reviewed conventional radiographers and computed tomograms (CT) from Histopathologically confirmed 30 cases of spinal tuberculosis, and compared these findings with radiologic findings from 2 cases of pyogenic spondylitis and 4 cases of metastasis. The results were as follows: 1. The frequent site of involvement were thromboembolic junction and low lumbar vertebrae, and the most frequent type is multisegmented subligamentous type (93.3%). 2. CT was not of great use in the differential diagnosis of the tuberculosis. Dominant CT findings of tuberculous spondylitis were anterior vertebral body destruction, paravertebral soft-tissue mass and thick walled abscess formation occasionally containing calcification and disc space narrowing in the setting of an indolent or relatively benign course. 3. CT is the best modality for imaging the extent and anatomy of the destructive process, the degree of canal encroachment, and the change of adjacent vital structure. So CT was particularly useful in pre-operative planning of debridement and stabilization surgery. 4. The most common causes of neurologic manifestations in tuberculous spondylitis were the compression of spinal cord by sequestrated bony fragments and disc material, granulation tissue or abscess in the spinal canal.

  1. Innovations in macroscopic evaluation of pancreatic specimens and radiologic correlation

    Directory of Open Access Journals (Sweden)

    Charikleia Triantopoulou

    2016-01-01

    Full Text Available The purpose of this study was to evaluate the feasibility of a novel dissection technique of surgical specimens in different cases of pancreatic tumors and provide a radiologic pathologic correlation. In our hospital, that is a referral center for pancreatic diseases, the macroscopic evaluation of the pancreatectomy specimens is performed by the pathologists using the axial slicing technique (instead of the traditional procedure with longitudinal opening of the main pancreatic and/or common bile duct and slicing along the plane defined by both ducts. The specimen is sliced in an axial plane that is perpendicular to the longitudinal axis of the descending duodenum. The procedure results in a large number of thin slices (3–4 mm. This plane is identical to that of CT or MRI and correlation between pathology and imaging is straightforward. We studied 70 cases of suspected different solid and cystic pancreatic tumors and we correlated the tumor size and location, the structure—consistency (areas of necrosis—hemorrhage—fibrosis—inflammation, the degree of vessels’ infiltration, the size of pancreatic and common bile duct and the distance from resection margins. Missed findings by imaging or pitfalls were recorded and we tried to explain all discrepancies between radiology evaluation and the histopathological findings. Radiologic-pathologic correlation is extremely important, adding crucial information on imaging limitations and enabling quality assessment of surgical specimens. The deep knowledge of different pancreatic tumors’ consistency and way of extension helps to improve radiologists’ diagnostic accuracy and minimize the radiological-surgical mismatching, preventing patients from unnecessary surgery.

  2. Morphologic assessment of thoracic deformities for the preoperative evaluation of pectus excavatum by magnetic resonance imaging

    Energy Technology Data Exchange (ETDEWEB)

    Lollert, A.; Funk, J.; Tietze, N.; Laudemann, K.; Dueber, C.; Staatz, G. [Medical Center of the Johannes Gutenberg University, Department of Diagnostic and Interventional Radiology, Section Pediatric Radiology, Mainz (Germany); Turial, S. [Medical Center of the Johannes Gutenberg University, Department of Pediatric Surgery, Mainz (Germany)

    2014-10-15

    To assess whether MRI is a suitable modality for the preoperative assessment and quantification of pectus excavatum. A total of 69 patients (57 male, 12 female; median age 15 years, range 5-35 years) with pectus excavatum were evaluated preoperatively using standardized MRI sequences on 1.5- and 3-Tesla systems (T2-HASTE/inspiration and expiration, T1-VIBE, T2-TRUFI free-breathing, T2-BLADE). The MR sequences were analysed for quality semiquantitatively. The Haller index, correction index, sternal rotation angle and asymmetry index were assessed; correlations between these indices and changes in inspiration and expiration were evaluated. T2-HASTE was the best sequence to assess pectus excavatum morphology, with a higher quality at 3 T than at 1.5 T. All indices could be assessed in every patient. A total of 37 patients had a symmetric deformity, 32 patients an asymmetric deformity. The Haller index correlated significantly (p < 0.001) with the correction index, both becoming higher in expiration. The asymmetry index correlated with the sternal rotation angle (p < 0.001) and did not change significantly in expiration (p = 0.28). Thoracic MRI is suitable for the preoperative evaluation of patients with pectus excavatum. An exact morphologic assessment is possible without radiation exposure as well as the determination of several indices to quantify the deformities. (orig.)

  3. Radiological evaluation of lung volume among Koreans with silicosis

    International Nuclear Information System (INIS)

    Rhee, Byung Chull

    1975-01-01

    1. Radiological evaluation of lung volumes was carried out thirty Korean males patients with silicosis, and following results were obtained. 2. The mean radiological lung volume among those patients was 7,587 ml. 3. When compared with the group of normal Korean male adults ranging from 31 to 55 years of age, the mean lung volume was increased by 2,346 ml. 4. The lung volume of these patients was even slightly larger than that of the group of Korean athletes of all ages. 5. On the other hand, the vital capacity in patients with silicosis was markedly diminished, the mean vital capacity being 2,909 ml. 6. The patients with silicosis also revealed emphysematous changes in the lung as well as increased residual volumes. The vital capacity was smallest in the latest stage.

  4. Dose Evaluation and Quality Criteria in Dental Radiology

    International Nuclear Information System (INIS)

    Gori, C.; Rossi, F.; Stecco, A.; Villari, N.; Zatelli, G.

    2000-01-01

    Radioprotection in dental radiology is of particular interest in the framework of the Revised Medical Exposure Directive for the great number of examinations involving the adult as well as the paediatric population (Article 9: Special Practice). The present study is intended to find the quality criteria of orthodontic imaging and for evaluating the dose absorbed within the dental and maxillary volume in connection with radiological examinations performed with either spiral CT, dental panoramic tomography or teleradiography. The X ray dose to organs sited in the body, neck, ocular and intracranial area was measured using lithium fluoride dosemeters, positioned in a Rando phantom. Quality criteria have been established by an expert radiologist considering the diagnostic information obtained in the images. The dosimetric data obtained were comparable with other authors', although with some differences due to technical characteristics. These result data are useful for choosing the patient's diagnostic path, considering the radiobiological risk associated with increasing orthodontic imaging. (author)

  5. Evaluation of radiological protection aspects in radiodiagnostic rooms in Mexico City

    International Nuclear Information System (INIS)

    Escobar A, L.; Vizuet G, J.; Ruiz, M.A.

    1996-01-01

    The preliminary results of an evaluation of radiological protection carried out in radiology services of different hospitals of Mexico are shown. The evaluated points were: relative aspects of the room, operation parameters of operation of the equipment, work procedures and training about radiological protection for the equipment operators. (authors). 2 refs., 1 fig

  6. Chronic depression: development and evaluation of the luebeck questionnaire for recording preoperational thinking (LQPT

    Directory of Open Access Journals (Sweden)

    Kühnen Tanja

    2011-12-01

    Full Text Available Abstract Background A standardized instrument for recording the specific cognitive psychopathology of chronically depressed patients has not yet been developed. Up until now, preoperational thinking of chronically depressed patients has only been described in case studies, or through the external observations of therapists. The aim of this study was to develop and evaluate a standardized self-assessment instrument for measuring preoperational thinking that sufficiently conforms to the quality criteria for test theory. Methods The "Luebeck Questionnaire for Recording Preoperational Thinking (LQPT" was developed and evaluated using a german sample consisting of 30 episodically depressed, 30 chronically depressed and 30 healthy volunteers. As an initial step the questionnaire was subjected to an item analysis and a final test form was compiled. In a second step, reliability and validity tests were performed. Results Overall, the results of this study showed that the LQPT is a useful, reliable and valid instrument. The reliability (split-half reliability 0.885; internal consistency 0.901 and the correlations with other instruments for measuring related constructs (control beliefs, interpersonal problems, stress management proved to be satisfactory. Chronically depressed patients, episodically depressed patients and healthy volunteers could be distinguished from one another in a statistically significant manner (p Conclusion The questionnaire fulfilled the classical test quality criteria. With the LQPT there is an opportunity to test the theory underlying the CBASP model.

  7. Clarifying the Role of Urodynamics in the Preoperative Evaluation of Stress Urinary Incontinence

    Directory of Open Access Journals (Sweden)

    Sophie G. Fletcher

    2008-01-01

    Full Text Available It has not yet been definitively demonstrated that preoperative evaluation of women with stress urinary incontinence (SUI with urodynamic testing (UDS enhances surgical outcomes. Nonetheless, UDS is frequently utilized in the assessment of women with SUI in the hopes that results will shed light on preoperative risk factors for failure or postoperative voiding dysfunction. Poorer outcomes for stress incontinence surgery are primarily attributed to intrinsic sphincter deficiency (ISD, detrusor overactivity (DO, and voiding dysfunction. The ability of UDS to identify and characterize those parameters reliably remains under investigation. Furthermore, debate continues regarding the association of each of those factors with postoperative success for various SUI procedures. Since UDS is invasive, costly, and not always available, it is imperative that its benefit be carefully explored. In this review, we discuss the value of UDS in identifying risk factors for poor outcome and how those risk factors are associated with surgical failure.

  8. Radiologic evaluation of the liver in the alcoholic patient

    International Nuclear Information System (INIS)

    Peng, J.J.; Hirsch, G.; Posteraro, R.H.; Leo, J.S.; Blackwell, D.E.

    1985-01-01

    It has been well documented that long-term abuse of alcohol leads to dysfunction of multiple organ systems of the body. The liver, which is the primary organ responsible for alcohol metabolism, is also a major target for damage. Cirrhosis of the liver is the seventh leading cause of death in the United States. The radiologist plays an important role in the evaluation and possibly in the treatment of the conditions which result from alcohol abuse. The advantages and limitations of various radiologic diagnostic modalities in the evaluation of alcoholic liver disease are presented and discussed. 47 references

  9. Radiology

    International Nuclear Information System (INIS)

    Lissner, J.

    1985-01-01

    Diagnostic radiology is still the foremost of all innovative medical disciplines. This has many advantages but also some handicaps, e.g. the siting problem of medical equipment whose clinical potential is not fully known. This applies in particular to nuclear spin tomography, where the Laender governments and the Scientific Council seen to agree that all universities should have the appropriate equipment as soon as possible in order to intensify interdisciplinary research. Formerly, in the case of computerized tomography, there was less readiness. As a result, the siting of CT equipment is less organically structured. A special handicap of innovative fields is the problem of training and advanced training. The Chamber of Medicine and the Association of Doctors Participating in the Health Insurance Plan have issued regulations aimed at a better standardisation in this field. (orig.) [de

  10. Evaluating Compliance with Institutional Preoperative Testing Guidelines for Minimal-Risk Patients Undergoing Elective Surgery

    Directory of Open Access Journals (Sweden)

    Arunotai Siriussawakul

    2013-01-01

    Full Text Available Background. Few investigations preoperatively are important for low-risk patients. This study was designed to determine the level of compliance with preoperative investigation guidelines for ASA I patients undergoing elective surgery. Secondary objectives included the following: to identify common inappropriate investigations, to evaluate the impact of abnormal testing on patient management, to determine factors affecting noncompliant tests, and to estimate unnecessary expenditure. Methods. This retrospective study was conducted on adult patients over a one-year period. The institute’s guidelines recommend tests according to the patients’ age groups: a complete blood count (CBC for those patients aged 18–45; CBC, chest radiograph (CXR and electrocardiography (ECG for those aged 46–60; and CBC, CXR, ECG, electrolytes, blood glucose, blood urea nitrogen (BUN, and creatinine (Cr for patients aged 61–65. Results. The medical records of 1,496 patients were reviewed. Compliant testing was found in only 12.1% (95% CI, 10.5–13.9. BUN and Cr testings were the most frequently overprescribed tests. Overinvestigations tended to be performed on major surgery and younger patients. Overall, overinvestigation incurred an estimated cost of US 200,000 dollars during the study period. Conclusions. The need to utilize the institution’s preoperative guidelines should be emphasized in order to decrease unnecessary testing and the consequential financial burden.

  11. Evaluating compliance with institutional preoperative testing guidelines for minimal-risk patients undergoing elective surgery.

    Science.gov (United States)

    Siriussawakul, Arunotai; Nimmannit, Akarin; Rattana-arpa, Sirirat; Chatrattanakulchai, Siritda; Saengtawan, Puttachard; Wangdee, Aungsumat

    2013-01-01

    Few investigations preoperatively are important for low-risk patients. This study was designed to determine the level of compliance with preoperative investigation guidelines for ASA I patients undergoing elective surgery. Secondary objectives included the following: to identify common inappropriate investigations, to evaluate the impact of abnormal testing on patient management, to determine factors affecting noncompliant tests, and to estimate unnecessary expenditure. This retrospective study was conducted on adult patients over a one-year period. The institute's guidelines recommend tests according to the patients' age groups: a complete blood count (CBC) for those patients aged 18-45; CBC, chest radiograph (CXR) and electrocardiography (ECG) for those aged 46-60; and CBC, CXR, ECG, electrolytes, blood glucose, blood urea nitrogen (BUN), and creatinine (Cr) for patients aged 61-65. The medical records of 1,496 patients were reviewed. Compliant testing was found in only 12.1% (95% CI, 10.5-13.9). BUN and Cr testings were the most frequently overprescribed tests. Overinvestigations tended to be performed on major surgery and younger patients. Overall, overinvestigation incurred an estimated cost of US 200,000 dollars during the study period. The need to utilize the institution's preoperative guidelines should be emphasized in order to decrease unnecessary testing and the consequential financial burden.

  12. Evaluation of utility monitoring and preoperational hydrothermal modeling at three nuclear power plant sites

    International Nuclear Information System (INIS)

    Marmer, G.J.; Policastro, A.J.

    1977-01-01

    This paper evaluates the preoperational hydrothermal modeling and operational monitoring carried out by utilities as three nuclear-power-plant sites using once-through cooling. Our work was part of a larger study to assess the environmental impact of operating plants for the Nuclear Regulatory Commission (NRC) and the suitability of the NRC Environmental Technical Specifications (Tech Specs) as set up for these plants. The study revealed that the plume mappings at the Kewaunee, Zion, and Quad Cities sites were generally satisfactory in terms of delineating plume size and other characteristics. Unfortunately, monitoring was not carried out during the most critical periods when largest plume size would be expected. At Kewaunee and Zion, preoperational predictions using analytical models were found to be rather poor. At Kewaunee (surface discharge), the Pritchard Model underestimated plume size in the near field, but grossly overestimated the plume's far-field extent. Moreover, lake-level variations affected plume dispersion, yet were not considered in preoperational predictions. At Zion (submerged discharge) the Pritchard Model was successful only in special, simple cases (single-unit operation, no stratification, no reversing currents, no recirculation). Due to neglect of the above-mentioned phenomena, the model underpredicted plume size. At Quad Cities (submerged discharge), the undistorted laboratory model predicted plume dispersion for low river flows. These low flow predictions appear to be reasonable extrapolations of the field data acquired at higher flows

  13. Evaluation of radiation protection conditions in intraoral radiology

    Energy Technology Data Exchange (ETDEWEB)

    Miguel, Cristiano; Barros, Frieda Saicla; Rocha, Anna Silvia Penteado Setti da, E-mail: miguel_cristianoch@yahoo.com.br [Universidade Tecnologica Federal do Parana (PPGEB/UTFPR), Curitiba, PR (Brazil). Programa de Pos-graduacao em Engenharia Biomedica; Tilly Junior, Joao Gilberto [Universidade Federal do Parana (UNIR/UFPR), Curitiba, PR (Brazil). Hospital de Clinicas. Unidade de Imagem e Radioterapia; Almeida, Claudio Domingues de [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Dept. de Fisica Medica

    2016-04-15

    Introduction: The dental radiology represents about 20% of human exposure to radiation in radio diagnostic. Although the doses practiced in intraoral dentistry are considered low, they should not be ignored due to the volume of the performed procedures. This study presents the radiation protection conditions for intraoral radiology in Curitiba - PR. Methods: Data was collected through a quantitative field research of a descriptive nature during the period between September of 2013 and December of 2014. The survey sample consisted of 97 dentists and 130 intraoral equipment. The data related to the equipment was collected using structured questions and quality control evaluations. The evaluations of the entrance skin dose, the size of the radiation field and the total filtration were performed with dosimetry kits provided and evaluated by IRD/CNEN. The exposure time and voltage were measured using noninvasive detectors. The occupational dose was verified by thermoluminescent dosimeters. The existence of personal protection equipment, the type of image processing and knowledge of dentists about radiation protection were verified through the application of a questionnaire. Results: Among the survey's results, it is important to emphasize that 90% of the evaluated equipment do not meet all the requirements of the Brazilian radiation protection standards. Conclusion: The lack of knowledge about radiation protection, the poor operating conditions of the equipment, and the image processing through visual method are mainly responsible for the unnecessary exposure of patients to ionizing radiation. (author)

  14. [Preoperative evaluation of surgery for intractable aspiration based on the prognostic nutritional index].

    Science.gov (United States)

    Uchida, Masaya; Hashimoto, Keiko; Mukudai, Shigeyuki; Ushijima, Chihisa; Dejima, Kenji

    2014-12-01

    Because there is no absolute indicator of the nutritional status and prognosis in patients with severe aspiration problems, it is quite difficult to arrive at a true long-time prognosis. By performing surgery for intractable aspiration on such patients, both the prognosis and QOL of the patients could be expected to improve. In our department, we have experienced patients dying within 6 months after surgery. In these cases, the patient's preoperative nutritional status was not good. Therefore, we consider that, when we adopt this procedure, there should be some indicators we should use which could have an effect on the prognosis of such nutritionally-challenged patients. In patients who underwent surgery for intractable aspiration; we examined the relationship between their survival and the prognostic nutritional index (PNI) which is an indicator of the risk of complications such as post-operative events in the surgical field. We investigated the relationship between the prognosis and the postoperative indicators of each of the following: WBC, CRP, serum albumin level, and PNI. Out of a total of 31 cases, the average O-PNI of eight cases in which death occurred was 29.45, and the average of six cases in which death occurred within 6 months after surgery was 28.26. The average O-PNI of the survivors was 36.01. A significant association was noted between the early postoperative deaths and some of the four indicators namely that serum albumin level and O-PNI. Based on the ROC curve, the O-PNI offered higher precision than the albumin level. The cut-off value of the O-PNI value for early postoperative mortality rate was 32. The early postoperative mortality rate was 44.4% in patients with less than 32 O-PNI in the preoperative examination, but if it were O-PNI 32 or more, the early postoperative mortality rate was 9.1%, significantly lower. Therefore, O-PNI could be useful as one of the prognostic evaluation factors in the case of preoperative surgery for intractable

  15. Dosskin code for radiological evaluation of skin radioactive contaminations

    International Nuclear Information System (INIS)

    Cornejo D, N.

    1996-01-01

    The conceptual procedure and computational features of the DOSSKIN code are shown. This code calculates, in a very interactive way, skin equivalent doses and radiological risk related to skin radioactive contaminations. The evaluation takes into account the contributions of contaminant daughter nuclides and backscattering of beta particles in any skin cover. DOSSKIN also allows to estimate the maximum time needed to decontaminate the affected zone, using, as input quantity, the limit value of skin equivalent dose considered by users. The comparison of the results obtained by the DOSSKIN code with those reported by different authors are showed. The differences of results are less than 30%. (authors). 4 refs., 3 fig., 1 tab

  16. Radiological findings in angiofibroma

    Energy Technology Data Exchange (ETDEWEB)

    Schick, B. [Univ. of Marburg (Germany). Dept. of Ear, Nose and Throat Diseases; Kahle, G. [Univ. of Marburg, (Germany). Inst.of Radiology

    2000-11-01

    Surgery after pre-operative embolization has become the main treatment modality in angiofibroma therapy. As surgical planning is based on precise pre-operative tumour evaluation, knowledge of the characteristic growth patterns is of great interest. Analysis of tumour extension and blood supply, as well as methods of controlling intra-operative bleeding, help in determining the appropriate surgical approach. Though benign, angiofibroma demonstrates a locally aggressive nature. This fibrovascular tumour is characterised by typical radiological findings and by predictable growth patterns. The tumour extension and blood supply can be accurately determined by CT, MR imaging and angiography. With classic radiological findings, no pre-operative biopsy is necessary in most angiofibromas. Advances in radiological imaging have contributed to improved surgical planning and tumour resection. The surgeon is able to select the least traumatic approach with secure haemostatic control, which is also critical for avoiding the disturbance of facial skeletal growth in this group of young patients. Embolization, pre-operative autologous donation and the cell saver system for immediate retransfusion of the collected blood after filtration, are important tools for dealing with blood loss in angiofibroma surgery as they minimize homologous blood transfusion.

  17. Endoscopic Criteria for Evaluating Tumor Stage after Preoperative Chemoradiation Therapy in Locally Advanced Rectal Cancer.

    Science.gov (United States)

    Han, Kyung Su; Sohn, Dae Kyung; Kim, Dae Yong; Kim, Byung Chang; Hong, Chang Won; Chang, Hee Jin; Kim, Sun Young; Baek, Ji Yeon; Park, Sung Chan; Kim, Min Ju; Oh, Jae Hwan

    2016-04-01

    Local excision may be an another option for selected patients with markedly down-staged rectal cancer after preoperative chemoradiation therapy (CRT), and proper evaluation of post-CRT tumor stage (ypT) is essential prior to local excision of these tumors. This study was designed to determine the correlations between endoscopic findings and ypT of rectal cancer. In this study, 481 patients with locally advanced rectal cancer who underwent preoperative CRT followed by surgical resection between 2004 and 2013 at a single institution were evaluated retrospectively. Pathological good response (p-GR) was defined as ypT ≤ 1, and pathological minimal or no response (p-MR) as ypT ≥ 2. The patients were randomly classified according to two groups, a testing (n=193) and a validation (n=288) group. Endoscopic criteria were determined from endoscopic findings and ypT in the testing group and used in classifying patients in the validation group as achieving or not achieving p-GR. Based on findings in the testing group, the endoscopic criteria for p-GR included scarring, telangiectasia, and erythema, whereas criteria for p-MR included nodules, ulcers, strictures, and remnant tumors. In the validation group, the kappa statistic was 0.965 (p < 0.001), and the sensitivity, specificity, positive predictive value, and negative predictive value were 0.362, 0.963, 0.654, and 0.885, respectively. The endoscopic criteria presented are easily applicable for evaluation of ypT after preoperative CRT for rectal cancer. These criteria may be used for selection of patients for local excision of down-staged rectal tumors, because patients with p-MR could be easily ruled out.

  18. Evaluation of PC-based diagnostic radiology workstations

    International Nuclear Information System (INIS)

    Pollack, T.; Brueggenwerth, G.; Kaulfuss, K.; Niederlag, W.

    2000-01-01

    Material and Methods: During February 1999 and September 1999 medical users at the hospital Dresden-Friedrichstadt Germany had tested 7 types of radiology diagnostic workstations. Two types of test methods were used: In test type 1 ergonomic and handling functions were evaluated impartial according to 78 selected user requirements. In test type 2 radiologists and radiographers (3+4) performed 23 work flow steps with a subjectively evaluation. Results: By using a progressive rating no product could fully meet the user requirements. As a result of the summary evaluation for test 1 and test 2 the following compliance rating was calculated for the different products: Rad Works (66%), Magic View (63%), ID-Report (58%), Impax 3000 (53%), Medical Workstation (52%), Pathspeed (46%) and Autorad (39%). (orig.) [de

  19. Quality of life evaluation of workers for diagnostic radiology services

    International Nuclear Information System (INIS)

    Fernandes, Ivani Martins

    2011-01-01

    The main objective of this study was to evaluate the quality of life (QOL) of diagnostic radiology services workers at a hospital of Sao Paulo city. It aimed also to draw the profile of these workers identifying the variables, as its influence on their quality of life. A descriptive exploratory study with qualitative and quantitative approaches was carried out. The data were collected using the questionnaires: the abbreviated instrument for the assessment of the QOL, World Health Organization Quality of Life Instrument bref (WHOQOL-bref) and a questionnaire including the social demographic variables, work conditions and the variables that express the lifestyle of individuals, both questionnaires self-applied. The sample was formed by 118 workers, among them: physicians, technologists/technicians in radiology, nurses, technicians and assistants in nursing, and others health professionals. The data analysis included descriptive statistics, nonparametric tests and the use of a linear regression model. The reliability of the instrument for the studied sample was verified by Cronbach's Alpha Coefficient (α). The WHOQOL-bref proved to be an adequate instrument, with a good level of internal consistency (α=0.884), being easily and quickly administrated for the evaluation of the QOL. The study provided an overview of the perception of quality of life of the studied group. (author)

  20. Research progress of MRI in preoperative evaluation of pituitary adenoma's consistency

    International Nuclear Information System (INIS)

    Lu Yiping; Yin Bo; Geng Daoying

    2013-01-01

    As the most common primary disease in pituitary fossa, the incidence of pituitary adenoma ranks 3rd in the primary tumors of the brain. To remove those resectable pituitary adenomas, there are 2 surgical approaches, named trans-sphenoidal endoscopic surgery and craniotomy. Which approach should be used depends on the size, invasive extension and the consistency of the tumors. The trans-sphenoidal endoscopic surgery is more suitable for the tumors with soft consistency which are easy to pull out, while the craniotomy is suitable for the hard ones. So, preoperative evaluation of the tumors' consistency can help to find the best surgical approach and treatments. MRI is not only an ideal method to show the structure of brain, but also can be used to evaluate consistency of tumor. This review illustrated the forming mechanism of the different consistency of pituitary adenoma and the research process in evaluating the consistency. (authors)

  1. Evaluation of static and dynamic MRI for assessing response of bone sarcomas to preoperative chemotherapy: Correlation with histological necrosis

    International Nuclear Information System (INIS)

    Amit, Priyadarshi; Malhotra, Atul; Kumar, Rahul; Kumar, Lokesh; Patro, Dilip Kumar; Elangovan, Sundar

    2015-01-01

    Preoperative chemotherapy plays a key role in management of bone sarcomas. Postoperative evaluation of histological necrosis has been the gold standard method of assessing response to preoperative chemotherapy. This study was done to evaluate the efficacy of static and dynamic magnetic resonance imaging (MRI) for assessing response preoperatively. Our study included 14 patients (12 osteosarcomas and 2 malignant fibrous histiocytomas) with mean age of 21.8 years, treated with preoperative chemotherapy followed by surgery. They were evaluated with static and dynamic MRI twice, before starting chemotherapy and again prior to surgery. Change in tumor volume and slope of signal intensity - time curve were calculated and correlated with percentage of histological necrosis using Pearson correlation test. The change in dynamic MRI slope was significant (P = 0.001). Also, ≥60% reduction in slope of the curve proved to be an indicator of good histological response [positive predictive value (PPV) =80%]. Change in tumor volume failed to show significant correlation (P = 0.071). Although it showed high negative predictive value (NPV = 85.7%), PPV was too low (PPV = 57.14%). Dynamic MRI correctly predicts histological necrosis after administration of preoperative chemotherapy to bone sarcomas. Hence, it can be used as a preoperative indicator of response to neoadjuvant chemotherapy. On the other hand, volumetric assessment by static MRI is not an effective predictor of histological necrosis. This study proves the superiority of dynamic contrast-enhanced study over volumetric study by MRI

  2. Radiologic evaluation of the globus symptom using videotape recorder

    International Nuclear Information System (INIS)

    Kim, Myeong Jin; Chung, Tae Sub; Lee, Jong Tae; Yoo, Hyung Sik; Suh, Jung Ho; Chang, Tae Young; Park, In Yong

    1988-01-01

    The authors examined barium swallow in 213 patients with globus symptom and 79 patients with vague gastric problems without globus symptom. Abnormal findings were more frequently detected on videorecording than on conventional esophagogram. Radiologic findings were transient cricopharyngeal indentation (CPI), residual barium collection and delayed clearing from hypopharynx (RB), laryngeal penetration of barium, barium retention in vallecula and or pyriform sinuses. Among them residual barium in hypopharynx was more frequently detected in patients with globus symptom than in patients without globus symptom. Globus symptom was more frequent in adult women, but age and sex difference did not affect the incidence of the abnormal radiologic findings. Cricopharyngeal indentation was most frequently seen at the level of C5-6 interspace and had a tendency of moving upward gradually during the indentation in about half of the cases. Most of the CPI was seen in early phase of swallowing and was visible within 1 sec. Residual barium collection was mostly seen in C6 or C6-7 level. RB had no cause and effect relationship with CPI, and it was not secondary result of obstructive effect of CPI. The authors think that videotape recording can be a useful method for evaluation of globus symptom. The residual barium collection in hypopharynx can be a significant finding in globus symptom

  3. Evaluation of a high-level waste radiological maintenance facility

    International Nuclear Information System (INIS)

    Collins, K.J.

    1998-01-01

    The Savannah River Site''s (SRS) Defense Waste Processing Facility (DWPF) near Aiken, SC is the nation''s first and world''s largest high level waste vitrification facility. DWPF began, operations in March 1996 to process radioactive waste, consisting of a matrixed predominantly 137 Cs precipitate and a predominately 90 Sr and alpha emitting sludge, into boro-silicate glass for long term storage. Presently, DWPF is processing only sludge waste and is preparing to process a combination of sludge and precipitate waste. During precipitate operations, canister dose rates are expected to exceed 10 Sv hr -1 (1000 rem hr -1 ). In sludge-only operations, canister contact gamma dose rates are approximately 15 mSv hr -1 (1500 mrem hr -1 ). Transferable contamination levels have been greater than 10 mSv hr -1 (100 cm 2 ) -1 for beta-gamma emitters and into the millions of Bq (100 cm 2 ) -1 for the alpha emitting radionuclides. This paper presents an evaluation of the radiological maintenance areas and their ability to support radiological work

  4. Evaluation of the field size in dental diagnostic radiology system

    International Nuclear Information System (INIS)

    Andrade, P.S.; Potiens, M.P.A.

    2006-01-01

    In this work the field size of a dental X rays machine was evaluated considering the recommendation of the Brazilian Health Ministry Regulation 453 which established basic lines of radiological protection in medical and dental diagnostic radiology. The diameter of the field should not be superior to 6 cm in the localized end point, limiting the radiated area and protecting the head-neck region. The measurements were carried out in a dental X rays machine, Dabi Atlante, model Spectro 70X Seletronic. For the field size or useful beam determination, the intra-oral films were positioned on a plain surface to be exposed in four stages and two focus-film distances (FFD), 20 cm and 27.5 cm: 1) with spacer cone; 2) without spacer cone; 3) with spacer cone and film-holding device; 4) without spacer cone and film-holding device. The results show that the diameter of the field size is satisfactory only for FFD = 20 cm. When the film-holding device is used, which is recommended by the Regulation 453, item 5.8 d(ii), the diameter of the field size exceeds the maximum recommended value of 6 cm. (authors)

  5. Evaluations of gonad and fetal doses for diagnostic radiology.

    Science.gov (United States)

    Tung, C J; Tsai, H Y

    1999-07-01

    A national survey of patient doses for diagnostic radiology was planned in the Republic of China. We performed a pilot study for this survey to develop a protocol of the dose assessments. Entrance skin doses and organ (including ovary, testicle and uterus) doses were measured by thermoluminescent dosimeters and calculated by means of Monte Carlo simulations for several diagnostic procedures. We derived a formula and used the RadComp software for the computation of entrance skin doses. This formula involves several factors, such as kVp, mAs, the focus-to-skin-distance and aluminum filtration. RadComp software was applied to obtain free-air entrance exposures which were converted to entrance skin doses by considering the backscattering radiation from the body. Organ doses were measured using a RANDO phantom and calculated using a mathematical phantom for several diagnostic examinations. Genetically significant doses were calculated from ovary and testicle doses for the evaluation of hereditary effects. Embryo/fetal doses were determined from the uterine doses by considering the increase in uterus size with gestational age. We found that the patient doses studied in this work were all below the reference doses recommended by the National Radiological Protection Board of the U.K.

  6. Radiologic evaluation of adriamycin induced toxic cardiomyopathy in childhood leukemia

    International Nuclear Information System (INIS)

    Kim, Young Joo; Moon, Young Hee; Kang, Kyung Jin; Kim, Ok Hwa; Kim, Choon Yul; Bahk, Yong Whee

    1992-01-01

    The cardiomyopathy associated with Adriamycin is frequently fatal and full clinical recovery is uncommon. To evaluate the radiological manifestation and the outcome of Adriamycin induced cardiac toxicity, we retrospectively reviewed the serial chest X-ray films of children treated with Adriamycin. Among 154 children with leukemia, fourteen patients developed clinical and radiologic evidence of congestive heart failure (CHF). Six out of 14 (43%) died of CHF within 2 weeks after attack and eight children survived after their acute episodes of CHF, were controlled following digoxin and diuretic therapy. Despite the improving clinical evidence of heart failure, the follow-up chest roentgenograms of these 8 children showed definite cardiomegaly as compared with the pre-treatment chest X-ray. Three children among 8 had minimal cardiomegaly and the remaining five children showed persistent, marked cardiomegaly during the period of 9-25 months of follow up. In summary, when CHF develops during chemotherapy in leukemic children, the possibility of Adriamycin induced cardiac toxicity should be suspected. Our findings showed that persistence of cardiomegaly represented significant cardiomyopathy despite clinical improvement of CHF

  7. Preoperative evaluation of myocardial viability by thallium-201 imaging in patients with old myocardial infarction who underwent coronary revascularization

    International Nuclear Information System (INIS)

    Naruse, Hitoshi; Ohyanagi, Mitsumasa; Iwasaki, Tadaaki; Miyamoto, Takashi; Fukuchi, Minoru

    1992-01-01

    The myocardial uptake and redistribution in thallium scintigraphy and the regional wall motion by echocardiography were evaluated by a semi-quantitative method in 42 patients who previously had myocardial infarction (50 target vessels) and underwent coronary revascularization. The aim of this study was to elucidate the significance of the initial image, delayed image and redistribution on thallium-201 scintigraphy for clinical diagnosis of the myocardial viability. As a semi-quantitative analysis, we used a bull's-eye display for thallium image and centerline method for echocardiographic wall motion, and compared the results before and after revascularization. As a result, the thallium grade improved postoperatively in all 17 areas which preoperatively had showed redistribution, and also in 11 of the 32 areas without preoperative redistribution. The sensitivity, specificity and accuracy of preoperative thallium redistribution for predicting myocardial viability were 61%, 100% and 78%, respectively, when the postoperative improvement in the thallium grade was used as the standard. The postoperative probability of improvement in the thallium grade increased in proportion to the preoperative grade (delayed image)(p<0.01). There was no correlation between the preoperative thallium delayed image and postoperative improvement in wall motion. Postoperative improvement in thallium image and wall motion could not be predicted from the preoperative wall motion. Thus, postoperative improvement in thallium images can be anticipated if redistribution is present on the preoperative thallium image, and the preoperative thallium delayed image is useful for predicting myocardial viability. Improvement in wall motion could not be predicted preoperatively by these methods. (author)

  8. Radiological evaluation of cartilage after microfracture treatment: A long-term follow-up study

    International Nuclear Information System (INIS)

    Von Keudell, A.; Atzwanger, J.; Forstner, R.; Resch, H.; Hoffelner, T.; Mayer, M.

    2012-01-01

    Introduction: Recent literature revealed good short-term results after microfracturing (MFX) of isolated focal cartilage defects in the knee joint. Study purpose was a long-term evaluation of patients who received MFX through a multimodal approach, correlating clinical scores and morphological pre- and postoperative MRI-scans. Materials and methods: Between 2000 and 2007 158 patients were treated with MFX for focal femoral or tibial defects at our department. Patients with instabilities, secondary surgical intervention, patellofemoral lesions, a plica mediopatellaris or more than one cartilage defect site and age >55 were excluded. 15 patients were included. Minimum postoperative follow-up (FU) was 18 months (18–78 m). Mean age at surgery was 45 years (27–54), mean FU-interval 48 months (18–78 m). Male to female ratio was 9:6. For clinical assessment the Knee Osteoarthritis Outcome Score (KOOS) and Lysholm Score were used, radiological evaluation was performed with radiographs and 3Tesla-MRI. Results: Clinical knee function was rated good to excellent in 1 patient, fair in 2 and poor in 10 patients. 2/15 patients received full knee replacement due to insufficient cartilage repair through MFX during FU period. Evaluation of pre- and postoperative MRI showed good cartilage repair tissue in 1 (7.7%), moderate repair in 2 (15.4%) and poor fill in 10 patients (76.9%). In these 10 patients the defect size increased. Average defect size preoperatively was 187 mm 2 (range 12–800 mm 2 ) and postoperatively 294 mm 2 (40–800 mm 2 ). The KOOS-Pain averaged 60 (39–94), KOOS-Symptoms 60.6 (21–100), KOOS-ADL 69 (21–91), KOOS-Sports 35.7 (5–60) and KOOS-QUL 37.2 (6–81). The average Lysholm Score was 73.9 (58–94). 10 patients showed a varus leg axis deviation (Ø 5.9°), 3 had a neutral alignment. The alignment correlated positively with KOOS and especially with the Lysholm Score. Conclusion: Our study demonstrated that MFX as a treatment option for cartilage

  9. RADIOLOGICAL AND PATHOLOGICAL EVALUATION OF TRICHILEMMAL CYSTS OF THE SCALP

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    Deb Kumar Boruah

    2017-09-01

    Full Text Available BACKGROUND Trichilemmal cysts or pilar tumours are slow growing scalp lesion commonly found in elderly women. These slow growing lesions may cause morbidity and even mortality. Recurrence of the lesions after local excision is common. These trichilemmal cyst usually indolent with benign nature or may transform to proliferating trichilemmal cyst or Proliferating Pilar Tumour (PPT or may show malignant transformation. The aim of the study is to study the radiological and pathological evaluation of trichilemmal cysts of scalp. MATERIALS AND METHODS A hospital-based cross-sectional retrospective study was conducted. The study group comprised of 20 patients presenting to the Departments of Radiodiagnosis, Radiotherapy, General Surgery, Plastic Surgery and Dermatology in a tertiary care hospital from July 2015 to August 2017. All patients were initially evaluated clinically followed by cross-sectional imaging modality like Computed Tomography (CT or Magnetic Resonance Imaging (MRI. RESULTS In 20 patients, a total of 51 trichilemmal cysts were evaluated where 46 (90.2% were benign trichilemmal cysts and 5 (9.8% showed malignant transformation. The mean age of presentation was 47.9 yrs. ± 1.5 (SD with male:female ratio of 1:3.The mean duration of presence of trichilemmal cyst was 5.9 yrs. ± 3.2 (SD. Out of 5 malignant trichilemmal cysts 3 patients (15% showed bony calvarial erosion and 2 patients (10% showed intracranial extensions. Statistical significance with ‘p’ value of 0.003 was noted between the size of largest dimension of trichilemmal cyst and their histopathology without any statistical significance between duration of swelling and their histopathology. CONCLUSION Even though, the trichilemmal cysts of scalp are denoted as benign lesion, as they usually shows recurrence and its affinity to become locally aggressive and turn into malignancy is there. Hence, clinical, radiological and pathological correlation isnecessary to decreased

  10. Evaluation of preoperative radiation combined with chemotherapy for prevention of local recurrence of rectal cancer

    International Nuclear Information System (INIS)

    Sarashina, Hiromi; Inoue, Ikuo; Saitoh, Norio

    1990-01-01

    A retrospective study of 44 patients with rectal cancer who received preoperative radiation (42.6 Gy) combined with chemotherapy and 37 who received resection alone (control group) was undertaken to evaluate the effect of preoperative radiation therapy on local recurrence of rectal cancer. The rate of local recurrence in the radiation group was reduced to 4.5% compared with that in the controls (18.9%). From a pathological point of view, factors that have a close association with recurrence, such as depth of invasion, ew (defined as the distance between the external surgical surface and the deepest site of invasion) and lymph nodal involvement, have been successfully changed after radiation therapy. It was also evident that the rate of recurrence in irradiated patients, depth of invasion of a 2 (defined as the invasion of cancer far beyond the muscle layer but without involvement of other organs) or ew less than 2 mm was significantly lower than in patients with the same pathological conditions in whom radiation was not used. However, especially in patients with remote lymph node metastasis, there was no difference in local recurrence rate between the two groups. From these findings, it was concluded that a careful follow up is necessary for patients with remote lymph node involvement even after radiation therapy. (author)

  11. The value of MR cholangiography in preoperative evaluation of biliary anatomy of living liver donors

    International Nuclear Information System (INIS)

    Yu Zhefeng; Zhou Min; Peng Zhiyi

    2009-01-01

    Objective: To determine the value of MR cholangiography(MRC) in the preoperative evaluation of biliary anatomy of living liver donors. Methods: Fifty eight consecutive donors underwent MRC examinations and living liver transplantation. MRC was performed on a 1.5 T scanner with breath-hold rapid acquisition of T 2 WI slab and breathing-gating 3D FSE T 2 WI. Images of MRC and IOC were compared and classified according to the modified Huang's classification. Results: Thirty four (58.6%) liver donors showed normal biliary anatomy on IOC, and 24 (41.4%) donors revealed variant bile anatomy. MRC correctly depicted biliary anatomy in 91.4% (53/58) donors. The sensitivity, specificity, positive predictive value and negative predictive value of MRC in distinguishing normal and different types of variant biliary anatomy were 83.3% (20/24), 100% (34/34), 100% (20/20), 89.5% (34/38) respectively. Conclusion: MRC can accurately assess the biliary anatomy in living liver donors and may guide the preoperative planning of liver transplant. (authors)

  12. Clinical Study Preoperative Evaluation with f MRI of Patients with Intracranial Gliomas Ioannis

    International Nuclear Information System (INIS)

    Kapsalakis, Z.; Hadjigeorgiou, G.; Papadimitriou, A.; Kapsalaki, E.Z.; Fezoulidis, I.; Gotsis, E.D.; Verganelakis, D.; Toulas, P.; Chung, I.; Robinson, J.S.; Lee, J.P.; Fountas, K.N.; Fountas, K.N.

    2012-01-01

    Aggressive surgical resection constitutes the optimal treatment for intracranial gliomas. However, the proximity of a tumor to eloquent areas requires exact knowledge of its anatomic relationships to functional cortex. The purpose of our study was to evaluate f MRI’s accuracy by comparing it to intraoperative cortical stimulation (DCS) mapping. Material and Methods. Eighty-seven patients, with presumed glioma diagnosis, underwent preoperative fMRI and intraoperative DCS for cortical mapping during tumor resection. Findings of fMRI and DCS were considered concordant if the identified cortical centers were less than 5 mm apart. Pre and postoperative Karnofsky Performance Scale and Spitzer scores were recorded. A postoperative MRI was obtained for assessing the extent of resection. Results. The areas of interest were identified by f MRI and DCS in all participants. The concordance between f MRI and Dncs was 91.9% regarding sensory-motor cortex, 100% for visual cortex, and 85.4% for language. Data analysis showed that patients with better functional condition demonstrated higher concordance rates, while there also was a weak association between tumor grade and concordance rate. The mean extent of tumor resection was 96.7%. Conclusions. Functional MRI is a highly accurate preoperative methodology for sensory-motor mapping. However, in language mapping, DCS remains necessary for accurate localization

  13. The usefulness of myocardial SPECT for the preoperative cardiac risk evaluation in noncardiac surgery

    International Nuclear Information System (INIS)

    Lim, Seok Tae; Lee, Dong Soo; Kang, Won Jon; Chung, June Key; Lee, Myung Chul

    1999-01-01

    We investigated whether myocardial SPECT had additional usefulness to clinical, functional or surgical indices for the preoperative evaluation of cardiac risks in noncardiac surgery. 118 patients ( M: F=66: 52, 62.7±10.5 years) were studied retrospectively. Eighteen underwent vascular surgeries and 100 nonvascular surgeries. Rest Tl-201/ stress Tc-99m-MIBI SPECT was performed before operation and cardiac events (hard event: cardiac death and myocardial infarction; soft event: ischemic ECG change, congestive heat failure and unstable angina) were surveyed through perioperative periods (14.6±5.6 days). Clinical risk indices, functional capacity, surgery procedures and SPECT findings were tested for their predictive values of perioperative cardiac events. Peri-operative cardiac events occurred in 25 patients (3 hard events and 22 soft events). Clinical risk indices, surgical procedure risks and SPECT findings but functional capacity were predictive of cardiac events. Reversible perfusion decrease was a better predictor than persistent decrease. Multivariate analysis sorted out surgical procedure risk (p=0.0018) and SPECT findings (p=0.0001) as significant risk factors. SPECT could re-stratify perioperative cardiac risks in patients ranked with surgical procedures. We conclude that myocardial SPECT provides additional predictive value to surgical type risks as well as clinical indexes or functional capacity for the prediction of preoperative cardiac events in noncardiac surgery

  14. Clinical evaluation of preoperative arterial infusion chemotherapy and surgical operation for colorectal carcinoma

    International Nuclear Information System (INIS)

    Yuan Jianhua; Zhao Zhongsheng; Deng Gaoli; Hu Tingyang; Yu Wenqiang; Chen Fanghong; Luo Zuyan; Ru Guoqing; Dong Quanjin; Tu Shiliang

    2003-01-01

    Objective: To investigate the clinical values of preoperative arterial infusion chemotherapy and surgical operation for colorectal carcinoma. Methods: 66 patients with colorectal carcinoma were subjected to percutaneous femoral artery catheterization by Seldinger's technique with infusion of anti-cancer drugs. The resection was performed 5-30 days after the arterial infusion (mean 12 days). In 50 surgical specimens of the 66 cases, histological findings were evaluated including the density and distribution of the apoptosis cells under the observation by DNA nick end labelling technique. Of which 22 specimens before arterial infusion chemotherapy (got from biopsy of preoperation) and 25 normal mucosa (got from normal surgical specimens) were used as controls. Results: The total histological response rate was 100% with grade I in 20 cases, grade II in 21 cases, grade III in 9 cases. The densities of the apoptosis cells were 31.47 ± 5.58 before arterial infusion chemotherapy, 76.69 ± 17.12 after arterial infusion chemotherapy and 8.01 ± 3.39 in normal mucosa. The density of the apoptosis cells after arterial infusion chemotherapy was significantly higher than that before arterial infusion chemotherapy (P 2 =4.696, P>0.30). There were no significant differences in the apoptosis of adenocarcinoma during different pathological stages (F=0.001376, P>0.05). Conclusions: Peroperative transcatheter arterial infusion chemotherapy resulting in apoptosis of adenocarcinoma, can raise the radical operation rate, and prolong survival rate for colorectal carcinoma patients

  15. Radiologic evaluation of the maxillary natural pathologic conditions in children

    International Nuclear Information System (INIS)

    Prk, Tae Won; Choi, Soon Chul

    1992-01-01

    The authors evaluated the distribution of the antral pathologic conditions and their radiographic features on the Waters' radiographs of 151 children patients who had been radiographed at the department of Oral Radiology, Seoul National University Hospitals. The obtained results were as follows : 1. The most common pathologic condition was inflammatory change (58%). Percentage of cases showing cystic lesion and fibro-osseous lesion were 25% and 11% respectively. 2. In cases of inflammatory change, odontogenic origins were 12 cases (13%) and bilateral occurrences were 37 cases (39%). 3. The most common radiographic feature of the inflammatory conditions was various types of mucosal thickening (78%). Percentage of cases showing totally increased radiopacity was 18%. 4. Intrinsic cystic lesions were 26 cases (65%) and dentigerous cyst was the most common extrinsic cyst. 5. Most of the fibro-osseous lesions (15 from 17 cases) were fobrous dysplasea. 6. Maxillary sinus hypoplasia (5 cases) and Burkitt's lymphoma (4 cases) were also observed.

  16. Radiologic evaluation of the maxillary natural pathologic conditions in children

    Energy Technology Data Exchange (ETDEWEB)

    Prk, Tae Won; Choi, Soon Chul [Dept. of Oral Radiology, College of Dentistry, Seoul National University, Seoul (Korea, Republic of)

    1992-08-15

    The authors evaluated the distribution of the antral pathologic conditions and their radiographic features on the Waters' radiographs of 151 children patients who had been radiographed at the department of Oral Radiology, Seoul National University Hospitals. The obtained results were as follows : 1. The most common pathologic condition was inflammatory change (58%). Percentage of cases showing cystic lesion and fibro-osseous lesion were 25% and 11% respectively. 2. In cases of inflammatory change, odontogenic origins were 12 cases (13%) and bilateral occurrences were 37 cases (39%). 3. The most common radiographic feature of the inflammatory conditions was various types of mucosal thickening (78%). Percentage of cases showing totally increased radiopacity was 18%. 4. Intrinsic cystic lesions were 26 cases (65%) and dentigerous cyst was the most common extrinsic cyst. 5. Most of the fibro-osseous lesions (15 from 17 cases) were fobrous dysplasea. 6. Maxillary sinus hypoplasia (5 cases) and Burkitt's lymphoma (4 cases) were also observed.

  17. Evaluation of radiological teaching programs in the Internet

    International Nuclear Information System (INIS)

    Seitz, J.; Schubert, S.; Voelk, M.; Scheibl, K.; Paetzel, C.; Schreyer, A.; Djavidani, B.; Feuerbach, S.; Strotzer, M.

    2003-01-01

    Evaluation of web based training programs,which can be contacted from the homepages of radiological departments of German universities.Material and method From june 2000 to january 2002 the 75 web based training programs of 57 providers,which can be contacted from the web pages of the radiological departments of german universities were evaluated in a prospective study.A medical student experienced in using the world wide web examined each training program three times in an interval of six months using the following criteria: availability of the web sites,target group,kind of training program,contents and structure and the technical solution. 51 of the 57 the homepages were fully available at each visit. 64 of the 75 web based training programs which could be connected from these sites were available at all three visitis.One program was only partially available at one spot check. 8 of the 75 programs were designed for physicians and medically trained personal, 23 were made for medical students and 44 addressed both target groups (partially more than once mentioned).The number of the presented cases ranged between one single and 3700. In 31 of 75 training programs links to other teaching files were found.A complete presentation of cases was presented by 48 of the 75 web sites.5 of the 75 web sites offered physiological images for comparison. In 20 training programs the pathological changes were optically marked in the x-ray images.A logical and didactical structure was found in 24 teaching files, 14 gave the possibility to check the learning results.No provider made use of the possibility to pass credits to the students or physicians acount with regard to official training programs. Multimedia techniques were used in 15 training programs.43 sites used data reduced preview images (thumbnails).The latest update of the site is mentioned in 55 of the 75 web sites. 19 of 57 providers had either no possibility of contact or did not answer to an e-mail. From the homepages

  18. An attempt to evaluate the risks associated with radiological terror

    International Nuclear Information System (INIS)

    Paschoa, A.S.; Dantas, B.M.

    2014-01-01

    The evaluation of the risk of a terrorist attack has been made frequently by multiplying the probability of occurrence of a terrorist attempt by the probability of its success and a quantity which represents the consequences of a successful attack. In the case of a radiological attack the consequences will vary in case the action will be active or passive. Thirteen radionuclides were examined for their potential uses in credible threats or terrorist attacks based on their availability from laboratories and hospitals. Taking into account the dose conversion coefficients published by the International Atomic Energy Agency, those radionuclides with higher dose effectiveness for ingestion are the following: 210 Po; 226 Ra and 241 Am. Other radionuclides which can be used in threats and terror attacks, like 137 Cs for example have also been examined. The risks associated with the selected radionuclides have been tentatively ranked as high, medium, or low. The probability used to evaluate risks depends on the motivation of the terrorist and the capacity, which implies availability or the actual possibility of obtaining a particular radionuclide. On the other hand, whenever a list of radionuclides to be used in a malevolent action is available to a terrorist, the choice of the most adequate will depend also on the action to be undertaken. This work ranks risks associated with radiological terror based on physical, chemical, radio-toxicological and other relevant data on radionuclides, which were either already used in terror attacks, or were pointed out as adequate to be used in such malevolent actions. (author)

  19. The Usefulness of the Preoperative Magnetic Resonance Imaging Findings in the Evaluation of Tarsal Tunnel Syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Hyun Jin; Lee, Sheen Woo; Jeong, Yu Mi; Choi, Hye Young; Kim, Hyung Sik [Dept. of Radiology, Gil Hospital, Gacheon University College of Medicine, Incheon (Korea, Republic of); Park, Hong Gi; Kwak, Ji Hoon [Dept. of Orthopedic Surgery, Gil Hospital, Gacheon University College of Medicine, Incheon (Korea, Republic of)

    2012-02-15

    The purpose of this study was to access the diverse conditions that lead to the clinical manifestations of tarsal tunnel syndrome and evaluate the usefulness of magnetic resonance imaging (MRI) in preoperative evaluation. Thirty-three patients who underwent ankle MRI and surgery under the impression of tarsal tunnel syndrome were retrospectively analyzed. The findings on ankle MRI were categorized into space occupying lesions within the tarsal tunnel, space occupying lesions of the tunnel wall, and non-space occupying lesions. Associated plantar muscle atrophy was also evaluated. Medical records were reviewed for correlation of nerve conduction velocity (NCV) and surgical findings. There were 21 space occupying lesions of the tarsal tunnel, and eight lesions of tarsal tunnel wall. There were three cases with accessory muscle, three with tarsal coalition, five with ganglion cysts, one neurogenic tumor, five flexor retinaculum hypertrophy, three varicose veins, and nine with tenosynovitis of the posterior tibialis, flexor digitorum longus, or flexor hallucis longus tendon. One patient was found to have a deltoid ligament sprain. Of the 32, eight patients experienced fatty atrophic change within any one of the foot muscles. NCV was positive in 79% of the MRI-positive lesions. MRI provides detailed information on ankle anatomy, which includes that of tarsal tunnel and beyond. Pathologic conditions that cause or mimic tarsal tunnel syndrome are well demonstrated. MRI can enhance surgical planning by indicating the extent of decompression required, and help with further patient management. Patients with tarsal tunnel syndrome can greatly benefit from preoperative MRI. However, it should be noted that not all cases with tarsal tunnel syndrome have MRI-demonstrable causes.

  20. The Usefulness of the Preoperative Magnetic Resonance Imaging Findings in the Evaluation of Tarsal Tunnel Syndrome

    International Nuclear Information System (INIS)

    Jung, Hyun Jin; Lee, Sheen Woo; Jeong, Yu Mi; Choi, Hye Young; Kim, Hyung Sik; Park, Hong Gi; Kwak, Ji Hoon

    2012-01-01

    The purpose of this study was to access the diverse conditions that lead to the clinical manifestations of tarsal tunnel syndrome and evaluate the usefulness of magnetic resonance imaging (MRI) in preoperative evaluation. Thirty-three patients who underwent ankle MRI and surgery under the impression of tarsal tunnel syndrome were retrospectively analyzed. The findings on ankle MRI were categorized into space occupying lesions within the tarsal tunnel, space occupying lesions of the tunnel wall, and non-space occupying lesions. Associated plantar muscle atrophy was also evaluated. Medical records were reviewed for correlation of nerve conduction velocity (NCV) and surgical findings. There were 21 space occupying lesions of the tarsal tunnel, and eight lesions of tarsal tunnel wall. There were three cases with accessory muscle, three with tarsal coalition, five with ganglion cysts, one neurogenic tumor, five flexor retinaculum hypertrophy, three varicose veins, and nine with tenosynovitis of the posterior tibialis, flexor digitorum longus, or flexor hallucis longus tendon. One patient was found to have a deltoid ligament sprain. Of the 32, eight patients experienced fatty atrophic change within any one of the foot muscles. NCV was positive in 79% of the MRI-positive lesions. MRI provides detailed information on ankle anatomy, which includes that of tarsal tunnel and beyond. Pathologic conditions that cause or mimic tarsal tunnel syndrome are well demonstrated. MRI can enhance surgical planning by indicating the extent of decompression required, and help with further patient management. Patients with tarsal tunnel syndrome can greatly benefit from preoperative MRI. However, it should be noted that not all cases with tarsal tunnel syndrome have MRI-demonstrable causes.

  1. Radiologic evaluation of intestinal obstruction in the neonates

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    Kim, Jin Hee; Kim, Dong Woo; Lee, Eun Suk; Kwon, Sun Young [Eul Ji General Hospital, Daejeon (Korea, Republic of); Lee, Sang Young [Chonbuk National University College of Medicine, Jeonju (Korea, Republic of); Kang, Hye Jeong [Eul Ji General Hospital, Seoul (Korea, Republic of)

    1995-10-15

    The purpose of this study is to evaluate the radiologic findings of the intestinal obstruction in the neonate according to the causes and to determine the findings useful for the differential diagnosis. The materials consisted of 29 neonates with surgically proven gastrointestinal tract obstruction. We analyzed simple abdominal radiography and barium study comparing with the operative findings. The causes of intestinal obstruction were gastric atresia in 1 case, duodenal atresia in 3 cases, small bowel atresia in 11 cases (jejunal; 3 cases, ileal; 8 cases), colonic atresia in 2 cases, Hirschsprung's disease in 9 cases, ano-rectal anomaly in 6 cases, midgut volvulus in 2 cases, and Meckel's diverticulum in 1 case. Vomiting was noted in the all cases. The abdominal distension was not noted in the cases of gastric atresia, duodenal atresia, and proximal jejunal atresia. The meconium passage was noted in 2 cases of ileal atresia and 3 cases of Hirschsprung's disease. On barium study, site of obstruction was predicted accurately in gastric atresia, duodenal atresia, proximal jejunal atresia, and colonic atresia but it was not possible in distal jejunal atresia and ileal atresia. The microcolon was noted in 2 cases of jejunal atresia, 4 cases of ileal atresia, and 2 cases of colonic atresia. Out of 9 Hirschsprung's disease transition zones were seen on rectum or rectosigmoid junction in 7 cases and barium study was normal in 2 cases. In the diagnosis of neonatal intestinal obstruction, the basic radiologic studies such as simple abdominal radiography and gastrointestinal contrast study was useful for the differential diagnosis of the proximal bowel loop atresia colonic atresia, and midgut volvulus.

  2. Radiologic evaluation of intestinal obstruction in the neonates

    International Nuclear Information System (INIS)

    Kim, Jin Hee; Kim, Dong Woo; Lee, Eun Suk; Kwon, Sun Young; Lee, Sang Young; Kang, Hye Jeong

    1995-01-01

    The purpose of this study is to evaluate the radiologic findings of the intestinal obstruction in the neonate according to the causes and to determine the findings useful for the differential diagnosis. The materials consisted of 29 neonates with surgically proven gastrointestinal tract obstruction. We analyzed simple abdominal radiography and barium study comparing with the operative findings. The causes of intestinal obstruction were gastric atresia in 1 case, duodenal atresia in 3 cases, small bowel atresia in 11 cases (jejunal; 3 cases, ileal; 8 cases), colonic atresia in 2 cases, Hirschsprung's disease in 9 cases, ano-rectal anomaly in 6 cases, midgut volvulus in 2 cases, and Meckel's diverticulum in 1 case. Vomiting was noted in the all cases. The abdominal distension was not noted in the cases of gastric atresia, duodenal atresia, and proximal jejunal atresia. The meconium passage was noted in 2 cases of ileal atresia and 3 cases of Hirschsprung's disease. On barium study, site of obstruction was predicted accurately in gastric atresia, duodenal atresia, proximal jejunal atresia, and colonic atresia but it was not possible in distal jejunal atresia and ileal atresia. The microcolon was noted in 2 cases of jejunal atresia, 4 cases of ileal atresia, and 2 cases of colonic atresia. Out of 9 Hirschsprung's disease transition zones were seen on rectum or rectosigmoid junction in 7 cases and barium study was normal in 2 cases. In the diagnosis of neonatal intestinal obstruction, the basic radiologic studies such as simple abdominal radiography and gastrointestinal contrast study was useful for the differential diagnosis of the proximal bowel loop atresia colonic atresia, and midgut volvulus

  3. MR imaging and MR angiography in preoperative evaluation of intracranial meningiomas

    International Nuclear Information System (INIS)

    Goldmann, A.; Kunz, U.; Bader, C.; Leibing, U.; Friedrich, J.M.; Oldenkott, P.

    1994-01-01

    A group of 41 patients with intracranial meningiomas were examined by MR imaging (MRI) and MR angiography (MRA) to assess the clinical value of MRA in the preoperative evaluation of these patients. The results of MRA were compared with the results of intraarterial cerebral catheter X-ray angiography (XRA; n 19) and with the operative findings (n = 41). Our results showed a good correlation between MRA and XRA/surgery in demonstrating the relationship between the tumor and adjacent venous and arterial structures. Use of MRA was also helpful in demonstrating the degree of intrinsic tumor vascularity. It also supplied important information for operative planning. Adjunct XRA was mandatory if detailed information about tumor-feeding vessels was requested by the neurosurgeon, especially in highly vascularized angiomatous meningiomas and in meningiomas suspected of tumor feeding by vessels of the internal carotid artery. (orig.)

  4. MR imaging and MR angiography in preoperative evaluation of intracranial meningiomas

    Energy Technology Data Exchange (ETDEWEB)

    Goldmann, A. [Dept. of Diagnostic Radiology, Univ. of Ulm (Germany); Kunz, U. [Dept. of Neurosurgery, Military Hospital, Academic Hospital of the University, Ulm (Germany); Bader, C. [Dept. of Diagnostic Radiology, Univ. of Ulm (Germany); Leibing, U. [Dept. of Diagnostic Radiology, Univ. of Ulm (Germany); Friedrich, J.M. [Dept. of Diagnostic Radiology, Univ. of Ulm (Germany); Oldenkott, P. [Dept. of Neurosurgery, Military Hospital, Academic Hospital of the University, Ulm (Germany)

    1994-12-01

    A group of 41 patients with intracranial meningiomas were examined by MR imaging (MRI) and MR angiography (MRA) to assess the clinical value of MRA in the preoperative evaluation of these patients. The results of MRA were compared with the results of intraarterial cerebral catheter X-ray angiography (XRA; n = 19) and with the operative findings (n = 41). Our results showed a good correlation between MRA and XRA/surgery in demonstrating the relationship between the tumor and adjacent venous and arterial structures. Use of MRA was also helpful in demonstrating the degree of intrinsic tumor vascularity. It also supplied important information for operative planning. Adjunct XRA was mandatory if detailed information about tumor-feeding vessels was requested by the neurosurgeon, especially in highly vascularized angiomatous meningiomas and in meningiomas suspected of tumor feeding by vessels of the internal carotid artery. (orig.)

  5. Preoperative chemotherapy of bone and soft tissue sarcomas. Evaluation with dynamic MR imaging

    International Nuclear Information System (INIS)

    Ando, Yoko; Fukatsu, Hiroshi; Isomura, Takayuki; Itoh, Shigeki; Ishigaki, Takeo; Yamamura, Shigeki; Sugiura, Hideshi; Satoh, Keiji.

    1995-01-01

    Dynamic MR imaging and conventional angiography were performed in eleven patients with musculoskeletal malignant tumors before and after preoperative chemotherapy in order to evaluate its effect. Dynamic MRI was obtained with GRASS (TR/TE/FA=50/10-13/30) or SE (TR/TE=150-350/20). Although resected specimen in one case of osteosarcoma had the necrotic ratio of more than 90%, it had marked early enhancement in dynamic MRI, and microscopic examination revealed fibrotic necrosis with many capillaries. In soft tissue sarcomas with hemorrhage and/or cystic change, dynamic MRI findings did not necessarily correlate with the chemotherapy effect. Dynamic MRI was more useful than angiography because of its ability to show tumor vascularity and of its non-invasiveness. (author)

  6. Using 3 Tesla magnetic resonance imaging in the pre-operative evaluation of tongue carcinoma.

    Science.gov (United States)

    Moreno, K F; Cornelius, R S; Lucas, F V; Meinzen-Derr, J; Patil, Y J

    2017-09-01

    This study aimed to evaluate the role of 3 Tesla magnetic resonance imaging in predicting tongue tumour thickness via direct and reconstructed measures, and their correlations with corresponding histological measures, nodal metastasis and extracapsular spread. A prospective study was conducted of 25 patients with histologically proven squamous cell carcinoma of the tongue and pre-operative 3 Tesla magnetic resonance imaging from 2009 to 2012. Correlations between 3 Tesla magnetic resonance imaging and histological measures of tongue tumour thickness were assessed using the Pearson correlation coefficient: r values were 0.84 (p Tesla magnetic resonance imaging had 83 per cent sensitivity, 82 per cent specificity, 82 per cent accuracy and a 90 per cent negative predictive value for detecting cervical lymph node metastasis. In this cohort, 3 Tesla magnetic resonance imaging measures of tumour thickness correlated highly with the corresponding histological measures. Further, 3 Tesla magnetic resonance imaging was an effective method of detecting malignant adenopathy with extracapsular spread.

  7. Role of multislice CT and magnetic resonance cholangiography in preoperative evaluation of potential donor in living related liver transplantation

    Directory of Open Access Journals (Sweden)

    Hossam M. Abdel-Rahman

    2016-03-01

    Conclusion: Multislice CT is a valuable tool in the evaluation of potential living liver donors that provides complete information on the hepatic vascular anatomy, the liver parenchyma, and volumetric measurements. MRC with a 3.0-T MR system demonstrates the preoperative biliary evaluation very well with a high accuracy rate.

  8. CLINICAL EVALUATION OF EFFECTIVENESS OF ITRACONAZOLE IN PREOPERATIVE AND REFRACTORY POSTOPERATIVE PATIENTS OF ALLERGIC FUNGAL SINUSITIS

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    Ch. Venkatasubbaiah

    2016-07-01

    Full Text Available BACKGROUND Allergic Fungal Sinusitis (AFS is a noninvasive type of fungal sinusitis, clinically and pathologically a unique entity of chronic rhinosinusitis. The aetiology, pathogenesis, and treatment of AFS are subject to controversy. In spite of aggressive endoscopic surgery, pre- and postoperative steroids and immunotherapy recurrence rates are high. Many additions are made to its original description and management since its early description in 1980. The aim of the present paper was to evaluate clinically. The response to high-dose itraconazole before endoscopic sinus surgery and in refractory postoperative patients. Related literature was reviewed in the light of the present study. MATERIALS AND METHODS A 2 year prospective study conducted on 68 AFS patients divided into two groups to clinically evaluate the results after using oral itraconazole preoperatively in one group and in refractory postoperative period in another. RESULTS The mean age of patients with typical AFS was 36±3.9 years. Patients with AFS with an average follow up of 21 months were included. Recurrence was 6/34 (17.64% in itraconazole group and revision FESS done in 3/34 (08.82%. Recurrence in patients without itraconazole was 16/34 (47.05% and refractory to conventional treatment, but responded to itraconazole in 14/16 (87.50%. Revision surgery required in 2/16 (12.50% after starting oral itraconazole. No side effects or reactions were observed in a total of 7920 doses administered. CONCLUSION Itraconazole is well tolerated by patients and effective in shrinking the polyposis preoperatively with low recurrence. Postoperative refractory AFS is amenable in (87.50% of patients avoiding repeat FESS. Overall, low recurrence rate and minimizing revision surgery when compared to patients treated without itraconazole was evident in the study.

  9. Usefulness of preoperative chest multidetector CT for evaluation of breast cancer: comparison with breast MRI

    International Nuclear Information System (INIS)

    Chang, Yun Woo; Kim, Dong Hun; Lee, Min Hyuk

    2005-01-01

    To evaluate the efficacy of chest multidetector-row helical computed tomography (MDCT) in detecting breast cancer in preoperative metastasis work-ups and to assess the accuracy of MDCT compared with magnetic resonance imaging (MRI). MDCT were performed on 69 consecutive patients with 94 lesions of histologically proven breast cancer. Retrospectively, two radiologists performed a blind review of the MDCT images for margin, shape, mass enhancement pattern and the enhancing distribution of non-mass lesions with consensus. CT attenuation values were measured in the average HU on pre-enhancing and enhanced CT in gland, fat, muscle, and in masses with the largest region of interest (ROI). MDCT finding were analyzed and compared with breast MRI. Of the 91 breast lesions detected on MDCT, 64 were mass lesions and 24 were non-mass lesions on enhancement, 86 lesions were malignant and 5 were benign. Three pathologically proven malignant masses were not detected on MDCT. Positive predictive value, false positive rate and false negative rate were 94.5%, 5.3%, 3.2% respectively. The highly predictive features for malignancy were a spiculated or irregular margin, an irregular of round shape, and a heterogeneously or rim enhanced mass. Another highly predictive feature for malignancy was linear or segmentally distributed enhancing non-mass lesions. The CT values of masses in pre-enhanced scans were 38.6 ± 7.9 HU; these values increased to 110.9 ± 26.6 HU after contrast injection (90 sec). The attenuation values from enhancing CT of malignant lesions were significantly higher than those of non-enhancing lesions. The depiction of enhancing masses on MDCT compared with MR imaging were 88.6%. The extension of malignancy were equally well correlated MDCT with MR imaging. The diagnostic value of chest MDCT for preoperative staging is comparable with MR imaging for the detection and extension of lesions. Therefore, chest MDCT of breast cancer can add to the information obtained from

  10. Common carotid artery thrombosis; Clinical and radiological evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Ito, Yasuhiro; Yasuda, Takeshi; Hakusui, Shigetaka; Yanagi, Tsutomu (Nagoya Daini Red Cross Hospital (Japan)); Ito, Eiichi

    1994-02-01

    Common carotid artery thrombosis (CCAT) is not common. We studied 4 patients with CCAT to clarify the clinical and radiological features of this disorder. Case 1 had only episodes of TIA. Case 2 was diagnosed by chance as having CCAT at the time of admission due to cerebellar infarction. On the contrary, Cases 3 and 4 were admitted because of disturbance of consciousness and hemiparesis. Case 4 died soon after his stroke because of complications. We evaluated cases 1, 2 and 3 using head CT, head MRI, neck MRI, MR angiography, SPECT and cerebral angiography. Case 4, who was evaluated with head CT and cerebral angiography, was autopsied to confirm the occlusion of the common carotid artery. The clinical severity of CCAT varies from asymptomatic to severe, because each case differs in the time taken for complete occlusion of the common carotid artery; the development of collateral circulation; and hemodynamics of the brain. As for the collaterals their contribution is variable; for example, the thyrocervical and other arteries function as the bypass. We can diagnose CCAT easily and noninvasively using MR angiography and neck MRI based on disappearance of the flow void in the common carotid artery or internal carotid artery. On physical examination, it is important to detect faded pulsation of the superficial temporal artery that is ipsilateral to the occluded common carotid artery. (author).

  11. RADIOLOGICAL EVALUATION OF OBSTRUCTIVE JAUNDICE BY ULTRASOUND AND CT

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    Padmalatha

    2015-10-01

    Full Text Available INTRODUCTION: The goals of any radiologic procedure in obstructive Jaundice are to confirm the presence of bile duct obstruction, its location, its extent & the probable cause. It should also attempt to obtain a map of the biliary tree that will help the surgeon to det ermine the best approach to each individual case. OBJECTIVES: 1. To evaluate the role of Ultrasound and CT in patients presenting with clinical features of obstructive jaundice. 2. To evaluate the causes of obstructive jaundice by Ultrasound and CT. PATIENTS AND METHODS: The study was carried with 45 patients from January 2006 to September 2007 who were attending the surgical and Gastroenterology Departments, Govt. General Hospital, Kurnool, which is an attached hospital to Kurnool Medical College, Kurnool. O BSERVATIONS AND RESULTS: In our study, there is female predominance with male: female ratio 1: 1.6.Majority of patients are in age group of 41 - 50 years. Jaundice was the commonest presentation in all patients followed by pruritis in 72% and pain abdomen in 67% of patients. Ultrasound identified the benign cause of biliary obstruction in 79.1% cases and the malignant cause in 61.9% cases. CT identified the benign cause of biliary obstruction in 91.6% of patients and the malignant cause in 80.9% cases.

  12. Preoperative evaluation of liver volume parameters in living related donors by spiral computed tomography

    International Nuclear Information System (INIS)

    Michalak, M.; Pacho, R.; Pruszynski, B.; Paluszkiewicz, R.; Hevelke, P.; Krawczyk, M.

    2002-01-01

    The objective of the study is to assess the use of spiral computed tomography in the evaluation of the volume of the liver, its lobes, and selected segments in the preoperative period and to validate the used measurements. Thirty five potential donors (15 women and 20 men) aged 21-65 years were included. Based on the CT liver findings in the venous-portal phase and segment division of the liver according Couinaud the liver volume was calculated manually be a planimetric method, after making outlines of all liver sections. The volumes of lobes and selected segments were assessed by the same technique. The volumes of the resected liver segments calculated based on the CT findings were compared with appropriate measurements made during the operation. The total liver volume ranged between 804 and 1842 cm 3 (mean - 1456 cm 3 , standard deviation [SD] - 247). The volume of the right liver lobe including caudate lobe was 555 cm 3 to 1382 cm 3 (mean - 1024, SD - 186) that is in average 70.4% of the total liver volume. The volume of the left liver lobe ranged between 156 and 778 cm 3 (mean - 431, SD - 123) that is in average 29.6% of the total liver volume. The volume of segments 2+3 was 72 to 426 cm 3 (mean - 237 cm 3 , SD - 79) that is in average 16.2% of the total liver volume. The volume of the segment 4 ranged between 84 and 366 cm 3 (mean - 196, SD - 70) that is in average 13.4% of the total liver volume. CT makes possible to assess the volume of the liver, of its lobes and selected segments and it is an important modality for the classification of method of operation (segmentectomy, left hepatectomy, right hepatectomy). This method is accurate and reproducible. The liver part volumes calculated preoperatively in the majority of cases revealed to be smaller than in reality in average of 12.1%. (author)

  13. Role of contrast-enhanced MR venography in the preoperative evaluation of parasagittal meningiomas

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    Bozzao, Alessandro; Finocchi, Vanina; Romano, Andrea; Ferrante, Michele; Fasoli, Fabrizio; Fantozzi, Luigi Maria [S. Andrea Hospital, Neuroradiological Section, Rome (Italy); Trillo, Giuseppe; Ferrante, Luigi [S. Andrea Hospital, Neurosurgical Section, Rome (Italy)

    2005-09-01

    Parasagittal meningiomas (PSM) may pose a difficult surgical challenge since venous patency and collateral anastomoses have to be clearly defined for correct surgical planning. The aim of this study was to assess the diagnostic value of contrast-enhanced (CE) magnetic resonance venography (MRV) in the preoperative evaluation of venous infiltration and collateral venous anastomoses in patients with PSM. CE-MRV was compared with phase-contrast (PC) magnetic resonance (MR) angiography, conventional angiography (when available), and surgery as a reference. Twenty-three patients undergoing surgery for meningiomas located adjacent to the superior sagittal sinus were prospectively evaluated. All the patients underwent both conventional MR examination and MRV. This was performed by means of PC and CE techniques. Both sets of angiograms (CE and PC) were evaluated by two expert neuroradiologists to assess (1) patency of the sinus (patent/occluded), (2) the extent of occlusion (in centimeters), and (3) the number of collateral anastomoses close to the insertion of the meningioma. Eight patients underwent digital subtraction angiography (DSA). All patients were operated on, and intraoperative findings were taken as the gold standard to evaluate the diagnostic value of MRA techniques. PC-MRV showed a flow void inside the sinus compatible with its occlusion in 15 cases, whereas CE-MRV showed the sinus to be occluded in five cases. CE-MRV data were confirmed by surgery, showing five patients to have an occlusion of the superior sagittal sinus. The PC-MRV sensitivity was thus 100% with a specificity of 50%. In those cases in which both MRV techniques documented occlusion of the sinus, the extent of occlusion was overestimated by PC compared with CE and surgery. CE-MRV depicted 87% of collateral venous anastomoses close to the meningioma as subsequently confirmed by surgery, while PC showed 58%. In the preoperative planning for patients with meningiomas located close to a venous

  14. Role of contrast-enhanced MR venography in the preoperative evaluation of parasagittal meningiomas

    International Nuclear Information System (INIS)

    Bozzao, Alessandro; Finocchi, Vanina; Romano, Andrea; Ferrante, Michele; Fasoli, Fabrizio; Fantozzi, Luigi Maria; Trillo, Giuseppe; Ferrante, Luigi

    2005-01-01

    Parasagittal meningiomas (PSM) may pose a difficult surgical challenge since venous patency and collateral anastomoses have to be clearly defined for correct surgical planning. The aim of this study was to assess the diagnostic value of contrast-enhanced (CE) magnetic resonance venography (MRV) in the preoperative evaluation of venous infiltration and collateral venous anastomoses in patients with PSM. CE-MRV was compared with phase-contrast (PC) magnetic resonance (MR) angiography, conventional angiography (when available), and surgery as a reference. Twenty-three patients undergoing surgery for meningiomas located adjacent to the superior sagittal sinus were prospectively evaluated. All the patients underwent both conventional MR examination and MRV. This was performed by means of PC and CE techniques. Both sets of angiograms (CE and PC) were evaluated by two expert neuroradiologists to assess (1) patency of the sinus (patent/occluded), (2) the extent of occlusion (in centimeters), and (3) the number of collateral anastomoses close to the insertion of the meningioma. Eight patients underwent digital subtraction angiography (DSA). All patients were operated on, and intraoperative findings were taken as the gold standard to evaluate the diagnostic value of MRA techniques. PC-MRV showed a flow void inside the sinus compatible with its occlusion in 15 cases, whereas CE-MRV showed the sinus to be occluded in five cases. CE-MRV data were confirmed by surgery, showing five patients to have an occlusion of the superior sagittal sinus. The PC-MRV sensitivity was thus 100% with a specificity of 50%. In those cases in which both MRV techniques documented occlusion of the sinus, the extent of occlusion was overestimated by PC compared with CE and surgery. CE-MRV depicted 87% of collateral venous anastomoses close to the meningioma as subsequently confirmed by surgery, while PC showed 58%. In the preoperative planning for patients with meningiomas located close to a venous

  15. Preoperative noninvasive EUS evaluation in patients with esophageal cancer considered for esophagectomy.

    Science.gov (United States)

    Gheorghe, Cristian; Stanescu, Codrut; Gheorghe, Liana; Bancila, Ion; Herlea, Vlad; Becheanu, Gabriel; Voinea, Daniela; Iacob, Razvan; Lupescu, Ioana; Anghel, Rodica; Croitoru, Adina; Popescu, Irinel

    2006-06-01

    Worldwide, esophageal cancer ranks fifth in the mortality rate regarding tumor locations. EUS is an essential tool in the evaluation of these patients allowing accurate staging and permitting stratified treatment options. AIM. We have studied prospectively the impact of EUS in the evaluation and decision for therapy of patients with esophageal cancer diagnosed in our center. From March 2001 through March 2006, 220 patients were hospitalized at the Center of Gastroenterology and Hepatology, Fundeni Clinical Institute, with the diagnosis of esophageal cancer. Out of the 220 patients, 41 patients, with no major comorbidities contraindicating esophagectomy already having been screened by abdominal and thoracic CT to disclose distant metastases, had EUS with the definite purpose of staging esophageal carcinoma and selecting adequate therapy. Assuming that without preoperative staging by EUS, all 41 patients in the study group would have been offered surgical treatment, we evaluated the number of patients and the modality in which EUS resulted in changes to the therapeutic plan. Depth of invasion was recorded for the 41 patients as follows: T1 in 2 patients (4.9%), T2 in 6 patients (14.6%), T3 in 24 patients (58.5%), and T4 in 10 patients (22%). Regional lymph node (N) status as determined by EUS criteria was as follows: N0 in 7 patients (17%) and N1 in 34 patients (83%). Assessment of distant metastases (M) was recorded showing 4 patients with celiac axis lymph nodes metastases (M1). Preoperative EUS staging changed the decision for surgery in 18 of 41 patients (44%) (p<0.0001) and allowed primary esophagectomy in only 6 patients (15%) (p<0.0001). Compared to histopathology, the overall accuracy of EUS staging for pT1 and pT2 was 80% for staging pT3 and pT4 77% and for lymph node evaluation was approximately 75%. Esophageal EUS offers useful information to clinicians caring for patients with esophageal cancer, impacts clinical decision making, and should be used in

  16. [Design and validation of an oral health questionnaire for preoperative anaesthetic evaluation].

    Science.gov (United States)

    Ruíz-López Del Prado, Gema; Blaya-Nováková, Vendula; Saz-Parkinson, Zuleika; Álvarez-Montero, Óscar Luis; Ayala, Alba; Muñoz-Moreno, Maria Fe; Forjaz, Maria João

    Dental injuries incurred during endotracheal intubation are more frequent in patients with previous oral pathology. The study objectives were to develop an oral health questionnaire for preanaesthesia evaluation, easy to apply for personnel without special dental training; and establish a cut-off value for detecting persons with poor oral health. Validation study of a self-administered questionnaire, designed according to a literature review and an expert group's recommendations. The questionnaire was applied to a sample of patients evaluated in a preanaesthesia consultation. Rasch analysis of the questionnaire psychometric properties included viability, acceptability, content validity and reliability of the scale. The sample included 115 individuals, 50.4% of men, with a median age of 58 years (range: 38-71). The final analysis of 11 items presented a Person Separation Index of 0.861 and good adjustment of data to the Rasch model. The scale was unidimensional and its items were not biased by sex, age or nationality. The oral health linear measure presented good construct validity. The cut-off value was set at 52 points. The questionnaire showed sufficient psychometric properties to be considered a reliable tool, valid for measuring the state of oral health in preoperative anaesthetic evaluations. Copyright © 2016 Sociedade Brasileira de Anestesiologia. Publicado por Elsevier Editora Ltda. All rights reserved.

  17. Design and validation of an oral health questionnaire for preoperative anaesthetic evaluation

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    Gema Ruíz-López del Prado

    Full Text Available Abstract Background and objectives: Dental injuries incurred during endotracheal intubation are more frequent in patients with previous oral pathology. The study objectives were to develop an oral health questionnaire for preanaesthesia evaluation, easy to apply for personnel without special dental training; and establish a cut-off value for detecting persons with poor oral health. Methods: Validation study of a self-administered questionnaire, designed according to a literature review and an expert group's recommendations. The questionnaire was applied to a sample of patients evaluated in a preanaesthesia consultation. Rasch analysis of the questionnaire psychometric properties included viability, acceptability, content validity and reliability of the scale. Results: The sample included 115 individuals, 50.4% of men, with a median age of 58 years (range: 38-71. The final analysis of 11 items presented a Person Separation Index of 0.861 and good adjustment of data to the Rasch model. The scale was unidimensional and its items were not biased by sex, age or nationality. The oral health linear measure presented good construct validity. The cut-off value was set at 52 points. Conclusions: The questionnaire showed sufficient psychometric properties to be considered a reliable tool, valid for measuring the state of oral health in preoperative anaesthetic evaluations.

  18. Design and validation of an oral health questionnaire for preoperative anaesthetic evaluation.

    Science.gov (United States)

    Ruíz-López Del Prado, Gema; Blaya-Nováková, Vendula; Saz-Parkinson, Zuleika; Álvarez-Montero, Óscar Luis; Ayala, Alba; Muñoz-Moreno, Maria Fe; Forjaz, Maria João

    Dental injuries incurred during endotracheal intubation are more frequent in patients with previous oral pathology. The study objectives were to develop an oral health questionnaire for preanaesthesia evaluation, easy to apply for personnel without special dental training; and establish a cut-off value for detecting persons with poor oral health. Validation study of a self-administered questionnaire, designed according to a literature review and an expert group's recommendations. The questionnaire was applied to a sample of patients evaluated in a preanaesthesia consultation. Rasch analysis of the questionnaire psychometric properties included viability, acceptability, content validity and reliability of the scale. The sample included 115 individuals, 50.4% of men, with a median age of 58 years (range: 38-71). The final analysis of 11 items presented a Person Separation Index of 0.861 and good adjustment of data to the Rasch model. The scale was unidimensional and its items were not biased by sex, age or nationality. The oral health linear measure presented good construct validity. The cut-off value was set at 52 points. The questionnaire showed sufficient psychometric properties to be considered a reliable tool, valid for measuring the state of oral health in preoperative anaesthetic evaluations. Copyright © 2016 Sociedade Brasileira de Anestesiologia. Published by Elsevier Editora Ltda. All rights reserved.

  19. Evaluation of Van Lake (Turkey) about radiological and hydrogeological risk

    International Nuclear Information System (INIS)

    Akyil, S.; Aytas, S.; Yusan, S.; Aslani, M. A. A.; Aycan, H. A.; Eral, M.; Tuerkoezue, D. A.; Isik, M. A.; Oelgen, M. K.

    2009-01-01

    Basins which are grow in the continent and not discharge to open sea are named as a close basin. Lead, uranium and thorium are high levels in respect to open basins. Lake of Van is a close basin. In the lake basins, rivers which are discharge basin are the most important source of the heavy metal concentration. In this study, surface water, coast and deep sediments of Van Lake and Inci Kefal (fish) were analyzed as a radiological and evaluated in terms of hydrogeological. Data was obtained for natural radioactivity concentration of this lake and evaluated using geostatistical methods in a geographical information system environment and fitted for isoradioactivity contour maps. The concentration and distribution of natural radionuclides in Van Lake were investigated with the aim of evaluating the environmental radioactivity. Sixty three coastal and deep sediments, 228 lake surface waters and 12 fish samples were taken in Van Lake over the time period 2005-2008 and the distribution pattern of the measured radionuclides was presented. The mean concentrations of gross alpha and beta, eU, eTh and K-40 activities in sediments were 207±96, 1046±60, 207±96, 70±29 and 399±231 Bq/kg, respectively. On the other hand, water samples from Van Lake had mean concentrations of 0.74±0.46 Bq/L for gross alpha activity concentration, 0.02±0.01 Bq/L for gross beta activity concentration, 0.06±0.04 Bq/L for gross radium isotopes, respectively. The mean gross alpha and beta, eU, eTh and K-40 activities in fish samples were 47±18, 470±12, 0.57±0.22, 0.022±0.006, 319±11 Bq/kg, respectively. An average annual effective dose equivalent (mSv/y) was calculated.

  20. Preoperative evaluation of renal anatomy and renal masses with helical CT, 3D-CT and 3D-CT angiography.

    Science.gov (United States)

    Toprak, Uğur; Erdoğan, Aysun; Gülbay, Mutlu; Karademir, Mehmet Alp; Paşaoğlu, Eşref; Akar, Okkeş Emrah

    2005-03-01

    The aim of this prospective study was to determine the efficacy of three-dimensional computed tomography (3D-CT) and three-dimensional computed tomographic angiography (3D-CTA) that were reconstructed by using the axial images of the multiphasic helical CT in the preoperative evaluation of renal masses and demonstration of renal anatomy. Twenty patients that were suspected of having renal masses upon initial physical examination and ultrasonographic evaluation were examined through multiphasic helical CT. Two authors executed CT evaluations. Axial images were first examined and then used to reconstruct 3D-CT and 3D- CTA images. Number, location and size of the renal masses and other findings were noted. Renal vascularization and relationships of the renal masses with the neighboring renal structures were further investigated with 3D-CT and 3D-CTA images. Out of 20 patients, 13 had histopathologically proven renal cell carcinoma. The diagnoses of the remaining seven patients were xanthogranulomatous pyelonephritis, abscess, simple cyst, infected cyst, angiomyolipoma, oncocytoma and arteriovenous fistula. In the renal cell carcinoma group, 3 patients had stage I, 7 patients had stage II, and 3 patients had stage III disease. Sizes of renal cell carcinoma masses were between 23 mm to 60 mm (mean, 36 mm). Vascular invasion was shown in 2 renal cell carcinoma patients. Collecting system invasion was identified in 11 of 13 renal cell patients. These radiologic findings were confirmed with surgical specimens. Three-dimensional CT and 3D-CTA are non-invasive, effective imaging techniques for the preoperative evaluation of renal masses.

  1. Radiological data acquisition, investigation and evaluation of mining relics

    International Nuclear Information System (INIS)

    1992-01-01

    Within the scope of a Federal Project, the environmental radioactivity and the radon concentration in buildings caused by mining relics in the new Federal Lands of Germany are investigated. In the first phase of the project, about 8000 relics of former mining were identified by analysing existing documents, categorised, and recorded in a special data bank. Thereby, 'areas of suspicion' of 1500 km 2 spaciously defined in the beginning could be reduced to 'areas of investigation' of 250 km 2 now to be examined in close coordination with the land and district authorities by a programme gradually adapted to the radiological significance of the relics. Experience with site-specific measuring programmes have already been gained through three pilot projects at typical sites of former mining activities. Recommendations of the German Radiation Protection Commission serve for the evaluation of the results. By the measuring programme for radon in buildings of mining and geological predestined regions more than 25000 buildings of 210 communities have been investigated. The results confirm the expected prevailing influence of the geologic underground on the radon concentration. Extreme values are observed where direct connections additionally exist to mining relics in the ground. (orig./HP) With 11 figs. in annex [de

  2. Radioisotopic and Radiological Evaluation in Patient with Stress Fracture

    International Nuclear Information System (INIS)

    Ko, Kwang Seop; Kim, Jai Young; Kang, Sung Koo; Kim, So Yon; Lee, Gwon Jun

    1987-01-01

    The stress fracture is a disease caused by and abnormal stress to the normal bone with constant, repeated pull. Early detection of stress fracture plays an important role in treatment and prevention of its complication. Bone scintigraphy was performed to evaluate 18 patients with stress fracture of the lower extremities from May, 1985 to April, 1987, in the Department of Internal Medicine of National Police Hospital. The results were as follows: 1) Seventeen of the 18 cases showed positive bone scans at the initial study performed from 1 week to 5 months after the onset of symptom. 2) Ten of the 18 patients had findings of stress fracture at the initial X-ray film. Two out of 8 negative case revealed positive findings in the follow-up studies. 3) The bone scans in the 2 cases taken 5 months after the onset of symptom; the one showed only slightly increased radio uptake, the other showed no abnormal findings. In conclusion, bone scanning is a more sensitive indicator of early stress fracture than radiologic study, The healing phase is characterized by a gradual decline in radioactivity at the fracture site in concordance with subsidence of symptom.

  3. Radiological evaluation of the chronic venous stasis syndrome

    International Nuclear Information System (INIS)

    Train, J.S.; Schanzer, H.; Peirce, E.C. II; Dan, S.J.; Mitty, H.A.

    1987-01-01

    Chronic venous stasis is an extremely complex clinical syndrome of pain and changes in the skin that can involve the superficial, deep, and perforating veins. This syndrome is commonly referred to as the postphlebitic syndrome, implying that thrombophlebitis is its sole etiology. To test this hypothesis, the authors performed ascending venography on 51 limbs of patients with the chromic venous stasis syndrome and demonstrated that 32 had no radiological evidence of recent or old thrombophlebitis. Instead, they had normal-appearing veins, suggesting primary incompetence of the deep and/or perforating venous valves rather than thrombophlebitis as the etiology. Since various operations have recently been proposed to correct or bypass malfunctioning valves, precise demonstration of pathological change is required to choose the appropriate procedure and to evaluate results. Descending venograms were combined with the ascending studies in 42 limbs for this purpose. In addition to outlining the abnormalities responsible for chronic venous stasis syndrome in individual cases, interesting conclusions regarding the syndrome itself were reached

  4. Informatics in radiology: evaluation of an e-learning platform for teaching medical students competency in ordering radiologic examinations.

    Science.gov (United States)

    Marshall, Nina L; Spooner, Muirne; Galvin, P Leo; Ti, Joanna P; McElvaney, N Gerald; Lee, Michael J

    2011-01-01

    A preliminary audit of orders for computed tomography was performed to evaluate the typical performance of interns ordering radiologic examinations. According to the audit, the interns showed only minimal improvement after 8 months of work experience. The online radiology ordering module (ROM) program included baseline assessment of student performance (part I), online learning with the ROM (part II), and follow-up assessment of performance with simulated ordering with the ROM (part III). A curriculum blueprint determined the content of the ROM program, with an emphasis on practical issues, including provision of logistic information, clinical details, and safety-related information. Appropriate standards were developed by a committee of experts, and detailed scoring systems were devised for assessment. The ROM program was successful in addressing practical issues in a simulated setting. In the part I assessment, the mean score for noting contraindications for contrast media was 24%; this score increased to 59% in the part III assessment (P = .004). Similarly, notification of methicillin-resistant Staphylococcus aureus status and pregnancy status and provision of referring physician contact information improved significantly. The quality of the clinical notes was stable, with good initial scores. Part III testing showed overall improvement, with the mean score increasing from 61% to 76% (P radiology services, and the experience typically afforded to interns does not address this lack of knowledge. The ROM program was a successful intervention that resulted in statistically significant improvements in the quality of radiologic examination orders, particularly with regard to logistic and radiation safety issues.

  5. Radiological evaluation of chronic hemophilic arthropathy by the Pettersson score: Problems in correlation in adult patients

    Energy Technology Data Exchange (ETDEWEB)

    Hamel, J.; Pohlmann, H.; Schramm, W.

    1988-01-01

    This study deals with the distribution and extent of hemophilic arthropathy (HA) in 52 adult patients suffering from severe hemophilia A. A clinical and radiological evaluation was undertaken and the results were compared. The limitations of the currently used radiological scoring system are discussed. (orig.)

  6. EEG, MRI, and SPECT in epilepsy. Relative contributions to preoperative evaluation

    International Nuclear Information System (INIS)

    Seki, Gaku; Hoshida, Tohru; Goda, Kazuo; Hashimoto, Hiroshi; Nakase, Hiroyuki; Hirabayashi, Hidehiro; Kawaguchi, Shoichiro; Morimoto, Tetsuya; Sakaki, Toshisuke

    1998-01-01

    We comparatively assessed detection of epileptogenic areas on preoperative evaluation in 33 patients with intractable partial epilepsy using scalp interictal and ictal electroencephalography (EEG), magnetic resonance imaging (MRI), and interictal single photon emission computed tomography (SPECT). There are 22 temporal and 11 extratemporal lobe epilepsies. All or almost of their seizures have stopped after resective surgery for more than 12 months follow-up period, averaged 43 months. MRI studies demonstrated 21 organic lesions, 11 mesial temporal sclerosis and one patient showed normal brain tissue. Scalp EEG could correctly identify the focus in 14 of 33 cases (42%), interictal SPECT in 18 of 26 (69%), MRI in 29 of 33 (88%), interictal scalp EEG-video monitoring in 17 of 24 (71%), and ictal scalp EEG-video monitoring in 15 of 22 (68%). Although neuroimaging studies, especially MRI, are useful to detect not only localization of epileptic lesions but also epileptogenic focus, for example, mesial temporal sclerosis, the exact localization of epileptogenic areas could be done by comprehensive evaluation including ictal scalp EEG-video monitoring. (author)

  7. Evaluation of the response to preoperative chemotherapy with PET image in osteosarcoma

    Energy Technology Data Exchange (ETDEWEB)

    Jeon, Dae Geun; Lee, Jong Seok; Kim, Sug Jun; Lee, Soo Yong

    1999-12-01

    F18 FDG PET scan has an advantage in evaluating the biologic status of the tumors. The purpose of this study is evaluate the role of PET scan in pre- and post chemotherapeutic osteosarcomas and correlate the findings with pathologic examination. Nine cases of osteosarcoma had biopsy and preoperative chemotherapy at our department. There were 4 distal femur, 4 proximal tibia and 1 distal ulna. All case had initial MRI and PET scan and these were repeated after 2 cycles of chemotherapy. Under PET image parameters such as VOI (volume of interest), total activity, degree of necrosis and T/N (tumor/normal tissue) ratio were analyzed. There was a significant correlation between the calculated necrosis in PET and observed one on pathologic specimen (r2=0.78, p<0.05). Cross correlation among identified variables revealed meaningful result between T/N ration and tumor necrosis (r2=0.45, p<0.05). As the T/N ratio decrease, so much more the tumor necrosis was. F18 FDG PET scan could get objective data such as volume, degree of necrosis and total activity and was also useful in estimating the contribution of chemotherapy in tumor necrosis over the innate necrosis before treatment.

  8. Evaluation of the response to preoperative chemotherapy with PET image in osteosarcoma

    International Nuclear Information System (INIS)

    Jeon, Dae Geun; Lee, Jong Seok; Kim, Sug Jun; Lee, Soo Yong

    1999-12-01

    F18 FDG PET scan has an advantage in evaluating the biologic status of the tumors. The purpose of this study is evaluate the role of PET scan in pre- and post chemotherapeutic osteosarcomas and correlate the findings with pathologic examination. Nine cases of osteosarcoma had biopsy and preoperative chemotherapy at our department. There were 4 distal femur, 4 proximal tibia and 1 distal ulna. All case had initial MRI and PET scan and these were repeated after 2 cycles of chemotherapy. Under PET image parameters such as VOI (volume of interest), total activity, degree of necrosis and T/N (tumor/normal tissue) ratio were analyzed. There was a significant correlation between the calculated necrosis in PET and observed one on pathologic specimen (r2=0.78, p<0.05). Cross correlation among identified variables revealed meaningful result between T/N ration and tumor necrosis (r2=0.45, p<0.05). As the T/N ratio decrease, so much more the tumor necrosis was. F18 FDG PET scan could get objective data such as volume, degree of necrosis and total activity and was also useful in estimating the contribution of chemotherapy in tumor necrosis over the innate necrosis before treatment

  9. EEG, MRI, and SPECT in epilepsy. Relative contributions to preoperative evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Seki, Gaku [Luoyang Medical Coll. Associated Hospital (China); Hoshida, Tohru; Goda, Kazuo; Hashimoto, Hiroshi; Nakase, Hiroyuki; Hirabayashi, Hidehiro; Kawaguchi, Shoichiro; Morimoto, Tetsuya; Sakaki, Toshisuke

    1998-07-01

    We comparatively assessed detection of epileptogenic areas on preoperative evaluation in 33 patients with intractable partial epilepsy using scalp interictal and ictal electroencephalography (EEG), magnetic resonance imaging (MRI), and interictal single photon emission computed tomography (SPECT). There are 22 temporal and 11 extratemporal lobe epilepsies. All or almost of their seizures have stopped after resective surgery for more than 12 months follow-up period, averaged 43 months. MRI studies demonstrated 21 organic lesions, 11 mesial temporal sclerosis and one patient showed normal brain tissue. Scalp EEG could correctly identify the focus in 14 of 33 cases (42%), interictal SPECT in 18 of 26 (69%), MRI in 29 of 33 (88%), interictal scalp EEG-video monitoring in 17 of 24 (71%), and ictal scalp EEG-video monitoring in 15 of 22 (68%). Although neuroimaging studies, especially MRI, are useful to detect not only localization of epileptic lesions but also epileptogenic focus, for example, mesial temporal sclerosis, the exact localization of epileptogenic areas could be done by comprehensive evaluation including ictal scalp EEG-video monitoring. (author)

  10. Evaluation of the biofragmentable anastomotic ring following preoperative irradiation to the rectosigmoid in dogs

    Energy Technology Data Exchange (ETDEWEB)

    Smith, A.D.; Bubrick, M.P.; Mestitz, S.T.; Crouch, F.M.; Johnston, G.R.; Feeney, D.A.; Strom, R.L.; Maney, J.W.

    1988-01-01

    An animal study was done to evaluate the safety of a sutureless colorectal anastomosis in irradiated bowel. Forty mongrel dogs received preoperative radiation with 5000 rads and then underwent a low anterior resection and anastomosis using either the EEA-31TM stapling device, a two-layer handsewn technique, or the biofragmentable anastomotic ring (BAR) 31-1.5 mm and BAR 31-2.0 mm devices. The anastomoses were then evaluated for early and late anastomotic healing and leaks. The results show four radiographic (three clinical) leaks (P less than .05) in the BAR 31-1.5 mm group and one radiographic leak in the handsewn group. No leaks were detected in the EEA or BAR 31-2.0 mm groups. Results indicate that all three techniques can be done safely with this dose of radiation, and gap size (1.5 mm vs. 2.0 mm) is of critical importance when performing a BAR anastomosis in irradiated bowel.

  11. Evaluation of the biofragmentable anastomotic ring following preoperative irradiation to the rectosigmoid in dogs

    International Nuclear Information System (INIS)

    Smith, A.D.; Bubrick, M.P.; Mestitz, S.T.; Crouch, F.M.; Johnston, G.R.; Feeney, D.A.; Strom, R.L.; Maney, J.W.

    1988-01-01

    An animal study was done to evaluate the safety of a sutureless colorectal anastomosis in irradiated bowel. Forty mongrel dogs received preoperative radiation with 5000 rads and then underwent a low anterior resection and anastomosis using either the EEA-31TM stapling device, a two-layer handsewn technique, or the biofragmentable anastomotic ring (BAR) 31-1.5 mm and BAR 31-2.0 mm devices. The anastomoses were then evaluated for early and late anastomotic healing and leaks. The results show four radiographic (three clinical) leaks (P less than .05) in the BAR 31-1.5 mm group and one radiographic leak in the handsewn group. No leaks were detected in the EEA or BAR 31-2.0 mm groups. Results indicate that all three techniques can be done safely with this dose of radiation, and gap size (1.5 mm vs. 2.0 mm) is of critical importance when performing a BAR anastomosis in irradiated bowel

  12. Preoperative evaluation of cardiac risk using dobutamine-thallium imaging in vascular surgery

    International Nuclear Information System (INIS)

    Zellner, J.L.; Elliott, B.M.; Robison, J.G.; Hendrix, G.H.; Spicer, K.M.

    1990-01-01

    Coronary artery disease is frequently present in patients undergoing evaluation for reconstructive peripheral vascular surgery. Dobutamine-thallium imaging has been shown to be a reliable and sensitive noninvasive method for the detection of significant coronary artery disease. Eighty-seven candidates for vascular reconstruction underwent dobutamine-thallium imaging. Forty-eight patients had an abnormal dobutamine-thallium scan. Twenty-two patients had infarct only, while 26 had reversible ischemia demonstrated on dobutamine-thallium imaging. Fourteen of 26 patients with reversible ischemia underwent cardiac catheterization and 11 showed significant coronary artery disease. Seven patients underwent preoperative coronary bypass grafting or angioplasty. There were no postoperative myocardial events in this group. Three patients were denied surgery on the basis of unreconstructible coronary artery disease, and one patient refused further intervention. Ten patients with reversible myocardial ischemia on dobutamine-thallium imaging underwent vascular surgical reconstruction without coronary revascularization and suffered a 40% incidence of postoperative myocardial ischemic events. Five patients were denied surgery because of presumed significant coronary artery disease on the basis of the dobutamine-thallium imaging and clinical evaluation alone. Thirty-nine patients with normal dobutamine-thallium scans underwent vascular reconstructive surgery with a 5% incidence of postoperative myocardial ischemia. Dobutamine-thallium imaging is a sensitive and reliable screening method which identifies those patients with coronary artery disease who are at high risk for perioperative myocardial ischemia following peripheral vascular surgery

  13. Evaluation of radiological doses to the terrestrial plants around Trombay

    International Nuclear Information System (INIS)

    Ajay Kumar; Singhal, R.K.; Preetha, J.; Joshi, S.N.; Hegde, A.G.

    2005-01-01

    Existing policies for radiation protection do not provide explicit criteria for the protection of species other than humans, i.e. not for flora and fauna. Concern over this omission is now being widely expressed and moves are under way to evaluate the doses to terrestrial and aquatic biota. During the present work radiological doses (external and internal) to the terrestrial plants were evaluated by estimating the concentration of anthropogenic ( 137 Cs, 90 Sr) and natural radionuclides ( 238 U, 232 Th and 40 K) in the plant leaves and by measuring the external gamma radiation due to different radionuclide. The soil and vegetation sample were collected from fifteen sampling locations around the different locations at Trombay. The samples were processed as per IAEA (International Atomic Energy Agency) protocol for the estimation of naturally occurring and anthropogenic radionuclides in soil and terrestrial plants. The gamma emitting radionuclides were measured by high resolution gamma (HPGe) spectrometry system. Maximum exposure (external + internal) to the terrestrial plants was observed due to 232 Th while 238 U showed minimum exposure. The average value of radiation exposure to the terrestrial plants for 40 K, 137 Cs, 90 Sr, 238 U and 232 Th was 1555.2 ± 92.4, 691.2 ± 54.3, 2564.1 ± 534.9, 82.5 ±5.2, and 4419.6 ± 1165.5 μGy/y respectively. The radiation exposure (external + internal ) to the terrestrial plants due to all radionuclides was found within the permissible limits (i.e. 10 mGy/d) as per recommended by the United States, Department of Energy (DOE). (author)

  14. Current evaluation of the information about Radiological Protection in Internet

    International Nuclear Information System (INIS)

    Ruiz-Cruces, R.; Marco, M.; Villanueva, I.

    2003-01-01

    To analyze the current situation about the pedagogic information on radiological protection training which could be found in Internet. More than 756 web-pages have been visited in Internet about Radiological Protection in the nuclear and medical fields, providing information mainly focusing on information to the members of the public. In this search were used internet Searching Appliance (as Copernicus, Google and Scirus), using key words related with this subject (as Radiological Protection and Health Safety), getting the internet address of organizations, societies and investigation groups. Only a low percentage (less than 5 per cent) of these addresses content information on Radiological Protection for the members of the public, including information about the regulator Organizations, and which are the objectives for protection of the members of the public against ionization radiation (from the point of view of the use of the ionization radiation in the medical and nuclear field). This work attempts to propose the use of internet as a tool for informing the members of the public in matter of radiological protection, as first link in the chain of the training and education. (Author)

  15. Risk of malignancy index in the preoperative evaluation of patients with ovarian masses

    International Nuclear Information System (INIS)

    Jabeen, R.; Khan, S.A.; Naveed, S.

    2015-01-01

    Objective: To evaluate the ability of RMI in preoperative discrimination of benign from malignant ovarian mass among women presenting at Nishtar Hospital Multan Pakistan. Methodology: It was a prospective study conducted at department of obstetrics/gynae Nishtar Hospital Multan between September 2008 to August 2009. 60 patients of more than 30 years of age admitted in gynaecology department for surgical exploration of ovarian mass were included. All the women in whom ovarian malignancy had already been diagnosed and admitted for second laparotomy were excluded. Results: The median age at presentation of ovarian malignancy is 56 years. The sensitivity of RMI in our group was 82.3%,the specificity was 88.3%, positive predictive value was 73.7% and the negative predictive value was 92.6%. Receiver operating curves reveal that RMI was a better diagnostic marker than CA-125 or ultrasound score alone for the prediction of malignancy in ovarian masses. Conclusion: The risk of malignancy index has high specificity and sensitivity. It yielded a better diagnostic performance as compared to CA-125 or ultrasound score alone in differentiating benign from malignant ovarian lesions. (author)

  16. MRI technique for the preoperative evaluation of deep infiltrating endometriosis: current status and protocol recommendation

    International Nuclear Information System (INIS)

    Schneider, C.; Oehmke, F.; Tinneberg, H.-R.; Krombach, G.A.

    2016-01-01

    Endometriosis is a common cause of chronic pelvic pain and infertility. It is defined as the occurrence of endometrial tissue outside the uterine cavity and can manifest as a peritoneal, ovarian or infiltrating form, the latter being referred to as deep infiltrating endometriosis (DIE). Surgery is essential in the treatment of DIE and depending on the severity of the disease, surgery can be difficult and extensive. Beside clinical examination and ultrasound, magnetic resonance imaging (MRI) has proven its value to provide useful information for planning surgery in patients with suspected DIE. To optimise the quality of MRI examinations, radiologists have to be familiar with the capabilities and also the limitations of this technique with respect to the assessment of DIE. MRI yields morphological information by using mainly T1- and T2-weighted sequences, but can also provide functional information by means of intravenous gadolinium, diffusion-weighted imaging or cine-MRI. In this article, these techniques and also adequate measures of patient preparation, which are indispensable for successful MRI imaging for the preoperative evaluation of DIE, are reviewed and a comprehensive protocol recommendation is provided.

  17. Prospective evaluation of stress myocardial perfusion imaging for pre-operative cardiac risk assessment

    International Nuclear Information System (INIS)

    Byrne, A.J.; Rowe, C.C.; Flannery, G.

    2002-01-01

    Full text: A prospective evaluation of patients who underwent stress myocardial perfusion imaging (MPI) to assess preoperative cardiac risk was undertaken. At the time of the scan patients were classified into 4 Clinical Risk groups (CR) based on known clinical data. On completion of the scan, the patient was then categorised into 4 Scan based Risk groups (SR), incorporating size of perfusion deficit, single versus multi-vessel disease and ejection fraction. Surgery at Austin and Repatriation Medical Centre within 6 months of scan and complications were identified using the hospital medical database. Major early cardiac events coded were death (cardiac related), myocardial infarction, unstable angina, acute pulmonary oedema, cardiac arrest, and urgent revascularisation. 208 patients have reached 6 months post-MPI scan. Of these 119 (57%) were identified as having surgery. Of the Scan Risk groups, 63% of normal, 57% of increased, and 47% of high and very high groups have had surgery. An abnormal scan is associated with a three-fold risk of cardiac complication (3.5% vs 11.3%). This is lower than most previous reports and may be due to higher representation of low risk surgical procedures (14% in this series), improved peri-operative care and/or the test result influence on management (suggested by decreasing surgical rate as SR estimate rose). Copyright (2002) The Australian and New Zealand Society of Nuclear Medicine Inc

  18. Clinical and Radiological Evaluation of Children with Subacute Sclerosan Panencephalitis

    Directory of Open Access Journals (Sweden)

    Ahmet İrdem

    2004-01-01

    Full Text Available A total of 65 children with Subacute Sclerosing Panencephalitis (SSPE who admittedto our clinic between September 1998 and December 2002 were retrospectively evaluated interms of clinical and radiological findings.The most common symptoms and findings at admission were myoklonia (31 patients, 47%, behaveral changes (18 patients, 27.7 % and convulsion (8 patients, 12 %. There was atrauma history initiating symptoms in 14 patients (21.5 %. Neurological symptoms presentedsignificantly earlier in patients who had measles before 2 years of age compared to others(p0.05. The clinical stage of the patients at admission was determined based on Risk veHaddad classification. The most frequent stage was IIA (21 patients, 32.2%, IIC (17patients, 26.2% and IIB (16 patients, 24.6%. At the follow-up period, 46 (71% patients wasdepended to bed. The mean time interval between SSPE initiation age and bed dependencywas 4.68 ± 4.05 months (1-17 months.Of the 31 patients who underwent cranial magnetic rezonans imaging (MRI, 15patients (48.38% had pathological findings, the most frequent findings were cortical vesubcortical lesions. Of the 24 patients who underwent cranial tomographi, 22 (91.6% werenormal. Of the remaining two, one had atrophy and the other had increase in contrast. All ofthe patients underwent rutine EEG test. Fifty-four (83.1% of these had periodic complexhigh slow wave activity.The clinical findings and Electro Encephalographi results are important parameters inthe diagnosis of SSPE. Cranial tomographi is not useful in the diagnosis of SSPE. However,cranial MRI findings is pathologic only in the half of the patients.

  19. Preoperative Serum Thyrotropin to Thyroglobulin Ratio Is Effective for Thyroid Nodule Evaluation in Euthyroid Patients.

    Science.gov (United States)

    Wang, Lina; Li, Hao; Yang, Zhongyuan; Guo, Zhuming; Zhang, Quan

    2015-07-01

    This study was designed to assess the efficiency of the serum thyrotropin to thyroglobulin ratio for thyroid nodule evaluation in euthyroid patients. Cross-sectional study. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China. Retrospective analysis was performed for 400 previously untreated cases presenting with thyroid nodules. Thyroid function was tested with commercially available radioimmunoassays. The receiver operating characteristic curves were constructed to determine cutoff values. The efficacy of the thyrotropin:thyroglobulin ratio and thyroid-stimulating hormone for thyroid nodule evaluation was evaluated in terms of sensitivity, specificity, positive predictive value, positive likelihood ratio, negative likelihood ratio, and odds ratio. In receiver operating characteristic curve analysis, the area under the curve was 0.746 for the thyrotropin:thyroglobulin ratio and 0.659 for thyroid-stimulating hormone. With a cutoff point value of 24.97 IU/g for the thyrotropin:thyroglobulin ratio, the sensitivity, specificity, positive predictive value, positive likelihood ratio, and negative likelihood ratio were 78.9%, 60.8%, 75.5%, 2.01, and 0.35, respectively. The odds ratio for the thyrotropin:thyroglobulin ratio indicating malignancy was 5.80. With a cutoff point value of 1.525 µIU/mL for thyroid-stimulating hormone, the sensitivity, specificity, positive predictive value, positive likelihood ratio, and negative likelihood ratio were 74.0%, 53.2%, 70.8%, 1.58, and 0.49, respectively. The odds ratio indicating malignancy for thyroid-stimulating hormone was 3.23. Increasing preoperative serum thyrotropin:thyroglobulin ratio is a risk factor for thyroid carcinoma, and the correlation of the thyrotropin:thyroglobulin ratio to malignancy is higher than that for serum thyroid-stimulating hormone. © American Academy of Otolaryngology—Head and Neck Surgery Foundation 2015.

  20. Quantitative Evaluation of Iranian Radiology Papers and Its Comparison with Selected Countries

    International Nuclear Information System (INIS)

    Ghafoori, Mahyar; Emami, Hasan; Sedaghat, Abdolrasoul; Ghiasi, Mohammad; Shakiba, Madjid; Alavi, Manijeh

    2014-01-01

    Recent technological developments in medicine, including modern radiology have promoted the impact of scientific researches on social life. The scientific outputs such as article and patents are products that show the scientists’ attempt to access these achievements. In the current study, we evaluate the current situation of Iranian scientists in the field of radiology and compare it with the selected countries in terms of scientific papers. For this purpose, we used scientometric tools to quantitatively assess the scientific papers in the field of radiology. Radiology papers were evaluated in the context of medical field audit using retrospective model. We used the related databases of biomedical sciences for extraction of articles related to radiology. In the next step, the situation of radiology scientific products of the country were determined with respect to the under study regional countries. Results of the current study showed a ratio of 0.19% for Iranian papers in PubMed database published in 2009. In addition, in 2009, Iranian papers constituted 0.29% of the Scopus scientific database. The proportion of Iranian papers in the understudy region was 7.6%. To diminish the gap between Iranian scientific radiology papers and other competitor countries in the region and achievement of document 2025 goals, multifold effort of the society of radiology is necessary

  1. Radiologic evaluation of facial injury; Avaliacao radiologica dos traumatismos faciais

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Ricardo Pires de; Volpato, Richard [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil). Servico de Diagnostico por Imagem]. E-mail: richard_volpato@uol.com.br; Nascimento, Lia Paula [Complexo Hospitalar Heliopolis, Sao Paulo, SP (Brazil)

    2003-03-01

    A detailed radiological investigation of the maxillofacial injuries is essential to achieve good treatment results. The images should identify every lesion and guide the treatment, thus improving esthetic and functional results. With the aim of simplifying the diagnostic task, the face may be seen as a five regions structure that may suffer a regional fracture or combined fractures involving the adjacent regions. These regions represent areas of focus for pre surgical planning and are as follows: nasal, orbital, zygomatic, maxillary, and mandibular. In order to understand the injury mechanisms and their consequences it is useful to know the supporting buttresses, which are divided in five sagittal planes, three horizontal planes and two coronal planes. We reviewed the cases of patients with facial trauma treated at Complexo Hospitalar Heliopolis, Sao Paulo, Brazil. A review of the relevant issues concerning radiological investigation of these injuries is presented. This study allowed standardization and ordering of the radiological investigation in patients with facial trauma. (author)

  2. Multidetector computed tomography for preoperative evaluation of vascular anatomy in living renal donors.

    Science.gov (United States)

    Türkvatan, Aysel; Akinci, Serkan; Yildiz, Sener; Olçer, Tülay; Cumhur, Turhan

    2009-04-01

    Currently, multidetector computed tomographic (MDCT) angiography has become a noninvasive alternative imaging modality to catheter renal angiography for the evaluation of renal vascular anatomy in living renal donors. In this study, we investigated the diagnostic accuracy of 16-slice MDCT in the preoperative assessment of living renal donors. Fifty-nine consecutive living renal donors (32 men, 27 women) underwent MDCT angiography followed by open donor nephrectomy. All MDCT studies were performed by using a 16-slice MDCT scanner with the same protocol consisting of arterial and nephrographic phases followed by conventional abdominal radiography. The MDCT images were assessed retrospectively for the number and branching pattern of the renal arteries and for the number and presence of major or minor variants of the renal veins. The results were compared with open surgical results. The sensitivity and specificity of MDCT for the detection of anatomic variants of renal arteries including the accessory arteries (n = 9), early arterial branching (n = 7) and major renal venous anomalies including the accessory renal veins (n = 3), late venous confluence (n = 4), circumaortic (n = 2) or retroaortic (n = 3) left renal veins were 100%. However, the sensitivity for identification of minor venous variants was 79%. All of three ureteral duplications were correctly identified at excretory phase conventional abdominal radiography. Sixteen-slice MDCT is highly accurate for the identification of anatomic variants of renal arteries and veins. Dual-phase MDCT angiography including arterial and nephrographic phases followed by conventional abdominal radiography enables complete assessment of renal donors without significant increase of radiation dose. However, the evaluation of minor venous variants may be problematic because of their small diameters and poor opacification.

  3. Radiologic evaluation of coronary artery fistula in adult

    International Nuclear Information System (INIS)

    Je, Eun Kyoung; Kim, Yang Min; Choi, Ik Joon; Kim, Seong Bae; Lee, Jae Young; Han, Sang Wook; Cho, Sung Hwui; Park, Jae Hyung; Choi, Yonug Hi

    1997-01-01

    To evaluate the clinical and radiologic findings of coronary artery fistula (CAF) by reviwing adult patients in whom this condition had been diagnosed by coronary angiogram. We retrospectively analysed the clinical findings, chest X-rays and angiographic findings of 37 adult CAF patients treated at three institutes over a period of is 15 years. On coronary angiogram, the origin of CAF was found to be the left coronary artery (LCA) in 20 cases(54%), the right coronary artery (RCA) in five (14%), and both in 12(32%). By subdividing the coronary artery into four segments [RCA, left main coronary artery, left anterior descending artery(LAD), and left circumflex artery(LCX)], the origin of CAF (total 55 cases) was found to be the LAD in 23 cases(42%), the LCX in 12(22%), the left main coronary artery in three (5%), and the RCA in 17(31%). The draining site of CAF was the right heart [right atrium, right ventricle, and main pulmonary artery(MPA)] in 28 cases(75%) the left heart(left atrium and left ventricle) in 8(22%), and both in one (3%). The fistula drained to the cardiac chamber in 12 cases (33%), the MPA in 23(62%), and both in 2(5%). Among 55 cases, the total number of fistulas to the MPA was 35, and their origin was the RCA in nine instances (26%), and the left coronary artery in 26(74%). CAF to the MPA was classified into four types:Type I(single, tortuous and not dilated) was seen in six patients (17%), type II(single, tortuous and dilated) in three (9%), type III(multiple and fine plexus) in 21(60%), and type IV(multiple and dilated plexus)in five (14%). Eighteen cases (49%) were associated with the other cardiac disease. In these Korean adults, CAF originated most commonly from the LCA, especially from the LAD segment of this artery, and most frequently drained to the right cardic chamber, especially to the MPA. The morphology of the CAF to the MPA was mostly multiple and fine plexus. We suggest that to ensure the most suitable treatment, and for better

  4. Evaluation of long term radiological impact on population close to remediated uranium mill tailings storages

    International Nuclear Information System (INIS)

    Kerouanton, David; Delgove, Laure

    2008-01-01

    A methodology is elaborated in order to evaluate the long term radiological impact of remediated uranium mill tailings storage. Different scenarios are chosen and modelled to cover future evolution of the tailings storages. Radiological impact is evaluated for different population such as adults and children living in the immediate vicinity or directly on the storage, road workers or walkers on the storage. Equation and methods are detailed. (author)

  5. Computational evaluation of a pencil ionization chamber in a standard diagnostic radiology beam

    International Nuclear Information System (INIS)

    Mendonca, Dalila Souza Costa; Neves, Lucio Pereira; Perini, Ana Paula; Belinato, Walmir

    2016-01-01

    In this work a pencil ionization chamber was evaluated. This evaluation consisted in the determination of the influence of the ionization chamber components in its response. For this purpose, the Monte Carlo simulations and the spectrum of the standard diagnostic radiology beam (RQR5) were utilized. The results obtained, showed that the influence of the ionization chamber components presented no significant influence on the chamber response. Therefore, this ionization chamber is a good alternative for dosimetry in diagnostic radiology. (author)

  6. Common Pediatric Urological Disorders: Clinical and radiological evaluation

    OpenAIRE

    Robson, Wm. Lane M.; Leung, Alexander K.C.; Boag, Graham S.

    1991-01-01

    The clinical and radiological presentations of 12 pediatric urological disorders are described. The described disorders include pyelonephritis, vesicoureteral reflux, ureteropelvic obstruction, ureterovesical obstruction, ectopic ureterocele, posterior urethral valves, multicystic dysplastic kidney, polycystic kidney disease, ectopic kidney, staghorn calculi, urethral diverticulum, and urethral meatal stenosis.

  7. Radiological Evaluation of phosphate fertilizers used in Tunisia

    International Nuclear Information System (INIS)

    Jemli, Khaoula

    2010-01-01

    The need of control of natural radioactivity in the environment and the radiological impact of the use of chemical fertilizers has led us in this work to measure the natural radioactivity of the phosphate fertilizers in Tunisia. The distribution of various radionuclides during their manufacturing process of fertilizers is also part of this work.

  8. Informatics in radiology: evaluation of an e-learning platform for teaching medical students competency in ordering radiologic examinations.

    LENUS (Irish Health Repository)

    Marshall, Nina L

    2011-09-01

    A preliminary audit of orders for computed tomography was performed to evaluate the typical performance of interns ordering radiologic examinations. According to the audit, the interns showed only minimal improvement after 8 months of work experience. The online radiology ordering module (ROM) program included baseline assessment of student performance (part I), online learning with the ROM (part II), and follow-up assessment of performance with simulated ordering with the ROM (part III). A curriculum blueprint determined the content of the ROM program, with an emphasis on practical issues, including provision of logistic information, clinical details, and safety-related information. Appropriate standards were developed by a committee of experts, and detailed scoring systems were devised for assessment. The ROM program was successful in addressing practical issues in a simulated setting. In the part I assessment, the mean score for noting contraindications for contrast media was 24%; this score increased to 59% in the part III assessment (P = .004). Similarly, notification of methicillin-resistant Staphylococcus aureus status and pregnancy status and provision of referring physician contact information improved significantly. The quality of the clinical notes was stable, with good initial scores. Part III testing showed overall improvement, with the mean score increasing from 61% to 76% (P < .0001). In general, medical students lack the core knowledge that is needed for good-quality ordering of radiology services, and the experience typically afforded to interns does not address this lack of knowledge. The ROM program was a successful intervention that resulted in statistically significant improvements in the quality of radiologic examination orders, particularly with regard to logistic and radiation safety issues.

  9. Invasive growth patterns of juvenile nasopharyngeal angiofibroma: radiological imaging and clinical implications.

    Science.gov (United States)

    Szymańska, Anna; Szymański, Marcin; Czekajska-Chehab, Elżbieta; Szczerbo-Trojanowska, Małgorzata

    2014-07-01

    Juvenile nasopharyngeal angiofibroma is a benign lesion with locally aggressive nature. Knowledge of its typical growth patterns is crucial for precise preoperative staging and adequate preoperative patient counseling. This pictorial essay focuses on characteristic radiological features and paths of invasive growth of this rare tumor. Also, the impact of accurate preoperative evaluation of tumor extensions on surgical planning and results of treatment are discussed. © The Foundation Acta Radiologica 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  10. Radiological diagnostics in hyperparathyroidism

    International Nuclear Information System (INIS)

    Moedder, U.; Kuhn, F.P.; Gruetzner, G.

    1991-01-01

    The most important radiologically detectable effects of the primary and secondary hyperparathyroidism of the skeletal system and the periarticular soft tissue structures are presented. In the following sensitivity and specificity of radiological imaging - sonography, scintigraphy, computed tomography, magnetic resonance imaging, arteriography and selective venous sampling - in the preoperative diagnostic of the parathyroid adenomas are discussed. Therefore, radiological imaging can be omitted before primary surgery. It was only in secondary surgery that radiological process proved useful and a guide during surgical intervention. (orig.) [de

  11. Impression management or real change? Reports of depressive symptoms before and after the preoperative psychological evaluation for bariatric surgery.

    Science.gov (United States)

    Fabricatore, Anthony N; Sarwer, David B; Wadden, Thomas A; Combs, Christopher J; Krasucki, Jennifer L

    2007-09-01

    Many bariatric surgery programs require that candidates undergo a preoperative mental health evaluation. Candidates may be motivated to suppress or exaggerate psychiatric symptoms (i.e., engage in impression management), if they believe doing so will enhance their chances of receiving a recommendation to proceed with surgery. 237 candidates for bariatric surgery completed the Beck Depression Inventory-II (BDI-ll) as part of their preoperative psychological evaluation (Time 1). They also completed the BDI-II approximately 2-4 weeks later, for research purposes, after they had received the mental health professional's unconditional recommendation to proceed with surgery (Time 2). There was a small but statistically significant increase in mean BDI-II scores from Time 1 to Time 2 (11.4 vs 12.7, Ppsychological "clearance" for surgery. Possible explanations for these findings include measurement error, impression management, and true changes in psychiatric status.

  12. Long-term results of a randomized controlled trial evaluating preoperative chemotherapy in resectable non-small cell lung cancer

    Directory of Open Access Journals (Sweden)

    Chen ZW

    2013-06-01

    Full Text Available Zhiwei Chen,* Qingquan Luo,* Hong Jian, Zhen Zhou, Baijun Cheng, Shun Lu, Meilin LiaoShanghai Lung Tumor Clinical Medical Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, People’s Republic of China *These authors contributed equallyObjective: We aimed to evaluate whether preoperative chemotherapy provides benefits in the survival and prognosis of patients with non-small cell lung cancer (NSCLC in resectable stages I to IIIA, except T1N0. Methods: In this randomized, controlled trial, 356 patients with stage I (except for T1N0, II and IIIA NSCLC were assigned to either the preoperative chemotherapy plus surgery arm (179 patients or the primary surgery arm (177 patients. Both treatments were followed by adjuvant chemotherapy. The end point of this study included overall survival (OS, progression-free survival (PFS, and survival rate associated with clinical remission. Results: Statistical survival difference was found between the preoperative chemotherapy plus surgery arm and the surgery-alone arm. However, the median survival time (MST in the preoperative chemotherapy arm was lower than that of surgery-alone arm (MST, 45.42 months vs 57.59 months (P = 0.016. When comparing the effect of preoperative chemotherapy at each stage of NSCLC, a statistical survival difference was found in stage II NSCLC but not in stage I and IIIA (MST 40.86 months vs 80.81 months (P = 0.044. However, no statistically significant difference in PFS was noticed between the two arms, except for stage I NSCLC (hazard radio [HR] = 0.87; 95% CI, 0.561−1.629; P = 0.027. The survival rate was higher for patients who had clinical remission after preoperative chemotherapy, but the differences did not reach statistical significance (MST 42.10 months vs 35.33 months (P = 0.630. Conclusion: Preoperative chemotherapy did not show benefits in OS and PFS for stage I-IIIA NSCLC patients. Keywords: NSCLC, neoadjuvent, mitomycin, cisplatin, vindesine

  13. Long-term results of a randomized controlled trial evaluating preoperative chemotherapy in resectable non-small cell lung cancer

    OpenAIRE

    Chen, Zhiwei; Luo, Qingquan; Jian, Hong; Zhou, Zhen; Cheng, Baijun; Lu, Shun; Liao, Meilin

    2013-01-01

    Zhiwei Chen,* Qingquan Luo,* Hong Jian, Zhen Zhou, Baijun Cheng, Shun Lu, Meilin LiaoShanghai Lung Tumor Clinical Medical Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, People’s Republic of China *These authors contributed equallyObjective: We aimed to evaluate whether preoperative chemotherapy provides benefits in the survival and prognosis of patients with non-small cell lung cancer (NSCLC) in resectable stages I to IIIA, except T1N0. Methods: In this ra...

  14. Quantitative evaluation of risks for individuals in diagnostic radiology

    Energy Technology Data Exchange (ETDEWEB)

    Iinuma, T A; Tateno, Y; Hashizume, T [National Inst. of Radiological Sciences, Chiba (Japan)

    1980-05-01

    A method to estimate quantitatively risks of individual patients due to exposure to diagnostic radiation (carcinogenetic and genetic effects of radiation) was proposed on the basis of ICRP-26. Carcinogenetic effect of radiation was calculated by multiplying mean dose equivalent for each organ per each radiological examination by shortening of average life-expectancy which was calculated from incidence of fetal carcinoma of each organ, latent period of carcinoma, and incidence period of carcinoma. Genetic effect of radiation was calculated by multiplying mean dose equivalent for gonad per each radiological examination by incidence of genetically severe radiation damages due to parent's exposure and child expectancy rate. Three examples were shown on calculations of risks in the photofluorographic examinations of the stomach and chest, and mammography. The same method of calculation could be applied to the in-vivo nuclear medicine examinations. Further investigation was required to calculate the risks quantitatively for various types of diagnostic procedures using radiation.

  15. Radiation exposure and dose evaluation in intraoral dental radiology

    International Nuclear Information System (INIS)

    Poppe, B.; Looe, H. K.; Pfaffenberger, A.; Eenboom, F.; Chofor, N.; Sering, M.; Ruehmann, A.; Poplawski, A.; Willborn, K.

    2007-01-01

    In this study, dose area product measurements have been performed to propose diagnostic reference levels (DRLs) in intraoral dental radiology. Measurements were carried out at 60 X-ray units for all types of intraoral examinations performed in clinical routine. The third quartile values calculated range from 26.2 to 87.0 mGy cm 2 . The results showed that there exists a large difference between the patient exposures among different dental facilities. It was also observed that dentists working with faster film type or higher tube voltage are not always associated with lower exposure. The study demonstrated the necessity to have the DRLs laid out as guidelines in dental radiology. (authors)

  16. Quantitative evaluation of risks for individuals in diagnostic radiology

    International Nuclear Information System (INIS)

    Iinuma, T.A.; Tateno, Yukio; Hashizume, Tadashi

    1980-01-01

    A method to estimate quantitatively risks of individual patients due to exposure to diagnostic radiation (carcinogenetic and genetic effects of radiation) was proposed on the basis of ICRP-26. Carcinogenetic effect of radiation was calculated by multiplying mean dose equivalent for each organ per each radiological examination by shortening of average life-expectancy which was calculated from incidence of fetal carcinoma of each organ, latent period of carcinoma, and incidence period of carcinoma. Genetic effect of radiation was calculated by multiplying mean dose equivalent for gonad per each radiological examination by incidence of genetically severe radiation damages due to parent's exposure and child expectancy rate. Three examples were shown on calculations of risks in the photofluorographic examinations of the stomach and chest, and mammography. The same method of calculation could be applied to the in-vivo nuclear medicine examinations. Further investigation was required to calculate the risks quantitatively for various types of diagnostic procedures using radiation. (Tsunoda, M.)

  17. Clinical and radiological evaluation in vertebral artery dissections

    Directory of Open Access Journals (Sweden)

    Murat Çabalar

    2013-04-01

    Full Text Available In recent years, vertebral artery dissection (VAD is reported more frequently as a cause of young cerebrovascular accidents. It can occur spontaneously or following a neck manipulation and trauma. The patients were 3 females (mean age: 35±26 years and 7 males (mean age: 37.71±4.96 years. Only 2 patients described neck trauma. Cerebellar findings were prominent in all cases. On radiological investigation, vascular changes of vertebral arteries were detected bilaterally in 2 cases, right in 5 and left in 3 cases. All the cases were treated with anticoagulant therapy and cured but 1 with sequela. Prognosis of vertebral artery dissection is generally good by early diagnosis and treatment. In this article, we reported clinical and radiological properties of 10 vertebral artery dissection cases.

  18. Evaluation of the detector response function digital conventional radiology

    International Nuclear Information System (INIS)

    Arino Gil, A.; Hernandez Rodriguez, J.; Mateos Salvador, P.; Rodriguez Lopez, B.; Font Gelabert, J. C.

    2013-01-01

    The objective of this work is to obtain the response function that relates the air kerma at the entrance of the detector and pixel value, for a series of digital detectors of conventional Radiology model Optimus DigitalDiagnost Philips () and 6000 Definium General Electric. From the set of measurements is obtained a response function for each reference type of detector, and compared with those published in the literature for these teams. (Author)

  19. Evaluation system for the analysis of the radiological consequences (RASCAL)

    International Nuclear Information System (INIS)

    Miguel Martinez, M. J. de

    2011-01-01

    The code currently employed by the Spanish Nuclear power is the IRDAM (Interactive Rapid Dose Assessment Model). This code will now be replaced by the RASCAL (Radiological Assessment System for Consequence Analysis) version 4.0. This is a significant improvement in dose calculation for escapes to the atmosphere for radioactive emergencies. The main objective is to highlight the most significant changes introduced in the RASCAL when performing these dose estimates.

  20. Developing and Evaluating Virtual Cardiotomy for Preoperative Planning in Congenital Heart Disease

    DEFF Research Database (Denmark)

    Sørensen, Thomas Sangild; Beerbaum, Philipp; Mosegaard, Jesper

    2009-01-01

    Careful preoperative planning is of outmost importance -- in particular when considering complex corrective surgery on congenitally malformed hearts. As an aid to such decisionsmaking we describe a system for virtual reconstruction of patient-specific morphology from 3D-capable imaging modalities...

  1. Use of positron emission tomography for staging, preoperative response assessment and posttherapeutic evaluation in children with Wilms tumour

    International Nuclear Information System (INIS)

    Misch, Daniel; Steffen, Ingo G.; Furth, Christian; Stoever, Brigitte; Amthauer, Holger; Denecke, Timm; Schoenberger, Stefan; Voelker, Thomas; Henze, Guenter; Hautzel, Hubertus

    2008-01-01

    To evaluate FDG-PET for staging, grading, preoperative response assessment and posttherapeutic evaluation in children with Wilms tumour (WT). In this study, 23 FDG-PET examinations in 12 paediatric patients (female, n=5; male, n=7; age, 1-19 years) with WT (primary, n=9; relapsed, n=3) were analysed. All patients were examined with conventional imaging methods (CIM) according to the SIOP2001/GPOH trial protocol. Additionally, FDG-PET/PET-CT was performed for staging (n = 12), preoperative response assessment (n=6) and posttherapeutic evaluation (n=5). Imaging results of FDG-PET and CIM were analysed regarding the accuracy in tumour visualisation, impact on therapeutic management and preoperative response assessment, with clinical follow-up and histopathology as the standard of reference. FDG-PET and CIM showed concordant results for staging of primary WT, whereas FDG-PET was superior in 1/3 cases with recurrent WT. Concerning histological differentiation, one case with anaplastic WT had an standard uptake value (SUV) of 12.3, which was remarkably higher than the average SUV in the eight cases with intermediate risk histology. No parameter analysed for PET or CIM was reliably predictive for histological regression or clinical outcome. After completion of therapy, FDG-PET was superior to CIM in 2/5 cases in detecting residual disease with therapeutic relevance. FDG-PET does not provide additional information to the traditional imaging work-up for staging WT patients, preoperative response assessment and clinical outcome. FDG-PET was advantageous in ruling out residual disease after completion of first line treatment and in pretherapeutic staging of relapse patients. Furthermore, there seems to be a good correlation of initial SUV and histological differentiation. (orig.)

  2. Preoperative evaluation in infants and children: recommendations of the Italian Society of Pediatric and Neonatal Anesthesia and Intensive Care (SARNePI).

    Science.gov (United States)

    Serafini, G; Ingelmo, P M; Astuto, M; Baroncini, S; Borrometi, F; Bortone, L; Ceschin, C; Gentili, A; Lampugnani, E; Mangia, G; Meneghini, L; Minardi, C; Montobbio, G; Pinzoni, F; Rosina, B; Rossi, C; Sahillioğlu, E; Sammartino, M; Sonzogni, R; Sonzogni, V; Tesoro, S; Tognon, C; Zadra, N

    2014-04-01

    The preoperative assessment involves the process of evaluating the patient's clinical condition, which is intended to define the physical status classification, eligibility for anesthesia and the risks associated with it, thus providing elements to select the most appropriate and individualized anesthetic plan. The aim of this recommendation was provide a framework reference for the preoperative evaluation assessment of pediatric patients undergoing elective surgery or diagnostic/therapeutic procedures. We obtained evidence concerning pediatric preoperative evaluation from a systematic search of the electronic databases MEDLINE and Embase between January 1998 and February 2012. We used the format developed by the Italian Center for Evaluation of the Effectiveness of Health Care's scoring system for assessing the level of evidence and strength of recommendations. We produce a set of consensus guidelines on the preoperative assessment and on the request for preoperative tests. A review of the existing literature supporting these recommendations is provided. In reaching consensus, emphasis was placed on the level of evidence, clinical relevance and the risk/benefit ratio. Preoperative evaluation is mandatory before any diagnostic or therapeutic procedure that requires the use of anesthesia or sedation. The systematic prescription of complementary tests in children should be abandoned, and replaced by a selective and rational prescription, based on the patient history and clinical examination performed during the preoperative evaluation.

  3. Evaluation of the contribution of radiological imaging to the final diagnosis in medical case reports

    International Nuclear Information System (INIS)

    Wiesinger, Isabel; Scharf, Gregor; Platz, Natascha; Dendl, Lena M.; Stroszczynski, Christian; Schreyer, Andreas G.; Pawlik, Michael T.

    2015-01-01

    To evaluate the clinical value and impact of radiological imaging in published medial case reports. We analysed 671 consecutively published case reports of a peer-reviewed medical journal for case reports. The general use of radiological imaging as well as the specific imaging modality used in each case (ultrasound, x-ray, fluoroscopy, CT, MRI) was documented, and most importantly the 'final problem solver', i.e. the diagnostic modality giving the final clue to the patient's diagnosis, was identified. In 511 of 671 (76.1 %) analysed case reports at least one radiological modality was used in the diagnostic cascade. In 28.6 % of all cases the final diagnosis was achieved by radiological imaging. All other cases were solved by the patient's history and physical examination (15.2 %), histology (12.4 %), and blood analysis (9.6 %). When radiology was the 'final problem solver', it was mainly CT (51.6 %) and MRI (30.6 %). In 52.2 % of the case reports the radiological image was included in the article. In case reports published in a prominent general medical journal radiological imaging is an important key player in the diagnostic process. In many cases, it is also the diagnostic tool which ultimately leads to determining the final diagnosis. (orig.)

  4. Evaluation of the contribution of radiological imaging to the final diagnosis in medical case reports

    Energy Technology Data Exchange (ETDEWEB)

    Wiesinger, Isabel; Scharf, Gregor; Platz, Natascha; Dendl, Lena M.; Stroszczynski, Christian; Schreyer, Andreas G. [University Hospital Regensburg, Institute of Radiology, Regensburg (Germany); Pawlik, Michael T. [Intensive Care and Emergency Medicine, Institute of Anaesthesiology, Regensburg (Germany)

    2015-05-01

    To evaluate the clinical value and impact of radiological imaging in published medial case reports. We analysed 671 consecutively published case reports of a peer-reviewed medical journal for case reports. The general use of radiological imaging as well as the specific imaging modality used in each case (ultrasound, x-ray, fluoroscopy, CT, MRI) was documented, and most importantly the 'final problem solver', i.e. the diagnostic modality giving the final clue to the patient's diagnosis, was identified. In 511 of 671 (76.1 %) analysed case reports at least one radiological modality was used in the diagnostic cascade. In 28.6 % of all cases the final diagnosis was achieved by radiological imaging. All other cases were solved by the patient's history and physical examination (15.2 %), histology (12.4 %), and blood analysis (9.6 %). When radiology was the 'final problem solver', it was mainly CT (51.6 %) and MRI (30.6 %). In 52.2 % of the case reports the radiological image was included in the article. In case reports published in a prominent general medical journal radiological imaging is an important key player in the diagnostic process. In many cases, it is also the diagnostic tool which ultimately leads to determining the final diagnosis. (orig.)

  5. The usefulness of CT and MR imaging in the preoperative evaluation of neoplasms of the craniofacial region

    International Nuclear Information System (INIS)

    Grzesiakowska, U.; Tacikowska, M.; Krajewski, R.; Starosciak, S.; Smorczewska, M.; Wiszniewska-Rawlik, D.

    2005-01-01

    The aim of the study was to determine the usefulness of CT and MR imaging in the preoperative evaluation of neoplasms of the craniofacial region. All the patients were treated surgically. CT and/or MR imaging was done in every patient for preoperative evaluation of soft tissue infiltration, destruction of bone structures, and metastasis of lymph nodes of the head and neck. The results of these imagings were compared with surgical evaluations and microscopic examination of postoperative specimens. Both CT and MR imaging have high accuracy in evaluating soft tissue infiltration. CT imaging is much better than MR in evaluating bony destruction. MR imaging is better in evaluating recurrent tumors, in which CT has very low specificity. MR imaging is the only method for evaluating infiltration of the central nervous system.The authors propose the following diagnostic algorithm: CT imaging for initial evaluation before treatment, MR imaging in suspected cases of infiltration of the central nervous system, and MR imaging in recurrent tumors after surgical and radiation treatment. (author)

  6. Evaluation of use of e-Learning in undergraduate radiology education: a review.

    Science.gov (United States)

    Zafar, Saad; Safdar, Saima; Zafar, Aasma N

    2014-12-01

    The aim of this review is to investigate the evaluative outcomes present in the literature according to Kirkpatrick's learning model and to examine the nature and characteristics of the e-Learning interventions in radiology education at undergraduate level. Four databases (PubMed, MEDLINE, Embase, Eric) are searched for publications related to the application of e-Learning in undergraduate radiology education. The search strategy is a combination of e-Learning and Mesh and non Mesh radiology and undergraduate related terms. These search strategies are established in relation to experts of respective domains. The full text of thirty pertinent articles is reviewed. Author's country and study location data is extracted to identify the most active regions and year's are extracted to know the existing trend. Data regarding radiology subfields and undergraduate year of radiology education is extracted along with e-Learning technologies to identify the most prevalent or suitable technologies or tools with respect to radiology contents. Kirkpatricks learning evaluation model is used to categorize the evaluative outcomes reported in the identified studies. The results of this analysis reveal emergence of highly interactive games, audience response systems and designing of wide range of customized tools according to learner needs assessment in radiology education at undergraduate level. All these initiatives are leading toward highly interactive self directed learning environments to support the idea of life-long independent learners. Moreover, majority of the studies in literature regarding e-Learning in radiology at undergraduate level are based on participant satisfaction followed by participant results or outcomes either before or after an intervention or both. There was no research particularly demonstrating performance change in clinical practice or patient outcome as they may be difficult to measure in medical education. Thus clinical competences and performances are

  7. Preoperative evaluation of hyperparathyroidism. The role of dual-phase parathyroid scintigraphy and ultrasound imaging

    International Nuclear Information System (INIS)

    Sukan, A.; Reyhan, M.; Aydin, M.; Yapar, A.F.; Aktas, A.; Sert, Y.; Canpolat, T.

    2008-01-01

    The aim of this study was to evaluate the efficacy of dual-phase 99mTc-methoxyisobutylnitrile (MIBI) parathyroid scintigraphy (PS) and ultrasound (US) in primary (pHPT) and secondary (sHPT) hyperparathyroidism. A total of 69 patients (mean age 47±16; age range 14-79 years), including 19 patients with sHPT were enrolled in this study. Preoperative serum intact parathyroid hormone (iPTH) levels, calcium (Ca), phosphate (P), alkaline phosphatase, and 24-h urinary-free Ca measurements were obtained. Concomitant thyroid pathology was also recorded. Histopathology revealed 30 solitary adenomas and 71 hyperplastic glands in 55 patients. The remaining patients' histopathology revealed normal parathyroid, thyroid, or lymph nodes. The sensitivities of MIBI and US in pUPT were 70% and 60%, respectively. It was 60% for both procedures in sHPT. The overall sensitivity of combined US+MIBI in pHPT and sHPT was 81% and 71%, respectively. The overall specificity of MIBI and US was 87% and 91%; positive predictive value (PPV) was 94% and 92%, respectively. MIBI and US identified the parathyroid pathology in 92% and 85% of patients in the non-concomitant thyroid disease group, and in 53% and 47% of patients in the concomitant thyroid disease group, respectively. The weight of the gland between primary and secondary hyperparathyroidism did not reveal a significant difference (P=0.4). Significant differences were found with respect to age, PTH, Ca, and P levels between the pHPT and sHPT (P<0.001). Intact PTH levels showed significant differences between MIBI positive and negative patients (P=0.013), and also US positive and negative patients (P=0.012). A significant negative correlation was found between iPTH and Ca at sHPT (P<0.001). The concomitancy of thyroid disease greatly influences scintigraphic and ultrasonographic detection of parathyroid pathology in pHPT and sHPT. The combination of MIBI and US appears promising for localizing parathyroid pathology in patients with both

  8. Evaluation of the lacrimal system by radiological methods

    International Nuclear Information System (INIS)

    Francisco, Fabiano Celli; Francisco, Vivian Frida Murta; Mendonca Junior, Adhemar Azevedo de; Carvalho, Antonio Carlos Pires; Fonseca, Lea Mirian Barbosa da; Gutfilen, Bianca; Francisco, Marina Celli

    2007-01-01

    The authors perform a revisional and iconographic study of the lacrimal system by means of radiological methods, namely, conventional radiography, linear tomography, computed tomography and magnetic resonance imaging. Image methods are essential to define diagnosis and therapy, considering that besides demonstrating alterations of the lacrimal system, they may indicate the patients with better prognosis associated with the surgical approach. Considering the lower cost, lower radiation dose, low rate of complications, and level of information that can be obtained dacryocystography by means of linear tomography is recommended as the initial investigation method. (author)

  9. Westinghouse corporate development of a decision software program for Radiological Evaluation Decision Input (REDI)

    International Nuclear Information System (INIS)

    Bush, T.S.

    1995-01-01

    In December 1992, the Department of Energy (DOE) implemented the DOE Radiological Control Manual (RCM). Westinghouse Idaho Nuclear Company, Inc. (WINCO) submitted an implementation plan showing how compliance with the manual would be achieved. This implementation plan was approved by DOE in November 1992. Although WINCO had already been working under a similar Westinghouse RCM, the DOE RCM brought some new and challenging requirements. One such requirement was that of having procedure writers and job planners create the radiological input in work control procedures. Until this time, that information was being provided by radiological engineering or a radiation safety representative. As a result of this requirement, Westinghouse developed the Radiological Evaluation Decision Input (REDI) program

  10. Westinghouse corporate development of a decision software program for Radiological Evaluation Decision Input (REDI)

    Energy Technology Data Exchange (ETDEWEB)

    Bush, T.S. [Westinghosue Idaho Nuclear Co., Inc., Idaho Falls, ID (United States)

    1995-03-01

    In December 1992, the Department of Energy (DOE) implemented the DOE Radiological Control Manual (RCM). Westinghouse Idaho Nuclear Company, Inc. (WINCO) submitted an implementation plan showing how compliance with the manual would be achieved. This implementation plan was approved by DOE in November 1992. Although WINCO had already been working under a similar Westinghouse RCM, the DOE RCM brought some new and challenging requirements. One such requirement was that of having procedure writers and job planners create the radiological input in work control procedures. Until this time, that information was being provided by radiological engineering or a radiation safety representative. As a result of this requirement, Westinghouse developed the Radiological Evaluation Decision Input (REDI) program.

  11. Organ doses in interventional radiology procedures: Evaluation of software

    International Nuclear Information System (INIS)

    Tort, I.; Ruiz-Cruces, R.; Perez-Martinez, M.; Carrera, F.; Ojeda, C.; Diez de los Rios, A.

    2001-01-01

    Interventional Radiology (IR) procedures require large fluoroscopy times and important number of radiological images, so the levels of radiation to patient are high, which leads us to calculate the organ doses. The objective of this work is to estimate and make a comparison of the results given by the different software that we have to do the calculation of organ doses in complex procedures of IR. To do this, 28 patients have been selected, distributed in the 3 procedures with highest doses. The determination of organ doses and effective doses has been made using the projections utilized and different software based on Monte Carlo Methods: Eff-dose, PCXMC and Diasoft. We have obtained very high dispersion in the average organ dose between the 3 programs. In many cases, it is higher than 25% and in some particular cases, it is greater than 100%. Dispersion obtained in effective doses is not so high, being under 20% in all cases. This shows that a better solution is needed to solve the problem of the organ doses calculation; a more accurate method is necessary that brings us to a trustworthy approach to reality, and, at the moment, that we do not dispose of it. (author)

  12. Clinical results of tumor shrinkage and evaluation of quality of life in low rectal carcinoma after preoperative combined treatment

    International Nuclear Information System (INIS)

    Kojima, Osamu; Suganuma, Yasushi; Tamura, Takao; Ohnishi, Kazuyoshi; Nishiue, Takashi; Itoh, Masahiko; Horie, Hiroshi; Sawai, Seiji; Takahashi, Toshio

    1992-01-01

    To improve the surgical rate and the quality of life (QOL) for patients with advanced low rectal carcinoma, we investigated whether preoperative treatments (irradiation and hyperthermia and 5-fluorouracil (5-FU) suppository, irradiation and hyperthermia, irradiation and 5-FU suppository, irradiation alone and 5-FU suppository alone) were useful. The tumor shrinkage rate after preoperative treatments was highest in the irradiation, hyperthermia and 5-FU suppository group. Pathologically complete regression was observed in the 2 of 18 cases (12%). According to our criteria of histological changes, the irradiation, hyperthermia and 5-FU suppository group showed the greatest effectiveness. The 4 year postoperative survival rate and the 4 year local recurrence rate were 100% and 8% in the irradiation, hyperthermia and 5-FU suppository group and the data suggest that these results were the best of the 5 treatments. After the carcinoma was shrunk after irradiation, hyperthermia and 5-FU suppository, the patients could receive curatively a sphincter-saving operation (super-low anterior resection and transanal rectal resection). The fecal continence of 7 patients after sphincter-saving operations was increased as good by manometric study, defecography and clinical evaluation. In conclusion, our data suggest that the preoperative combined treatment of irradiation, hyperthermia and 5-FU suppository prevents local recurrence and increases the possibility of a sphincter-saving operation for advanced rectal carcinoma. (author)

  13. Critical evaluation of German regulatory specifications for calculating radiological exposure

    Energy Technology Data Exchange (ETDEWEB)

    Koenig, Claudia; Walther, Clemens [Hannover Univ. (Germany). Inst. of Radioecology; Smeddinck, Ulrich [Technische Univ. Braunschweig (Germany). Inst. of Law

    2015-07-01

    The assessment of radiological exposure of the public is an issue at the interface between scientific findings, juridical standard setting and political decision. The present work revisits the German regulatory specifications for calculating radiological exposure, like the already existing calculation model General Administrative Provision (AVV) for planning and monitoring nuclear facilities. We address the calculation models for the recent risk assessment regarding the final disposal of radioactive waste in Germany. To do so, a two-pronged approach is pursued. One part deals with radiological examinations of the groundwater-soil-transfer path of radionuclides into the biosphere. Processes at the so-called geosphere-biosphere-interface are examined, especially migration of I-129 in the unsaturated zone. This is necessary, since the German General Administrative Provision does not consider radionuclide transport via groundwater from an underground disposal facility yet. Especially data with regard to processes in the vadose zone are scarce. Therefore, using I-125 as a tracer, immobilization and mobilization of iodine is investigated in two reference soils from the German Federal Environment Agency. The second part of this study examines how scientific findings but also measures and activities of stakeholders and concerned parties influence juridical standard setting, which is necessary for risk management. Risk assessment, which is a scientific task, includes identification and investigation of relevant sources of radiation, possible pathways to humans, and maximum extent and duration of exposure based on dose-response functions. Risk characterization identifies probability and severity of health effects. These findings have to be communicated to authorities, who have to deal with the risk management. Risk management includes, for instance, taking into account acceptability of the risk, actions to reduce, mitigate, substitute or monitor the hazard, the setting of

  14. The clinical and radiological evaluation of pyogenic arthritis

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Young Jun; Kim, Kyung Joo; Yoo, Jung Keun; Kim, Young Chul; Hur, Don [Chosun University College of Medicine, Gwangju (Korea, Republic of)

    1984-12-15

    Pyogenic arthritis remain a difficult problem, despite the availability of a wide range of powerful modern antibiotics. Early and correct diagnosis is imperative to assure the prompt initiation of an effective therapeutic regimen and the prevent of late sequela. Careful clinical, laboratory and roentgenological analysis are fundamental to early and precise diagnosis. Therefore, plain roentgenogram should not be overlooked. A radiological and clinical observation was made in 51 cases of pyogenic arthritis admitted to Chosun University Hospital during the period from January 1976 to December 1983 and following results were obtained. 1. Among the 51 cases, 36 cases (70.6%) were male and 15 cases (29.4%) were females. The most prevalent age was 5 to 9 (27.6%). 2. Symptom duration less than 5 days was in 21 cases (41.2%) and more than 31 days was in 6 cases (11.7%). 3. The most common symptom on admission was pain around the involved joint and others are limitation of motion, swelling, tenderness, fever, local heating and erythema. 4. The underlying causes were composed of unknown in 21 cases (41.2%), trauma in 18 cases (35.3%), infections focus in 8 cases (15.7%) and iatrogenic reason 4 cases (7.8%). 5. The most commonly affected joint was hip joint (45.1%). The other affected sites in order of frequency were knee, ankle, shoulder, S-I and elbow joint. In infants and children, hip and knee joint are commonly affected: in adults, knee joint is most is most commonly affected. 6. In laboratory findings, the number of W.B.C and E.S.R were increased in 56.9%. Symptom duration more than 31 days in 5 cases were increased E.S.R only. Causative microorganism was isolated in 31 cases: the most common microorganism was Staphylococcus aureus in 22 cases. Others are B-hemolytics Stretoocccus, Enterobacteriaceae species and Pseudomonas aeruginosa. 7. In 26 cases (50.9%) of the patients, roentgenographic findings was negative. The most common radiological findings was soft tissue

  15. The clinical and radiological evaluation of pyogenic arthritis

    International Nuclear Information System (INIS)

    Cho, Young Jun; Kim, Kyung Joo; Yoo, Jung Keun; Kim, Young Chul; Hur, Don

    1984-01-01

    Pyogenic arthritis remain a difficult problem, despite the availability of a wide range of powerful modern antibiotics. Early and correct diagnosis is imperative to assure the prompt initiation of an effective therapeutic regimen and the prevent of late sequela. Careful clinical, laboratory and roentgenological analysis are fundamental to early and precise diagnosis. Therefore, plain roentgenogram should not be overlooked. A radiological and clinical observation was made in 51 cases of pyogenic arthritis admitted to Chosun University Hospital during the period from January 1976 to December 1983 and following results were obtained. 1. Among the 51 cases, 36 cases (70.6%) were male and 15 cases (29.4%) were females. The most prevalent age was 5 to 9 (27.6%). 2. Symptom duration less than 5 days was in 21 cases (41.2%) and more than 31 days was in 6 cases (11.7%). 3. The most common symptom on admission was pain around the involved joint and others are limitation of motion, swelling, tenderness, fever, local heating and erythema. 4. The underlying causes were composed of unknown in 21 cases (41.2%), trauma in 18 cases (35.3%), infections focus in 8 cases (15.7%) and iatrogenic reason 4 cases (7.8%). 5. The most commonly affected joint was hip joint (45.1%). The other affected sites in order of frequency were knee, ankle, shoulder, S-I and elbow joint. In infants and children, hip and knee joint are commonly affected: in adults, knee joint is most is most commonly affected. 6. In laboratory findings, the number of W.B.C and E.S.R were increased in 56.9%. Symptom duration more than 31 days in 5 cases were increased E.S.R only. Causative microorganism was isolated in 31 cases: the most common microorganism was Staphylococcus aureus in 22 cases. Others are B-hemolytics Stretoocccus, Enterobacteriaceae species and Pseudomonas aeruginosa. 7. In 26 cases (50.9%) of the patients, roentgenographic findings was negative. The most common radiological findings was soft tissue

  16. The evaluation of radiological and clinical findings of bronchiectasis

    International Nuclear Information System (INIS)

    Yoo, Jung Keun; Kang, Sung Ihn; Kim, Kil Jung; Ko, Seung Sook; Kim, Young Sook; Kim, Young Chul

    1985-01-01

    Bronchiectasis means a permanent abnormal dilatation off one or more large bronchi owing to destruction of the elastic and muscular components of the bronchial wall. Radiological study is the most important and mandatory procedure. Especially bronchography is essential for the definitive diagnosis of bronchiectasis and for the precise delineation of the type and extent of the disease. The radiological and clinical findings of 48 cases of bronchiectasis diagnosed by bronchography and treated at Chosun University Hospital during the 5 years from January 1980 to December 1984 were analyzed retrospectively. The results were as follows; 1. Among the 48 cases, 34 cases (70.8%) were male and 14 cases (29.2%) were female. Peak incidence was in second decade. 2. Chronic cough productive sputum and hemoptysis are main symptoms and others are chest pain, dyspnea and recurrent bouts of pneumonia. The most common physical sign is persistent moist rales over the involved area in 23 cases (47.9%). Others are no sign in 17 cases (35.4%), wheezing in 11 cases (22.9%) and digit clubbing in 3 cases (6.3%). 3. The presumed causes were composed of not known in 30 cases (62.5%)> and complications of measles in 7 cases (14.6%), pertussis in 5 cases (10.4%) and pneumonia in 4 cases (8.3%). Two cases were Kartagener's syndrome and unilateral hyperlucent lung. 4. Plain chest common radiological findings was accentuation of lung marking in 36 cases (85.7%), the others are include in order of frequency; pneumonic infiltration, linear radiolucencies, cystic radiolucencies, decreased affected lung volume, air-fluid, level and pleural thickening. 5. Bilateral bronchiectasis was demonstrated in 11 cases (22.9%) and the disease was much more often involved left lung than right. The most commonly involved lobe is left lower lobe, and the most common site of involvement was the posterior basal segment of the lower lobe. The type of bronchiectasis is cylindrical in 22 cases (45.8%), varicose in 11

  17. Pre-operative evaluation with MR in tetralogy of Fallot and pulmonary atresia with ventricular septal defect

    International Nuclear Information System (INIS)

    Holmqvist, C.; Hochbergs, P.; Bjoerkhem, G.; Brockstedt, S.; Laurin, S.

    2000-01-01

    To assess whether MR imaging could replace angiography in pre-operative evaluation of patients with tetralogy of Fallot and pulmonary atresia with ventricular septal defect (VSD), especially since the surgical correction was done earlier than was previously the rule. Fourteen patients with tetralogy of Fallot (n=10) or pulmonary atresia with VSD (n=4), mean age 7.5±4.4 months, were evaluated with angiocardiography and MR before definitive surgical correction. There was good diagnostic agreement between the two modalities when evaluating right ventricular outflow obstruction; 86% for valvular and 93% for supra valvular stenosis, but the agreement was somewhat lower for the sub valvular obstruction (57%). Surgery findings, however, were in favour of MR in 5 patients concerning the sub valvular right ventricular outflow tract obstruction. MR images identified all stenoses in the right and left pulmonary arteries, but overlooked one stenosis in the main pulmonary artery. MR could evaluate patency in all palliative shunts. Even in this young age group, MR imaging offers a good alternative to angiocardiography for the pre-operative evaluation of the right ventricular outflow tract, the main pulmonary artery and the proximal right and left pulmonary arteries, before definitive surgical correction of tetralogy of Fallot and pulmonary atresia with VSD

  18. Pre-operative evaluation with MR in tetralogy of Fallot and pulmonary atresia with ventricular septal defect

    Energy Technology Data Exchange (ETDEWEB)

    Holmqvist, C.; Hochbergs, P. [Univ. Hospital, Lund (Sweden). Dept of Diagnostic Radiology; Bjoerkhem, G. [Univ. Hospital, Lund (Sweden). Dept of Paediatrics; Brockstedt, S.; Laurin, S. [Univ. Hospital, Lund (Sweden). Dept of Diagnostic Radiology

    2000-01-01

    To assess whether MR imaging could replace angiography in pre-operative evaluation of patients with tetralogy of Fallot and pulmonary atresia with ventricular septal defect (VSD), especially since the surgical correction was done earlier than was previously the rule. Fourteen patients with tetralogy of Fallot (n=10) or pulmonary atresia with VSD (n=4), mean age 7.5{+-}4.4 months, were evaluated with angiocardiography and MR before definitive surgical correction. There was good diagnostic agreement between the two modalities when evaluating right ventricular outflow obstruction; 86% for valvular and 93% for supra valvular stenosis, but the agreement was somewhat lower for the sub valvular obstruction (57%). Surgery findings, however, were in favour of MR in 5 patients concerning the sub valvular right ventricular outflow tract obstruction. MR images identified all stenoses in the right and left pulmonary arteries, but overlooked one stenosis in the main pulmonary artery. MR could evaluate patency in all palliative shunts. Even in this young age group, MR imaging offers a good alternative to angiocardiography for the pre-operative evaluation of the right ventricular outflow tract, the main pulmonary artery and the proximal right and left pulmonary arteries, before definitive surgical correction of tetralogy of Fallot and pulmonary atresia with VSD.

  19. Clinical and radiological evaluation of hybrid hip replacement in various disorders of hip

    Directory of Open Access Journals (Sweden)

    Dhaon B

    2005-01-01

    Full Text Available Background: High rates of loosening of cemented implants led to change in technique of fixation of the implant. Methods: Fifty-nine hips were operated in 42 patients with non-cemented acetabular and cemented femoral components between January 1999 and July 2003. The average age of the patient was 45.2 years in our study. Preoperative diagnosis was avascular necrosis (28, ankylosing spondylitis (18, fracture neck femur (9, rheumatoid arthritis (2 and osteoarthritis (2. Results: At an average follow up of 3.6 years (range 1.2-5.8 years excellent to good results were obtained 92% according to Harris hip criteria. No radiological loosening was noted in any femoral or acetabular component on follow up. One poor result was seen in a case of bilateral ankylosing spondylitis operated on one side. Conclusion: Hybrid THA provides a viable and highly acceptable method of treatment of diseases of hip in young patients.

  20. Radiological evaluation of tumor response in oncological studies (tumor response evaluation)

    International Nuclear Information System (INIS)

    Gebauer, B.; Riess, H.

    2011-01-01

    Purpose: Radiological-morphological response evaluation plays a major role in oncological therapy and studies for approval. Specific criteria have been developed for some tumor entities and chemotherapeutics. Application, limitations and definitions of the most frequently used criteria for tumor response evaluation will be presented. Materials and Methods: Review based on a selective literature research. Results: In clinical oncological therapy studies, WHO and RECIST are the most frequently used criteria to evaluate morphological therapy response. RECIST criteria have been modified recently, especially with respect to the evaluation of lymph nodes, and were published as RECIST 1.1 in 2009. All criteria were originally developed and defined to review clinical multicenter trials for approval. Using these criteria in a clinical situation, certain limitations have to be considered. To evaluate response, a baseline scan before therapy start is mandatory. Special tumor response criteria have been defined for some certain tumor entities. Oncologists and radiologists should define in advance which criteria are used before starting therapy. Conclusion: The use of defined criteria is very important in oncology response evaluation. In-depth knowledge of the criteria and their limits is required for correct usage. (orig.)

  1. Evaluation of the radiological situation of the remedied areas - 30 years after the radiological accident with Cesium-137

    International Nuclear Information System (INIS)

    Correa, R. da S.; Santos, E.E. dos; Barbosa, R.C.; Borges, A.F. de Almeida; Costa, H.F.; Pimenta, L.

    2017-01-01

    In September 1987, the radiation accident resulting from the removal and dismantling of a sealed source containing Cesium-137 chloride happened in Goiânia, GO, Brazil. Due to its high solubility and the weather conditions of the time, there were dispersion in the environment around seven main concentrations, located in the central region. This study aimed to present the evaluation of the radiological situation of the remedied areas - 30 years after the radiation accident with cesium-137. The three main focuses were studied, being the plot of land at the 57 street, Scrap Metal I and II. Radiometric surveys were performed using a SPP2 detector, 10 cm from the floor to evaluate the integrity of the concrete and 1 m from the soil, using the IDENTIFIDER detector model NG + , to compare with the values of background radiation. A 2 x 2m pre-fixed sampling loop was used. In the plot of land at the 57 street, measurements were made at 154 points, at 10 cm from the floor, at a mean of 150 ± 121 cps, while at 1 m from the soil, the average was 0.19 ± 0.10 μSv / h. In the Scrap Metal I were 262 measurements and the average at 10 cm of the floor was 147 ± 113 cps and the 1 meter of the soil was of 0.18 ± 0.12 μSv / h. In Scrap Metal II the average of the 66 measurements carried out at 10 cm was 117 ± 58 cps and at 1 meter it was 0.13 ± 0.03 μSv / h. Currently the radiological situation of the lots, are below the limits established by the norms of CNEN

  2. Utility of Ultraportable Echocardiography in the Preoperative Evaluation of Noncardiac Surgery.

    Science.gov (United States)

    Costa, Jean Allan; Almeida, Maria Lucia Pereira; Estrada, Tereza Cristina Duque; Werneck, Guilherme Lobosco; Rocha, Alexandre Marins; Rosa, Maria Luiza Garcia; Ribeiro, Mario Luiz; Mesquita, Claudio Tinoco

    2016-11-01

    The ultraportable echocardiogram machine, with relevant portability and easiness in performing diagnoses, when in experienced hands, may contribute to the reliability of preoperative evaluation in noncardiac surgeries. To assess cardiac function parameters in patients aged older than 60 years, candidates of elective noncardiac surgeries, classified as ASA1 or ASA 2 according to surgical risk. A total of 211 patients referred for elective surgeries, without suspicion of previous heart diseases, were included in the study. Assessment of patients was conducted by conventional echocardiogram using the ultraportable V Scan (GE) device right after the pre-anesthetic clinical evaluation. We assessed the clinical impact of echocardiography results by using a questionnaire addressed to the anesthetist. Mean age of patients was 68.9 ± 7.0 years, 154 were women. The most frequent surgeries were: a) facectomy - cataract - 18; b) inguinal hernia surgery - 18; c) Cholecystectomy - 16. We found 58 normal tests (27.5%), 70 (33.2%) with mild valve reflux, and 83 (39.3%) with relevant abnormality, such as increase in heart chamber size, global and/or segmental contractile dysfunction, significant valve dysfunction or other unspecified. Test results caused delay of surgical procedure for a more detailed cardiac evaluation in 20 (9.5%) patients, and change in anesthetic management in 7 (3.3%). There was a considerable clinical impact with the use of the ultraportable echocardiography, since one out of every ten patients evaluated had their clinical management changed due to the detection of previously unsuspected, significant heart diseases, with the potential for severe complications. O ecocardiógrafo ultraportátil, com importante mobilidade e facilidade diagnóstica em mãos experientes pode contribuir para a segurança na avaliação pré-operatória em cirurgias não cardíacas. Avaliar os parâmetros de função cardíaca nos pacientes com mais de 60 anos de idade, candidatos

  3. Evaluation of use of e-Learning in undergraduate radiology education: A review

    Energy Technology Data Exchange (ETDEWEB)

    Zafar, Saad, E-mail: saad.zafar@riphah.edu.pk [Riphah International University, Islamabad (Pakistan); Safdar, Saima, E-mail: saima.safdar@riphah.edu.pk [Riphah International University, Islamabad (Pakistan); Zafar, Aasma N., E-mail: aasmarad@gmail.com [Radiology Department, Senior Registrar Shifa College of Medicine and Assistant Consultant Shifa International Hospital, Islamabad (Pakistan)

    2014-12-15

    Highlights: • We have systematically reviewed the literature on use of e-Learning in Radiology at the undergraduate level. • Kirkpatrick's Learning Model is used to evaluate the learning outcomes of the reported studies. • There is an increase in positive response for learning management systems used in blended learning environments. • There are wide range of technologies being used for e-Learning including use of audio response system and customized PAC solutions. • There is a clear trend toward highly interactive, self directed learning environment to support the concept of life long independent learners. - Abstract: Purpose: The aim of this review is to investigate the evaluative outcomes present in the literature according to Kirkpatrick's learning model and to examine the nature and characteristics of the e-Learning interventions in radiology education at undergraduate level. Materials and methods: Four databases (PubMed, MEDLINE, Embase, Eric) are searched for publications related to the application of e-Learning in undergraduate radiology education. The search strategy is a combination of e-Learning and Mesh and non Mesh radiology and undergraduate related terms. These search strategies are established in relation to experts of respective domains. The full text of thirty pertinent articles is reviewed. Author's country and study location data is extracted to identify the most active regions and year's are extracted to know the existing trend. Data regarding radiology subfields and undergraduate year of radiology education is extracted along with e-Learning technologies to identify the most prevalent or suitable technologies or tools with respect to radiology contents. Kirkpatricks learning evaluation model is used to categorize the evaluative outcomes reported in the identified studies. Results: The results of this analysis reveal emergence of highly interactive games, audience response systems and designing of wide range of

  4. Evaluation of use of e-Learning in undergraduate radiology education: A review

    International Nuclear Information System (INIS)

    Zafar, Saad; Safdar, Saima; Zafar, Aasma N.

    2014-01-01

    Highlights: • We have systematically reviewed the literature on use of e-Learning in Radiology at the undergraduate level. • Kirkpatrick's Learning Model is used to evaluate the learning outcomes of the reported studies. • There is an increase in positive response for learning management systems used in blended learning environments. • There are wide range of technologies being used for e-Learning including use of audio response system and customized PAC solutions. • There is a clear trend toward highly interactive, self directed learning environment to support the concept of life long independent learners. - Abstract: Purpose: The aim of this review is to investigate the evaluative outcomes present in the literature according to Kirkpatrick's learning model and to examine the nature and characteristics of the e-Learning interventions in radiology education at undergraduate level. Materials and methods: Four databases (PubMed, MEDLINE, Embase, Eric) are searched for publications related to the application of e-Learning in undergraduate radiology education. The search strategy is a combination of e-Learning and Mesh and non Mesh radiology and undergraduate related terms. These search strategies are established in relation to experts of respective domains. The full text of thirty pertinent articles is reviewed. Author's country and study location data is extracted to identify the most active regions and year's are extracted to know the existing trend. Data regarding radiology subfields and undergraduate year of radiology education is extracted along with e-Learning technologies to identify the most prevalent or suitable technologies or tools with respect to radiology contents. Kirkpatricks learning evaluation model is used to categorize the evaluative outcomes reported in the identified studies. Results: The results of this analysis reveal emergence of highly interactive games, audience response systems and designing of wide range of

  5. Bluish granites from Extremadura (Spain): a radiological evaluation.

    Science.gov (United States)

    Pereira, Dolores; Neves, Luís.; Peinado, Mercedes; Pereira, Alcides; Rodríguez, Leticia; António Blanco, José

    2010-05-01

    We have found in the area of Trujillo (Extremadura, Spain) a variety of striking bluish granites, outcropping within the Plasenzuela pluton. They are all quarried under different names and are characterized by leucocratic minerals such as quartz, feldspar (both potassium and plagioclase), sometimes giving a fenocrystic texture and muscovite, with some biotite. As accessory phases, idiomorphic tourmaline is found. Recently a bluish phosphate distributed in the whole rock was detected, included within most mineral phases and fillings from stressed structures that are cutting the rock. We attribute the bluish color of the granites to this phosphate. Although biotite is almost always transformed to chlorite, the rock gives an excellent response to be polished. Physico-mechanical properties make this bluish granite a perfect option for most applications. Absorption coefficient is rather low and alteration by thermal changes has not been observed. A secondary facies with yellow colour also occurs, spatially close to the topographic surface, and probably represents an alteration product of the original granite. This facies is also commercialized as ornamental stone. A radiological survey was carried out in the field, using a gamma ray spectrometer. The radiological background is quite homogeneous in the pluton, without significant differences between gamma ray fluxes of both facies (altered and non altered). The average contents of U, Th and K2O determined in situ with the spectrometer are 7.4 ppm, 0.8 ppm and 3.67%, respectively (n=15). Using U as a Ra proxy, the I index of the EU technical document 112 can be determined, and results in a value of 0.64 for the referred composition. This implies that the rock can be used without any restrictions for building purposes. However, a marked difference was observed in radon exhalation tests carried out in laboratorial facilities. The dominant blue variety shows radon exhalation rates comprised between 0.02 and 0.04 Bq.kg-1.h-1

  6. Diagnostic accuracy and prognostic impact of restaging by magnetic resonance imaging after preoperative chemoradiotherapy in patients with rectal cancer

    International Nuclear Information System (INIS)

    Huh, Jung Wook; Kim, Hee Cheol; Lee, Soon Jin; Yun, Seong Hyeon; Lee, Woo Yong; Park, Yoon Ah; Cho, Yong Beom; Chun, Ho-Kyung

    2014-01-01

    Background: The prognostic role of restaging rectal magnetic resonance imaging (MRI) in patients with preoperative CRT has not been established. The goal of this study was to evaluate the diagnostic accuracy and prognostic role of radiological staging by rectal MRI after preoperative chemoradiation (CRT) in patients with rectal cancer. Methods: A total of 231 consecutive patients with rectal cancer who underwent preoperative CRT and radical resection from January 2008 to December 2009 were prospectively enrolled. The diagnostic accuracy and prognostic significance of post-CRT radiological staging by MRI was evaluated. Results: The sensitivity, specificity, positive predictive value, and negative predictive value of radiological diagnosis of good responders (ypTNM stage 0–I) were 32%, 90%, 65%, and 69%, respectively. The overall accuracy of MRI restating for good responders was 68%. The 5-year disease-free survival rates of patients with radiological and pathological TNM stage 0, stage I, and stage II–III were 100%, 94%, and 76%, respectively (P = 0.037), and 97%, 87%, and 73%, respectively (P = 0.007). On multivariate analysis, post-CRT radiological staging by MRI was an independent prognostic factor for disease-free survival. Conclusion: Radiological staging by MRI after preoperative CRT may be an independent predictor of survival in patients with rectal cancer

  7. Interim radiological safety standards and evaluation procedures for subseabed high-level waste disposal

    International Nuclear Information System (INIS)

    Klett, R.D.

    1997-06-01

    The Seabed Disposal Project (SDP) was evaluating the technical feasibility of high-level nuclear waste disposal in deep ocean sediments. Working standards were needed for risk assessments, evaluation of alternative designs, sensitivity studies, and conceptual design guidelines. This report completes a three part program to develop radiological standards for the feasibility phase of the SDP. The characteristics of subseabed disposal and how they affect the selection of standards are discussed. General radiological protection standards are reviewed, along with some new methods, and a systematic approach to developing standards is presented. The selected interim radiological standards for the SDP and the reasons for their selection are given. These standards have no legal or regulatory status and will be replaced or modified by regulatory agencies if subseabed disposal is implemented. 56 refs., 29 figs., 15 tabs

  8. The evaluation of preoperative nutritional status in patients undergoing thoracic surgery.

    Science.gov (United States)

    Trufă, D I; Arhire, Lidia Iuliana; Niţă, Otilia; Gherasim, Andreea; Niţă, G; Graur, Mariana

    2014-01-01

    The aim of this study was to assess the preoperative nutritional status of patients undergoing thoracic surgery using different nutritional tools. . We conducted a prospective study on a sample of 43 thoracic patients, including 23 with neoplasms and 20 with non-neoplastic pathology who underwent thoracic surgery procedures between July-September 2011, in the Thoracic Surgery Clinic in Iaşi. Weight and height were measured and body mass index (BMI) was calculated. WHO classification for BMI categories was used. Preoperative serum level of transthyretin (TTR) and demographic data (gender, age) were also assessed. All patients were examined by the Subjective Global Assessment (SGA) and the Nutritional Risk Screening 2002 (NRS 2002). After performing SGA, 67.9% of the patients were well-nourished, 21.4% were moderately or suspected of being malnourished and 10.7% were severely malnourished. The level of TTR was significantly lower in the moderately or severely malnourished group, compared to those considered well-nourished. According to NRS-2002, 42.9% of the patients were considered at nutritional risk. The level of TTR of these patients was lower than the level of TTR of the patients without nutritional risk, but without statistical significance. Subjective Global Assessment (SGA) and the Nutritional Risk Screening 2002 (NRS 2002) are useful in identifying patients with nutritional risk, so that appropriate nutritional management could be initialised even before surgery.

  9. A radiologic evaluation of obstructive jaundice using percutaneous transhepatic cholangiography

    International Nuclear Information System (INIS)

    Schim, G. T.; Kim, T. H.; Zeon, S. K.; Ra, W. Y.

    1980-01-01

    Percutaneous transhepatic cholangiography (P.T.C.) is a most valuable procedure in differentiation of obstructive jaundice, whether benign (chiefly stone) or malignant condition. Authors present the clinical and P.T.C. findings of 30 cases of obstructive jaundice which were experienced from December 1975 to May 1977, at Department of Radiology, Kyung Pook National University Hospital. The summarized results were as follows. 1. The incidence of malignancy beyond the age of 40 was high compared with stone, which revealed relatively equal age distribution. 2. The stone showed as concave cupping in all cases (11 cases), but the malignancy showed as nipple formation (10 cases) and irregular narrowings (9 cases). 3. The dilation of the intrahepatic bile duct appeared 10 cases on malignancy among 19 cases of malignancy (52.6%) and 4 caes on stone which were multiple intrahepatic or common hepatic duct stones. 4. The dilation of the justproximal bile duct was severe on malignancy compared with stone. 5. The mean bilirubin level was high on malignancy (12.8 mg-%) compared with stone (10.3 mg-%).

  10. Evaluating variability and uncertainty in radiological impact assessment using SYMBIOSE

    International Nuclear Information System (INIS)

    Simon-Cornu, M.; Beaugelin-Seiller, K.; Boyer, P.; Calmon, P.; Garcia-Sanchez, L.; Mourlon, C.; Nicoulaud, V.; Sy, M.; Gonze, M.A.

    2015-01-01

    SYMBIOSE is a modelling platform that accounts for variability and uncertainty in radiological impact assessments, when simulating the environmental fate of radionuclides and assessing doses to human populations. The default database of SYMBIOSE is partly based on parameter values that are summarized within International Atomic Energy Agency (IAEA) documents. To characterize uncertainty on the transfer parameters, 331 Probability Distribution Functions (PDFs) were defined from the summary statistics provided within the IAEA documents (i.e. sample size, minimal and maximum values, arithmetic and geometric means, standard and geometric standard deviations) and are made available as spreadsheet files. The methods used to derive the PDFs without complete data sets, but merely the summary statistics, are presented. Then, a simple case-study illustrates the use of the database in a second-order Monte Carlo calculation, separating parametric uncertainty and inter-individual variability. - Highlights: • Parametric uncertainty in radioecology was derived from IAEA documents. • 331 Probability Distribution Functions were defined for transfer parameters. • Parametric uncertainty and inter-individual variability were propagated

  11. Radiological evaluation of G-I tract diverticulum in Korean

    International Nuclear Information System (INIS)

    Sung, Ki Jun; Park, Joong Wha; Hong, In Soo; Kim, Myung Soon

    1986-01-01

    We reviewed 887 cases of esophagogram, 8863 cases of UGI series, 174 cases of small bowel series and 1926 cases of double contrast barium enema performed at the department of Radiology, Wonju College of Medicine from Jan. 1982 to Dec. 1984 to analyzed diverticular disease pattern of the GI tract in Korean. The results were as follows: 1. Esophageal diverticular. The incidence was 3.27% and the sex ratio of male to female was 2.22:1 Age distribution was relatively even and most common in 5th decade. Most of them showed single in number, above 6mm sized and common in middle one third of both lateral side of esophagus. 2. Stomach diverticular. The incidence was 0.07% and the sex ratio of male to female was equal. Multiplicity was single in all cases. Most of them were above 11mm sized and common in gastric fundic area of greater curvature site of stomach. 3. Duodenal diverticular. The incidence was 1.51% and relatively even distribution in sex and age and common in after 5th decade. Most of them showed single in number, 11-30mm sized and common in medial margin of 2nd portion of duodenum. 4. Colonic diverticular. The incidence was 2.34% and predominant in male and common in 5th. and 6th. decade. Most of them showed single in number, below 5mm sized and common in right sided colon.

  12. Radiological evaluation of G-I tract diverticulum in Korean

    Energy Technology Data Exchange (ETDEWEB)

    Sung, Ki Jun; Park, Joong Wha; Hong, In Soo; Kim, Myung Soon [Yeonsei University Wonju College of Medicine, Wonju (Korea, Republic of)

    1986-12-15

    We reviewed 887 cases of esophagogram, 8863 cases of UGI series, 174 cases of small bowel series and 1926 cases of double contrast barium enema performed at the department of Radiology, Wonju College of Medicine from Jan. 1982 to Dec. 1984 to analyzed diverticular disease pattern of the GI tract in Korean. The results were as follows: 1. Esophageal diverticular. The incidence was 3.27% and the sex ratio of male to female was 2.22:1 Age distribution was relatively even and most common in 5th decade. Most of them showed single in number, above 6mm sized and common in middle one third of both lateral side of esophagus. 2. Stomach diverticular. The incidence was 0.07% and the sex ratio of male to female was equal. Multiplicity was single in all cases. Most of them were above 11mm sized and common in gastric fundic area of greater curvature site of stomach. 3. Duodenal diverticular. The incidence was 1.51% and relatively even distribution in sex and age and common in after 5th decade. Most of them showed single in number, 11-30mm sized and common in medial margin of 2nd portion of duodenum. 4. Colonic diverticular. The incidence was 2.34% and predominant in male and common in 5th. and 6th. decade. Most of them showed single in number, below 5mm sized and common in right sided colon.

  13. Skin decontamination cream for radiological contaminants: Formulation development and evaluation.

    Science.gov (United States)

    Khan, Abdul Wadood; Kotta, Sabna; Rana, Sudha; Ansari, Shahid Husain; Sharma, Rakesh Kumar; Ali, Javed

    2013-01-01

    Increased use of the radioactive materials in the field of research, medical, nuclear power plant, and industry has increased the risk of accidental exposure. Intentional use of the radioisotopes by terrorist organizations could cause exposure/contamination of a number of the population. In view of the accidental contamination, there is a need to develop self-usable decontamination formulations that could be used immediately after contamination is suspected. Present work was planned to optimize and develop self-usable radiation decontamination cream formulation. Various pharmaceutical parameters were characterized. (99m)Tc-sodium pertechnetate was used as radiocontaminant. Static counts were recorded before and after decontamination using single photon emission computed tomography. Decontamination efficacy of the cream was found to be 42% ± 3% at 0-0.5 h after the exposure. Primary skin irritancy test was satisfactory as no erythema or edema was observed visually after 2 weeks of the formulation application. The decontamination studies proved the potential of EDTA to remove the radiological contaminants effectively.

  14. B-Flow Twinkling Sign in Preoperative Evaluation of Cervical Lymph Nodes in Patients with Papillary Thyroid Carcinoma

    Directory of Open Access Journals (Sweden)

    Giuseppina Napolitano

    2013-01-01

    Full Text Available Papillary thyroid cancer (PTC is the most common histologic type of differentiated thyroid cancer. The first site of metastasis is the cervical lymph nodes (LNs. The ultrasonography (US is the best diagnostic method for the detection of cervical metastatic LNs. We use a new technique, B-flow imaging (BFI, recently used for evaluation of thyroid nodules, to estimate the presence of BFI twinkling signs (BFI-TS, within metastatic LNs in patients with PTC. Two hundred and fifty-two patients with known PTC were examined for preoperative evaluation with conventional US and BFI. Only 83 with at least one metastatic LN were included. All patients included underwent surgery; the final diagnosis was based on the results of histology. The following LN characteristics were evaluated: shape, abnormal echogenicity, absent hilum, calcifications, cystic appearance, peripheral vascularization, and BFI-TS. A total of 604 LNs were analyzed. Of these, 298 were metastatic, according to histopathology. The BFI-TS showed high values ​​of specificity (99.7% and sensitivity (80.9%. The combination of each conventional US sign with the BF-TS increases the specificity. Our findings suggest that BFI can be helpful in the selection of suspicious neck LNs that should be examined at cytologic examination for accurate preoperative staging and individual therapy selection.

  15. Radiological evaluation of esophageal motility and gastroesophageal reflux disease; Funktionsstoerungen des Oesophagus. Radiologische Diagnostik

    Energy Technology Data Exchange (ETDEWEB)

    Schima, W. [Abt. Roentgen fuer Konservative Faecher, Universitaetsklinik fuer Radiodiagnostik, Wien (Austria); Pokieser, P. [Abt. Roentgen fuer Chirurgische Faecher, Universitaetsklinik fuer Radiodiagnostik, Wien (Austria); Schober, E. [Abt. Roentgen fuer Konservative Faecher, Universitaetsklinik fuer Radiodiagnostik, Wien (Austria)

    1995-10-01

    Radiological evaluation of esophageal motility and the lower esophageal sphincter has gained increased attention in recent years. Videofluoroscopic investigation of esophageal motor function is superior to static film radiography, as repeated analysis of the videotaped recordings is possible. With emphasis on radiological techniques, normal esophagel physiology and motility and a variety of esophageal motor disorders are discussed in this review paper. Radiological evaluation of gastroesophageal reflux and reflux esophagitis is described. Clinical and radiological findings in esophageal motility disorders and gastroesophageal reflux disease and the radiological efficacy compared to that of manometry and pH-metry are discussed. (orig.) [Deutsch] Die radiologische Untersuchung des Oesophagus kann nicht nur strukturelle Veraenderungen, sondern auch funktionelle Stoerungen mit einer hohen Treffsicherheit nachweisen. Die Videokinematographie ist hierbei der konventionellen Roentgenuntersuchung aufgrund der Moeglichkeit der wiederholten Analyse ueberlegen. Ziel der vorliegenden Uebersicht ist es, prinzipiell das radiologische Erscheinungsbild der normalen Funktion sowie diagnostische Kriterien fuer verschiedene Motilitaetsstoerungen zu demonstrieren. Weiterhin werden auch die verschiedenen Moeglichkeiten der radiologischen Refluxpruefung zur Untersuchung der Funktion des gastrooesophagealen Sphinkters verglichen und deren Wert diskutiert. Die Pruefung der Funktion von Oesophagus und gastrooesophagealem Sphinkter als ein integraler Bestandteil der Roentgenuntersuchung der Speiseroehre verbessert deren Treffsicherheit, wodurch die radiologische Untersuchung die primaere diagnostische Methode bei Patienten mit Schluckstoerungen darstellt. (orig.)

  16. Radiological evaluation of a liver simulator in comparison to a human real liver

    International Nuclear Information System (INIS)

    Toledo, Janine M.; Campos, Tarcisio P.R. de

    2009-01-01

    The present study evaluates the radiological features of a human real healthy liver reproducing its characteristics on a developed liver simulator. The radiological evaluation will be performed through radiological methods such as CT and X-ray images, density and weight measurements, as well as representation of the coloration and texture. According to literature, the liver is the highest weight organ and gland of the body, weighing approximately 1,5 kg. On the liver, the nutrients are absorbed from the digestive tract and are prosecuted and stored for future use by other organs. Also the liver is responsible for the neutralization and elimination of various toxic substances. Thus, it is an interface between the digestive system and the blood. Besides, this organ is the principal source of plasmatic proteins like the albumin, transport of graxos oily acids. Due to its proprieties, the liver holds a large amount of radionuclides on any uptake from external source. The liver simulator was designed to have the same density, weight and corresponding shape. The radiographic image was produced by conventional X-rays machine, in which the radiographic applied parameters were the same applied to abdomen. The result of the radiographic and CT images demonstrates radiological equivalence between the simulator and human real liver. Hounsfield number of the synthetic liver tissue was found on the range of human livers. Therefore, due to its similar shape, chemical composition, radiological response, the liver simulator can be used to investigate ionizing radiation procedures during radiation therapy intervention. (author)

  17. Radiological consequence evaluation of DBAs with alternative source term method for a Chinese PWR

    International Nuclear Information System (INIS)

    Li, J.X.; Cao, X.W.; Tong, L.L.; Huang, G.F.

    2012-01-01

    Highlights: ► Radiological consequence evaluation of DBAs with alternative source term method for a Chinese 900 MWe PWR has been investigated. ► Six typical DBA sequences are analyzed. ► The doses of control room, EAB and outer boundary of LPZ are acceptable. ► The differences between AST method and TID-14844 method are investigated. - Abstract: Since a large amount of fission products may releases into the environment, during the accident progression in nuclear power plants (NPPs), which is a potential hazard to public risk, the radiological consequence should be evaluated for alleviating the hazard. In most Chinese NPPs the method of TID-14844, in which the whole body and thyroid dose criteria is employed as dose criteria, is currently adopted to evaluate the radiological consequences for design-basis accidents (DBAs), but, due to the total effective dose equivalent is employed as dose criteria in alternative radiological source terms (AST) method, it is necessary to evaluate the radiological consequences for DBAs with AST method and to discuss the difference between two methods. By using an integral safety analysis code, an analytical model of the 900 MWe pressurized water reactor (PWR) is built and the radiological consequences in DBAs at control room (CR), exclusion area boundary (EAB), low population zone (LPZ) are analyzed, which includes LOCA and non-LOCA DBAs, such as fuel handling accident (FHA), rod ejection accident (REA), main steam line break (MSLB), steam generator tube rupture (SGTR), locked rotor accident (LRA) by using the guidance of the RG 1.183. The results show that the doses in CR, EAB and LPZ are acceptable compared with dose criteria in RG 1.183 and the differences between AST method and TID-14844 method are also discussed.

  18. Exploratory use of cardiovascular magnetic resonance imaging in liver transplantation: a one-stop shop for preoperative cardiohepatic evaluation.

    Science.gov (United States)

    Reddy, Sahadev T; Thai, Ngoc L; Fakhri, Asghar A; Oliva, Jose; Tom, Kusum B; Dishart, Michael K; Doyle, Mark; Yamrozik, June A; Williams, Ronald B; Grant, Saundra B; Poydence, Jacqueline; Shah, Moneal; Singh, Anil; Nathan, Swami; Biederman, Robert W W

    2013-11-15

    Preoperative cardiovascular risk stratification in orthotopic liver transplantation candidates has proven challenging due to limitations of current noninvasive modalities. Additionally, the preoperative workup is logistically cumbersome and expensive given the need for separate cardiac, vascular, and abdominal imaging. We evaluated the feasibility of a "one-stop shop" in a magnetic resonance suite, performing assessment of cardiac structure, function, and viability, along with simultaneous evaluation of thoracoabdominal vasculature and liver anatomy. In this pilot study, patients underwent steady-state free precession sequences and stress cardiac magnetic resonance (CMR), thoracoabdominal magnetic resonance angiography, and abdominal magnetic resonance imaging (MRI) on a standard MRI scanner. Pharmacologic stress was performed using regadenoson, adenosine, or dobutamine. Viability was assessed using late gadolinium enhancement. Over 2 years, 51 of 77 liver transplant candidates (mean age, 56 years; 35% female; mean Model for End-stage Liver Disease score, 10.8; range, 6-40) underwent MRI. All referred patients completed standard dynamic CMR, 98% completed stress CMR, 82% completed late gadolinium enhancement for viability, 94% completed liver MRI, and 88% completed magnetic resonance angiography. The mean duration of the entire study was 72 min, and 45 patients were able to complete the entire examination. Among all 51 patients, 4 required follow-up coronary angiography (3 for evidence of ischemia on perfusion CMR and 1 for postoperative ischemia), and none had flow-limiting coronary disease. Nine proceeded to orthotopic liver transplantation (mean 74 days to transplantation after MRI). There were six ascertained mortalities in the nontransplant group and one death in the transplanted group. Explant pathology confirmed 100% detection/exclusion of hepatocellular carcinoma. No complications during CMR examination were encountered. In this proof-of-concept study, it

  19. Evidence-based radiology: a new approach to evaluate the clinical practice of radiology; Evidenzbasierte Radiologie: Ein neuer Ansatz zur Bewertung von klinisch angewandter radiologischer Diagnostik und Therapie

    Energy Technology Data Exchange (ETDEWEB)

    Puig, S. [Univ.Klinik fuer Radiodiagnostik, Medizinische Univ. Wien (Austria); Forschungsprogramm fuer Evidenzbasierte Medizinische Diagnostik, Inst. fuer Public Health, Paracelsus Medizinische Privatuniversitaet, Salzburg (Austria); Felder-Puig, R. [Ludwig-Boltzmann-Inst. fuer Health Technology Assessment, Vienna (Austria)

    2006-07-15

    Over the last several years, the concept and methodology of evidence-based medicine (EBM) have received significant attention in the scientific community. However, compared to therapeutic medical disciplines, EBM-based radiological publications are still underrepresented. This article summarizes the principles of EBM and discusses the possibilities of their application in radiology. The presented topics include the critical appraisal of studies on the basis on EBM principles, the explanation of EBM-relevant statistical outcome parameters (e.g., ''likelihood ratio'' for diagnostic and ''number needed to treat'' for interventional procedures), as well as the problems facing evidence-based radiology. Evidence-based evaluation of radiological procedures does not only address aspects of cost-effectiveness, but is also particularly helpful in identifying patient-specific usefulness. Therefore it should become an integral part of radiologist training. (orig.)

  20. Radiological evaluation of intestinal obstruction in neonate and infant

    Energy Technology Data Exchange (ETDEWEB)

    Jeon, D. S.; Lim, K. Y.; Kim, S. J.; Kim, J. D.; Rhee, H. S. [Presbyterian Medical Center, Jeonju (Korea, Republic of)

    1980-12-15

    281 cases of neonatal and infantile intestinal obstruction confirmed by clinical and surgical procedure from 1975 till 1979 were reviewed radiologically. The result was as follows; 1. Intussusception was the most common cause of intestinal obstruction under one year of age (173/281: 61.56%), and other causes of descending order were infantile hypertrophic pyloric stenosis (20: 7.11%), congenital megacolon (19: 6.76%), anorectal malformation (17: 6.05%), meconium plug syndrome (17: 6.05%), hernia (12: 4.27%), band adhesion (8: 2.85%), rotation anomaly (5: 1.78%), small bowel atresia (3: 1.07%), Meckel's diverticulum (3: 1.07%), duodenal atresia (2: 0.71%), meconium ileus (1: 0.36%) and annular pancreas (1: 0.36%). Congenital type of intestinal obstruction (we classified intussusception acquired and others congenital) occupied 38.44%. 2. The ratio of male to female was 3: 1, congenital type 4.69 : 1 and acquired 2.39 : 1. 3. Vomiting, bloody stool, fever and abdominal distention were the most 4 symptoms. 4. The frequency of typical mechanical ileus pattern on plain abdomen films was 226 cases(80.43%) paralytic ileus or normal finding was 52 cases (18.51%) and pneumoperitoneum with ileus sign was 3 cases (1.06%). 5. Barium meal or enema was performed in 228 cases and narrowing or obstructed site was found in 213 cases of them (93.42%); intussusception 100% (173/173), infantile hypertrophic pyloric stenosis 93.33% (14/15) and congenital megacolon 82.35% (14/17). 6. Only 10 cases had associated disease such as Mongolism, thoracic kyphosis and scoliosis, microcolon, prematurity, ileocolic fistula, undescended testicle and hydrocele. 7. Meconium plug syndrome, duodenal atresia, small bowel atresia, mecondium ileus and annular pancreas were developed early after birth with average onset age of 3.6 days.

  1. Radiological evaluation of intestinal obstruction in neonate and infant

    International Nuclear Information System (INIS)

    Jeon, D. S.; Lim, K. Y.; Kim, S. J.; Kim, J. D.; Rhee, H. S.

    1980-01-01

    281 cases of neonatal and infantile intestinal obstruction confirmed by clinical and surgical procedure from 1975 till 1979 were reviewed radiologically. The result was as follows; 1. Intussusception was the most common cause of intestinal obstruction under one year of age (173/281: 61.56%), and other causes of descending order were infantile hypertrophic pyloric stenosis (20: 7.11%), congenital megacolon (19: 6.76%), anorectal malformation (17: 6.05%), meconium plug syndrome (17: 6.05%), hernia (12: 4.27%), band adhesion (8: 2.85%), rotation anomaly (5: 1.78%), small bowel atresia (3: 1.07%), Meckel's diverticulum (3: 1.07%), duodenal atresia (2: 0.71%), meconium ileus (1: 0.36%) and annular pancreas (1: 0.36%). Congenital type of intestinal obstruction (we classified intussusception acquired and others congenital) occupied 38.44%. 2. The ratio of male to female was 3: 1, congenital type 4.69 : 1 and acquired 2.39 : 1. 3. Vomiting, bloody stool, fever and abdominal distention were the most 4 symptoms. 4. The frequency of typical mechanical ileus pattern on plain abdomen films was 226 cases(80.43%) paralytic ileus or normal finding was 52 cases (18.51%) and pneumoperitoneum with ileus sign was 3 cases (1.06%). 5. Barium meal or enema was performed in 228 cases and narrowing or obstructed site was found in 213 cases of them (93.42%); intussusception 100% (173/173), infantile hypertrophic pyloric stenosis 93.33% (14/15) and congenital megacolon 82.35% (14/17). 6. Only 10 cases had associated disease such as Mongolism, thoracic kyphosis and scoliosis, microcolon, prematurity, ileocolic fistula, undescended testicle and hydrocele. 7. Meconium plug syndrome, duodenal atresia, small bowel atresia, mecondium ileus and annular pancreas were developed early after birth with average onset age of 3.6 days

  2. Preoperative Evaluation and Endovascular Procedure of Intraoperative Aneurysm Rupture During Thoracic Endovascular Aortic Repair

    Energy Technology Data Exchange (ETDEWEB)

    Zha, Bin-Shan, E-mail: binszha2013@163.com; Zhu, Hua-Gang, E-mail: huagzhu@yeah.net; Ye, Yu-Sheng, E-mail: yeyusheng@aliyun.com; Li, Yong-Sheng, E-mail: 872868848@qq.com; Zhang, Zhi-Gong, E-mail: zzgedward@sina.com; Xie, Wen-Tao, E-mail: 345344347@qq.com [The First Affiliated Hospital of Anhui Medical University, Department of Vascular Surgery (China)

    2017-03-15

    Thoracic aortic aneurysms are now routinely repaired with endovascular repair if anatomically feasible because of advantages in safety and recovery. However, intraoperative aneurysm rupture is a severe complication which may have an adverse effect on the outcome of treatment. Comprehensive preoperative assessment and considerate treatment are keys to success of endovascular aneurysm repair, especially during unexpected circumstances. Few cases have reported on intraoperative aortic rupture, which were successfully managed by endovascular treatment. Here, we present a rare case of an intraoperative aneurysm rupture during endovascular repair of thoracic aortic aneurysm with narrow neck and angulated aorta arch (coarctation-associated aneurysm), which was successfully treated using double access route approach and iliac limbs of infrarenal devices.Level of EvidenceLevel 5.

  3. Bone scintigraphy in the preoperative evaluation of osteoid osteoma and osteoblastoma of the spine

    International Nuclear Information System (INIS)

    Papanicolaou, N.; Treves, S.

    1984-01-01

    Six young patients with biopsy proven osteoid osteoma or osteoblastoma of the spine underwent preoperative bone scintigraphy. Intense focal uptake of the radionuclide by the pathologic process was observed in all of them. Pinhole collimation imaging was an essential part of the examination, since it allowed accurate localization of the lesions as well as determination of their extent. In three patients, plain radiographs of the spine were initially reported as normal. The scintigrams guided and complemented subsequent positive tomographic studies in four patients. In our experience, a normal bone scan virtually excludes the diagnosis of either one of these entities. Bonne scintigraphy should be performed in patients with symptoms strongly suggestive of vertebral osteoid osteoma or osteoblastoma and normal or inconclusive radiographs [fr

  4. Multidetector-row computed tomography for the preoperative evaluation of axillary nodal status in patients with breast cancer

    International Nuclear Information System (INIS)

    Ogasawara, Yutaka; Doihara, Hiroyoshi; Shiraiwa, Misaki; Ishihara, Setsuko

    2008-01-01

    We evaluated the effectiveness of multidetector-row computed tomography (MD-CT) for detecting axillary lymph nodal status (ALNS) in patients with breast cancer. We reviewed 42 patients with breast cancer. A metastatic lymph node on MD-CT was defined as oval or round, with more than 5 mm on the short axis. We evaluated ALNS preoperatively by both palpation and MD-CT findings and performed sentinel lymph node biopsy (SLNB) and complete axillary lymph node dissection (ALND). For establishing the ALNS, MD-CT showed a sensitivity of 76.9%, a specificity of 96.6%, and an accuracy of 90.5%. On the basis of the MD-CT findings, misdiagnosis was made in 4 of the 42 patients, only one of which was false positive. On the other hand, one patient with a histologically negative sentinel lymph node (SLN) result had metastasis only in a non-SLN. Preoperative MD-CT showed a positive node in this patient. Multidetector-row computed tomography assists in identifying women who require ALND without SLNB, with sufficient positive predictive value. False-negative detection by SLNB could be avoided with careful interpretation of the axillary lymph nodes shown by MD-CT. (author)

  5. Diagnostic imaging of hilar cholangiocarcinoma: preoperative evaluation of ERC, MRC and PTC in comparison with histopathology

    International Nuclear Information System (INIS)

    Romaneehsen, B.; Mainz Univ.; Otto, G.; Lohse, A.W.; Bittinger, F.; Herber, S.; Oberholzer, K.; Pitton, M.B.; Thelen, M.

    2004-01-01

    Purpose: To compare the results of the preoperative workup consisting of endoscopic retrograde cholangiography (ERC), magnetic resonance cholangiography (MRC), and percutaneous resonance cholangiography (PTC) with the tumor extent of the surgical specimen in patients with hilar cholangiocarcinoma (hilCC). Materials and Methods: Between 9/1997 and 12/2002. 59 patients with hilCC tumor underwent surgical resection. Preoperative ERC, MRC, and PTC were analyzed, blinded for the identity of the patient, and compared with the surgical specimen. For this retrospective analysis, 55 of the initial 59 ERCs, 39 of the initial 40 MRCs and 32 of the initial 38 PTCs were available. Most of the ERCs and MRCs had been performed at referring institutions by various investigators. In 20 patients, all three imaging modalities were available for direct comparison. Results: The mean scores of the visualization of the bile ducts and tumor differ considerably for ERC, MRC and PTC, with PTC visualizing the bile ducts better than ERC (p<0.001) and MRC (p=0.019). The tumor classification according to Bismuth and Corlette was correctly predicted by ERC in 29%, by MRC in 36% and by PTC in 53%. The tumor extent was overestimated in 40% (ERC), 41% (MRC) and 31% (PTC) and underestimated in less than 10% for all modalities. Twenty patients, who underwent all three imaging modalities, were included in an additional analysis for a direct comparison of ERC, MRC and PTC. PTC provided correct or acceptable information on tumor extent in 19 of 20 patients, MRC in 15 of 20 patients, and ERC in only 11 of 20 patients. The statistical analysis revealed a significant superiority of PTC to ERC (McNemar test: p<0.01) but not to MRC (p=0.22). (orig.)

  6. Gastric emptying, glucose metabolism and gut hormones: evaluation of a common preoperative carbohydrate beverage.

    Science.gov (United States)

    Vermeulen, Mechteld A R; Richir, Milan C; Garretsen, Martijn K; van Schie, Annelies; Ghatei, Mohammed A; Holst, Jens J; Heijboer, Annemieke C; Uitdehaag, Bernard M J; Diamant, Michaela; Eekhoff, E Marelise W; van Leeuwen, Paul A M; Ligthart-Melis, Gerdien C

    2011-09-01

    To study the gastric-emptying rate and gut hormonal response of two carbohydrate-rich beverages. A specifically designed carbohydrate-rich beverage is currently used to support the surgical patient metabolically. Fruit-based beverages may also promote recovery, due to natural antioxidant and carbohydrate content. However, gastric emptying of fluids is influenced by its nutrient composition; hence, safety of preoperative carbohydrate loading should be confirmed. Because gut hormones link carbohydrate metabolism and gastric emptying, hormonal responses were studied. In eight volunteers, gastric emptying rates of both 400 mL of a ready-to-use beverage (A: Nutricia preOp; 50.4 g carbohydrates-mainly polysaccharides; 260 mOsm/kg) and 400 mL over-the-counter fruit-based lemonade (B: Roosvicee Original; 48 g carbohydrates--mainly fruit-associated saccharides; 805 mOsm/kg) were determined scintigraphically (using hepatate Tc-99(m)) according to a crossover design. Plasma glucose, insulin, C-peptide, glucagon-like peptide (GLP-1), peptide YY, total glucagon, and ghrelin were studied. Gastric emptying showed no differences in residual volumes. Earlier onset in emptying for beverage A versus B was observed (trend), with significantly higher glucose, insulin, C-peptide, and glucagon responses at 15-90 min. GLP-1 was inversely related to residual volume. Fruit-based lemonade is a safe alternative for preoperative purposes. It induces a more limited glucose, insulin, and C-peptide response. Later onset in gastric emptying (B versus A: trend), lower glucagon release, and differences in beverage content and osmolarity may have contributed to those differences. Efficient emptying was reflected by early GLP-1 levels. Copyright © 2011 Elsevier Inc. All rights reserved.

  7. Effects of the platelet rich plasma on apexogenesis in young monkeys: Radiological and hystologycal evaluation

    Directory of Open Access Journals (Sweden)

    Petrović Vanja

    2012-01-01

    Full Text Available Platelet-reach plasma (PRP is an attractive tool in regenerative medicine due to its ability to stimulate proliferation and differentiation of stem cells. Since dental pulp derived stem cells are recognized as central in apexogenesis, the aim of the study was to evaluate radiologically and histologically effects of PRP on apexogenesis in teeth with immature roots. The study included eight monkeys (Cercopithecus Aethiops divided in two equal groups for evaluation 3 and 12 months after treatment. All participants obtained the same treatment including pulpotomy and after-treatment with: hydroxiapatite (HA-incisor and HA+canine PRP. Radiological evaluation was performed using the long cone paralleling technique for recording of defined parameters and histological evaluation was performed using tissue removed en block for the observation of parameters related to apexogenesis. The results obtained radiologically and histologically have shown increase in bridge formation in HA+PRP (75% group after 3 months comparing to HA group (50%. Contrary to that, after 12 months there were no significant differences between groups. The root delay was not registered in the HA+PRP group contrary to HA group where it was registered in 25% after 12 months. Results of the study suggest that PRP is a powerful tool for intensive and rapid apexogenesis since it offers clear and comprehensive results (mostly in the first three months which are early radiologically visible without any failure in the proposed requests.

  8. Investigation of evaluation method for marine radiological impact during an accident

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-08-15

    In 2012, JNES carried out to investigate the measurement information of radionuclide released to the ocean at Fukushima Daiichi NPP accident, the foreign regulation for marine radiological impact, and the evaluation method for release and diffusion to the ocean at the accident inside and outside Japan. (author)

  9. Effects of the Platelet Rich Plasma on Apexogenesis in Young Monkeys: Radiological and Hystologycal Evaluation

    International Nuclear Information System (INIS)

    Petrović, Vanja; Pejčić, Natasa; Rakić, Mia; Leković, V.; Stojić, Ž; Vasić, Una

    2012-01-01

    Platelet-reach plasma (PRP) is an attractive tool in regenerative medicine due to its ability to stimulate proliferation and differentiation of stem cells. Since dental pulp derived stem cells are recognized as central in apexogenesis, the aim of the study was to evaluate radiologically and histologically effects of PRP on apexogenesis in teeth with immature roots. The study included eight monkeys (Cercopithecus Aethiops) divided in two equal groups for evaluation 3 and 12 months after treatment. All participants obtained the same treatment including pulpotomy and after-treatment with: hydroxiapatite (HA)-incisor and HA+canine PRP. Radiological evaluation was performed using the long cone paralleling technique for recording of defined parameters and histological evaluation was performed using tissue removed en block for the observation of parameters related to apexogenesis. The results obtained radiologically and histologically have shown increase in bridge formation in HA+PRP (75%) group after 3 months comparing to HA group (50%). Contrary to that, after 12 months there were no significant differences between groups. The root delay was not registered in the HA+PRP group contrary to HA group where it was registered in 25% after 12 months. Results of the study suggest that PRP is a powerful tool for intensive and rapid apexogenesis since it offers clear and comprehensive results (mostly in the first three months) which are early radiologically visible without any failure in the proposed requests

  10. Effects of the Platelet Rich Plasma on Apexogenesis in Young Monkeys: Radiological and Hystologycal Evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Petrović, Vanja; Pejčić, Natasa; Rakić, Mia; Leković, V.; Stojić, Ž [University of Belgrade, School of Dentistry (Serbia); Vasić, Una [University of Belgrade, Faculty of Medicine (Serbia)

    2012-07-01

    Platelet-reach plasma (PRP) is an attractive tool in regenerative medicine due to its ability to stimulate proliferation and differentiation of stem cells. Since dental pulp derived stem cells are recognized as central in apexogenesis, the aim of the study was to evaluate radiologically and histologically effects of PRP on apexogenesis in teeth with immature roots. The study included eight monkeys (Cercopithecus Aethiops) divided in two equal groups for evaluation 3 and 12 months after treatment. All participants obtained the same treatment including pulpotomy and after-treatment with: hydroxiapatite (HA)-incisor and HA+canine PRP. Radiological evaluation was performed using the long cone paralleling technique for recording of defined parameters and histological evaluation was performed using tissue removed en block for the observation of parameters related to apexogenesis. The results obtained radiologically and histologically have shown increase in bridge formation in HA+PRP (75%) group after 3 months comparing to HA group (50%). Contrary to that, after 12 months there were no significant differences between groups. The root delay was not registered in the HA+PRP group contrary to HA group where it was registered in 25% after 12 months. Results of the study suggest that PRP is a powerful tool for intensive and rapid apexogenesis since it offers clear and comprehensive results (mostly in the first three months) which are early radiologically visible without any failure in the proposed requests.

  11. EVALUATION OF THE ADA TECHNOLOGIES' ELECTRO-DECON PROCESS TO REMOVE RADIOLOGICAL CONTAMINATION

    International Nuclear Information System (INIS)

    Pao, Jenn-Hai; Demmer, Rick L.; Argyle, Mark D.; Veatch, Brad D.

    2003-01-01

    A surface decontamination system featuring the use of ADA's electrochemical process was tested and evaluated. The process can be flexibly deployed by using an electrolyte delivery system that has been demonstrated to be reliable and effective. Experimental results demonstrate the effectiveness of this system for the surface decontamination of radiologically contaminated stainless steel

  12. Radiological investigation of renovascular hypertension from IVU to digital subtraction angiography. A critical evaluation

    International Nuclear Information System (INIS)

    Amiel, M.; Froment, A.; Pinet, F.; Huguet, M.

    1986-01-01

    For the last 20 years, the value of radiology in renovascular hypertension (RVH) is well established from diagnostic and therapeutic points of view. However things are changing now due to a better appraisal of the incidence of RVH, new antihypertensive drugs, and new radiological procedures (digital angiography, percutaneous transluminal angioplasty). The approach now takes in account the mode of imaging for a better evaluation of the renal artery stenosis and costs of the proceedings as well. Finally a new strategy has been set up for RVH patients management [fr

  13. Evaluation of diagnostic radiology services in five Latin American countries: Results for mammography

    International Nuclear Information System (INIS)

    Brandan, M.E.; Caspani, C.E.M.; Mora, R. de la; Miranda, A.A.; Plazas, M.-C.; Borras, C.

    2001-01-01

    Under the auspices of PAHO/WHO, a multicentric investigation is carried out in five Latin American countries. Its aim is to correlate quality indicators of radiology services with the accuracy of the radiological interpretation as determined by a panel of experts. We present preliminary results from mammographic imaging facilities, which indicate that the failure to comply with the international standards of quality control produces images of unacceptable quality, as measured either by using a phantom or by an independent evaluation of the clinical images. (author)

  14. Preliminary evaluation of the radiological quality of the water on Bikini and Eneu Islands

    International Nuclear Information System (INIS)

    Noshkin, V.E.; Wong, K.M.; Eagle, R.J.; Brown, G.

    1975-01-01

    In June of 1975 a survey was conducted to determine the residual radioactivity in the terrestrial environment on the two main islands (Eneu and Bikini) of Bikini Atoll. The objective was to evaluate the potential radiation doses that could be received by the Bikinians scheduled to return to their atoll. This report describes the radiological quality of the groundwater during June 1975 (from data obtained from water samples collected at old and new well sites on both islets) and the cistern water on Bikini island. Based on the analyses of these samples, the cistern water from Bikini Island is both chemically and radiologically acceptable as drinking water in accordance with standard limits established by the U. S. Public Health Service. On both islands the quality of the ground water varies from one site to another. At some wells both chemical and radiological quality are acceptable; at others one or both is unacceptable according to U. S. Public Health Standards

  15. Analysis and evaluation of the radiological aspects of scoliosis

    International Nuclear Information System (INIS)

    Vargas Gonzalez, Paula

    2012-01-01

    The theme of scoliosis is proposed from the radiological perspective. An extensive literature review is realized, extracting the most relevant information for research. The initiation and evolution of scoliosis has been silent, therefore, to meet this condition has been important to detect it early and opportunely, before that curvatures have progressed and become structured, forcing the surgical treatment. The timely correction of curvatures in the spine has generated significant conditions in the patient's life. The early diagnosis has been fundamental to realize an opportune treatment of orthopedic type. A great variety of congenital and developmental disorders have been evident in the spine. The causes and patterns of the abnormal curvature of the spine have been varied. Precise diagnosis of these alterations is supported on a careful clinical assessment and is aided by imaging explorations, such as conventional radiography, computed tomography, ultrasound and magnetic resonance. Imaging methods to detect scoliosis are mentioned. The measurement procedures of the angle of spine curve are determined. The classification of scoliosis according to King-Lenke are cited to facilitate objective assessment of a disease for examiners, making that the results are presented in shape uniform and comparable possible. The types of scoliosis are explained. The characterization of the deformities of the axis of the spine, quantification and estimation of the degree of skeletal maturity has been the principal objective of the spine radiography. In an radiography has been important to be included all the thoracolumbar spine from C7. The Cobb and Ferguson measurements are used to measure angles, Risser for skeletal maturation, Nas and Moe for vertical rotation. Congenital deformities should be taken into account in radiographs of spine. Each vertebra is examined minutely in search of malformations of fusion, etc., that explain scoliosis. In neurological disorders, to take

  16. Radiological evaluation of long term complications of oral rehabilitations of thin ridges with titanium blade implants

    Directory of Open Access Journals (Sweden)

    P. Diotallevi

    2014-03-01

    Full Text Available Aim: The aim of this study was to assess the sensitivity of orthopantomography (OPT in the diagnosis of long term complications in oral rehabilitations with blade implants. Materials and methods A total of 235 blade implants in 189 patients, inserted between 1988 and 2003, were retrospectively analyzed. The records consisted of a first OPT taken between January and December 2010, and a second one 12 months after. The evaluation of implant health considered: integrity of the blade, normal radiological representation of the bone around the implant, dense and cortical appearance of bone around the implant collar. The evaluation of radiological complications considered: implant fracture, bone resorption around the implant, recession of the bone around the implant collar. Results The sensitivity of the panoramic evaluation was equal to 100%. The complications detected were 5 cases of periimplantitis, 9 cases of bone pericervical bone recession and 3 cases of fracture of the implant body. In cases of pericervical bone resorption the following radiological check up 12 months after the first one showed the progression of the disease in 6 out of 9 cases, with irreversible implant failure. In subjects with a radiological pattern of implant health there were no complications in the subsequent check up after 12 months. In the subjects with complications the specificity was equal to 100%. Conclusion The radiographic evaluation by the means of OPT has shown high sensitivity in the diagnosis of long term complications of oral rehabilitations with blade implants and allows prompt therapeutic interventions. Radiological complications appeared mostly in the long term check ups and mainly consisted in recession of the bone around the neck or around the entire implant. More rarely implant fractures occurred, which, in the case of blades, sometimes were not associated with any clinical symptoms: therefore, postsurgical evaluation should not be separated from

  17. Applicability of preoperative nuclear morphometry to evaluating risk for cervical lymph node metastasis in oral squamous cell carcinoma.

    Directory of Open Access Journals (Sweden)

    Masaaki Karino

    Full Text Available BACKGROUND: We previously reported the utility of preoperative nuclear morphometry for evaluating risk for cervical lymph node metastases in tongue squamous cell carcinoma. The risk for lymph node metastasis in oral squamous cell carcinoma, however, is known to differ depending on the anatomical site of the primary tumor, such as the tongue, gingiva, mouth floor, and buccal mucosa. In this study, we evaluated the applicability of this morphometric technique to evaluating the risk for cervical lymph node metastasis in oral squamous cell carcinoma. METHODS: A digital image system was used to measure the mean nuclear area, mean nuclear perimeter, nuclear circular rate, ratio of nuclear length to width (aspect ratio, and nuclear area coefficient of variation (NACV. Relationships between these parameters and nodal status were evaluated by t-test and logistic regression analysis. RESULTS: Eighty-eight cases of squamous cell carcinoma (52 of the tongue, 25 of the gingiva, 4 of the buccal mucosa, and 7 of the mouth floor were included: 46 with positive node classification and 42 with negative node classification. Nuclear area and perimeter were significantly larger in node-positive cases than in node-negative cases; however, there were no significant differences in circular rate, aspect ratio, or NACV. We derived two risk models based on the results of multivariate analysis: Model 1, which identified age and mean nuclear area and Model 2, which identified age and mean nuclear perimeter. It should be noted that primary tumor site was not associated the pN-positive status. There were no significant differences in pathological nodal status by aspect ratio, NACV, or primary tumor site. CONCLUSION: Our method of preoperative nuclear morphometry may contribute valuable information to evaluations of the risk for lymph node metastasis in oral squamous cell carcinoma.

  18. Ultrasonographic diagnosis of fatty liver in preoperative evaluation of living liver donor candidates: Histologic correlation

    International Nuclear Information System (INIS)

    Kim, Seong Hyun; Lee, Won Jae; Lim, Hyo Keun; Kim, Soo Ah; Kim, Seung Hoon; Lee, Soon Jin; Lim, Jae Hoon

    2003-01-01

    To analyze the correlation between the ultrasonographic (US) grading system of fatty liver (FL) and histologic grading system in living liver donor candidates and to investigate the clinical significance of this qualitative US grading system in the selection of living donor candidates. For a recent 21-month period, ninety three living donor candidates who underwent both preoperative US and parenchymal biopsy of the liver were consecutively selected. FL was ultrasonographically graded using the well-known three-Point grading system (ie, mild, moderate and severe degrees) whereas histologic grade of FL was divided into minimal ( 60%) degrees depending upon the percentages of each of macrovesicular, microvesicular and total fat-containing hepatocytes. US grade and histologic grade of FL in each patient were retrospectively correlated according to the US and pathologic records in their databases. Statistical analysis was conducted with the chi-square test and linear by linear association. US findings included the normal liver, mild FL, and moderate FL in 63, 23 and 7 patients, respectively. Analyzed with the total fat content, 38 of 63 patients (60%) whose US finding was normal proved to have FL of various histologic grades. Meanwhile, US grade of FL correlated well with the histologic grade in 16 (53%) of 30 patients who showed mild or moderate FL on US, and in the remaining patients, US grade was more commonly underestimated compared to the histologic grade. All patients with moderate FL on US Proved to have either moderate or severe FL at histology. US grade statistically correlated well with the histologic grade classified by either the total or macrovesicular fat contents (p<.001) while a poor correlation was seen when histologic grade using the microvesicular fat content was used. The well-known qualitative US grading system of fatty liver seems to show a relatively good correlation with the histologic grade, but it has a tendency to underestimate compared to the

  19. Comparison of CT and 18F-FDG PET for Detecting Peritoneal Metastasis on the Preoperative Evaluation for Gastric Carcinoma

    International Nuclear Information System (INIS)

    Lim, Joon Seok; Kim, Myeong Jin; Yun, Mi jin

    2006-01-01

    The aim of our study was to compare the accuracy of CT and 18 F-FDG PET for detecting peritoneal metastasis in patients with gastric carcinoma. One-hundred-twelve patients who underwent a histologic confirmative exam or treatment (laparotomy, n = 107; diagnostic laparoscopy, n = 4; peritoneal washing cytology, n = 1) were retrospectively enrolled. All the patients underwent CT and 18 F-FDG PET scanning for their preoperative evaluation. The sensitivities, specificities and accuracies of CT and 18 FFDG PET imaging for the detection of peritoneal metastasis were calculated and then compared using Fisher's exact probability test (p 18 F-FDG PET imaging for detecting peritoneal metastasis. Based on the original preoperative reports, CT and 18 F-FDG PET showed sensitivities of 76.5% and 35.3% (p = 0.037), specificities of 91.6% and 98.9% (p = 0.035), respectively, and equal accuracies of 89.3% (p = 1.0). The receptor operating characteristics curve analysis showed a significantly higher diagnostic performance for CT (Az 0.878) than for PET (Az = 0.686) (p 0.004). The interobserver agreement for detecting peritoneal metastasis was good (κ value = 0.684) for CT and moderate ((κ value = 0.460) for PET. For the detection of peritoneal metastasis, CT was more sensitive and showed a higher diagnostic performance than PET, although CT had a relatively lower specificity than did PET

  20. Application gives the technique the analytic tree in the evaluation the effectiveness programs to radiological protection

    International Nuclear Information System (INIS)

    Perez Gonzalez, F.; Perez Velazquez, R.S.; Fornet Rodriguez, O.; Mustelier Hechevarria, A.; Miller Clemente, A.

    1998-01-01

    In the work we develop the IAEA recommendations in the application the analytic tree as instrument for the evaluation the effectiveness the occupational radiological protection programs. Is reflected like it has been assimilated and converted that technique in daily work istruments in the evaluation process the security conditions in the institutions that apply the nuclear techniques with a view to its autorization on the part of the regulatory organ

  1. Injuries of the spine: Current concepts of radiological evaluation

    International Nuclear Information System (INIS)

    Du Mesnil de Rochemont, R.; Lanfermann, H.; Heindel, W.

    1997-01-01

    This review discusses the usefulness of plain radiography, computed tomography (CT), and magnetic resonance imaging (MRI) in the evaluation of spinal trauma. The indications for the different imaging modalities in dependence on the specific pattern of injury are explored. Plain radiography still remains the prime method in the diagnosis of acute spinal trauma but there are substantial deficits, especially in the evaluation of the occipitocervical and the cervicothoracic junction as well as in the evaluation of the integrity of posterior vertebral body line. If injury in these regions is suspected CT should follow plain radiography immediately. In the case of spinal trauma with unexplained neurologic deficits MRI is the method of choice for the detection of spinal cord injury. Recommendations with regard to instability and the classification of specific injuries, including examples of typical findings are presented. (orig.) [de

  2. Evaluation of noninvasive tests for the preoperative staging of carcinoma of the esophagus: a prospective study

    International Nuclear Information System (INIS)

    Inculet, R.I.; Keller, S.M.; Dwyer, A.; Roth, J.A.

    1985-01-01

    A prospective study was undertaken to define the usefulness of conventional full-lung linear tomography, radionuclide liver plus spleen and bone scans, and thoracic and abdominal computed tomography for the preoperative staging of carcinoma of the esophagus. Thirty-three patients with carcinoma of the esophagus were studied. The computed tomographic (CT) scan of the thorax and upper abdomen was the single most accurate noninvasive study. With computed tomography, the relationship of the tumor to the tracheobronchial tree was the feature most useful in predicting local resectability. In all patients with the finding of tracheobronchial compression by the tumor, the tumor could not be resected completely. The predictive value of this CT finding in patients with locally unresectable tumor was high (0.83), indicating its usefulness in assessing unresectability. The CT finding of visible separation between tumor mass and tracheobronchial tree was present in 10 of 14 patients with locally resectable tumor (predictive value, 0.63). However, tumor abutting the tracheobronchial tree without compression was a poor predictor of unresectability (predictive value, 0.36). The radionuclide bone scan was the only other noninvasive study to demonstrate a metastasis not evident by CT scan. The combination of chest and abdominal CT scan, bone scan, and bronchoscopy before operation will accurately stage the majority of patients with esophageal cancer but no noninvasive test is of sufficient reliability to exclude patients from operative resection if otherwise indicated

  3. Radiologic findings of struma ovarii

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jong Chul [Chungnam National Univ. School of Medicine, Taejeon (Korea, Republic of); Shin, Hyun Ja [Korea Veterans Hospital, Seoul (Korea, Republic of); Kim, Seung Hyup [Seoul National Univ. College of Medicine, Seoul (Korea, Republic of); Byun, Jae Young [Catholic Univ. College of Medicine, Seoul (Korea, Republic of)

    1997-01-01

    Struma ovarii is ovarian tumor composed solely or predominantly of thyroid tissue or tumor in which hyperthyroidism results from ovarian thyroid tissue, and usually occurs in tandem with cystic teratoma. Ovarian cystic teratoma is radiologically easily diagnosed due to calcification or fat, for example, but the preoperative diagnosis of struma ovarii is often difficult due to rare characteristic features of thyroid tissue. Our purpose was to determine whether there were specific findings of struma ovarii which distinguished it from other ovarian tumors, and this involved analysis of its radiologic findings. Using ultrasonography, computed tomography, and magnetic resonance imaging, preoperative radiologic findings of pathologically-proven struma ovarii in eleven patients were retrospectively evaluated for site, margin, nature (cystic, solid, mixed), contrast enhancement, septa, mural nodule, calcification, fat, and metastasis. These findings were compared with pathologic findings. All eleven tumors were unilateral, ten had smooth tumor margins, seven were mixed cystic and solid tumors (more than 70% of solid components in one tumor), and nine had regular septa. Three of four cystic masses (one unilocular, one bilocular and two multilocular cysts) had mural nodules. Calcifications were found in two tumors, and fat in one. Malignant change or metastasis was not found in any tumor. In one patient with hyperthyroidism due to struma ovarii, symptoms and signs of this subsided after removal of the tumor on salpingo-oophorectomy. Most cases of struma ovarii occurred unilaterally within ovarian teratomas in premenopausal women, and were mixed cystic and solid masses with smooth margins that are commonly enhanced on contrast enhanced scans. In one patient, hyperthyroidism was caused by struma ovarii. There were, however, no specific radiologic findings that were sufficiently typical to suggest the correct preoperative diagnosis of struma ovarii.

  4. Radiologic findings of struma ovarii

    International Nuclear Information System (INIS)

    Kim, Jong Chul; Shin, Hyun Ja; Kim, Seung Hyup; Byun, Jae Young

    1997-01-01

    Struma ovarii is ovarian tumor composed solely or predominantly of thyroid tissue or tumor in which hyperthyroidism results from ovarian thyroid tissue, and usually occurs in tandem with cystic teratoma. Ovarian cystic teratoma is radiologically easily diagnosed due to calcification or fat, for example, but the preoperative diagnosis of struma ovarii is often difficult due to rare characteristic features of thyroid tissue. Our purpose was to determine whether there were specific findings of struma ovarii which distinguished it from other ovarian tumors, and this involved analysis of its radiologic findings. Using ultrasonography, computed tomography, and magnetic resonance imaging, preoperative radiologic findings of pathologically-proven struma ovarii in eleven patients were retrospectively evaluated for site, margin, nature (cystic, solid, mixed), contrast enhancement, septa, mural nodule, calcification, fat, and metastasis. These findings were compared with pathologic findings. All eleven tumors were unilateral, ten had smooth tumor margins, seven were mixed cystic and solid tumors (more than 70% of solid components in one tumor), and nine had regular septa. Three of four cystic masses (one unilocular, one bilocular and two multilocular cysts) had mural nodules. Calcifications were found in two tumors, and fat in one. Malignant change or metastasis was not found in any tumor. In one patient with hyperthyroidism due to struma ovarii, symptoms and signs of this subsided after removal of the tumor on salpingo-oophorectomy. Most cases of struma ovarii occurred unilaterally within ovarian teratomas in premenopausal women, and were mixed cystic and solid masses with smooth margins that are commonly enhanced on contrast enhanced scans. In one patient, hyperthyroidism was caused by struma ovarii. There were, however, no specific radiologic findings that were sufficiently typical to suggest the correct preoperative diagnosis of struma ovarii

  5. Evaluation process radiological in ternopil region method of box models

    Directory of Open Access Journals (Sweden)

    І.В. Матвєєва

    2006-02-01

    Full Text Available  Results of radionuclides Sr-90 flows analyses in the ecosystem of Kotsubinchiky village of Ternopolskaya oblast were analyzed. The block-scheme of ecosystem and its mathematical model using the box models method were made. It allowed us to evaluate the ways of dose’s loadings formation of internal irradiation for miscellaneous population groups – working people, retirees, children, and also to prognose the dynamic of these loadings during the years after the Chernobyl accident.

  6. Radiological evaluation of esophageal speech on total laryngectomee

    International Nuclear Information System (INIS)

    Chung, Tae Sub; Suh, Jung Ho; Kim, Dong Ik; Kim, Gwi Eon; Hong, Won Phy; Lee, Won Sang

    1988-01-01

    Total laryngectomee requires some form of alaryngeal speech for communication. Generally, esophageal speech is regarded as the most available and comfortable technique for alaryngeal speech. But esophageal speech is difficult to train, so many patients are unable to attain esophageal speech for communication. To understand mechanism of esophageal of esophageal speech on total laryngectomee, evaluation of anatomical change of the pharyngoesophageal segment is very important. We used video fluoroscopy for evaluation of pharyngesophageal segment during esophageal speech. Eighteen total laryngectomees were evaluated with video fluoroscopy from Dec. 1986 to May 1987 at Y.U.M.C. Our results were as follows: 1. Peseudoglottis is the most important factor for esophageal speech, which is visualized in 7 cases among 8 cases of excellent esophageal speech group. 2. Two cases of longer A-P diameter at the pseudoglottis have the best quality of esophageal speech than others. 3. Two cases of mucosal vibration at the pharyngoesophageal segment can make excellent esophageal speech. 4. The cases of failed esophageal speech are poor aerophagia in 6 cases, abscence of pseudoglottis in 4 cases and poor air ejection in 3 cases. 5. Aerophagia synchronizes with diaphragmatic motion in 8 cases of excellent esophageal speech.

  7. Evaluation of radiology as a tool to diagnose pulmonic lesions in calves, for example prior to experimental infection studies

    DEFF Research Database (Denmark)

    Tegtmeier, Conny; Arnbjerg, J.

    2000-01-01

    The aim of the study was to evaluate radiology as a technique to visualize pulmonary lesions in young calves, e.g. as a selection criterion for research animals in order to eliminate animals with lung lesions Drier to experimental studies of pneumonia. Five calves with acute clinical signs...... of pneumonia were included in a direct comparative study of radiological and post mortem findings. Also, a number of animals with no signs of pneumonia were included as controls. The study revealed good agreement between the radiological and post mortem findings. Thus, in conclusion, radiology should...

  8. Evaluation of radiological dispersion/consequence codes supporting DOE nuclear facility SARs

    International Nuclear Information System (INIS)

    O'Kula, K.R.; Paik, I.K.; Chung, D.Y.

    1996-01-01

    Since the early 1990s, the authorization basis documentation of many U.S. Department of Energy (DOE) nuclear facilities has been upgraded to comply with DOE orders and standards. In this process, many safety analyses have been revised. Unfortunately, there has been nonuniform application of software, and the most appropriate computer and engineering methodologies often are not applied. A DOE Accident Phenomenology and Consequence (APAC) Methodology Evaluation Program was originated at the request of DOE Defense Programs to evaluate the safety analysis methodologies used in nuclear facility authorization basis documentation and to define future cost-effective support and development initiatives. Six areas, including source term development (fire, spills, and explosion analysis), in-facility transport, and dispersion/ consequence analysis (chemical and radiological) are contained in the APAC program. The evaluation process, codes considered, key results, and recommendations for future model and software development of the Radiological Dispersion/Consequence Working Group are summarized in this paper

  9. Usability evaluation of Laboratory and Radiology Information Systems integrated into a hospital information system.

    Science.gov (United States)

    Nabovati, Ehsan; Vakili-Arki, Hasan; Eslami, Saeid; Khajouei, Reza

    2014-04-01

    This study was conducted to evaluate the usability of widely used laboratory and radiology information systems. Three usability experts independently evaluated the user interfaces of Laboratory and Radiology Information Systems using heuristic evaluation method. They applied Nielsen's heuristics to identify and classify usability problems and Nielsen's severity rating to judge their severity. Overall, 116 unique heuristic violations were identified as usability problems. In terms of severity, 67 % of problems were rated as major and catastrophic. Among 10 heuristics, "consistency and standards" was violated most frequently. Moreover, mean severity of problems concerning "error prevention" and "help and documentation" heuristics was higher than of the others. Despite widespread use of specific healthcare information systems, they suffer from usability problems. Improving the usability of systems by following existing design standards and principles from the early phased of system development life cycle is recommended. Especially, it is recommended that the designers design systems that inhibit the initiation of erroneous actions and provide sufficient guidance to users.

  10. Evaluation of CROES Nephrolithometry Nomogram as a Preoperative Predictive System for Percutaneous Nephrolithotomy Outcomes.

    Science.gov (United States)

    Kumar, Sumit; Sreenivas, Jayaram; Karthikeyan, Vilvapathy Senguttuvan; Mallya, Ashwin; Keshavamurthy, Ramaiah

    2016-10-01

    Scoring systems have been devised to predict outcomes of percutaneous nephrolithotomy (PCNL). CROES nephrolithometry nomogram (CNN) is the latest tool devised to predict stone-free rate (SFR). We aim to compare predictive accuracy of CNN against Guy stone score (GSS) for SFR and postoperative outcomes. Between January 2013 and December 2015, 313 patients undergoing PCNL were analyzed for predictive accuracy of GSS, CNN, and stone burden (SB) for SFR, complications, operation time (OT), and length of hospitalization (LOH). We further stratified patients into risk groups based on CNN and GSS. Mean ± standard deviation (SD) SB was 298.8 ± 235.75 mm 2 . SB, GSS, and CNN (area under curve [AUC]: 0.662, 0.660, 0.673) were found to be predictors of SFR. However, predictability for complications was not as good (AUC: SB 0.583, GSS 0.554, CNN 0.580). Single implicated calix (Adj. OR 3.644; p = 0.027), absence of staghorn calculus (Adj. OR 3.091; p = 0.044), single stone (Adj. OR 3.855; p = 0.002), and single puncture (Adj. OR 2.309; p = 0.048) significantly predicted SFR on multivariate analysis. Charlson comorbidity index (CCI; p = 0.020) and staghorn calculus (p = 0.002) were independent predictors for complications on linear regression. SB and GSS independently predicted OT on multivariate analysis. SB and complications significantly predicted LOH, while GSS and CNN did not predict LOH. CNN offered better risk stratification for residual stones than GSS. CNN and GSS have good preoperative predictive accuracy for SFR. Number of implicated calices may affect SFR, and CCI affects complications. Studies should incorporate these factors in scoring systems and assess if predictability of PCNL outcomes improves.

  11. Radiologic evaluation of the horse relevant to purchase

    International Nuclear Information System (INIS)

    Poulos, P.W. Jr.

    1992-01-01

    Adequate radiographic evaluation of the horse relevant to purchase examination requires the successful integration of technique, interpretation, and reporting. A thorough knowledge of lameness and disease can be masked by incorrect interpretation resulting from poor-quality films or an incomplete examination. Thus, care must be taken to produce an adequate number of high-quality films on which to base a report, which allows you to describe changes that are present. This information, coupled with your physical examination, other laboratory data, and the knowledge of the expressed use of the horse will allow you to advise prospective owners on the decision that they will ultimately make

  12. Radiologic and histopathologic evaluation of various contrast media for bronchography

    International Nuclear Information System (INIS)

    Kang, Eun Young; Hong, Ki Taek; Kim, Jin Hyung; Kim, Hyung Rae; Shin, Bong Kyung; Oh, Yu Whan; Kim, Han Kyeom; Park, Cheol Min; Seol, Hae Young; Cha, In Ho

    1999-01-01

    To determine which contrast media are both efficient and safe for the imaging of airways. We evaluated five contrast media (barium, gastrografin, iotrolan, ioxaglate, iopentol) in terms of image quality and their effects on the lungs of 25 white rabbits. For bronchography 0.5ml of contrast media was used. In each contrast group, HRCT scans were obtained immediately (n=5), 12 hours (n=4), 1 day (n=3), 2 days (n=2), and 1 week (n=1) after bronchography. Histopathologic specimens were obtained immediately, 12 hours, 1 day, 2 days, and 1 week later. Bronchograms were evaluated for image quality by three radiologists working independently, and were scored as 1(poor), 2(moderate), or 3(good) in terms of contrast quality and bronchial coating. HRCT was evaluated by two radiologists who reached a concensus;they determined the presence of contrast media, and then the pattern and extent of pulmonary opacity, and any related changes. Histopatholgic specimens were evaluated by two pathologists who sought consensus as to the extent of inflammation, pulmonary edema, and hemorrhage, and any changes in these aspects. Bronchography indicated that the sum of scores for contrast quality was 45 for barium, 33 for gastrografin, 28 for iotrolan, 30 for ioxaglate, and 28 for iopentol, while for each of these media, the sum of scores for bronchial coating was 39, 19, 25, 23, and 21, respectively. Barium showed the best image quality. In all rabbits, HRCT demonstrated the variable extent of ground-glass attenuation and/or consolidation. Lesions were most extensive at 1-2days and then regressed at 1 week;these HRCT findings correlated well with histologic findings. In histologic studies of all five contrast media groups, variable severe inflammatory reactions were observed, with or without necrosis, congesion, edema, and hemorrhage. It was noted that ioxaglate appeared to cause least tissue reaction. The imaging results of this experimental study indicate that for bronchography, barium is

  13. Interictal SPECT of rCBF is of clinical utility in the preoperative evaluation of patients with partial epilepsy

    DEFF Research Database (Denmark)

    Andersen, A R; Hansen, B A; Høgenhaven, H

    1996-01-01

    Fifty-eight patients with drug-resistant partial epilepsy were studied preoperatively by interictal rCBF measurements using 99mTc-HMPAO and a dedicated brain SPECT camera (Tomomatic 64). Follow-up of seizure outcome, using the "Engel score", was at least 3 years. The data were analyzed in a blinded...... set-up, first visually and subsequently quantitatively by an automatic regional analysis. By visual analysis 95% of the patients were considered abnormal in one part of the brain, of whom 27% were abnormal on CT, 45% on MRI and 98% on scalp EEG. Using a quantitative regional analysis subdividing each...... patients ictal SPECT of rCBF was additionally performed. In 2 cases it added further information to the patient evaluation....

  14. Interictal SPECT of rCBF is of clinical utility in the preoperative evaluation of patients with partial epilepsy

    DEFF Research Database (Denmark)

    Andersen, A.R.; Hansen, B.A.; Hogenhaven, H

    1996-01-01

    Fifty-eight patients with drug-resistant partial epilepsy were studied preoperatively by interictal rCBF measurements using 99mTc-HMPAO and a dedicated brain SPECT camera (Tomomatic 64). Follow-up of seizure outcome, using the 'Engel score', was at least 3 years. The data were analyzed in a blinded...... set-up, first visually and subsequently quantitatively by an automatic regional analysis. By visual analysis 95% of the patients were considered abnormal in one part of the brain, of whom 27% were abnormal on CT, 45% on MRI and 98% on scalp EEG. Using a quantitative regional analysis subdividing each...... patients ictal SPECT of rCBF was additionally performed. In 2 cases it added further information to the patient evaluation...

  15. Assessment of value of spiral CT in preoperative evaluation of endovascular graft exclusion for abdominal aortic aneurysm

    International Nuclear Information System (INIS)

    Jing Zaiping; Zhao Jun; Zhu Wenjiang; Xiao Yi

    1998-01-01

    Purpose: The assess the value of spiral CT (SCT) in preoperative evaluation of endovascular graft exclusion (EVGE) for abdominal aortic aneurysm (AAA). Methods: 41 case with AAA received SCT scanning. Two and three dimensional images were reconstructed, utilizing the shaded surface display (SSD), maximum-intensity Projection (MIP) and multiplanar reformation (MPR). Information were obtained regarding the size and features of AAA, length and diameters of aneurysm's neck, status of the branches of aorta, etc. Results: Nine patients had spinal CT study prior EVGE procedure and the grafts selected according to the parameters obtained by SCT matched perfectly to the needs of deployment. Conclusion: CTA provides high quality images. It is a high-speed and non-invasive method which can provide three-dimensional images of AAA and its main branches and all the parameters needed in EVGE

  16. Development and validation of a questionnaire to evaluate infection control in oral radiology

    Science.gov (United States)

    Pinelli, Camila; da Silva Tagliaferro, Elaine P; Corrente, José E; Ambrosano, Glaucia M B

    2017-01-01

    Objectives: To create and validate a questionnaire to evaluate infection control in oral radiology. Methods: The questionnaire was developed after review of the literature, which included published articles and the biosafety protocols available from healthcare agencies. The initial version of the questionnaire was composed of 14 multiple choice questions and was divided into 3 domains on handwashing, disinfection/protection of surfaces and disinfectant used. Content validity was assessed by two expert committees, which reviewed the content and scope of the questionnaire and the relevance of each item, respectively. Reliability was evaluated using test–retest and internal consistency methods with 115 undergraduate dentistry students. Construct validity was assessed using the known-groups technique and factor analysis. The known-groups technique involved 641 undergraduate dentistry students, 20 PhD students and 15 oral radiology professors. In the factor analysis, 3 radiology technicians also participated in addition to the 641 undergraduates, 20 PhD students and 15 oral radiology professors. Results: The content validity results were found to be satisfactory to excellent for the ordinal variables (intraclass correlation coefficient = 0.722–1.000) and good to great for the yes/no questions (kappa = 0.662–0.913) in terms of reliability and good internal consistency (Cronbach's alpha = 0.88). After a factor analysis, some questions were excluded, and the questions were grouped into new domains. Significant differences were observed between answers from different groups. The final version of the questionnaire was composed of nine domains. Conclusions: The questionnaire created was found to exhibit good psychometric properties for assessing infection control in oral radiology. PMID:28112553

  17. Preoperative short hookwire placement for small pulmonary lesions: evaluation of technical success and risk factors for initial placement failure.

    Science.gov (United States)

    Iguchi, Toshihiro; Hiraki, Takao; Matsui, Yusuke; Fujiwara, Hiroyasu; Masaoka, Yoshihisa; Tanaka, Takashi; Sato, Takuya; Gobara, Hideo; Toyooka, Shinichi; Kanazawa, Susumu

    2018-05-01

    To retrospectively evaluate the technical success of computed tomography fluoroscopy-guided short hookwire placement before video-assisted thoracoscopic surgery and to identify the risk factors for initial placement failure. In total, 401 short hookwire placements for 401 lesions (mean diameter 9.3 mm) were reviewed. Technical success was defined as correct positioning of the hookwire. Possible risk factors for initial placement failure (i.e., requirement for placement of an additional hookwire or to abort the attempt) were evaluated using logistic regression analysis for all procedures, and for procedures performed via the conventional route separately. Of the 401 initial placements, 383 were successful and 18 failed. Short hookwires were finally placed for 399 of 401 lesions (99.5%). Univariate logistic regression analyses revealed that in all 401 procedures only the transfissural approach was a significant independent predictor of initial placement failure (odds ratio, OR, 15.326; 95% confidence interval, CI, 5.429-43.267; p < 0.001) and for the 374 procedures performed via the conventional route only lesion size was a significant independent predictor of failure (OR 0.793, 95% CI 0.631-0.996; p = 0.046). The technical success of preoperative short hookwire placement was extremely high. The transfissural approach was a predictor initial placement failure for all procedures and small lesion size was a predictor of initial placement failure for procedures performed via the conventional route. • Technical success of preoperative short hookwire placement was extremely high. • The transfissural approach was a significant independent predictor of initial placement failure for all procedures. • Small lesion size was a significant independent predictor of initial placement failure for procedures performed via the conventional route.

  18. Radiological evaluation of early gastric cancer: analysis of 104 cases

    International Nuclear Information System (INIS)

    Choi, Byung Ihn; Kim, Jae Hyung; Han, Man Chung

    1987-01-01

    During the two year period from January 1985 to December 1986, 161 cases were confirmed as early gastric cancer by pathologic mapping at Seoul National University Hospital. Among them, the authors reviewed 104 cases of early gastric cancer for the evaluation of diagnostic value of double contrast upper gastrointestinal series. Early gastric cancer was most common in 5th and 6th decade (64%) and male to female ratio was 2:1. Double contrast upper GI series could detect 97 out of 104 cases (93%). Among them, 62 cases were diagnosed as early gastric cancer, 32 as advanced gastric cancer and 3 as benign lesion. Detection rate according to the size was 100% in lesion larger than 2cm and 87% in lesion smaller than 2cm. Predictability of early gastric cancer according to size was 66% in lesion smaller than 3cm and 43% in lesion larger than 3cm. Detection rate according to the location of the tumor was almost similar between gastric body (94%) and antrum (93%), however was very low in anterior wall lesion (70%). Predictability of early gastric cancer was 69% in gastric body lesion, 52% in gastric antral lesion and 44% in greater curvature lesion. Detection rate according to the type of macrospecimen was 100% in type I, III and IIc+III. Type IIb showed the lowest detection rate (75%). Predictability of early gastric cancer was high in type IIc (68%) and low in type I (20%)

  19. Radiological Evaluation of Ambiguous Genitalia with Various Imaging Modalities

    Science.gov (United States)

    Ravi, N.; Bindushree, Kadakola

    2012-07-01

    Disorders of sex development (DSDs) are congenital conditions in which the development of chromosomal, gonadal, or anatomic sex is atypical. These can be classified broadly into four categories on the basis of gonadal histologic features: female pseudohermaphroditism (46,XX with two ovaries); male pseudohermaphroditism (46,XY with two testes); true hermaphroditism (ovotesticular DSD) (both ovarian and testicular tissues); and gonadal dysgenesis, either mixed (a testis and a streak gonad) or pure (bilateral streak gonads). Imaging plays an important role in demonstrating the anatomy and associated anomalies. Ultrasonography is the primary modality for demonstrating internal organs and magnetic resonance imaging is used as an adjunct modality to assess for internal gonads and genitalia. Early and appropriate gender assignment is necessary for healthy physical and psychologic development of children with ambiguous genitalia. Gender assignment can be facilitated with a team approach that involves a pediatric endocrinologist, geneticist, urologist, psychiatrist, social worker, neonatologist, nurse, and radiologist, allowing timely diagnosis and proper management. We describe case series on ambiguous genitalia presented to our department who were evaluated with multiple imaging modalities.

  20. Evaluation of the radiological protection in several departments of nuclear medicine

    International Nuclear Information System (INIS)

    Lopez Bejerano, G.; Jova Sed, L.

    2001-01-01

    For the evaluation of radiation protection, in several departments of nuclear medicine a survey was elaborated and applied that includes mainly: aspects of the licence and compliance with the requirements settled down in this, the program of individual radiological surveillance and their evaluation, functions that it completes the service of radiation protection, training program and the personnel's training, equipment and means of radiation protection, radiological surveillance program of the work areas, characteristics of the installation, radioactive waste management, quality assurance program, relative aspects to radiation protection in the procedures of diagnoses, as well as to pregnant patients and those related with the investigation of accidental medical exposures. The work makes a systematization and discussion of the state of compliance of the radiation protection requirements reflected in the International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources (BSS) and the main recommendations are exposed to achieve in these departments the optimization of the radiation protection. (author)

  1. May positron emission tomography reveal ectopic or active thymus in preoperative evaluation of non-thymomatous myasthenia gravis?

    Science.gov (United States)

    Mineo, Tommaso Claudio; Ambrogi, Vincenzo; Schillaci, Orazio

    2014-09-05

    In myasthenia gravis (MG) both native and ectopic thymic tissue containing germinal centers should show greater metabolism compared to adjacent tissues. We evaluated whether preoperative standardized uptake value (SUV) of 18fluoro-deoxy-glucose on Positron Emission Tomography (PET) might be increased and correlated with the presence of native or ectopic germinal centers. From 2005 to 2012 we performed extended thymectomy in 68 patients with non-thymomatous MG. All patients underwent PET-scan preoperatively and one-year postoperatively. SUVs were assessed in thymic and perithymic regions. Then it was matched with same-age, non-MG and non-neoplastic control group and finally correlated with presence of germinal centers in native thymus or in the ectopic tissue found in the surgical specimens. Mean SUV was significantly increased in MG patients compared to control group. Thymic SUV was significantly higher in presence of thymic germinal centers [3.5 (2.4-5.0) Vs 2.1 (1.4-2.5), p = 0.021] while perithymic SUV was significantly higher in presence of ectopic germinal centers [3.1 (2.7-3.5) Vs 1.3 (0.9-1.7), p = 0.001]. SUV was significantly correlated with MG score (rho = 0.289, p = 0.017) and marginally with antibodies anti-acetylcholine receptors (rho = 0.129, p = 0.05). At Kaplan Meier analysis, ectopic thymic tissue (p = 0.045) and ectopic germinal centers (p = 0.036) were significant predictors of complete stable remission, but preoperative dichotomized thymic (3.5 or more Vs less) (p = 0.083) and perithymic (2.1 or more Vs less) (p = 0.052) SUVs did not. Thymic and perithymic SUVs were significantly higher in patients with MG than non-MG and non-neoplastic patients. Thymic SUV was significantly correlated with the presence of germinal centers. Perithymic SUV resulted significantly correlated with the discovery of ectopic active thymic tissue. Neither thymic nor perithymic high SUVs predicted remission.

  2. Evaluation of radiological findings of complete gastric erosions

    International Nuclear Information System (INIS)

    Jung, Hyun Sub; Choi, See Sung; Lim, Yeo Sub; Kim, Byung Chan; Chung, Young Sun; Kim, Chang Guhn; Won, Jong Jin

    1987-01-01

    The double-contrast upper gastrointestinal (UGI) examination is an effective means of clearly demonstrating complete gastric erosions. The main radiographic feature of the complete gastric erosion is a small barium fleck surrounded by a radiolucent halo in the gastric mucosa. From Jan. 1984 to Dec. 1986 a total of 48 cases of complete gastric erosions was diagnosed by double-contrast UGI examinations, and then 12 cases among them underwent endoscopy within 6 days of UGI examination. For evaluation of the relationship of the diameters of radiolucent halos to the central barium flecks, the radiographic findings were reviewed. 1. 1) The male to female ratio was 20:28. The age of patients ranged from 15 to 76 years, and the most common age group was 6th decade. 2) The clinical symptoms included epigastralgia (63%), indigestion, hunger pain, and vomiting. 2. Thirteen coexistent diseases were found in 11 patients (22.9%): gastric ulcer in 4 patients, duodenal ulcer in 3, gastric cancer in 3, liver cirrhosis in 2, and hepatoma in one. 3. The gastric antrum was involved in all cases. The gastric body was also involved in 8 case, and duodenal bulb in 2 cases. 4. In all cases there were multiple complete erosions. The number of the erosions were 2 to 10 in 83.4% of cases. The radiographic findings of 330 complete erosions in the 48 cases were analyzed. 1) The diameters of surrounding halos varied from 3 to 11mm, and the sized of the central barium flecks from 0(No central barium fleck) to 5mm. The shapes of central barium flecks were round in 70.6% of complete erosions. 2) In general, the small central barium flecks had small surrounding halos, and the large ones large halos (correlation coefficient r=0.97). But with the enlargement of central barium flecks, the ratios of the diameters of surrounding halos to the size of central barium flecks tended to decrease by degrees. It appears that in the formation of a surrounding mucosal elevation (radiolucent halo) of a complete

  3. Evaluation of radiological findings of complete gastric erosions

    Energy Technology Data Exchange (ETDEWEB)

    Jung, Hyun Sub; Choi, See Sung; Lim, Yeo Sub; Kim, Byung Chan; Chung, Young Sun; Kim, Chang Guhn; Won, Jong Jin [College of Medicine, Wonkwang University, Iksan (Korea, Republic of)

    1987-06-15

    The double-contrast upper gastrointestinal (UGI) examination is an effective means of clearly demonstrating complete gastric erosions. The main radiographic feature of the complete gastric erosion is a small barium fleck surrounded by a radiolucent halo in the gastric mucosa. From Jan. 1984 to Dec. 1986 a total of 48 cases of complete gastric erosions was diagnosed by double-contrast UGI examinations, and then 12 cases among them underwent endoscopy within 6 days of UGI examination. For evaluation of the relationship of the diameters of radiolucent halos to the central barium flecks, the radiographic findings were reviewed. 1. 1) The male to female ratio was 20:28. The age of patients ranged from 15 to 76 years, and the most common age group was 6th decade. 2) The clinical symptoms included epigastralgia (63%), indigestion, hunger pain, and vomiting. 2. Thirteen coexistent diseases were found in 11 patients (22.9%): gastric ulcer in 4 patients, duodenal ulcer in 3, gastric cancer in 3, liver cirrhosis in 2, and hepatoma in one. 3. The gastric antrum was involved in all cases. The gastric body was also involved in 8 case, and duodenal bulb in 2 cases. 4. In all cases there were multiple complete erosions. The number of the erosions were 2 to 10 in 83.4% of cases. The radiographic findings of 330 complete erosions in the 48 cases were analyzed. 1) The diameters of surrounding halos varied from 3 to 11mm, and the sized of the central barium flecks from 0(No central barium fleck) to 5mm. The shapes of central barium flecks were round in 70.6% of complete erosions. 2) In general, the small central barium flecks had small surrounding halos, and the large ones large halos (correlation coefficient r=0.97). But with the enlargement of central barium flecks, the ratios of the diameters of surrounding halos to the size of central barium flecks tended to decrease by degrees. It appears that in the formation of a surrounding mucosal elevation (radiolucent halo) of a complete

  4. Investigation of evaluation method for marine radiological impact during an accident

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2013-08-15

    In 2012, JNES investigated the evaluation method, long-term seawater and marine deposition for release and diffusion to the ocean at the accident, and marine impact assessment code, in Japan and overseas. Also, the foreign regulations for marine radiological impact (direct release to ocean from the facilities and fallout on marine, etc.) were investigated. Furthermore, the index (e.g., intervention level) at emergency control in USA and Europe were investigated. (author)

  5. Investigation of evaluation method for marine radiological impact during an accident

    International Nuclear Information System (INIS)

    2013-01-01

    In 2012, JNES investigated the evaluation method, long-term seawater and marine deposition for release and diffusion to the ocean at the accident, and marine impact assessment code, in Japan and overseas. Also, the foreign regulations for marine radiological impact (direct release to ocean from the facilities and fallout on marine, etc.) were investigated. Furthermore, the index (e.g., intervention level) at emergency control in USA and Europe were investigated. (author)

  6. Multi-criteria analysis for evaluating the radiological and ecological safety measures in radioactive waste management

    International Nuclear Information System (INIS)

    Sazykina, T.G.; Kryshev, I.I.

    2006-01-01

    A methodological approach is presented for multicriterial evaluating the effectiveness of radiation ecological safety measures during radioactive waste management. The approach is based on multicriterial analysis with consideration of radiological, ecological, social, economical consequences of various safety measures. The application of the multicriterial approach is demonstrated taking as an example of decision-making on the most effective actions for rehabilitation of a water subject, contaminated with radionuclides [ru

  7. Diagnostic efficacy of a modified low-dose acquisition protocol for the preoperative evaluation of mini-implant sites

    Energy Technology Data Exchange (ETDEWEB)

    Tadinada, Aditya; Marczak, Alana; Yadav, Sumit [University of Connecticut School of Dental Medicine, Farmington (United States)

    2017-09-15

    The objective of this study was to compare the outcomes of surgical mini-implant placement when potential mini-implant sites were scanned using a lower-dose 180° acquisition protocol versus a conventional 360° acquisition protocol. Ten dentate human skulls were used to provide sites for potential mini-implant placement. The sites were randomly divided into 2 groups: 360° and 180° cone-beam computed tomography (CBCT) acquisition protocols. A small-volume 180° CBCT scan and a 360° CBCT scan of each site were acquired using a Morita Accuitomo-170 CBCT machine and then a mini-implant was placed. A follow-up 360° CBCT scan was done as a gold standard to evaluate the location of the mini-implant and root perforation. Two raters evaluated the scans. Ninety-eight percent of the mini-implants placed did not perforate any root structure. Two percent of the sites had an appearance suggestive of perforation. On a Likert scale, both raters agreed that their subjective evaluation of the diagnostic quality of the protocols, ability to make and read measurements of the sites, and preferences for the specified diagnostic task were comparable. The Cohen kappa showed high inter-rater and intra-rater agreement. In this ex vivo study, we found that the 180° rotational acquisition was as effective as the conventional 360° rotational acquisition for the preoperative evaluation of potential mini-implant sites.

  8. Annual evaluation of routine radiological survey/monitoring frequencies for the High Ranking Facilities Deactivating Project at Oak Ridge, Tennessee

    International Nuclear Information System (INIS)

    1998-12-01

    The Bethel Valley Watershed at the Oak Ridge National Laboratory (ORNL) has several Environmental Management (EM) facilities that are designated for deactivation and subsequent decontamination and decommissioning (D and D). The Surplus Facilities Program at ORNL provides surveillance and maintenance support for these facilities as deactivation objectives are completed to reduce the risks associated with radioactive material inventories, etc. The Bechtel Jacobs Company LLC Radiological Control (RADCON) Program has established requirements for radiological monitoring and surveying radiological conditions in these facilities. These requirements include an annual evaluation of routine radiation survey and monitoring frequencies. Radiological survey/monitoring frequencies were evaluated for two High Ranking Facilities Deactivation Project facilities, the Bulk Shielding Facility and Tower Shielding Facility. Considerable progress has been made toward accomplishing deactivation objectives, thus the routine radiological survey/monitoring frequencies are being reduced for 1999. This report identifies the survey/monitoring frequency adjustments and provides justification that the applicable RADCON Program requirements are also satisfied

  9. American College of Radiology Accreditation Program for mammographic screening sites: Physical evaluation criteria

    International Nuclear Information System (INIS)

    Hendrick, R.E.; Haus, A.G.; Hubbard, L.B.; Lasky, H.J.; McCrohan, J.; McLelland, R.; Rothenberg, L.N.; Tanner, R.L.; Zinninger, M.D.

    1987-01-01

    The American College of Radiology has initiated a program for the accreditation of mammographic screening sites, which includes evaluation by mail of image quality and average glandular breast dose. Image quality is evaluated by use of a specially designed phantom (a modified RMI 152D Mammographic Phantom) containing simulated microcalcifications, fibrils and masses. Average glandular dose to a simulated 4.5-cm-thick (50% glandular, 50% fat) compressed breast is evaluated by thermoluminescent dosimeter measurements of entrance exposure and half value layer. Standards for acceptable image quality and patient doses are presented and preliminary results of the accreditation program are discussed

  10. Text Simplification Using Consumer Health Vocabulary to Generate Patient-Centered Radiology Reporting: Translation and Evaluation.

    Science.gov (United States)

    Qenam, Basel; Kim, Tae Youn; Carroll, Mark J; Hogarth, Michael

    2017-12-18

    Radiology reporting is a clinically oriented form of documentation that reflects critical information for patients about their health care processes. Realizing its importance, many medical institutions have started providing radiology reports in patient portals. The gain, however, can be limited because of medical language barriers, which require a way for customizing these reports for patients. The open-access, collaborative consumer health vocabulary (CHV) is a terminology system created for such purposes and can be the basis of lexical simplification processes for clinical notes. The aim of this study was to examine the comprehensibility and suitability of CHV in simplifying radiology reports for consumers. This was done by characterizing the content coverage and the lexical similarity between the terms in the reports and the CHV-preferred terms. The overall procedure was divided into the following two main stages: (1) translation and (2) evaluation. The translation process involved using MetaMap to link terms in the reports to CHV concepts. This is followed by replacing the terms with CHV-preferred terms using the concept names and sources table (MRCONSO) in the Unified Medical Language System (UMLS) Metathesaurus. In the second stage, medical terms in the reports and general terms that are used to describe medical phenomena were selected and evaluated by comparing the words in the original reports with the translated ones. The evaluation includes measuring the content coverage, investigating lexical similarity, and finding trends in missing concepts. Of the 792 terms selected from the radiology reports, 695 of them could be mapped directly to CHV concepts, indicating a content coverage of 88.5%. A total of 51 of the concepts (53%, 51/97) that could not be mapped are names of human anatomical structures and regions, followed by 28 anatomical descriptions and pathological variations (29%, 28/97). In addition, 12 radiology techniques and projections represented

  11. Preoperative evaluation of the artery of adamkiewicz by MR angiography and CT angiography in patients with a thoracic aortic aneurysm

    International Nuclear Information System (INIS)

    Niinuma, Hiroyuki; Ohira, Atsushi; Makita, Shinji; Moriai, Yoshiteru; Hiramori, Katsuhiko; Yoshioka, Kunihiro; Nakajima, Takayuki; Kawazoe, Kohei

    2002-01-01

    Paraplegia is known as an extremely serious and important complication of surgical repair in patients with a thoraco-abdominal aortic aneurysm. It is important to evaluate the artery of Adamkiewicz (AdA) before surgical repair to prevent paraplegia. But the AdA is difficult to visualize by the invasive and hazardous, conventional selective angiography. The aim of this study was to visualize AdA by MR angiography (MRA) and CT angiography (CTA). Twenty-one consecutive patients with a thoracic aortic aneurysm underwent both gadolinium-enhanced, three-dimensional MRA and CTA using multislice helical CT. The AdA was successfully visualized in 15 of the 21 patients (71.4%) by MRA, and in 17 of those 21 patients (80.9%) by CTA. Its continuity was depicted in 12 of 15 patients (80%) by MRA, and in 9 of 17 patients (47%) by CTA. AdA was visualized at 85.7% by MRA or CTA, respectively. This study shows that CTA is a much more sensitive method to detect AdA than MRA. On the other hand, MRA is better to evaluate the continuity of AdA from the descending aorta to the anterior spinal artery, than CTA. Therefore, MRA and CTA are both useful for a preoperative evaluation of AdA and its detailed vascular anatomy from the aorta to the anterior spinal artery. (author)

  12. Case-oriented computer-based-training in radiology: concept, implementation and evaluation

    Science.gov (United States)

    Dugas, Martin; Trumm, Christoph; Stäbler, Axel; Pander, Ernst; Hundt, Walter; Scheidler, Jurgen; Brüning, Roland; Helmberger, Thomas; Waggershauser, Tobias; Matzko, Matthias; Reiser, Maximillian

    2001-01-01

    Background Providing high-quality clinical cases is important for teaching radiology. We developed, implemented and evaluated a program for a university hospital to support this task. Methods The system was built with Intranet technology and connected to the Picture Archiving and Communications System (PACS). It contains cases for every user group from students to attendants and is structured according to the ACR-code (American College of Radiology) [2]. Each department member was given an individual account, could gather his teaching cases and put the completed cases into the common database. Results During 18 months 583 cases containing 4136 images involving all radiological techniques were compiled and 350 cases put into the common case repository. Workflow integration as well as individual interest influenced the personal efforts to participate but an increasing number of cases and minor modifications of the program improved user acceptance continuously. 101 students went through an evaluation which showed a high level of acceptance and a special interest in elaborate documentation. Conclusion Electronic access to reference cases for all department members anytime anywhere is feasible. Critical success factors are workflow integration, reliability, efficient retrieval strategies and incentives for case authoring. PMID:11686856

  13. Case-oriented computer-based-training in radiology: concept, implementation and evaluation

    Directory of Open Access Journals (Sweden)

    Helmberger Thomas

    2001-10-01

    Full Text Available Abstract Background Providing high-quality clinical cases is important for teaching radiology. We developed, implemented and evaluated a program for a university hospital to support this task. Methods The system was built with Intranet technology and connected to the Picture Archiving and Communications System (PACS. It contains cases for every user group from students to attendants and is structured according to the ACR-code (American College of Radiology 2. Each department member was given an individual account, could gather his teaching cases and put the completed cases into the common database. Results During 18 months 583 cases containing 4136 images involving all radiological techniques were compiled and 350 cases put into the common case repository. Workflow integration as well as individual interest influenced the personal efforts to participate but an increasing number of cases and minor modifications of the program improved user acceptance continuously. 101 students went through an evaluation which showed a high level of acceptance and a special interest in elaborate documentation. Conclusion Electronic access to reference cases for all department members anytime anywhere is feasible. Critical success factors are workflow integration, reliability, efficient retrieval strategies and incentives for case authoring.

  14. Independent auto evaluation of an operative radiological protection program; Autoevaluacion independiente de un programa de proteccion radiologica operativa

    Energy Technology Data Exchange (ETDEWEB)

    Medrano L, M.A.; Rodriguez C, C.C.; Linares R, D.; Zarate M, N.; Zempoalteca B, R. [Gerencia Subsede Sureste Instituto Nacional de Investigaciones Nucleares, 52045 Ocoyoacac, Estado de Mexico (Mexico)]. e-mail: maam@nuclear.inin.mx

    2006-07-01

    The program of operative radiological protection of a nuclear power plant consists of multiple procedures and associate tasks that have as purpose the radiological protection of the workers of the power station. It is for this reason that the constant evaluation of the one it programs it is an important tool in the identification of their weaknesses (and strengths), so they can be assisted appropriately. In this work the main elements of the program of independent auto evaluation of the program of operative radiological protection of the Laguna Verde Central that has been developed and implemented by the National Institute of Nuclear Research are described. (Author)

  15. The clinical and radiological evaluation of absence of the corpus callosum

    International Nuclear Information System (INIS)

    Byrd, S.E.; Radkowski, M.A.; McLone, D.G.; Northwestern Univ., Chicago, IL; Flannery, A.

    1990-01-01

    A retrospective and prospective analysis of children with a diagnosis of complete absence of the corpus callosum (ACC) at the Children's Memorial Hospital in Chicago over a 5-year period was performed. The diagnosis was based on the computed tomography (CT) and/or magnetic resonance (MR) images. From this material, 105 children with a diagnosis of ACC were analyzed on the basis of clinical symptomatology and radiological studies (CT, MR and ultrasound). Eighty-three percent of our children were symptomatic. The most common symptoms and signs were macrocephaly with hydrocephalus and seizures. MR was the best radiological imaging modality for evaluating children with ACC and associated brain anomalies. The most common associated brain anomalies with ACC in decreasing frequency in our children were: interhemispheric cyst with hydrocephalus, Dandy-Walker malformation, migrational disorders, absence of the inferior vermis, cephaloceles and lipoma aof the interhemispheric fissure. (author). 15 refs.; 8 figs.; 2 tabs

  16. Determination and evaluation of the radiological situation using mobile measurements during the ground phase

    Energy Technology Data Exchange (ETDEWEB)

    Obrecht, R.; Pohl, H.; Schneider, S.; Grimm, C. [Umweltministerium Baden-Wuerttemberg, Stuttgart (Germany); Neff, Ulrich; Coutinho, Paula; Mueller, Ulrich; Mandel, Carmen [Landesanstalt fuer Umweltschutz, Messungen und Naturschutz Baden-Wuerttemberg, Karlsruhe (Germany); Wilbois, Thomas; Ren, Yongxiang [T-Systems GEI GmbH, Ulm (Germany); Chaves, Fernando [Fraunhofer Inst. IITB, Karlsruhe (Germany)

    2009-08-15

    The nuclear reactor remote monitoring system of the state of Baden-Wuerttemberg (Kernreaktor-Fernueberwachung Baden-Wuerttemberg - KFUeBW) is implemented according to the recently renewed ''recommendations for remote monitoring of nuclear power plants''. In Baden-Wuerttemberg, the application area of the system covers both, the surveillance of internal procedures on one hand, and the handling of incidents or accidents on the other. The following paper shows the role of the KFUeregarding the determination and evaluation of the radiological situation in the range of off-site emergency response. Progress is reported on the measurement conception and the technical possibilities for the investigation of the radiological situation after the end of the deposition of radio nuclides (ground phase). (orig.)

  17. Preoperative evaluation of malignancy of glioma by thallium-201 SPECT, proton MRS and 18F-fluorodeoxy-glucose PET

    International Nuclear Information System (INIS)

    Ito, Tamio; Nakagawara, Jyoji; Sasaki, Takehiko; Nakamura, Hirohiko; Tsukamoto, Eriko

    2005-01-01

    We studied preoperative malignancy evaluation of glioma by thallium-201 SPECT (T1-SPECT), proton MRS (MRS) and 18F-fluorodeoxy-glucose PET (FDG-PET). Twenty-seven patients with astrocytic tumors (diffuse astrocytoma (A): 8, anaplastic astrocytoma (AA): 10, glioblastoma (GB): 9) were retrospectively studied. FDG-PET was assessed as the visual metabolic grading scale (MG Scale) in 9 cases. The Tl index was expressed as the count rate of the tumor site to the count rate over the contralateral normal region in 25 cases. MRS was evaluated as the metabolite ratios of choline/creatine (Cho/Cr) and Cho/N-acetylaspartate (NAA), and as the presence of lactate and lipid metabolites in 23 cases. As the malignancy grade of the glioma rises, so too did the MG Scale of FDG-PET and Tl index (PET MG Scale (A: Grade (Gr). 1; 2 cases, Gr.2; 2 cases, AA: Gr.1; 1 case, Gr.2; 1 case, GB: Gr.2; 2 cases, Gr.3; 1 case), Tl index: A:129±0.22, AA: 1.97±0.44, GB: 342±1.38). Metabolite ratios of Cho/Cr and Cho/NAA in the high-grade gliomas were higher than those in the low-grade gliomas, however, those of GB were lower than those of AA, maybe due to difficulty in the spectroscopic voxel selection (Cho/Cr: A:1.86, AA: 2.96, GB: 2.73, Cho/NAA: A: 2.90, AA: 6.37, GB: 5.57). Both lactate and lipids presented in the high-grade glioma cases. Proliferative potential as measured by MIB-1 index mostly correlated with the Tl index significantly (p=0.0002). We were able to evaluate the malignancy grade of gliomas preoperatively by using FDG-PET, Tl-SPECT and MRS, however, we also need to understand the pitfalls of each of these examinations respectively (author)

  18. Evaluation of the Internet precence of diagnostic radiology units at German universities

    International Nuclear Information System (INIS)

    Seitz, J.; Siegmund, M.; Voelk, M.; Feuerbach, S.; Strotzer, M.

    2002-01-01

    Purpose. Analyzing the availability and the contents of the internet homepages of the radiological departments of German universities.Material and method. In June and July 2001 the internet homepages of 36 radiological departments of German universities were evaluated in a study. A medical student experienced in using the world wide web examined the websites concerning the following criteria: research, teaching, informations for patients, clinical topics and general information. Additionally an evaluation of the technical standard of the presentation was performed.Results. 31 of the 36 radiological departments presented a homepage in the world wide web. The subject research was presented by 29 institutes. Also 29 departments provided information concerning teaching in their presentations. In 24 cases informations especially for patients were given. In all topics there is a huge variety of the quality and quantity of the provided information throughout the different institutions. 21 homepages available without restriction during the study period; 3 were nearly completely under construction. Multimedia techniques were only used in 2 homepages. The structural hierarchy of the webpages was in the average only two or three levels. Only 6 providers presented an additional version of their homepage in english.Conclusion. In the moment the possibility of internet-presentation is sub-optimal used by the responsible persons of the radiological institutions. The main emphasis is on research and teaching. There is nearly no use of multimedial elements in the presentations. Only a minority of the homepages can be read by international viewers because of the lack of an english version of the pages. (orig.) [de

  19. Scintigraphic and MR perfusion imaging in preoperative evaluation for lung volume reduction surgery. Pilot study results

    International Nuclear Information System (INIS)

    Johkoh, Takeshi; Mueller, N.L.; Kavanagh, P.V

    2000-01-01

    To compare MR perfusion imaging with perfusion scintigraphy in the evaluation of patients with pulmonary emphysema being considered for lung volume reduction surgery. Six patients with pulmonary emphysema and two normal individuals were evaluated by MR perfusion imaging, perfusion scintigraphy, and selective bilateral pulmonary angiography. MR images were obtained with an enhanced fast gradient recalled echo with three-dimensional Fourier transformation technique (efgre 3D) (6.3/1.3; flip angle, 30 deg C; field of view, 45-48 cm; matrix, 256 x 160). The presence or absence of perfusion defects in each segment was evaluated by two independent observers. Using angiography as the gold standard, the sensitivity, specificity, and accuracy of MR perfusion imaging in detecting focal perfusion abnormalities were 90%, 87%, and 89%, respectively, while those of perfusion scintigraphy were 71%, 76%, and 71%, respectively. The diagnostic accuracy of MR perfusion imaging was significantly higher than that of scintigraphy (p<0.001, McNemar test). There was good agreement between two observers for MR perfusion imaging (kappa statistic, 0.66) and only moderate agreement for perfusion scintigraphy (kappa statistic, 0.51). MR perfusion imaging is superior to perfusion scintigraphy in the evaluation of pulmonary parenchymal perfusion in patients with pulmonary emphysema. (author)

  20. Preoperative and postoperative evaluation of vascular diseases by 111In-oxine platelet scintigraphy

    International Nuclear Information System (INIS)

    Nishibe, Toshiya; Hiraoka, Tomoya; Sakuma, Makoto; Sakai, Keisuke; Yasuda, Keishu; Tanabe, Tatsuzo; Nagao, Kazuhiko; Ito, Kazuo

    1991-01-01

    111 In-oxine platelet scintigraphy was performed on 20 patients with various vascular diseases to assess its clinical usefulness as a diagnostic procedure. Especially we evaluated its usefulness for thrombus formation after Ivaron sponge occlusion method (ISO method) and endotheliazation of prosthetic grafts. Negative image in thoracic false lumen was obtained 2 or 3 weeks after operation in all patients whose dissection was completely repaired by ISO method. It suggested early thromboexclusion in thoracic false lumen in which Ivalon sponge was implanted. Negative image was observed in two cases of saphenous vein graft and one of Dacron graft. The case of Dacron graft was examined 415 days after implantation. Negative result in this case would be accounted for by stabilized fibrin layer or good endothelial coverrage. The results suggest that 111 In-oxine platelet scintigraphy is an appropriate technique for evaluating the encapsulation of prosthetic grafts and thromboexclusion after ISO method. (author)

  1. Current radiology. Volume 5

    International Nuclear Information System (INIS)

    Wilson, G.H.; Hanafee, W.N.

    1984-01-01

    This book contains 10 selections. They are: Nuclear Magnetic Resonance Imaging, Interventional Vascular Radiology, Genitourinary Radiology, Skeletal Radiology, Digital Subtraction Angiography, Neuroradiology, Computed Tomographic Evaluation of Degenerative Diseases of the Lumbar Spine, The Lung, Otolaringology and Opthalmology, and Pediatric Radiology: Cranial, Facial, Cervical, Vertebral, and Appendicular

  2. Avaliação pré-operatória na cirurgia de catarata Preoperative evaluation and cataract surgery

    Directory of Open Access Journals (Sweden)

    Fernando Sabia Tallo

    2007-08-01

    Full Text Available OBJETIVO: Analisar a relevância da avaliação pré-operatória na prevenção de eventos clínicos adversos per e pós-operatórios na cirurgia de catarata. MÉTODOS: Foram incluídos no estudo 1.254 pacientes submetidos à cirurgia de catarata no Instituto da Catarata do Departamento Oftalmologia UNIFESP-EPM, no período de jan-dez 2004. Dados referentes à avaliação pré-operatória e à ocorrência de eventos clínicos adversos relacionados ao procedimento anestésico/cirúrgico foram retrospectivamente coletados. RESULTADOS: Dezesseis pacientes (1,2% apresentaram evento clínico adverso. Novecentos e trinta e seis pacientes (74,6% apresentaram pelo menos um exame alterado, porém este fator não mostrou associação com a ocorrência de evento clínico adverso (p=0,334. CONCLUSÃO: Na série estudada a alteração de exames laboratoriais, eletrocardiograma e/ou radiografia de tórax não se correlacionou com a ocorrência de eventos clínicos adversos relacionados ao procedimento anestésico/cirúrgico.PURPOSE: Analysis of the relevance of preoperative evaluation to prevent adverse clinical events, pre- and postoperative, on cataract surgery. METHODS: The study includes 1254 patients submitted to cataract surgery at the Instituto da Catarata do Departamento de Oftalmologia da UNIFESP - EPM, in the period of Jan - Dec 2004. Data referring to the preoperative evaluation and adverse clinical events related to anesthesia/surgical procedure were retrospectively collected. RESULTS: Sixteen patients (1.2% showed an adverse clinical event. Nine hundred thirty-six patients (74.6% showed at least one altered examination. This factor, nevertheless, did not show any relation to the adverse clinical event (p=0.334. CONCLUSION: Concerning the studied series, the altered laboratory tests, electrocardiogram and/or thorax x-ray has no correlation with the adverse clinical events related to the anesthesia/surgical procedure.

  3. Pre-operative evaluation of cleft palate using three dimensional computerized tomography (s-D CT)

    International Nuclear Information System (INIS)

    Azia, A.; Hashmi, R.

    1999-01-01

    Cleft palate is a congenital anomaly with major development concerns. Surgery with bone grafting is often required to correct the lesion. With the introduction of 3-D CT the evaluation of cleft pa late has become more accurate. We present two cases of cleft palate, which were operated upon with bone grafting. We employed 3-D CT techniques in addition to the conventional 2-D CT, 3-D CT improves the estimation of the required bone graft and signification reduces length of surgery and complications. (author)

  4. Evaluating two-dimensional skeletal structure parameters using radiological bone morphometric analysis

    International Nuclear Information System (INIS)

    Asa, Kensuke; Sakurai, Takashi; Kashima, Isamu; Kumasaka, Satsuki

    2005-01-01

    The objectives of this study was to investigate the reliability of two-dimensional (2D) skeletal structure parameters obtained using radiological bone morphometric analysis. The 2D skeletal parameters in the regions of interest (ROIs) were measured on computed radiography (CR) images of first phalanges from racehorses, using radiological bone morphometric analysis. Cancellous bone blocks were made from the phalanges in the same position as the ROI determined on CR images. Three-dimensional (3D) trabecular parameters were measured using micro-computed tomography (μCT). The correlations between the 2D skeletal parameters and 3D trabecular parameters were evaluated in relation to the measured bone strength. The following 2D skeletal structure parameters were correlated with bone strength (r=0.61-0.69): skeletal perimeter (Sk.Pm), skeletal number (Sk.N), skeletal separation (Sk.Sp), skeletal spacing (Sk.Spac), fractal dimension (FD), and skeletal pattern factor (SkPf). The 3D trabecular structure parameters were closely correlated with bone strength (r=0.74-0.86). The 2D skeletal parameters Sk.N, Sk.Pm, FD, SkPf, and Sk.Spac were correlated with the 3D trabecular parameters (r=0.61-0.70). The 2D skeletal parameters obtained using radiological bone morphometric analysis may be useful indicators of trabecular strength. (author)

  5. Potential release scenario and radiological consequence evaluation of mineral resources at WIPP

    International Nuclear Information System (INIS)

    Little, M.S.

    1982-05-01

    This report has reviewed certain of the natural resources which may be found at the site of the nuclear waste repository being considered for southeastern New Mexico, and discussed the scenarios which have been used to estimate the radiological consequences from the mining of these resources several hundred years after the radioactive waste has been emplaced. It has been concluded that the radiological consequences of the mining of potash or hydrocarbons (mostly natural gas) are probably bounded by the consequences of hydrologic breach scenarios already considered by the US Department of Energy, and by reports of EEG. These studies conclude that the resultant doses would not constitute a significant threat to public health. This report also evaluates the radiological consequences of solution mining of halite at the WIPP site. Although such mining in the Delaware Basin and particularly at the WIPP site, is not likely at the present time, significant economic, social or climatic changes a few hundred years after emplacement may make these resources more attractive. The DOE did not consider such mining at the site credible

  6. Usefulness of an accelerated transoesophageal stress echocardiography in the preoperative evaluation of high risk severely obese subjects awaiting bariatric surgery

    Directory of Open Access Journals (Sweden)

    Tessier Michel

    2010-07-01

    Full Text Available Abstract Background Severe obesity is associated with an increased risk of coronary artery disease (CAD. Bariatric surgery is an effective procedure for long term weight management as well as reduction of comorbidities. Preoperative evaluation of cardiac operative risk may often be necessary but unfortunately standard imaging techniques are often suboptimal in these subjects. The purpose of this study was to demonstrate the feasibility, safety and utility of transesophageal dobutamine stress echocardiography (TE-DSE using an adapted accelerated dobutamine infusion protocol in severely obese subjects with comorbidities being evaluated for bariatric surgery for assessing the presence of myocardial ischemia. Methods Subjects with severe obesity [body mass index (BMI >40 kg/m2] with known or suspected CAD and being evaluated for bariatric surgery were recruited. Results Twenty subjects (9M/11F, aged 50 ± 8 years (mean ± SD, weighing 141 ± 21 kg and with a BMI of 50 ± 5 kg/m2 were enrolled in the study and underwent a TE-DSE. The accelerated dobutamine infusion protocol used was well tolerated. Eighteen (90% subjects reached their target heart rate with a mean intubation time of 13 ± 4 minutes. Mean dobutamine dose was 31.5 ± 9.9 ug/kg/min while mean atropine dose was 0.5 ± 0.3 mg. TE-DSE was well tolerated by all subjects without complications including no significant arrhythmia, hypotension or reduction in blood arterial saturation. Two subjects had abnormal TE-DSE suggestive of myocardial ischemia. All patients underwent bariatric surgery with no documented cardiovascular complications. Conclusions TE-DSE using an accelerated infusion protocol is a safe and well tolerated imaging technique for the evaluation of suspected myocardial ischemia and cardiac operative risk in severely obese patients awaiting bariatric surgery. Moreover, the absence of myocardial ischemia on TE-DSE correlates well with a low operative risk of cardiac event.

  7. Analysis of 64-row multidetector CT images for preoperative angiographic evaluation of potential living kidney donors; Analyse der mehrphasigen 64-Zeilen-Multidetektor-Computertomographie zur praeoperativen angiographischen Evaluation potenzieller Lebendnierenspender

    Energy Technology Data Exchange (ETDEWEB)

    Blondin, D.; Andersen, K.; Kroepil, P.; Cohnen, M.; Moedder, U.; Jung, G. [Universitaetsklinikum Duesseldorf, Institut fuer Diagnostische Radiologie, Duesseldorf (Germany); Sandmann, W. [Universitaetsklinikum Duesseldorf, Klinik fuer Gefaesschirurgie und Nierentransplantation, Duesseldorf (Germany); Ivens, K. [Universitaetsklinikum Duesseldorf, Klinik fuer Nephrologie, Duesseldorf (Germany)

    2008-07-15

    Anatomical imaging and the ascertainment of any anomalies in the renal vessels and the ureters are essential in the planning of a kidney donation. The aim of the present study was to assess the value of 64-row multidetector CT in noninvasive examination of the renal vessels and ureters of potential living kidney donors. The evaluation embraced 63 living renal donors (LNS) who underwent preoperative CT examination from December 2004 to January 2007. The examinations were all carried out using a Somatom Sensation -Cardiac 64 (Siemens Medical Solutions, Germany). As well as CT angiography (CTA), a venous phase of the abdomen and a late phase after 15 min using low-dose technique were performed for CT urography (CTU). The radiological findings were compared with the surgical results, or with the angiograms in 2 cases. Sensitivity, specificity and both negative and positive predictive value were calculated. In the 63 (31 female, 32 male) donors CTA had a sensitivity of 100% in examination of the main and accessory renal arteries and of 98.3% when the venous and ureteric anatomy were assessed. The sensitivity of low-dose CTU was also 100%. The findings recorded in this study indicate that noninvasive preoperative planning with 64-row multidetector CTA and CTU is a reliable 'one-stop shopping' method of examination for potential living kidney donors. (orig.) [German] Die anatomische Darstellung und Erfassung moeglicher Anomalien der Nierengefaesse und Ureteren ist fuer die Planung einer Lebendnierenspende von essenzieller Bedeutung. Die vorliegende Untersuchung soll die Wertigkeit der nichtinvasiven Evaluation mit der 64-Zeilen-Multidetektor-CT untersuchen. In die Auswertung wurden 63 Lebendnierenspender (LNS) eingeschlossen, die im Zeitraum 12.2004 bis 01.2007 mit der CT praeoperativ untersucht wurden. Die Untersuchungen erfolgten mit einem Somatom-Sensation-Cardiac-64 (Siemens Medical Solutions, Deutschland). Neben einer CT-Angiographie (CTA) wurden eine

  8. Preparation, Conduct and Evaluation of Exercises to Test Preparedness for a Nuclear or Radiological Emergency

    International Nuclear Information System (INIS)

    2010-01-01

    The aim of this publication is to serve as a practical tool for the preparation, conduct and evaluation of exercises to test preparedness for response to a nuclear or radiological emergency. It fulfils in part the functions assigned to the IAEA under Article 5.a(ii) of the Convention on Assistance in Case of a Nuclear Accident or Radiological Emergency (Assistance Convention), namely, to collect and disseminate to States Parties and Member States information concerning the methodologies, techniques and available results of research on such emergencies. To ensure effective response to radiation emergencies when needed, provisions should be made for regular training of emergency response personnel. As stated in Preparedness and Response for a Nuclear or Radiological Emergency (Safety Requirements, Safety Standard Series No. GS-R-2), 'The operator and the response organizations shall make arrangements for the selection of personnel and training to ensure that the personnel have the requisite knowledge, skills, abilities, equipment, procedures and other arrangements to perform their assigned response functions'. A further requirement is that 'Exercise programmes shall be conducted to ensure that all specified functions required to be performed for emergency response and all organizational interfaces for facilities in threat category I, II or III and the national level programmes for threat category IV or V are tested at suitable intervals'. In 2004 the IAEA General Conference, in resolution GC(48)/RES/10 encouraged Member States to 'implement the Safety Requirements for Preparedness and Response to a Nuclear or Radiological Emergency'. This document is published as part of the IAEA Emergency Preparedness and Response Series to assist in meeting these requirements and to fulfil Article 5 of the Assistance Convention. It was developed based on a number of assumptions about national and local capabilities. Therefore, the exercise structure, terms and scenarios must be

  9. The radiological risks associated with the thorium fuelled HTGR fuel cycle. A comparative risk evaluation

    International Nuclear Information System (INIS)

    Dodd, D.H.; Hienen, J.F.A. van.

    1995-10-01

    This report presents the results of task B.3 of the 'Technology Assessment of the High Temperature Reactor' project. The objective of task B.3 was to evaluate the radiological risks to the general public associated with the sustainable HTGR cycle. Since the technologies to be used at several stages of this fuel cycle are still in the design phase and since a detailed specification of this fuel cycle has not yet been developed, the emphasis was on obtaining a global impression of the risk associated with a generic thorium-based HTGR fuel cycle. This impression was obtained by performing a comparative risk analysis on the basis of data given in the literature. As reference for the comparison a generic uranium fuelled LWR cycle was used. The major benefit with respect to the radiological rsiks of basing the fuel cycle around modular HTGR technology instead of the LWR technology is the increase in reactor safety. The design of the modular HTGR is expected to prevent the release of a significant amount of radioactive material to the environment, and hence early deaths in the surrounding population, during accident conditions. This implies that there is no group risk as defined in the Dutch risk management policy. The major benefit of thorium based fuel cycles over uranium based fuel cycles is the reduction in the radiological risks from unraium mining and milling. The other stages of the nuclear fuel cycle which make a significant contribution to the radiological risks are electricity generation, reprocessing and final disposal. The risks associated with the electricity generation stage are dominated by the risks from fission products, activated corrosion products and the activation products tritium and carbon-14. The risks associated with the reprocessing stage are determined by fission and activation products (including actinides). (orig./WL)

  10. The radiological risks associated with the thorium fuelled HTGR fuel cycle. A comparative risk evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Dodd, D.H.; Hienen, J.F.A. van

    1995-10-01

    This report presents the results of task B.3 of the `Technology Assessment of the High Temperature Reactor` project. The objective of task B.3 was to evaluate the radiological risks to the general public associated with the sustainable HTGR cycle. Since the technologies to be used at several stages of this fuel cycle are still in the design phase and since a detailed specification of this fuel cycle has not yet been developed, the emphasis was on obtaining a global impression of the risk associated with a generic thorium-based HTGR fuel cycle. This impression was obtained by performing a comparative risk analysis on the basis of data given in the literature. As reference for the comparison a generic uranium fuelled LWR cycle was used. The major benefit with respect to the radiological rsiks of basing the fuel cycle around modular HTGR technology instead of the LWR technology is the increase in reactor safety. The design of the modular HTGR is expected to prevent the release of a significant amount of radioactive material to the environment, and hence early deaths in the surrounding population, during accident conditions. This implies that there is no group risk as defined in the Dutch risk management policy. The major benefit of thorium based fuel cycles over uranium based fuel cycles is the reduction in the radiological risks from unraium mining and milling. The other stages of the nuclear fuel cycle which make a significant contribution to the radiological risks are electricity generation, reprocessing and final disposal. The risks associated with the electricity generation stage are dominated by the risks from fission products, activated corrosion products and the activation products tritium and carbon-14. The risks associated with the reprocessing stage are determined by fission and activation products (including actinides). (orig./WL).

  11. Evaluation of radiology personnel practice of Mazandaran University of Medical Sciences

    International Nuclear Information System (INIS)

    Rahimi, S.A.

    2007-01-01

    Complete text of publication follows. Background and purpose: Radiology department that provides images with proper quality plays a vital role in diagnosis of diseases. Good image is obtained by proper technical criteria and correct Positioning. Personnel practice of radiology department has a principal role on radiographs quality. This study was carried out to determine the radiology department personnel practice in university hospitals. Method and Material: Data collection was made using an observational check list. Its validity and reliability was determined previously. The sample size of which was thirty-nine persons. 29 items of practice related to technical and protect ional aspects at three working shifts were observed and recorded separately. Results: Results showed that most of the personnel were female (61.5%), over 40 years old (59%) and technicians (53.8%). On the whole, personnel's score percentages in technical field on three shifts of morning evening and night were 47.5%, 46.2%, and 45.9%, respectively which were less than them in protect ional field (60.3%, 56A% and 55.8%, respectively). Comparison of technical protection and total scores related to individual variables showed significant difference only in organizational grades (p<0.0001, p<0.05, p<0.0001, respectively) Le. The mean scores of radiological technologists holding BSc and associate degrees were more than those of technologists not holding university degrees. Conclusion: The quality of the personnel practice is not desirable; therefore continuing education programmers are needed for personnel. Protection against radiation exposure, availability of equipment and continuous evaluation of use of equipment can be effective in dose reduction in patients.

  12. Preoperative evaluation of neurovascular relationships for microvascular decompression in the cerebellopontine angle in a virtual reality environment.

    Science.gov (United States)

    Du, Zhuo-Ying; Gao, Xiang; Zhang, Xiao-Luo; Wang, Zhi-Qiu; Tang, Wei-Jun

    2010-09-01

    In this paper the authors' goal was to evaluate the feasibility and efficacy of a virtual reality (VR) system in preoperative planning for microvascular decompression (MVD) procedures treating idiopathic trigeminal neuralgia and hemifacial spasm. The system's role in surgical simulation and training was also assessed. Between May 2008 and April 2009, the authors used the Dextroscope system to visualize the neurovascular complex and simulate MVD in the cerebellopontine angle in a VR environment in 16 patients (6 patients had trigeminal neuralgia and 10 had hemifacial spasm). Reconstructions were carried out 2-3 days before MVD. Images were printed in a red-blue stereoscopic format for teaching and discussion and were brought into the operating room to be compared with real-time intraoperative findings. The VR environment was a powerful aid for spatial understanding of the neurovascular relationship in MVD for operating surgeons and trainees. Through an initial series of comparison/confirmation experiences, the senior neurosurgeon became accustomed to the system. He could predict intraoperative problems and simulate surgical maneuvering, which increased his confidence in performing the procedure. The Dextroscope system is an easy and rapid method to create a stereoscopic neurovascular model for MVD that is highly concordant with intraoperative findings. It effectively shortens the learning curve and adds to the surgeon's confidence.

  13. Experiences from the evaluation of two global quality indicators in a radiology service

    International Nuclear Information System (INIS)

    Hernandez Lopez, L. Y.; Valdes Arce, Y.; Fleitas Estevez, I.

    2013-01-01

    The main objective in radiology is to obtain images of good quality for certain diagnosis, without unnecessarily irradiating the patient. This paper shows the results of the reject films and clinical image quality evaluations in the radiology service of the Hospital 'Abel Santamaria Cuadrado', Pinar del Rio, Cuba. Data were collected during March and September of 2012. Reject films analysis was done for conventional and mammography studies. Clinical image quality evaluated following the European Guidelines on Quality Criteria. The results show that reject films rate decreased from 6% on March to 1.3% on September, after applying corrective actions; while chests studies have the highest reject rate. The mean causes for rejections were maladjustments in the collimation system, equipment faults, sub exposure and overexposure. For mammography studies the initial reject rate was 29.3% and decreased to 5.9% on September. Mean causes for rejection were related to faults in the automatic processor and the mammography x-ray unit. Image quality also improved: only 48.3% of chest images and 10% of mammography images were considered to be acceptable for diagnosis at the first moment; while these percentages increased to 68.3% and 70% for chest and mammography studies, respectively in the September's evaluation. The study demonstrated that the frequently evaluation of the quality's indicators allows to identify the main causes of the image's detriment to propose corrective actions. Still in situations of insufficient resources it is possible to improve quality with simple interventions on the main faults detected. (Author)

  14. Evaluation of the radiological risk resulting from road transportation of tritiated water

    International Nuclear Information System (INIS)

    Menossi, C.A.; Segado, R.; Reyes, R.

    1983-01-01

    A probability model for the evaluation of the individual radiological risk resulting from road transportation of tritiated water in 200-liter drums is presented. In order to evaluate such risk, an evaluation must be made of the probability for an individual to be involved in the consequences of a radiological transport accident, to incur a given dose and to suffer deleterious effects resulting from the dose incurred. With the purpose of quantifying the importance of accidents, a severity level classification was adopted as a function of the fraction of liquid volume spilled as a result of the accident. Considering the above-mentioned severity classification and the transported volume, the volume and the spill area are implied, while the soil characteristics are taken into account. By evaluating the spill characteristics, the average meteorological conditions in the area under analysis and the activity concentration of the transported liquid, the activity concentration values for tritium in air may be estimated, thus allowing calculation of the effective dose equivalent to be incurred by the individual who is most exposed to the consequences of an associated event. As a result of the summarized analysis above, a value of the individual risk per unit of activity concentration is obtained for tritium and for a given volume of transported liquid. 8 references

  15. Preoperative assessment of lung cancer patients: evaluating guideline compliance (re-audit).

    Science.gov (United States)

    Jayia, Parminderjit Kaur; Mishra, Pankaj Kumar; Shah, Raajul R; Panayiotou, Andrew; Yiu, Patrick; Luckraz, Heyman

    2015-03-01

    Guidelines have been issued for the management of lung cancer patients in the United Kingdom. However, compliance with these national guidelines varies in different thoracic units in the country. We set out to evaluate our thoracic surgery practice and compliance with the national guidelines. An initial audit in 2011 showed deficiencies in practice, thus another audit was conducted to check for improvements in guideline compliance. A retrospective study was carried out over a 12-month period from January 2013 to January 2014 and included all patients who underwent radical surgical resection for lung cancer. Data were collected from computerized records. Sixty-eight patients had radical surgery for lung cancer between January 2013 and January 2014. Four patients were excluded from the analysis due to incomplete records. Our results showed improvements in our practice compared to our initial audit. More patients underwent surgery within 4 weeks of computed tomography and positron-emission tomography scanning. An improvement was noticed in carbon monoxide transfer factor measurements. Areas for improvement include measurement of carbon monoxide transfer factor in all patients, a cardiology referral in patients at risk of cardiac complications, and the use of a global risk stratification model such as Thoracoscore. Guideline-directed service delivery provision for lung cancer patients leads to improved outcomes. Our results show improvement in our practice compared to our initial audit. We aim to liaise with other thoracic surgery units to get feedback about their practice and any audits regarding adherence to the British Thoracic Society and National Institute for Health and Care Excellence guidelines. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  16. Use of 18F-FDG PET/CT in the preoperative evaluation of patients diagnosed with peritoneal carcinomatosis of ovarian origin, candidates to cytoreduction and hipec. A pending issue

    International Nuclear Information System (INIS)

    Lopez-Lopez, V.; Cascales-Campos, P.A.; Gil, J.; Frutos, L.; Andrade, R.J.; Fuster-Quiñonero, M.; Feliciangeli, E.; Gil, E.; Parrilla, P.

    2016-01-01

    Highlights: • CT showed the better results confirming ovarian peritoneal disease than 18 F-FDG PET/CT. • CT and 18 F-FDG PET/CT present a low detection capability for LSS-3 injury. • Main utility of 18 F-FDG PET/CT is the evaluation of extraperitoneal extension. - Abstract: Purpose: To evaluate the clinical usefulness of the results obtained with 18 F-FDG PET/CT in relation to CT in the preoperative staging of patients with peritoneal carcinomatosis secondary to primary or recurrent ovarian cancer candidates to cytoreductive surgery and hyperthermic intraoperative intraperitoneal chemotherapy (HIPEC). Material and methods: A retrospective study comparing the results obtained with CT and 18 F-FDG PET/CT in the preoperative evaluation of a series of 59 patients was performed. In all patients the peritoneal carcinomatosis index (PCI) was determined by preoperative radiological CT and 18F-FDG PET/CT and compared with surgical PCI, which was considered as reference. Results: Of the 59 patients studied, in 55 peritoneal carcinomatosis presences were confirmed (4 patients had complete responses to neoadjuvant chemotherapy). The mean surgical, CT and 18F-FDG PET/CT PCI was 9.46 ± 7.70, 3.69 ± 3.96 and 2.25 ± 1.02, respectively. In the global disease detection, CT showed a higher positive likelihood ratio (LR+) than 18 F-FDG PET/CT (15.3, 95% CI 8.35–28.04 vs. 3.47, 95% CI 3.36–5.11) and a lower negative likelihood ratio (LR-) than 18F-FDG PET/CT (0.67, 95% CI 0.61–0.73 vs. 0.82, 95% CI 0.76–0.88). In every region of the abdomen the CT showed a greater LR+ than 18F-FDG PET/CT and a lower LR- than 18F-FDG PET/CT. Conclusions: CT showed the best diagnostic results compared to 18 F-FDG PET/CT to confirme the presence of peritoneal disease. The lower performance of the 18 F-FDG PET/CT suggests that the main utility of 18 F-FDG PET/CT is to evaluate a possible metastatic extraperitoneal spread of the disease.

  17. A pilot study to evaluate the use of virtual lectures for undergraduate radiology teaching

    Energy Technology Data Exchange (ETDEWEB)

    Sendra-Portero, Francisco, E-mail: sendra@uma.es [Departamento de Radiología y Medicina Física, Facultad de Medicina, Universidad de Málaga, Boulevar Louis Pasteur, 32, 29071 Málaga (Spain); Torales-Chaparro, Oscar E., E-mail: oetjft@terra.es [Departamento de Radiología y Medicina Física, Facultad de Medicina, Universidad de Málaga, Boulevar Louis Pasteur, 32, 29071 Málaga (Spain); Ruiz-Gómez, Miguel J., E-mail: mjrg@uma.es [Departamento de Radiología y Medicina Física, Facultad de Medicina, Universidad de Málaga, Boulevar Louis Pasteur, 32, 29071 Málaga (Spain); Martínez-Morillo, Manuel, E-mail: mmorillo@uma.es [Departamento de Radiología y Medicina Física, Facultad de Medicina, Universidad de Málaga, Boulevar Louis Pasteur, 32, 29071 Málaga (Spain)

    2013-05-15

    Purpose: To demonstrate that virtual lectures can substitute conventional lectures in radiology education for medical students. Methods and materials: During the course 2005–2006, 89 out from 191 (46.6%) third year students of a subject entitled “General Radiology”, participated voluntarily in a pilot study including 22 virtual lectures (Flash presentations translated from the same PowerPoint presentations of conventional lectures, adding recorded narration and navigation tools). Participants (P) studied by means of virtual lectures, while non-participants (NP) assisted to conventional lectures. The results of the final oral exam classified from 0 to 3, and a 60-questions evaluation on image interpretation were used to compare both groups after training. Finally, 34 students from the group P (38.2%) fulfilled a 10-points scale quality survey about the project. Results: Final exam qualifications were significantly higher for P than for NP (2.11 ± 0.85 versus 1.73 ± 1.04) as well as the number of correct answers of the evaluation on image interpretation (24.2 ± 6.2 versus 21.2 ± 5.4), but differences could obey to different attitudes between both groups. The usefulness of virtual lectures to learn General Radiology obtained the highest global scoring (8.82 ± 1.00). Contents were generally better evaluated than the design of the presentations. Conclusion: Virtual lectures can substitute conventional lectures in radiology education for medical students with no detriment to students’ learning. Their potential advantage is that magisterial lectures can be used to discuss contents with students in a more participative way if virtual lectures are provided before.

  18. A pilot study to evaluate the use of virtual lectures for undergraduate radiology teaching

    International Nuclear Information System (INIS)

    Sendra-Portero, Francisco; Torales-Chaparro, Oscar E.; Ruiz-Gómez, Miguel J.; Martínez-Morillo, Manuel

    2013-01-01

    Purpose: To demonstrate that virtual lectures can substitute conventional lectures in radiology education for medical students. Methods and materials: During the course 2005–2006, 89 out from 191 (46.6%) third year students of a subject entitled “General Radiology”, participated voluntarily in a pilot study including 22 virtual lectures (Flash presentations translated from the same PowerPoint presentations of conventional lectures, adding recorded narration and navigation tools). Participants (P) studied by means of virtual lectures, while non-participants (NP) assisted to conventional lectures. The results of the final oral exam classified from 0 to 3, and a 60-questions evaluation on image interpretation were used to compare both groups after training. Finally, 34 students from the group P (38.2%) fulfilled a 10-points scale quality survey about the project. Results: Final exam qualifications were significantly higher for P than for NP (2.11 ± 0.85 versus 1.73 ± 1.04) as well as the number of correct answers of the evaluation on image interpretation (24.2 ± 6.2 versus 21.2 ± 5.4), but differences could obey to different attitudes between both groups. The usefulness of virtual lectures to learn General Radiology obtained the highest global scoring (8.82 ± 1.00). Contents were generally better evaluated than the design of the presentations. Conclusion: Virtual lectures can substitute conventional lectures in radiology education for medical students with no detriment to students’ learning. Their potential advantage is that magisterial lectures can be used to discuss contents with students in a more participative way if virtual lectures are provided before

  19. Cushing's disease: diagnostic evaluation, therapeutics and prognostic

    International Nuclear Information System (INIS)

    Pereira, M.A.A.; Jugue, S.M.; Moura, O.M.D.; Gross, K.; Halpern, A.; Nicolau, W.; Liberman, B.; Bloise, W.; Mendonca, B.; Cabral, N.D.; Marino Junior, R.; Wajchenberg, B.L.

    1992-01-01

    Aspects as clinical, diagnosis, laboratory tests and radiological evaluations concerning Cushing's disease are analysed in 56 patients. Several options of non medicamental therapy are presented. The relationship between preoperative data (hormonal and radiological information), postoperative findings and hypophyseal adenomectomy is discussed. (M.A.C.)

  20. The radiological evaluation of a prototype posting-in hatch under conditions of high alpha activity

    International Nuclear Information System (INIS)

    Smith, D.I.; Hollick, R.C.

    1987-07-01

    A prototype posting-in hatch, mounted vertically in the top panel of a highly active glovebox has been radiologically evaluated in the Fuels Laboratory, AEEW. This simple, air-lock type system of 100 mm diameter has pneumatically operated and interlocked lids and a low velocity, inward purge, supplied by the glovebox depression. The hatch proved extremely reliable and very easy to operate. More than 1200 simulated posting movements were carried out and a > 8 order of magnitude reduction in aerosol concentration was recorded from the active glovebox to the monitoring environment. (author)

  1. Preoperative Quantitative MR Tractography Compared with Visual Tract Evaluation in Patients with Neuropathologically Confirmed Gliomas Grades II and III: A Prospective Cohort Study

    International Nuclear Information System (INIS)

    Delgado, Anna F.; Nilsson, Markus; Latini, Francesco; Mårtensson, Johanna; Zetterling, Maria; Berntsson, Shala G.; Alafuzoff, Irina; Lätt, Jimmy; Larsson, Elna-Marie

    2016-01-01

    Background and Purpose. Low-grade gliomas show infiltrative growth in white matter tracts. Diffusion tensor tractography can noninvasively assess white matter tracts. The aim was to preoperatively assess tumor growth in white matter tracts using quantitative MR tractography (3T). The hypothesis was that suspected infiltrated tracts would have altered diffusional properties in infiltrated tract segments compared to noninfiltrated tracts. Materials and Methods. Forty-eight patients with suspected low-grade glioma were included after written informed consent and underwent preoperative diffusion tensor imaging in this prospective review-board approved study. Major white matter tracts in both hemispheres were tracked, segmented, and visually assessed for tumor involvement in thirty-four patients with gliomas grade II or III (astrocytomas or oligodendrogliomas) on postoperative neuropathological evaluation. Relative fractional anisotropy (rFA) and mean diffusivity (rMD) in tract segments were calculated and compared with visual evaluation and neuropathological diagnosis. Results. Tract segment infiltration on visual evaluation was associated with a lower rFA and high rMD in a majority of evaluated tract segments (89% and 78%, resp.). Grade II and grade III gliomas had similar infiltrating behavior. Conclusion. Quantitative MR tractography corresponds to visual evaluation of suspected tract infiltration. It may be useful for an objective preoperative evaluation of tract segment involvement

  2. An evaluation of clinical, radiological and three-dimensional dental tomography findings in ectodermal dysplasia cases.

    Science.gov (United States)

    Doğan, Mehmet-Sinan; Callea, Michele; Yavuz, Ìzzet; Aksoy, Orhan; Clarich, Gabriella; Günay, Ayse; Günay, Ahmet; Güven, Sedat; Maglione, Michele; Akkuş, Zeki

    2015-05-01

    This study aimed to review the results related to head and jaw disorders in cases of ectodermal dysplasia. The evaluation of ectodermal dysplasia cases was made by clinical examination and examination of the jaw and facial areas radiologically and on cone-beam 3-dimensional dental tomography (CBCT) images. In the 36 cases evaluated in the study, typical clinical findings of pure hypohidrotic ectodermal displasia (HED) were seen, such as missing teeth, dry skin, hair and nail disorders. CBCT images were obtained from 12 of the 36 cases, aged 1.5- 45 years, and orthodontic analyses were made on these images. The clinical and radiological evaluations determined, hypodontia or oligodontia, breathing problems, sweating problems, a history of fever, sparse hair, saddle nose, skin peeling, hypopigmentation, hyperpigmentation, finger and nail deformities, conical teeth anomalies, abnormal tooth root formation, tooth resorption in the root, gingivitis, history of epilepsy, absent lachrymal canals and vision problems in the cases which included to the study. Ectodermal dysplasia cases have a particular place in dentistry and require a professional, multi-disciplinary approach in respect of the chewing function, orthognathic problems, growth, oral and dental health. It has been understood that with data obtained from modern technologies such as three-dimensional dental tomography and the treatments applied, the quality of life of these cases can be improved.

  3. Use of (18)F-FDG PET/CT in the preoperative evaluation of patients diagnosed with peritoneal carcinomatosis of ovarian origin, candidates to cytoreduction and hipec. A pending issue.

    Science.gov (United States)

    Lopez-Lopez, V; Cascales-Campos, P A; Gil, J; Frutos, L; Andrade, R J; Fuster-Quiñonero, M; Feliciangeli, E; Gil, E; Parrilla, P

    2016-10-01

    To evaluate the clinical usefulness of the results obtained with (18)F-FDG PET/CT in relation to CT in the preoperative staging of patients with peritoneal carcinomatosis secondary to primary or recurrent ovarian cancer candidates to cytoreductive surgery and hyperthermic intraoperative intraperitoneal chemotherapy (HIPEC). A retrospective study comparing the results obtained with CT and (18)F-FDG PET/CT in the preoperative evaluation of a series of 59 patients was performed. In all patients the peritoneal carcinomatosis index (PCI) was determined by preoperative radiological CT and 18F-FDG PET/CT and compared with surgical PCI, which was considered as reference. Of the 59 patients studied, in 55 peritoneal carcinomatosis presences were confirmed (4 patients had complete responses to neoadjuvant chemotherapy). The mean surgical, CT and 18F-FDG PET/CT PCI was 9.46±7.70, 3.69±3.96 and 2.25±1.02, respectively. In the global disease detection, CT showed a higher positive likelihood ratio (LR+) than (18)F-FDG PET/CT (15.3, 95% CI 8.35-28.04 vs. 3.47, 95% CI 3.36-5.11) and a lower negative likelihood ratio (LR-) than 18F-FDG PET/CT (0.67, 95% CI 0.61-0.73 vs. 0.82, 95% CI 0.76-0.88). In every region of the abdomen the CT showed a greater LR+ than 18F-FDG PET/CT and a lower LR- than 18F-FDG PET/CT. CT showed the best diagnostic results compared to (18)F-FDG PET/CT to confirme the presence of peritoneal disease. The lower performance of the (18)F-FDG PET/CT suggests that the main utility of (18)F-FDG PET/CT is to evaluate a possible metastatic extraperitoneal spread of the disease. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  4. Designing an educational software for teaching and evaluation of radiology course in dentistry

    Directory of Open Access Journals (Sweden)

    Fatemeh Ezoddini Ardakani

    2009-08-01

    Full Text Available Background and purpose: Radiology course has different parts in dentistry curriculum in Iranian medical universities. The third part of this course involves the diagnosis of facial and jaw’s bone lesions. In this study an educational software was designed, by using Access Database Software, to teach this course to dentistry students and after one semester the efficacy of it was tested by examining the students’ opinion about it.Methods: In this study the radiology course part 3 was thought to the 32 students in 2 parts. In the first part (before mid-semester the traditional method of teaching and in the second part (after the mid-semester exam the designed software was used for teaching and evaluating the students. After each semester the opinion of the students about the course was examined by using a standard questionnaire. The students in the first and second part of the semester were considered as the control and case group respectively.Results: Most of the students (90.6% believe that the software is useful in education and helps them to learn the subject. In addition, 84.4% of students believe that the soft ware can evaluate the clinical skills of students in detecting the radiological lesions and that the program can save their studying time. Overall, the students’ marks in case group were significantly higher than these in control group. The overall satisfaction of 78.1% of students about this program was good while 9.3% did not have a good feeling about it and 12.5% did not express any opinion.Conclusion: This study shows the importance of using computer for educational purposes especially in the courses with a huge amount of materials to be memorized by students. Computer science can help students in memorizing different signs and symptoms of many disorders. In addition it can help the teachers to evaluate the students at the end of the course.Key words: Computer, Software, Education, Radiology, Dentistry.

  5. Background radon levels in Germany and how to take them into account in radiological evaluations

    International Nuclear Information System (INIS)

    Gehrcke, K.; Kuemmel, M.; Dushe, C.

    2008-01-01

    A mean background radon level of 9 ±, 1 Bq/m 3 was determined for Germany as a whole. This value is lower by about 5 Bq/m3 compared to previous, less representative measurements. For 17 former mining areas in the east of Germany representative regional background levels were derived. Characteristic limits (decision thresholds and detection limits) were determined for these areas to facilitate statistically sound decisions in the radiological evaluation of mining legacies. The detection limits for the anthropogenic contribution to the radon concentration vary from 10 to more than 20 Bq/m 3 in the different mining areas. Especially the higher values are governed by the spatial and temporal variability of the background concentrations rather than measurement uncertainties. The fact that man-made contributions of partly more than 20 Bq/m3 cannot be detected with sufficient statistical accuracy has to be taken into account in radiological investigations and evaluations of mining legacies. (author)(tk)

  6. Radiological safety evaluation for a Waste Transfer Facility at Savannah River Site

    International Nuclear Information System (INIS)

    Ades, M.J.

    1993-01-01

    This paper provides a review of the radiological safety evaluation performed for a Waste Transfer Facility (WTF) located at the Savannah River Site (SRS). This facility transfers liquid radioactive waste between various waste processing facilities and waste storage facilities. The WTF includes functional components such as the diversion box and the pump pits, waste transfer lines, and the outside yard service piping and electrical services. The WSRC methodology is used to evaluate the consequences of postulated accidents that result in the release of radioactive material. Such accidents include transfer line breaks, underground liquid pathway release, fire in pump tank cells and HEPA filters, accidents due to natural phenomena, and externally induced events. Chemical hazards accidents are not considered. The analysis results indicate that the calculated mean onsite and offsite radiological consequences are bounded by the corresponding WSRC dose limits for each accident considered. Moreover, the results show that the maximum onsite and offsite doses calculated for the WTF are lower than the maximum doses determined for the whole radioactive waste facility where the WTF is located

  7. Evaluation of radiological protection and dose of skin entrance in paediatric dentistry examinations

    International Nuclear Information System (INIS)

    Khoury, Helen Jamil; Silveira, Marcia Maria Fonseca da; Couto, Geraldo Bosco Lindoso; Brasileiro, Izabela Vanderley

    2005-01-01

    In this work the radiological protection conditions and dose at the entrance of pediatric patients undergoing dental intraoral radiographs were evaluated. The study was conducted in two clinics of the dentistry course at the Federal University of Pernambuco, Recife, PB, Brazil, equipped with conventional X-ray apparatus, with 60 and 70 kV. 254 exams of 113 patients between the ages of 3 to 12 years were evaluated. The skin entrance dose was estimated using TLD-100 thermoluminescent dosemeters. During the examination were also recorded information regarding the time of exposure, radiographic technique used, use of thyroid protectors and lead apron, angle and distance of the cone Locator to the patient's skin. The results showed that the input skin doses ranged from 0.3 mGy to 10mGy. The lead apron was used in 71% of exams while the thyroid shield was only used in 58% of the exams. The exposure times ranged from 0,5s to 1,5s. From the results it can be concluded that the radiological procedures are not optimized and that in some cases the patient dose is high.

  8. Evaluation of the radiologic potential due to the nuclear submarine visits to the Rio de Janeiro port

    International Nuclear Information System (INIS)

    Pereira, Jose Francisco

    2004-01-01

    Brazil is signatory of international protocols related to the visit of nuclear-powered vessels, aircraft carriers and submarines to Brazilian ports. The submarines, during their stay in Brazilian ports, inform that there is no release of radioactive material to the environment. However, the possibility of occurrence of accidents with environmental releases from PWR reactors is real. Between 1993 and 2003, 13 nuclear submarines visited Brazilian ports. This work aimed to evaluate the potential impact due to the visits of nuclear-powered ships and submarines to the port of the city of Rio de Janeiro, in relation to releases of radioactive materials to the environment, considering both routine releases and accidental situations. The models selected to perform the assessments took into account the scenarios to be simulated. Simple, but conservative methodologies were used for the evaluation of routine releases. For accidental releases, the dynamics of the materials dispersion into the environment were considered. The present study was mainly focalized on the initial phase of an accident. The doses for the crew of the Brazilian navy ships, for IRD teams performing environmental monitoring, and for the population around the Guanabara Bay, close to the points of anchorage, were assessed. The results indicated that, in normal operational conditions, no significant radiological impact due to the visit of nuclear submarines to the port of the city of Rio de Janeiro is expected, even considering the occurrence of small routine radionuclide releases. The analysis of accidental releases, however, indicated that the submarines should be located at a minimum distance of 2,5 km from inhabited areas in the coast of the Guanabara Bay. The need for environmental control and training of the teams involved in the attendance of the submarines, during the period of their visit, was also considered. The need for revising the procedures for the preoperational surveys to be performed at the

  9. An in vivo evaluation of the change in the pulpal oxygen saturation after administration of preoperative anxiolytics and local anesthesia

    Directory of Open Access Journals (Sweden)

    Krishna P. Shetty

    2016-03-01

    Full Text Available Background. Given the influence of systemic blood pressure on pulpal blood flow, anxiolytics prescribed may alter the pulpal blood flow along with the local anesthetic solution containing a vasoconstrictor. This study evaluated the impact of preoperative anxiolytics and vasoconstrictors in local anesthetic agents on pulpal oxygen saturation. Methods. Thirty anxious young healthy individuals with a mean age of 24 years were randomly selected using the Corah’s Dental Anxiety Scale (DAS. After checking the vital signs the initial pulpal oxygen saturation (initial SpO2 was measured using a pulse oximeter. Oral midzolam was administered at a dose of 7.5 mg. After 30 min, the vital signs were monitored and the pulpal oxygen saturation (anxiolytic SpO2 was measured. A total of 1.5 mL of 2% lidocaine with 1:200000 epinephrine was administered as buccal infiltration anesthesia and 10 min the final pulpal oxygen saturation (L.A SpO2 was measured. Results. The mean initial (SpO2 was 96.37% which significantly decreased to 90.76% (SpO2 after the administration of the anxiolytic agent. This drop was later accentuated to 85.17% (SpO2 after administration of local anesthetic solution. Statistical significance was set at P<0.0001. Conclusion. High concentrations of irritants may permeate dentin due to a considerable decrease in the pulpal blood flow from crown or cavity preparation. Therefore, maintaining optimal blood flow during restorative procedures may prevent pulpal injury.

  10. Dose and risk evaluation to the thyroid gland in intra-oral dental radiology

    International Nuclear Information System (INIS)

    Souza, Edmilson M.; Lima, Marco A.F.; Kelecom, Alphonse; Correa, Samanda C.A.; Silva, Ademir X.; Brito, Alan

    2008-01-01

    Intra-oral technique is one of the most frequently used procedures of dental radiology, allowing the detection of a variety of dental anomalies such as caries, dental trauma and periodontal lesions, while exposing patients to relatively low doses of radiation. However, although the adverse effects of doses generated by dental radiology are essentially stochastic, a number of epidemiological studies have provided evidence of an increased risk of thyroid tumors for dental radiography. Many studies have measured doses of radiation for dental radiography, but only a few have estimated thyroid dose. Furthermore, most of the studies on dose evaluation in dental radiology are based on standardized calculation phantoms, which neglect the variance of the patient size or even sex. The purpose of this study is to use the Monte Carlo code MCNPX and the FAX (Female Adult voXel) and MAX (Male Adult voXel) phantoms to investigate how absorbed doses to the thyroid gland in intraoral dental examinations vary in female and male patients. The lifetime cancer incidence attributable to dental examinations were estimated using the Biological Effects of Ionizing Radiations (BEIR) VII Committee Report. The phantoms study proved a useful trial for detecting the radiation dose to the thyroid gland and conclusively supported that the anatomy may be regarded as an influencing factor in radiation dose received during dental examination. Finally, the results have also confirmed that the association of the MCNPX code and the MAX and FAX phantoms is very useful in dosimetric studies on radiographic examinations of female and male patients. (author)

  11. Cost-benefit evaluation of systematic radiological diagnosis of congenital dislocated hip

    International Nuclear Information System (INIS)

    Faure, C.; Schmit, P.; Salvat, D.

    1984-01-01

    The interest of radiological mass screening of congential dislocated hip is still debated. We have tried to evaluate the cost-benefit ratio of radiological detection at the age of 3-4 months, taking into account the socio-economic cost and radiation risk. Assuming a frequency of this disorder of 1% the average cost of treatment of one case detected by X-ray screening at the age of 3-4 months, including the price of X-ray examinations of 99 normal babies is 23.374 FF. The average cost of treatment of a case detected at walking-age, i.e. after 9 months, is 84.230 FF. The cost-benefit ratio is 3.6. In countries where the frequency reaches 2% the cost benefit ratio is 4.57. It also appears from our study that the irradiation of the patient is much smaller when the diagnosis is made earlier. Comparing the slight irradiation delivered to normal infants by this mass screening to the heavy irradiation received by a few individuals whose treatment is started after 9 months, the calculated risk of leukemia or of genetic disorder for the whole population still favours a systematic X-ray film of the pelvis at age 3-4 months. However, if it were decided to make obligatory this mass radiological detection programme during the fourth month of life, this would necessitate a serious effort to train all radiologists to obtain adequate films with the best radiation protection. (orig.)

  12. Evaluation of patient radiation doses using DAP meter in interventional radiology procedures

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Byung Sam [Dept. of Radiological Technology. Shingu University, Sungnam (Korea, Republic of); Yoon, Yong Su [Dept. of Health Sciences, Graduate School of Medical Sciences, Kyushu Univeristy, Kyushu (Japan)

    2017-03-15

    The author investigated interventional radiology patient doses in several other countries, assessed accuracy of DAP meters embedded in intervention equipment in domestic country, conducted measurement of patient doses for 13 major interventional procedures with use of Dose Area Product(DAP) meters from 23 hospitals in Korea, and referred to 8,415 cases of domestic data related to interventional procedures by radiation exposure after evaluation the actual effective of dose reduction variables through phantom test. Finally, dose reference level for major interventional procedures was suggested. In this study, guidelines for patient doses were 237.7 Gy·cm{sup 2} in TACE, 17.3 Gy·cm{sup 2} in AVF, 114.1 Gy·cm{sup 2} in LE PTA and STENT, 188.5 Gy·cm{sup 2} in TFCA, 383.5 Gy·cm{sup 2} in Aneurysm Coil, 64.6 Gy·cm{sup 2} in PTBD, 64.6 Gy·cm{sup 2} in Biliary Stent, 22.4 Gy·cm{sup 2} in PCN, 4.3 Gy·cm{sup 2} in Hickman, 2.8 Gy·cm{sup 2} in Chemo-port, 4.4 Gy·cm{sup 2} in Perm-Cather, 17.1 Gy·cm{sup 2} in PCD, and 357.9 Gy·cm{sup 2} in Vis, EMB. Dose reference level acquired in this study is considered to be able to use as minimal guidelines for reducing patient dose in the interventional radiology procedures. For the changes and advances of materials and development of equipment and procedures in the interventional radiology procedures, further studies and monitoring are needed on dose reference level Korean DAP dose conversion factor for the domestic procedures.

  13. Evaluation of the initial and final radiological status of a nuclear facility in sanitation status

    International Nuclear Information System (INIS)

    Granier, Guy; Aubonnet, Emilie; Courbet, Christele; Desnoyers, Yvon; Dubot, Didier; Fichet, Pascal; Nokhamzon, Jean-Guy; Ollivier Dehaye, Catherine; Pillette-Cousin, Lucien; Mahe, Charly

    2017-02-01

    This technical report is a guideline for radiological assessment of a nuclear facility in remediation stages. From initial state of remediation to final status survey it describes the best suited statistical or geostatistical approach for the characterization of sites contaminated by radionuclides. Prior to any characterization campaign an historical analysis coupled with a function analysis targeted investigations is fundamental to obtain a robust overview. The evaluation of the amount of radioactive material present in a defined area requires a sampling strategy correlated with characterization objective. On the other hand correlation between remediation objectives and characterization objectives also requires knowing acceptable level of risk. This give better inputs to allow available resources and take into account environmental constraints. In particular, radiological characterization of infrastructures is one of the key step to conduct industrial project of decommissioning nuclear facilities in remediation. It needs a reliable initial diagnosis to obtain an efficient waste management with a financial control Optimization of the production of nuclear waste. It is an important part of Setting the Off Final - Dismantling). This approach is compatible with French Regulation (Guide 14 ASN) for the first and second line of defence. Annexes provide feedback of experimentation of this methodology. This report supplements the methodological guide published by the GT10 CETAMA entitled 'Soil Radiological Characterisation Methodology' (CEA-R 6386). The latter is intended for project managers and covers all issues related to the characterization projects for soil. This guideline concern specifically design engineers in charge of implementation program at the different stages of investigation and data processing. Similarly, the proposed methodology can be broken for the characterization of chemical pollution and process equipment. (authors)

  14. Application of 3-Dimensional Printing in a Case of Osteogenesis Imperfecta for Patient Education, Anatomic Understanding, Preoperative Planning, and Intraoperative Evaluation.

    Science.gov (United States)

    Eisenmenger, Laura B; Wiggins, Richard H; Fults, Daniel W; Huo, Eugene J

    2017-11-01

    The techniques and applications of 3-dimensional (3D) printing have progressed at a fast pace. In the last 10 years, there has been significant progress in applying this technology to medical applications. We present a case of osteogenesis imperfecta in which treatment was aided by prospectively using patient-specific, anatomically accurate 3D prints of the calvaria. The patient-specific, anatomically accurate 3D prints were used in the clinic and in the operating room to augment patient education, improve surgical decision making, and enhance preoperative planning. A 41-year-old woman with osteogenesis imperfecta and an extensive neurosurgical history presented for cranioplasty revision. Computed tomography (CT) data obtained as part of routine preoperative imaging were processed into a 3D model. The 3D patient-specific models were used in the clinic for patient education and in the operating room for preoperative visualization, planning, and intraoperative evaluation of anatomy. The patient reported the 3D models improved her understanding and comfort with the planned surgery when compared with discussing the procedure with the neurosurgeon or viewing the CT images with a neuroradiologist. The neurosurgeon reported an improved understanding of the patient's anatomy and potential cause of patient symptoms as well as improved preoperative planning compared with viewing the CT imaging alone. The neurosurgeon also reported an improvement in the planned surgical approach with a better intraoperative visualization and confirmation of the regions of planned calvarial resection. The use of patient-specific, anatomically accurate 3D prints may improve patient education, surgeon understanding and visualization, preoperative decision making, and intraoperative management. Copyright © 2017 Elsevier Inc. All rights reserved.

  15. Evaluation of skin entry kerma in radiological examinations at the Hospital de Clinicas, Parana, Brazil

    International Nuclear Information System (INIS)

    Porto, Lorena E.; Schelin, Hugo R.; Santos, Amanda C. dos; Bunick, Ana Paula; Paschuk, Sergei; Denyak, Valeriy; Tilly Junior, Joao G.; Khoury, Helen J.

    2011-01-01

    This paper evaluates the skin entry dose of pediatric and adults patients when submitted to radiological examinations at the Hospital de Clinicas do Parana, Brazil, as part integrate of the data assessment of International Atomic Energy Agency (IAEA) for Latin America. It was performed measurements of dose for evaluation of skin entry kerma in pediatric patients in thorax AP/PA examinations, adults of thorax in AP/PA, cranio caudal mammography and median lateral and patients of computerized tomography in examination of head, thorax and abdomen. The obtained data demonstrate the necessity of verification of diagnostic analysis standards. The great value amplitudes demonstrate the incompatibility of examination executions with those recommended by the literature. The dose values presented partially inside the range recommended and the other over the expected for the due examination when compared with the literature

  16. RASCAL 4.l: evaluation system for the analysis of the radiological consequences

    International Nuclear Information System (INIS)

    Miguel, I. de; Gomez-Arguello, B.

    2012-01-01

    Recently the Spanish Nuclear Safety Council (CSN) has promoted the replacement of the code used in the Spanish Nuclear Power Plants to estimate potential and actual doses due to atmospheric releases. IRDAM Code (interactive Rapid Dose Assessment Model, 1983) by RASCAL Code version 4.1 (Radiological Assessment System for consequence Analysis). This code was developed by the NRC (Nuclear Regulatory Commission) to evaluate releases from nuclear power plants, spent fuel storage pools and casks, fuel cycle facilities and radioactive material handling facilities. RASCAL was officially requested to the Spanish nuclear power plants in February 1st, 2012, and it can be used for external dose assessment and to evaluate the recommended protective action for the public in a specific situation (sheltering, prophylaxis, evacuation, etc.). (Author)

  17. The First Report on Evaluating the Thoracic Radiology of the Medical Institutions for Pneumoconiosis in Korea

    International Nuclear Information System (INIS)

    Lee, Won Jeong; Chu, Sang Deok; Park, So Young; Choi, Byung Soon; Park, Jai Soung; Kim, Sung Jin; Ko, Kyung Sun

    2010-01-01

    The pnuemoconiotic findings on chest radiograph for pneumoconiosis are affected by the technique, the equipment and the reading environment. We report here on the results of evaluating the thoracic radiology of the Medical Institutions for Pneumoconiosis (MIPs). For the first time, we visited the MIPs to evaluate the thoracic radiography that is used to treat patients with pneumoconiotic complications, and this included evaluating the equipment and the technical parameters for thoracic radiography, the computed tomography, the education for quality assurance health care and the reading environment. We used the guideline published by the Occupational Safety and Health Research Institute (OSHRI). Ten images were randomly picked from the MIPs for evaluating the image quality, and then these were rated by two experienced chest radiologists for pneumoconiosis according to the criteria of the OSHRI. Of the 33 institutions, the failed group (mean<60) scored 36.4% for radiological technique (RT), 30.3% for image quality (IQ) and 21.2% for the reading environment (RE). There were statistically significantly differences between the passed and failed groups for RT (75.8 ± 9.1 vs. 40.8 ± 13.6, p<0.001), for IQ (68.3 ± 5.8 vs. 47.8 ± 9.4, p<0.001) and for RE (78.3 ± 15.8 vs. 18.3 ± 21.9, p<0.001). The group that received education was significantly higher for the RT (68.7 vs. 53.2, p=0.032), the IQ (65.3 vs. 56.6, p=0.039) and the RE (76.2 vs. 47.0, p=0.005) than that for the group that didn't receive education. The MIPs need surveillance and education for improving the quality assurance health care in thoracic radiography for treating patients with pneumoconiosis and who have complications

  18. Evaluation of percutaneous radiologic placement of peritoneal dialysis catheters: technical aspects, results, and complications

    International Nuclear Information System (INIS)

    Hong, Hyun Pyo; Oh, Joo Hyeong; Yoon, Yub; Lee, Tae Won; Ihm, Chun Gyoo

    2001-01-01

    To evaluate the technical aspects, results and complications of the percutaneous radiologic placement of peritoneal dialysis catheters. Between December 1999 and April 2001, 26 peritoneal dialysis catheters were placed percutaneously in 26 consecutive patients by interventional radiologists. The patient group consisted of 16 men and ten women with a mean age of 55 (range, 30-77) years. The results and complications arising were reviewed, and the expected patency of the catheters was determined by means of Kaplan-Meier survival analysis. The technical success rate for catheter placement was 100% (26/26 patients). Severe local bleeding occurred in one patient due to by inferior epigastric artery puncture, and was treated by compression and electronic cautery. The duration of catheter implantation ranged from 1 to 510 days and the patency rate was 416±45 days. Catheter malfunction occurred in four patients. In two, this was restored by manipulation in the intervention room, and in one, through the use of urokinase. In three patients, peritonitis occurred. Catheters were removed from four patients due to malfunction (n=2), peritonitis (n=1), and death (n=1). Percutaneous radiologic placement of a peritoneal dialysis catheter is a relatively simple procedure that reduces the complication rate and improves catheter patency

  19. Evaluation of percutaneous radiologic placement of peritoneal dialysis catheters: technical aspects, results, and complications

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Hyun Pyo; Oh, Joo Hyeong; Yoon, Yub; Lee, Tae Won; Ihm, Chun Gyoo [Kyunghee University Hospital, seoul (Korea, Republic of)

    2001-01-01

    To evaluate the technical aspects, results and complications of the percutaneous radiologic placement of peritoneal dialysis catheters. Between December 1999 and April 2001, 26 peritoneal dialysis catheters were placed percutaneously in 26 consecutive patients by interventional radiologists. The patient group consisted of 16 men and ten women with a mean age of 55 (range, 30-77) years. The results and complications arising were reviewed, and the expected patency of the catheters was determined by means of Kaplan-Meier survival analysis. The technical success rate for catheter placement was 100% (26/26 patients). Severe local bleeding occurred in one patient due to by inferior epigastric artery puncture, and was treated by compression and electronic cautery. The duration of catheter implantation ranged from 1 to 510 days and the patency rate was 416{+-}45 days. Catheter malfunction occurred in four patients. In two, this was restored by manipulation in the intervention room, and in one, through the use of urokinase. In three patients, peritonitis occurred. Catheters were removed from four patients due to malfunction (n=2), peritonitis (n=1), and death (n=1). Percutaneous radiologic placement of a peritoneal dialysis catheter is a relatively simple procedure that reduces the complication rate and improves catheter patency.

  20. The diagnostic utility of ultrasonography, CT and PET/CT for the preoperative evaluation of cervical lymph node metastasis inpapillary thyroid cancer patients

    International Nuclear Information System (INIS)

    Kim Young Sang; Lee, Tae Hyun; Park, Dong Hee

    2016-01-01

    To compare the diagnostic utility of ultrasonography (US), CT and positron emission tomography/CT (PET/CT) in the preoperative evaluation of cervical lymph node metastasis in patients with papillary thyroid carcinoma. The study population consisted of 300 patients with pathologically diagnosed papillary thyroid carcinoma after thyroidectomy and neck dissection. Preoperative US, CT, and PET/CT findings were compared with pathologic outcomes after thyroidectomy and neck dissection. Sensitivity in detecting central lymph node metastasis (US 29.9%, CT 27.9%, PET/CT 18.8%) was lower than that for lateral lymph node metastasis (US 56.3%, CT 66.2%, PET/CT 43.7%). Specificity in detecting central lymph node metastasis (US 80.6%, CT 77.7%, PET/CT 83.0%) was lower than that for lateral lymph node metastasis (US 96.8%, CT 80.6%, PET/CT 95.2%). The combination of US and CT had higher specificity (77.3%) and higher sensitivity (33.1%) than US alone. PET/CT has no significant additional benefit over the combination of US and CT. In preoperative evaluations of neck lymph node metastasis, US and CT and PET/CT are more useful in lateral lymph node areas than in central lymph node areas. The combination of US and CT has higher sensitivity than US alone

  1. The diagnostic utility of ultrasonography, CT and PET/CT for the preoperative evaluation of cervical lymph node metastasis inpapillary thyroid cancer patients

    Energy Technology Data Exchange (ETDEWEB)

    Kim Young Sang; Lee, Tae Hyun; Park, Dong Hee [Dept. of Radiology, Korea Cancer Center Hospital, Seoul (Korea, Republic of)

    2016-08-15

    To compare the diagnostic utility of ultrasonography (US), CT and positron emission tomography/CT (PET/CT) in the preoperative evaluation of cervical lymph node metastasis in patients with papillary thyroid carcinoma. The study population consisted of 300 patients with pathologically diagnosed papillary thyroid carcinoma after thyroidectomy and neck dissection. Preoperative US, CT, and PET/CT findings were compared with pathologic outcomes after thyroidectomy and neck dissection. Sensitivity in detecting central lymph node metastasis (US 29.9%, CT 27.9%, PET/CT 18.8%) was lower than that for lateral lymph node metastasis (US 56.3%, CT 66.2%, PET/CT 43.7%). Specificity in detecting central lymph node metastasis (US 80.6%, CT 77.7%, PET/CT 83.0%) was lower than that for lateral lymph node metastasis (US 96.8%, CT 80.6%, PET/CT 95.2%). The combination of US and CT had higher specificity (77.3%) and higher sensitivity (33.1%) than US alone. PET/CT has no significant additional benefit over the combination of US and CT. In preoperative evaluations of neck lymph node metastasis, US and CT and PET/CT are more useful in lateral lymph node areas than in central lymph node areas. The combination of US and CT has higher sensitivity than US alone.

  2. Preoperative imaging in 78 living kidney donors using CE-MRA and DSA; Donor-Evaluation vor Lebendnierenspende: Vergleich von CE-MRA und DSA an 78 Patienten

    Energy Technology Data Exchange (ETDEWEB)

    Lemke, U.; Taupitz, M.; Hamm, B.; Kroencke, T.J. [Inst. fuer Radiologie, Charite - Universitaetsmedizin Berlin (Germany); Kluener, C. [Inst. fuer Radiologie und Neuroradiologie, Evangelisches Krankenhaus Oldenburg (Germany); Giessing, M.; Schoenberger, B. [Urologische Klinik und Poliklinik, Charite - Universitaetsmedizin Berlin (Germany)

    2008-01-15

    Purpose: to evaluate contrast-enhanced 3D magnetic resonance angiography (CE-MRA) and digital subtraction angiography (DSA) in comparison with the intraoperative findings in living kidney donors. Materials and methods: a total of 156 kidneys in 78 potential kidney donors were prospectively examined using CE-MRA (0.2 mmol Gd/kg, voxel size 1.3 x 0.8 x 2.0) and DSA. Two experienced radiologists assessed the images in consensus regarding the renal vascular anatomy and variants. The results for the 67 candidates accepted for donation were compared to the intraoperative findings. In the other kidneys not accepted for donor nephrectomy, MRA and DSA were compared with each other. Results: nineteen arterial variants were identified intraoperatively, of which 11 (58%) were also detected by preoperative CE-MRA and 10 (53%) by preoperative DSA. Of the 10 venous variants found intraoperatively, CE-MRA detected 8 (80%) and DSA 3 (30%). The agreement (kappa test) between MRI and DSA for all 156 evaluated kidneys was 0.7 for arterial variants (McNemar p = 0.12) and 0.3 for venous variants (McNemar p = 0.01). The preoperative choice of kidney (right or left) made on the basis of the renal vascular anatomy seen on CE-MRA and DSA differed in 22% of the 78 potential donors (McNemar P = 0.3). (orig.)

  3. Radiological health risk evaluation of radium contaminated land: A real life implementation

    International Nuclear Information System (INIS)

    Paridaens, J.

    2005-01-01

    A plot of land, currently used for dairy farming, has been contaminated over the years with radium due to the operation of one of the world's largest radium production plants. Within the framework of a global remediation approach for the plant surroundings, the land owner needed advice for a future destination of the land. Therefore, the radium contamination was accurately mapped, and on the basis of its severity a practically feasible subdivision of the land into four plots was proposed. For all four plots, the radiological risk was evaluated for the current type of land use and for possible alternative types. Hence a clear and usable advice could be formulated to the authorities reconciling public health, economic and practical issues. (authors)

  4. Evaluation of the Radiological Safety of 192 Ir Apparatus for Industrial Gamma Radiography

    International Nuclear Information System (INIS)

    Aquino, J. O.; Silva, F. C. A. da; Ramalho, A. T.; Godoy, J. M. O.

    2004-01-01

    The majority of the 192Ir apparatus for industrial gamma radiography have been in usage in Brazil for more than 20 years. They are portable, and almost all operate according to category II. The main objective of this work was to assess the radiological safety of the 11 models of 192Ir apparatus most used in Brazil. The 11 models of 192Ir apparatus were studied with respect to compliance with the main safety requirements of three editions of international Standards ISO 3999. Six models were already manufactured incorporating the safety devices specified in the first edition of ISO 3999, issued in 1977. However, five models were not. The validity of their type B certificates for transport packages was also evaluated. (Author) 8 refs

  5. Radioactive lightning rods: radiologic evaluation and regulatory policy related to its use in Cuba

    International Nuclear Information System (INIS)

    Lopez Forteza, Yamil; Quevedo Garcia, Jose R.; Diaz Guerra, Pedro I.; Cruz Dumenico, Gonzalez; Fuente Puch, Andres de la

    2001-01-01

    The radioactive lightning rod employment for the protection of facilities against atmospheric discharges reached its maximum splendor in the eighties. It was in fact at the end of this decade when the technical considerations related to the justification of this practice finally conclude that the production of such teams was abolished. For the regulatory authorities, however, it continues having validity the question related to the control of lightning rod still in use as well as the question related to the establishment of a coherent with the international practice national policy. The paper shows the results of the last 10 years of control of the radioactive lightning rod use in Cuba and the radiological evaluation carried out on the base of this experience. Lastly, it exposes the regulatory policy referred to the employment of the radioactive lightning rod in the country. (author)

  6. On-field evaluation of operator lens protective devices in interventional radiology

    International Nuclear Information System (INIS)

    Strocchi, S.; Chiaravalli, A.; Veronese, I.; Novario, R.

    2016-01-01

    The recent publication of the Euratom Directive 2013/59, adopting the reduction of eye lens dose limits from 150 to 20 mSv y"-"1, calls for the development of new tools and methodologies for evaluating the eye lens dose absorbed by the medical staff involved in interventional radiology practices. Moreover, the effectiveness of the protective devices, like leaded glasses, which can be employed for radiation protection purposes, must be tested under typical exposure scenarios. In this work, eye lens dose measurements were carried out on an anthropomorphic phantom simulating a physician bound to perform standard interventional neuroradiology angiographic procedures. The correlation between eye lens doses, in terms of Hp(0.07), and the equivalent dose [again in terms of Hp(0.07)] monthly measured with thermoluminescent dosemeters placed above the lead apron at the chest level was studied, in the presence and in the absence of different types of leaded glasses. (authors)

  7. An evaluation of the chemical, radiological, and ecological conditions of West Lake on the Hanford site

    Energy Technology Data Exchange (ETDEWEB)

    Poston, T.M.; Price, K.L.; Newcomer, D.R.

    1991-03-01

    West Lake and its immediate surrounding basin represent a unique habitat that is dominated by highly saline water and soil. The basin offers a valuable research site for studies of a rare and complex wetland area in the desert. This report is an evaluation of the chemical, radiological, and ecological conditions at West Lake and describes how ground water influences site properties. The scope of this evaluation consisted of a sampling program in 1989 and a review of data from the perspective of assessing the impact of Hanford Site operations on the physical, chemical, and ecological conditions of West Lake and its surrounding basin. The water level in West Lake fluctuates in relation to changes in the water table. The connection between West Lake and ground water is also supported by the presence of {sup 3}H and {sup 99}Tc in the ground water and in the lake. There are relatively high concentrations of uranium in West Lake; the highest concentrations are found in the northernmost isolated pool. Analyses of water, sediment, vegetation, and soil indicate possible shifts of isotropic ratios that indicate a reduction of {sup 235}U. Uranium-236 was not detected in West Lake water; its presence would indicate neutron-activated {sup 235}U from fuel reprocessing at Hanford. Trace metals are found at elevated concentrations in West Lake. Arsenic, chromium, copper, and zinc were found at levels in excess of US Environmental Protection Agency water quality criteria. Levels of radiological and chemical contamination in the West Lake basin are relatively low. Concentrations of fission isotopes exceed those that could be explained by atmospheric fallout, but fall short of action levels for active waste management areas. 31 refs., 8 figs., 18 tabs.

  8. An evaluation of the chemical, radiological, and ecological conditions of West Lake on the Hanford site

    International Nuclear Information System (INIS)

    Poston, T.M.; Price, K.L.; Newcomer, D.R.

    1991-03-01

    West Lake and its immediate surrounding basin represent a unique habitat that is dominated by highly saline water and soil. The basin offers a valuable research site for studies of a rare and complex wetland area in the desert. This report is an evaluation of the chemical, radiological, and ecological conditions at West Lake and describes how ground water influences site properties. The scope of this evaluation consisted of a sampling program in 1989 and a review of data from the perspective of assessing the impact of Hanford Site operations on the physical, chemical, and ecological conditions of West Lake and its surrounding basin. The water level in West Lake fluctuates in relation to changes in the water table. The connection between West Lake and ground water is also supported by the presence of 3 H and 99 Tc in the ground water and in the lake. There are relatively high concentrations of uranium in West Lake; the highest concentrations are found in the northernmost isolated pool. Analyses of water, sediment, vegetation, and soil indicate possible shifts of isotropic ratios that indicate a reduction of 235 U. Uranium-236 was not detected in West Lake water; its presence would indicate neutron-activated 235 U from fuel reprocessing at Hanford. Trace metals are found at elevated concentrations in West Lake. Arsenic, chromium, copper, and zinc were found at levels in excess of US Environmental Protection Agency water quality criteria. Levels of radiological and chemical contamination in the West Lake basin are relatively low. Concentrations of fission isotopes exceed those that could be explained by atmospheric fallout, but fall short of action levels for active waste management areas. 31 refs., 8 figs., 18 tabs

  9. Evaluation of the radiological consequences of a human intrusion in a granite formation

    International Nuclear Information System (INIS)

    Mejon-Goula, M.J.; Cernes, A.

    1989-07-01

    The methodology used in France for the evaluation of the radiological consequences associated to a nuclear waste repository in a deep geological formation is the deterministic one. This means that, in addition to the calculations in connection with the ''normal'' scenario, a limited number of ''altered'' scenarios, representing the different families of plausible scenarios and corresponding to the most important consequences resulting from there families, have to be taken into account. Among them, the human intrusion scenario is an important one. In a study performed inside the CEC PAGIS project and also for a french expert group (Goguel group) which carried out a methodologic work for the national site selection procedure, results concerning the quantification of the radiological consequences of a human intrusion have been obtained without attempting at the evaluation of its probability. The intrusion time ranged from 1 000 to 100 000 years and different contamination scenarios were taken into account. It was assumed that the intrusion led to the creation of a 100 cubic meters edge cubic cavity in the immediate vicinity to the repository. Using the description of the Auriat site realized for PAGIS, the calculation was performed in three steps: - calculation of the evolution of the repository until the intrusion time, - computation of the supposed instantaneous new flow distribution after the intrusion, - computation of the dose rate, using the mean volumic activity in the cavity walls and the outgoing flow rate. Three exposure scenarios were considered: - a worker in the mine exposed to by external irradiation and contaminated by inhalation of radioactive materials, -an animal drinking in the vicinity during the mining operation, - gardening after the closure of the mine. With the exception of the worker scenario (the dose rate may reach 10 -2 Sv/year, which is comparable with the normal exposure in a granite mine), the other dose rates were found to be quite low

  10. Preoperative alcoholism and postoperative morbidity

    DEFF Research Database (Denmark)

    Tonnesen, H; Kehlet, H

    1999-01-01

    BACKGROUND: Preoperative risk assessment has become part of daily clinical practice, but preoperative alcohol abuse has not received much attention. METHODS: A Medline search was carried out to identify original papers published from 1967 to 1998. Relevant articles on postoperative morbidity...... in alcohol abusers were used to evaluate the evidence. RESULTS: Prospective and retrospective studies demonstrate a twofold to threefold increase in postoperative morbidity in alcohol abusers, the most frequent complications being infections, bleeding and cardiopulmonary insufficiency. Wound complications...... to postoperative morbidity. CONCLUSION: Alcohol consumption should be included in the preoperative assessment of likely postoperative outcome. Reduction of postoperative morbidity in alcohol abusers may include preoperative alcohol abstinence to improve organ function, or perioperative alcohol administration...

  11. Preoperative surgical planning and simulation of complex cranial base tumors in virtual reality

    Institute of Scientific and Technical Information of China (English)

    YI Zhi-qiang; LI Liang; MO Da-peng; ZHANG Jia-yong; ZHANG Yang; BAO Sheng-de

    2008-01-01

    @@ The extremely complex anatomic relationships among bone,tumor,blood vessels and cranial nerves remains a big challenge for cranial base tumor surgery.Therefore.a good understanding of the patient specific anatomy and a preoperative planning are helpful and crocial for the neurosurgeons.Three dimensional (3-D) visualization of various imaging techniques have been widely explored to enhance the comprehension of volumetric data for surgical planning.1 We used the Destroscope Virtual Reality (VR) System (Singapore,Volume Interaction Pte Ltd,software:RadioDexterTM 1.0) to optimize preoperative plan in the complex cranial base tumors.This system uses patient-specific,coregistered,fused radiology data sets that may be viewed stereoscopically and can be manipulated in a virtual reality environment.This article describes our experience with the Destroscope VR system in preoperative surgical planning and simulation for 5 patients with complex cranial base tumors and evaluates the clinical usefulness of this system.

  12. A multicenter, retrospective study to evaluate the effect of preoperative stoma site marking on stomal and peristomal complications.

    Science.gov (United States)

    Baykara, Zehra Gocmen; Demir, Sevil Guler; Karadag, Ayise; Harputlu, Deniz; Kahraman, Aysel; Karadag, Sercan; Hin, Aysel Oren; Togluk, Eylem; Altinsoy, Meral; Erdem, Sonca; Cihan, Rabia

    2014-05-01

    Even though preoperative marking of the stoma area is considered important for the prevention of postoperative complications, not all healthcare institutions have universally adopted this practice. A multicenter, retrospective, descriptive study was conducted to determine the effect of stoma site marking on stomal and peristomal complications. The 1-year study included 748 patients (408 [54.5%] male, mean age 56.60 ± 16.73 years) from eight stomatherapy units in Turkey. Patient data, including age, gender, diagnosis, type of surgery, history of preoperative stoma site marking, person performing the marking, and postoperative complications, were obtained from patient records, abstracted, and analyzed. Cancer was the reason for the operation in 545 (72.9%) of the cases. In 287 patients (38.4%), the stoma and wound care nurse and/or surgeon marked the stoma area; this occurred 1 day before or on the day of surgery according to Wound Ostomy Continence Nurses Society and American Society of Colon and Rectal Surgeons recommendations. Stomal/ peristomal complications developed in 248 (33.2%) persons; the most frequently observed complications in patients were parastomal skin problems (136, 48.7%), mucocutaneous separation (52, 18.6%), and retraction (31, 11.1%). The rate of complications was higher among patients whose stoma site was not marked than among those whose stoma site was marked (22.9% and 46%, respectively; P stoma area should be marked preoperatively in all planned surgical interventions in order to reduce the risk of postoperative complications. Additional prospective and experimental studies on effectiveness of preoperative stoma site marking should be conducted with larger sample groups.

  13. A and B mode ultrasonography in preoperative evaluation of lens and posterior segment of dogs eyes with cataract

    Directory of Open Access Journals (Sweden)

    Bianca C. Martins

    2010-02-01

    Full Text Available Ultrasonography of the lens and posterior segment is an indispensable step in the preoperative evaluation of dogs with cataracts, since ophthalmoscopy is not feasible when there is opacification of the lens. This study evaluated the echographic conditions of cataractous lens and fundus of the eye in dogs affected by cataracts. The study was conducted in 30 dogs (56 eyes, 10 males and 20 females, with different types of cataracts at different stages of development. Echography in A and B modes, simultaneously, was carried out for the examination of the lens and posterior segment. The examinations revealed anterior cortical, posterior cortical and nuclear cataract in 12 eyes (21.4%, anterior cortical, posterior cortical, nuclear and posterior capsular in 23 eyes (41%, anterior cortical, posterior cortical and posterior capsular cataract in one eye (1.7%, anterior cortical and nuclear cataract in one eye (1.7%, anterior cortical, nuclear and posterior capsular cataract in five eyes (8.9%, and anterior cortical cataract in seven eyes (12.5%. Abnormal ultrasonographic alterations were observed in the posterior segment in 26 eyes evaluated (46.4%. Vitreal degeneration was detected in 12 eyes (21.4%, images of vitreal exudate or hemorrhage in seven eyes (12.5%, persistence of hyaloid artery in four eyes (7.1% and lens subluxation in three eyes (5.3%. The results obtained reiterate the importance of ultrasonography in canine patients presented for cataract surgery given that alterations of the posterior segment are difficult to identify in a clinical examination when the lens is opacified.A ultrassonografia do segmento posterior do bulbo do olho é etapa indispensável na avaliação de cães com catarata que serão submetidos à facectomia, uma vez que a oftalmoscopia não é factível quando há opacificação da lente, notadamente nas cataratas maduras. Este estudo avaliou as condições ecográficas da lente cataratogênica e do fundo de olho de c

  14. Preoperative staging of lung cancer with PET/CT: cost-effectiveness evaluation alongside a randomized controlled trial

    DEFF Research Database (Denmark)

    Søgaard, Rikke; Fischer, Barbara Malene B; Mortensen, Jann

    2011-01-01

    PURPOSE: Positron emission tomography (PET)/CT has become a widely used technology for preoperative staging of non-small cell lung cancer (NSCLC). Two recent randomized controlled trials (RCT) have established its efficacy over conventional staging, but no studies have assessed its cost-effective......PURPOSE: Positron emission tomography (PET)/CT has become a widely used technology for preoperative staging of non-small cell lung cancer (NSCLC). Two recent randomized controlled trials (RCT) have established its efficacy over conventional staging, but no studies have assessed its cost......-effectiveness. The objective of this study was to assess the cost-effectiveness of PET/CT as an adjunct to conventional workup for preoperative staging of NSCLC. METHODS: The study was conducted alongside an RCT in which 189 patients were allocated to conventional staging (n = 91) or conventional staging + PET/CT (n = 98......) and followed for 1 year after which the numbers of futile thoracotomies in each group were monitored. A full health care sector perspective was adapted for costing resource use. The outcome parameter was defined as the number needed to treat (NNT)-here number of PET/CT scans needed-to avoid one futile...

  15. Evaluation of the non-radiological environmental problems relating to the WIPP

    International Nuclear Information System (INIS)

    Baca, T.E.

    1983-02-01

    The major non-radiological environmental problems addressed are: air pollution, water pollution and sanitary waste, solid waste, domestic drinking water, occupational health and safety and toxic chemicals

  16. Geostatistical methods for radiological evaluation and risk analysis of contaminated premises

    International Nuclear Information System (INIS)

    Desnoyers, Y.; Jeannee, N.; Chiles, J.P.; Dubot, D.

    2009-01-01

    Full text: At the end of process equipment dismantling, the complete decontamination of nuclear facilities requires the radiological assessment of residual activity levels of building structures. As stated by the IAEA, 'Segregation and characterization of contaminated materials are the key elements of waste minimization'. From this point of view, the set up of an appropriate evaluation methodology is of primordial importance. The radiological characterization of contaminated premises can be divided into three steps. First, the most exhaustive facility analysis provides historical, functional and qualitative information. Then, a systematic (exhaustive or not) control of the emergent signal is performed by means of in situ measurement methods such as surface control device combined with in situ gamma spectrometry. Besides, in order to assess the contamination depth, samples can be collected from boreholes at several locations within the premises and analyzed. Combined with historical information and emergent signal maps, such data improve and reinforce the preliminary waste zoning. In order to provide reliable estimates while avoiding supplementary investigation costs, there is therefore a crucial need for sampling optimization methods together with appropriate data processing techniques. The relevance of the geostatistical methodology relies on the presence of a spatial continuity for radiological contamination. In this case, geostatistics provides reliable methods for activity estimation, uncertainty quantification and risk analysis, which are essential decision-making tools for decommissioning and dismantling projects of nuclear installations. Besides, the ability of this geostatistical framework to provide answers to several key issues that generally occur during the clean-up preparation phase is discussed: How to optimise the investigation costs? How to deal with data quality issues? How to consistently take into account auxiliary information such as historical

  17. Rade-aid a decision support system to evaluate countermeasures after a radiological accident

    International Nuclear Information System (INIS)

    Wagenaar, G.; Van Den Bosch, C.J.H.; Weger, D. de.

    1990-01-01

    After Chernobyl the authorities in many countries were overwhelmed by the enormous amount of information that was being generated by measuring and monitoring programs. In making decisions, this information had to be combined with the results of specific countermeasures, in order to determine the optimal strategy with respect to a large number of consequences. The development of RADE-AID, the Radiological Accident Decision AIDing system, is aimed at providing a powerful tool in the decision-making process. RADE-AID is developed by TNO (The Netherlands) in a joint contract with KfK (FRG) and NRPB (UK). In the first phase a demonstration system will be built, called RADE-AID/D. RADE-AID/D will be used as a decision support system in the intermediate and late phase after a radiological accident. RADE-AID/D will consider countermeasures with respect to external exposure and internal exposure by food ingestion. Countermeasures are evaluated considering reduction in doses and in numbers of health effects, costs, and social effects. The paper covers the structure of the program, presentation of data and results, and the decision analysis technique that is being used. This decision analysis part is an important feature of the system; an advanced decision analysis technique is used, that is able to compare data of varying nature. Furthermore the place of RADE-AID in the decision-making process will be treated. RADE-AID/D is an interactive computer program, that offers the user the possibility to enter relevant data and to have data and results displayed in a variety of ways. Furthermore the system contains an advanced decision analysis technique, that is able to compare data of varying nature. Input data for the decision analysis calculations are provided by models from UFOMOD and MARC-codes

  18. A mixed model study evaluating lean in the transformation of an Orthopaedic Radiology service

    International Nuclear Information System (INIS)

    Martin, Amanda Jane; Hogg, Peter; Mackay, Stuart

    2013-01-01

    Objective: The purpose of the study was to explore the proposition that lean is an effective methodology for service improvement within healthcare by using it to evaluate and implement change in a poor service. Design: A mixed model approach was used with data being collected before and after change. Setting: The orthopaedic radiology out-patient pathway in a large district general hospital was receiving increasing numbers of complaints with long waiting times and poor levels of satisfaction amongst patients and staff. Participants: Data were collected in the form of qualitative and quantitative data taken from questionnaires completed by staff and patients, and quantitative data extracted from the Radiology Information System. A proportionate stratified random sampling method was used to collect data from the patients and a theoretical sample was used for the staff. Intervention: The pre-implementation data was collected during a lean event in which a value stream map of the pathway was created. From this information, changes were planned and implemented, before collecting the post-implementation data using the same methods. Main outcome measures: The aims of the study were to compare pre-implementation and post-implementation data related to patient journey time, patient experience and staff and patient satisfaction. The quantitative data were analysed using Levene's test for equality of variance and a 2-sample t-test to test for comparison of the means. Descriptive statistics were used to analyse data collected from the polar and the selected response questions from the questionnaires, whilst thematic analysis was used to analyse the qualitative data. Results: Results demonstrated that the new service offered a better quality of patient experience with higher levels of staff satisfaction whilst enabling an improvement in productivity. Conclusions: The author proposes that these findings support the proposition that lean is an effective methodology for service

  19. Data processing for the evaluation of the thickness of protective barriers : Case of radiology rooms and external beam radiotherapy

    International Nuclear Information System (INIS)

    RANDRIANANTOANDRO, R.G.G.

    2004-01-01

    The regulation requires that the legal persons who have an intention to use radiation sources shall submit a notification to the Regulatory Authority of such an intention, which shall take the form of a licence or an authorization. The documents of radiological safety including design, construction, clinical utilisation...are attached to this notification. This work intends to assess the thickness of protection barrier and to suggest a facility design in radiology and in radiotherapy which comply with the safety standards. Because the steps of the thickness evaluation require a lot of calculation and abacs, the computer is used for this processing with Visual Basic. [fr

  20. Binary Decision Trees for Preoperative Periapical Cyst Screening Using Cone-beam Computed Tomography.

    Science.gov (United States)

    Pitcher, Brandon; Alaqla, Ali; Noujeim, Marcel; Wealleans, James A; Kotsakis, Georgios; Chrepa, Vanessa

    2017-03-01

    Cone-beam computed tomographic (CBCT) analysis allows for 3-dimensional assessment of periradicular lesions and may facilitate preoperative periapical cyst screening. The purpose of this study was to develop and assess the predictive validity of a cyst screening method based on CBCT volumetric analysis alone or combined with designated radiologic criteria. Three independent examiners evaluated 118 presurgical CBCT scans from cases that underwent apicoectomies and had an accompanying gold standard histopathological diagnosis of either a cyst or granuloma. Lesion volume, density, and specific radiologic characteristics were assessed using specialized software. Logistic regression models with histopathological diagnosis as the dependent variable were constructed for cyst prediction, and receiver operating characteristic curves were used to assess the predictive validity of the models. A conditional inference binary decision tree based on a recursive partitioning algorithm was constructed to facilitate preoperative screening. Interobserver agreement was excellent for volume and density, but it varied from poor to good for the radiologic criteria. Volume and root displacement were strong predictors for cyst screening in all analyses. The binary decision tree classifier determined that if the volume of the lesion was >247 mm 3 , there was 80% probability of a cyst. If volume was cyst probability was 60% (78% accuracy). The good accuracy and high specificity of the decision tree classifier renders it a useful preoperative cyst screening tool that can aid in clinical decision making but not a substitute for definitive histopathological diagnosis after biopsy. Confirmatory studies are required to validate the present findings. Published by Elsevier Inc.

  1. Evaluating the impact of a Canadian national anatomy and radiology contouring boot camp for radiation oncology residents.

    Science.gov (United States)

    Jaswal, Jasbir; D'Souza, Leah; Johnson, Marjorie; Tay, KengYeow; Fung, Kevin; Nichols, Anthony; Landis, Mark; Leung, Eric; Kassam, Zahra; Willmore, Katherine; D'Souza, David; Sexton, Tracy; Palma, David A

    2015-03-15

    Radiation therapy treatment planning has advanced over the past 2 decades, with increased emphasis on 3-dimensional imaging for target and organ-at-risk (OAR) delineation. Recent studies suggest a need for improved resident instruction in this area. We developed and evaluated an intensive national educational course ("boot camp") designed to provide dedicated instruction in site-specific anatomy, radiology, and contouring using a multidisciplinary (MDT) approach. The anatomy and radiology contouring (ARC) boot camp was modeled after prior single-institution pilot studies and a needs-assessment survey. The boot camp incorporated joint lectures from radiation oncologists, anatomists, radiologists, and surgeons, with hands-on contouring instruction and small group interactive seminars using cadaveric prosections and correlative axial radiographs. Outcomes were evaluated using pretesting and posttesting, including anatomy/radiology multiple-choice questions (MCQ), timed contouring sessions (evaluated relative to a gold standard using Dice similarity metrics), and qualitative questions on satisfaction and perceived effectiveness. Analyses of pretest versus posttest scores were performed using nonparametric paired testing. Twenty-nine radiation oncology residents from 10 Canadian universities participated. As part of their current training, 29%, 75%, and 21% receive anatomy, radiology, and contouring instruction, respectively. On posttest scores, the MCQ knowledge scores improved significantly (pretest mean 60% vs posttest mean 80%, Pradiology in addition to enhancing their confidence and accuracy in contouring. Copyright © 2015 Elsevier Inc. All rights reserved.

  2. The role of apparent diffusion coefficient value in evaluation of the response to preoperative chemoradiation in rectal carcinoma

    International Nuclear Information System (INIS)

    Sun Yingshi; Zhang Xiaopeng; Tang Lei; Li Jie; Cao Kun; Cui Yong; Qi Liping; Wang Ning

    2010-01-01

    Objective: To assess response of rectal carcinoma to preoperative chemoradiation therapy (CRT) using DWI and tumor ADC values, and to investigate the value of ADC in predicting and monitoring therapeutic effect of CRT. Methods: Twenty-six patients with primary rectal carcinoma undergoing preoperative CRT were recruited to the study. DWI was performed on a 1.5 T MR scanner in all patients at the time point of pre-therapy, the end of the 1st, 2nd week of therapy and pre-operation, respectively. ADC values of the tumors were calculated on the workstation. Randomized block design was applied to analyze cange in ADCs following treatment. Results All patients were divided into T-downstaging group (n=12) and T-non-downstaging group (n=14). In T-downstaging group, the mean tumor ADC values were (1.10 ± 0.13) x10 -3 , (1.32 ± 0.19) x 10 -3 , (1.35 ± 0.13) x 10 -3 , (1.32 ± 1.00) x 10 -3 mm 2 /s at the time point of pretreatment, week 1, week 2, pre-operation, respectively (F =16.420, P -3 mm 2 /s to (1.23 ± 0.13) x 10 -3 mm 2 /s at the time of week 1 (P>0.05). The ADC value in T-non-downstaging group continuously increased to (1.30 ± 0.16) x 10 -3 mm 2 /s at the end of the 2nd week of CRT (F=5.023, P st week as a diagnostic marker of tumor downstaging, when it was set as 11.6%, the sensitivity, specificity, positive predictive value and negative predictive value is 75.0%, 78.6%, 75.0% and 78.6% respectively, the area under curve (Az) was 0.774 (95% confidence interval: 0.583 to 0.964). Conclusions: An early significant increase of mean tumor ADC value in rectal carcinoma has a potential to predict therapeutic effect of CRT. One week after beginning CRT is an early time point to monitor therapy efficacy. (authors)

  3. Role of 99MTc-DTPA renal scintigraphy using gates protocol with extended acquisition time in evaluation of the function of pre-operative donor kidneys and post-operative remaining kidney

    International Nuclear Information System (INIS)

    Trinh Thi Minh Chau; Nguyen Xuan Canlh; Le Huu tam; Truong Quang Xuan

    2004-01-01

    Introduction: Radionuclide Methods have been extensively used in kidney transplantation. This non-invasive technique provides quantitative analysis of total and individual renal function as well as assessment of urinary outflow tract. Aim of this study was to evaluate renal function of potential kidney-donors and follow up post-nephrectomy kidney-donors by 99mTc-DTPA renal scintigraphy using Gates protocol with extended acquisition. MATERIALS AND Methods: This study included 72 living kidney donors. In addition to routine laboratory and radiological evaluations, a 99mTc-DTPA dynamic renal scintigraphy was acquired 15 second per frame for 30 minutes. Glomerular filtration rate (GFR) was calculated based on Gates protocol. Urinary outflow tract was assayed by renogram generated and consecutive dynamic renal images of up to 30 minute. Renal scintigraphy was also performed in follow-up of 37 post-nephrectomy kidney donors. Results 6 of 72 (8.3%) living related donors were excluded from nephrectomy due to reduced GFR of either total or individual kidney. One of 6 excluded donors had one non-functional kidney. No donors have shown urinary tract obstruction. In 66 kidney donors who were indicated nephrectomy, pre-nephrectomy mean total GFR, calculated by Gates method, was 108 mi/minute that was significantly higher than GFR result of 94 mi/minute by Cockcroft and Gault prediction equation (p 0.05). These results are not significant, indicative of functional compensation occuring after unilateral nephrectomy. Conclusion: Tc-99m DTPA dynamic renal scintigraphy using Gates protocol with extended acquisition time is a valuable simple radionuclide technique which is able to assess total and individual renal function and urinary outflow tract. This technique should be used as an integral part of the pre-operative evaluation contributing to the choice of nephrectomy side in potential kidney donors and as follow-up of post-operative remaining kidney. (authors)

  4. Evaluation of radiological impacts for environmental radioactivity distribution in the Kartini reactor area

    International Nuclear Information System (INIS)

    Yazid, M.; Suratman; Sutresna, G.; Aminjoyo, S.

    1996-01-01

    This evaluation covered of gross radioactivity. K-40 radioactivity in the water, soil and grass samples. The measurement of Cs-137 and Sr-90 radioactivity in the water samples have also been done. The aim of this research was determined of radiological impacts in the environment around the Kartini reactor. The water, soil and plant samples were counted of gross beta, Sr-90 activity by beta counter and for K-40, Cs-137 activity by low background gamma spectrometer. For this evaluation can be concluded there are no indication of the radioactivity release from the Kartini reactor operation. Gross beta radioactivity in the water, soil and grass sample are between 0.06-0.61 Bq/l, 0.24-0.79 Bq/g and 3.47-5.70 Bq/g ash. Radioactivity of K-40 in the water, soil and grass sample are between 0.09-0.56 Bq/l, 0.12-0.59 Bq/g and 0.29-0.93 Bq/g ash. The radioactivity of Cs-137 in the water samples are between under limit detectable level to 88.62 mBq/l and Sr-90 are between under limit detectable level to 24.22 mBq/l. (author)

  5. Production and consumption of foods in Spain, for its applications in radiological impact evaluations

    International Nuclear Information System (INIS)

    Robles, B.; Suanez, A.; Vazquez, C.

    1994-01-01

    This work is focussed on characterization, organization and analysis for the most relevant regional parameters used in dose assessment models when a food pathway contamination occurs. It was carried in the framework of a contract with a several European Institutions (CEA-IPSN, NRPB) for the development of a general methodology for the evaluation of the radiological consequences caused by accidentally radioactive releases into the environment. Spain, a member of the mediterranean country group, has a remarkably diverse climate which determines crop production agricultural practices, and consequently the animal and human diets. This project intention in to study in depth these particular characteristics and their consequences so that the estimated dose received by an individual reflects a variety of factors, therefore, the production and consumption of the five autonomous Mediterranean regions have been compared individually and globally with the national production and consumption averages. These data have been used in committed dose evaluation exercise applied to the ingestion of contaminated food throughout the first year after an accidental release of Caesium-137. This exercise was realized within the TARRAS (Transfer of Accidentally Released of Radionuclides in Agricultural Systems) project, financed by CE, ENRESA and CSN. (Author) 6 ref

  6. Evaluation of doses in conventional radiology in the cities of Rio de Janeiro e Recife, Brazil

    International Nuclear Information System (INIS)

    Azevedo, Ana Cecilia P.; Osibote, Adelaja O.; Khoury, Helen J.

    2005-01-01

    This work is part of a program of evaluating doses in patients developed in several hospitals in the States of Rio de Janeiro and Pernambuco. We used the program DoseCal to evaluate the Input Skin Dose (DEP) and the Effective Dose (DE) in big public hospitals in the cities of Rio de Janeiro and Recife. It were included in the survey the doses of chest radiographs, cervical spine, lumbar spine, skull and pelvis in the projections AP, PA and LAT. To chest in PA the average value of DEP for the hospital A was 0.19 mGy. For to hospital B was 0.07 mGy. For the exam of the skull in PA the average value in A was 3.25 mGy and B of 0.49 mGy. With respect to radiological techniques might be noted that in most cases the hospital A used kilovoltage lower than in B and miliamperes higher. This can be one of the explanations for the difference of the values found for DEP and DE. The results showed significant discrepancies in values of doses as radiographic techniques when compared to the requirements established by the European Community for X-rays with image quality. This result is due to several factors: filtration, radiographic technique, professional technical experience and performance of radiographic equipment

  7. Radiology on Internet: advice in consulting websites and evaluating their quality

    International Nuclear Information System (INIS)

    Rolland, Y.; Bousquet, C.; Duvauferrier, R.; Pouliquen, B.; Le Beux, P.; Fresnel, A.

    2000-01-01

    Services offered by Internet are increasing continually and 15,000 medical websites covering all the specialties are available presently. Finding relevant information with a spider-web organization is difficult. We recommend starting with hierarchical lists which propose a selection of sites corresponding to medical specialties. We give our selection of important radiological websites dealing with image databases, case reports, radioanatomy and continuing medical education. While surfing the Web, an evaluation of the quality of websites is necessary. We used quality criteria proposed by Darmoni to rate the quality of ten websites. The global quality is good; help pages and external links are the main noticed shortcomings. All webmasters should pay attention to quality criteria and show visible marks of Darmoni criteria on their home page. To be able to foresee which Internet options should be developed, we evaluated our website and sent a questionnaire to our users. Clinical cases are the most requested facilities; they could be used for continuing medical education. (orig.)

  8. Indicative to evaluate the efficiency of a program of radiological protection

    International Nuclear Information System (INIS)

    Lescano, R.; Caspani, C.

    1998-01-01

    The purpose of the present work is to find an indicator that permit to evaluate objectively, that is to say through a number, the efficient accomplishment of radiological protection actions that is reflected in an improvement of the safety conditions with which is developed labor. The employed method consists of average evaluation of the individual doses received by the workers pursuing their occupations, measure in a great population, contrasted with the average of environmental dose of located monitors always in the same place. It can be employed film dosimeters, TLD, direct-reading pocket dosimeters with exposure monitor or any combination between them, provided that in the course of the time are compared always the same. Applying this method between the year 1991 to 1997, in part of Santa Fe province (Argentine), is observed that the individual dose average of the workers varies randomly and also rises and decrease unco-ordinately the environmental dose, but relating booth is arrived to a numerical value that has a comparable behavior to the objectively observed. (author)

  9. Evaluation of the efficiency of different methods of personal dosimetry in vascular interventional radiology

    International Nuclear Information System (INIS)

    Bacchim Neto, F.A.; Alves, A.F.F.; Rosa, M.E.D.; Pina, D.R.

    2017-01-01

    Interventional Radiology - IR is the area of medicine that provides the largest occupational exposures. The dose values to which interventionists are exposed are difficult to standardize. The objective of the study is to perform a complete evaluation of occupational exposures and to determine the efficiency of different personal dosimetry methods used in IR. We evaluated the efficiencies of 6 different personal dosimetry methodologies used internationally to estimate the effective dose received by interventional professionals. And, based on this analysis, determine the characteristics of each methodology. One of the methods of personal dosimetry recommended by Brazilian legislation was the most conservative, overestimating, on average, the effective dose of professionals by up to 200%, reaching maximum values close to 400%. The most accurate method was that used in North America. This method did not overestimate the effective dose of the professionals more than a few percent and their standard deviation relative to the effective reference dose were the lowest. Based on these results, the choice of methodologies employing at least two dosimeters, one under and above protective aprons is recommended. In addition, in some situations where the dose in the hands may be high, additional dosimeters for this region are also recommended

  10. Evaluation of quality control in the college of medical radiological sciences, conventional x-ray department

    International Nuclear Information System (INIS)

    Babiker, Esameldeen Mohamed Tom

    2002-02-01

    Quality control in diagnostic radiography aims to ensure continuous production of diagnostic images with optimum quality, using minimum necessary dose to the patients and staff. Therefore an ineffective quality control program can lead to poor quality images that can impair diagnosis, increase operating costs and contribute to unnecessary radiation exposure to both patients and staff. Apply basic quality control program is responsibility of each x-ray facility, and to achieve maximum benefits, all levels of management and technical staff must support and participate in operating the programme. The main parameters to be monitored during the quality control programme include: dose consistency, k Vp accuracy, k Vp variations, exposure timer accuracy, besides checking image receptors, recording system and processing conditions. The aims of this project is to evaluate the quality control in the x-ray department of the college of medical radiologic sciences. The evaluation was an experimental study done by checking the operational status of the radiographic equipment, beside data collection using questionnaires regarding quality control. In the applied experiments the results show that there is a noted variation in the accuracy of k Vp, exposure timer and also in the dose consistency. The obtained results from image receptors and processing system showed noted variations too. The results of the questionnaire and direct interviewing showed other causes of quality degradation such as absence of test tools, the status of the equipment, absence of regular quality control testing, in addition to absence of an organized team to deal with quality. (Author)

  11. Feasibility study to combine the evaluation of radiological and chemical-toxicological effects of old contaminated sites

    International Nuclear Information System (INIS)

    Jacob, P.; Proehl, G.

    1997-01-01

    The uranium mining regions of the German Federal States Saxony, Thuringia and Saxony-Anhalt are contaminated by radionuclides and by chemical substances. For both, ionizing radiations and chemicals, concepts and models exists to assess possible health effects for the population living in such areas. However, these assessment models were developed independently for both kinds of contaminants. Therefore, the 9 th Conference of the State Ministers for Environmental Protection have claimed that for the evaluation of contaminated sites the radiological and chemical contaminants should be integrated into a joint assessment. This feasibility study describes the state of the art of the concepts and models used for the evaluation of radiological and chemical contaminants. The similarities and differences of these evaluation methods are identified and discussed. Suggestions are made for an integrated assessment to standardize the evaluation of sites contaminated by radionuclides or chemicals. (orig.) [de

  12. Internal Fixation of Complicated Acetabular Fractures Directed by Preoperative Surgery with 3D Printing Models.

    Science.gov (United States)

    Liu, Zhao-Jie; Jia, Jian; Zhang, Yin-Guang; Tian, Wei; Jin, Xin; Hu, Yong-Cheng

    2017-05-01

    The purpose of this article is to evaluate the efficacy and feasibility of preoperative surgery with 3D printing-assisted internal fixation of complicated acetabular fractures. A retrospective case review was performed for the above surgical procedure. A 23-year-old man was confirmed by radiological examination to have fractures of multiple ribs, with hemopneumothorax and communicated fractures of the left acetabulum. According to the Letounel and Judet classification, T-shaped fracture involving posterior wall was diagnosed. A 3D printing pelvic model was established using CT digital imaging and communications in medicine (DICOM) data preoperatively, with which surgical procedures were simulated in preoperative surgery to confirm the sequence of the reduction and fixation as well as the position and length of the implants. Open reduction with internal fixation (ORIF) of the acetabular fracture using modified ilioinguinal and Kocher-Langenbeck approaches was performed 25 days after injury. Plates that had been pre-bent in the preoperative surgery were positioned and screws were tightened in the directions determined in the preoperative planning following satisfactory reduction. The duration of the operation was 170 min and blood loss was 900 mL. Postoperative X-rays showed that anatomical reduction of the acetabulum was achieved and the hip joint was congruous. The position and length of the implants were not different when compared with those in preoperative surgery on 3D printing models. We believe that preoperative surgery using 3D printing models is beneficial for confirming the reduction and fixation sequence, determining the reduction quality, shortening the operative time, minimizing preoperative difficulties, and predicting the prognosis for complicated fractures of acetabulam. © 2017 Chinese Orthopaedic Association and John Wiley & Sons Australia, Ltd.

  13. Comparison of MR and fluoroscopic mucous fistulography in the pre-operative evaluation of infants with anorectal malformation: a pilot study

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Jose C.G.; Lotz, Jan W.; Pitcher, Richard D. [Stellenbosch University, Division of Radiodiagnosis, Department of Medical Imaging and Clinical Oncology, Tygerberg Academic Hospital, Cape Town (South Africa); Sidler, Daniel [Stellenbosch University, Division of Pediatric Surgery, Department of Surgical Sciences, Tygerberg Academic Hospital, Cape Town (South Africa)

    2013-08-15

    Anorectal malformations are often associated with rectal pouch fistulas. Surgical correction requires accurate evaluation of the presence and position of such fistulas. Fluoroscopy is currently the chosen modality for the detection of fistulas. The role of MRI is unexplored. To compare the diagnostic accuracy of MR versus fluoroscopic fistulography in the pre-operative evaluation of infants with anorectal malformation. We conducted a pilot study of infants requiring defunctioning colostomy for initial management of anorectal malformation. Dynamic sagittal steady-state free-precession MRI of the pelvis was acquired during introduction of saline into the mucous fistulas. Findings were compared among MR fistulography, fluoroscopic fistulography and intraoperative inspection. Eight children were included. Median age at fistulography was 15 weeks, inter-quartile range 13-20 weeks; all were boys. There was full agreement among MR fistulography, fluoroscopic fistulography and surgical findings. The pilot data suggest that MR fistulography is promising in the pre-operative evaluation of children with anorectal malformation. (orig.)

  14. Radiology today

    International Nuclear Information System (INIS)

    Donner, M.W.; Heuck, F.H.W.

    1981-01-01

    The book encompasses the proceedings of a postgraduate course held in Salzburg in June 1980. 230 radiologists from 17 countries discussed here the important and practical advances of diagnostic radiology, nuclear medicine and ultrasound as they contribute to gastrointestinal, urologic, skeletal, cardiovascular, pediatric, and neuroradiology. The book contains 55 single contributions of different authors to the following main themes: Cardiovascular, Radiology, pulmonary radiology, gastrointestinal radiology, urinary tract radiology, skeletal radiology, mammography, lymphography, ultrasound, ENT radiology, and neuroradiology. (orig./MG)

  15. Evaluation of awareness on radiation protection and knowledge about radiological examinations in healthcare professionals who use ionized radiation at work.

    Science.gov (United States)

    Yurt, Ayşegül; Cavuşoğlu, Berrin; Günay, Türkan

    2014-06-01

    In this study, we evaluated the knowledge and perception and mitigation of hazards involved in radiological examinations, focusing on healthcare personnel who are not in radiation-related occupations, but who use ionising radiation as a part of their work. A questionnaire was applied to physicians, nurses, technicians and other staff working in different clinics that use radiation in their work, in order to evaluate their knowledge levels about ionizing radiation and their awareness about radiation doses resulting from radiological examinations. The statistical comparisons between the groups were analyzed with the Kruskal Wallis test using the SPSS program. Ninety two participants took part in the study. Their level of knowledge about ionizing radiation and doses in radiological examinations were found to be very weak. The number of correct answers of physicians, nurses, medical technicians and other personnel groups were 15.7±3.7, 13.0±4.0, 10.1±2.9 and 11.8±4.0, respectively. In the statistical comparison between the groups, the level of knowledge of physicians was found to be significantly higher than the level of the other groups (p=0.005). The present study demonstrated that general knowledge in relation to radiation, radiation protection, health risks and doses used for radiological applications are insufficient among health professions using with ionizing radiation in their work.

  16. Application of Analytical Hierarchy Process Approach for Service Quality Evaluation in Radiology Departments: A Cross-Sectional Study.

    Science.gov (United States)

    Alimohammadzadeh, Khalil; Bahadori, Mohammadkarim; Hassani, Fariba

    2016-01-01

    Radiology department as a service provider organization requires realization of quality concept concerning service provisioning knowledge, satisfaction and all issues relating to the customer as well as quality assurance and improvement issues. At present, radiology departments in hospitals are regarded as income generating units and they should continuously seek performance improvement so that they can survive in the changing and competitive environment of the health care sector. The aim of this study was to propose a method for ranking of radiology departments in selected hospitals of Tehran city using analytical hierarchical process (AHP) and quality evaluation of their service in 2015. This study was an applied and cross-sectional study, carried out in radiology departments of 6 Tehran educational hospitals in 2015. The hospitals were selected using non-probability and purposeful method. Data gathering was performed using customized joint commission international (JCI) standards. Expert Choice 10.0 software was used for data analysis. AHP method was used for prioritization. "Management and empowerment of human resources'' (weight = 0.465) and "requirements and facilities" (weight = 0.139) were of highest and lowest significance respectively in the overall ranking of the hospitals. MS (weight = 0.316), MD (weight = 0.259), AT (weight = 0.14), TS (weight = 0.108), MO (weight = 0.095), and LH (0.082) achieved the first to sixth rankings respectively. The use of AHP method can be promising for fostering the evaluation method and subsequently promotion of the efficiency and effectiveness of the radiology departments. The present model can fill in the gap in the accreditation system of the country's hospitals in respect with ranking and comparing them considering the significance and value of each individual criteria and standard. Accordingly, it can predict an integration of qualitative and quantitative criteria involved and thereby take a decisive step towards

  17. Application of Analytical Hierarchy Process Approach for Service Quality Evaluation in Radiology Departments: A Cross-Sectional Study

    International Nuclear Information System (INIS)

    Alimohammadzadeh, Khalil; Bahadori, Mohammadkarim; Hassani, Fariba

    2016-01-01

    Radiology department as a service provider organization requires realization of quality concept concerning service provisioning knowledge, satisfaction and all issues relating to the customer as well as quality assurance and improvement issues. At present, radiology departments in hospitals are regarded as income generating units and they should continuously seek performance improvement so that they can survive in the changing and competitive environment of the health care sector. The aim of this study was to propose a method for ranking of radiology departments in selected hospitals of Tehran city using analytical hierarchical process (AHP) and quality evaluation of their service in 2015. This study was an applied and cross-sectional study, carried out in radiology departments of 6 Tehran educational hospitals in 2015. The hospitals were selected using non-probability and purposeful method. Data gathering was performed using customized joint commission international (JCI) standards. Expert Choice 10.0 software was used for data analysis. AHP method was used for prioritization. “Management and empowerment of human resources’’ (weight = 0.465) and “requirements and facilities” (weight = 0.139) were of highest and lowest significance respectively in the overall ranking of the hospitals. MS (weight = 0.316), MD (weight = 0.259), AT (weight = 0.14), TS (weight = 0.108), MO (weight = 0.095), and LH (0.082) achieved the first to sixth rankings respectively. The use of AHP method can be promising for fostering the evaluation method and subsequently promotion of the efficiency and effectiveness of the radiology departments. The present model can fill in the gap in the accreditation system of the country’s hospitals in respect with ranking and comparing them considering the significance and value of each individual criteria and standard. Accordingly, it can predict an integration of qualitative and quantitative criteria involved and thereby take a decisive step

  18. The Effect of Reduction Mammaplasty on the Vertebral Column: A Radiologic Study

    Directory of Open Access Journals (Sweden)

    Onder Karaaslan

    2013-01-01

    Full Text Available Some studies emphasized that anatomic mechanisms of vertebral aberrations could be associated with large breasts. The effect of mammaplasty operation on the vertebral column and body posture seems to be beneficial; in this trial, it was planned to investigate the objective radiologic effect of reduction mammaplasty on the posture of the vertebral column in a group of patients operated due to the large breasts. Thirty-four white women with large breasts were enrolled in this study. The patients were divided into three groups according to their breast cup sizes. Anteroposterior and lateral radiographs of the lumbosacral and thoracic spine were taken at baseline preoperatively, and the same radiographic images were taken in an average of 12 months later than the reduction mammaplasty operation. All were evaluated and compared for thoracic kyphosis angle and lumbar lordosis angle both preoperatively and postoperatively. The mean thoracic kyphosis angle was 40,53 preoperatively and 39,38 postoperatively. However, there was no statistically significant difference between the preoperative and postoperative measurements in all groups (P>0,05. The mean lumbar lordosis angle was 54,71 preoperatively and 53,18 postoperatively. Regarding the preoperative and postoperative measurements of lumbar lordosis angles, no statistically significant difference was found between the groups (P>0,05. Although breast size may be an important factor that affects body posture, reduction mammaplasty operations have little or no radiologic effect on the vertebral column.

  19. Pediatric radiology

    International Nuclear Information System (INIS)

    Benz-Bohm, G.

    1997-01-01

    Pediatric radiology is an important subsection of diagnostic radiology involving specific difficulties, but unfortunately is quite too often neglected as a subject of further education and training. The book therefore is not intended for specialists in the field, but for radiologists wishing to plunge deeper into the matter of pediatric radiology and to acquire a sound, basic knowledge and information about well-proven modalities, the resulting diagnostic images, and interpretation of results. The book is a compact guide and a helpful source of reference and information required for every-day work, or in special cases. With patients who are babies or children, the challenges are different. The book offers all the information needed, including important experience from pediatric hospital units that may be helpful in diagnostic evaluation, information about specific dissimilarities in anatomy and physiology which affect the imaging results, hints for radiology planning and performance, as well as information about the various techniques and their indication and achievements. The book presents a wide spectrum of informative and annotated images. (orig./CB) [de

  20. Microbiological contamination in digital radiography: evaluation at the radiology clinic of an educational institution.

    Science.gov (United States)

    Malta, Cristiana P; Damasceno, Naiana Nl; Ribeiro, Rosangela A; Silva, Carolina Sf; Devito, Karina L

    2016-12-01

    The aim of this study was to evaluate the contamination rate of intra and extraoral digital X ray equipment in a dental radiology clinic at a public educational institution. Samples were collected on three different days, at two times in the day: in the morning, before attending patients, and at the end of the day, after appointment hours and before cleaning and disinfection procedures. Samples were collected from the periapical X-ray machine (tube head, positioning device, control panel and activator button), the panoramic X- ray machine (temporal support, bite block, control panel and activator button), the intraoral digital system (sensor), and the digital system computers (keyboard and mouse). The samples were seeded in different culture media, incubated, and colony forming units (CFU/mL) counted. Biochemical tests were performed for suspected colonies of Staphylococcus, Streptococcus and Gramnegative bacilli (GNB). Fungi were visually differentiated into filamentous fungi and yeasts. The results indicated the growth of fungi and Staphylococcus fromall sampling locations. GNB growth was observed from all sites sampled from the intraoral X-ray equipment. On the panoramic unit, GNB growth was observed in samples from activator button, keyboard and mouse. In general, a higher number of CFU/mL was present before use. It can be concluded that more stringent protocols are needed to control infection and prevent X-ray exams from acting as vehicle for cross contamination. Sociedad Argentina de Investigación Odontológica.

  1. Malpractice suits in chest radiology: an evaluation of the histories of 8265 radiologists.

    Science.gov (United States)

    Baker, Stephen R; Patel, Ronak H; Yang, Lily; Lelkes, Valdis M; Castro, Alejandro

    2013-11-01

    The aim of this study was to present rates of claims, causes of error, percentage of cases resulting in a judgment, and average payments made by radiologists in chest-related malpractice cases in a survey of 8265 radiologists. The malpractice histories of 8265 radiologists were evaluated from the credentialing files of One-Call Medical Inc., a preferred provider organization for computed tomography/magnetic resonance imaging in workers' compensation cases. Of the 8265 radiologists, 2680 (32.4%) had at least 1 malpractice suit. Of those who were sued, the rate of claims was 55.1 per 1000 person years. The rate of thorax-related suits was 6.6 claims per 1000 radiology practice years (95% confidence interval, 6.0-7.2). There were 496 suits encompassing 48 different causes. Errors in diagnosis comprised 78.0% of the causes. Failure to diagnose lung cancer was by far the most frequent diagnostic error, representing 211 cases or 42.5%. Of the 496 cases, an outcome was known in 417. Sixty-one percent of these were settled in favor of the plaintiff, with a mean payment of $277,230 (95% confidence interval, 226,967-338,614). Errors in diagnosis, and among them failure to diagnose lung cancer, were by far the most common reasons for initiating a malpractice suit against radiologists related to the thorax and its contents.

  2. Radiological evaluation of the cranio vertebral junction; Avaliacao radiologica da transicao cranio-vertebral

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Silvia Marcal Benicio de; Haetinger, Rainer Guilherme [Med Imagem - Beneficiencia Portuguesa de Sao Paulo, SP (Brazil). Setor de Cabeca e Pescoco]. E-mail: sbm@uol.com.br; Schettini, Marianna Cunha; Lima, Sergio Santos [Med Imagem - Beneficiencia Portuguesa de Sao Paulo, SP (Brazil); Mourao, Maria Lucia; Mendonca, Renato Adam [Med Imagem - Beneficiencia Portuguesa de Sao Paulo, SP (Brazil). Setor de Neuroradiologia

    2005-04-15

    The cranio vertebral junction (CVJ) comprises the occiput, atlas, their joints and ligaments. Besides conventional x-rays other imaging methods are need for the assessment of CVJ including high resolution computerized tomography (CT) and magnetic resonance imaging (MRI) which provide specific parameters such as field of view, slice thickness and incremental movement of the patient. A dynamic study is also important to assess the stability of the cranio vertebral junction and the effect upon the bulbomedullary junction. The aim of this study is to review the techniques used in the evaluation of the CVJ, the semiological parameters, and the most frequent disorders affecting this region. We review the literature and present conventional x-ray, CT and MRI images from the didactic file of the Radiology service 'Med Imagem - Beneficiencia Portuguesa de Sao Paulo, SP, Brazil, of cases with normal anatomy and the main congenital and acquired disorders of the CVJ. In daily practice, CVJ disorders are diagnoses using CT and MRI scans of the head and cervical spine. It is essential to be familiar with these conditions in order to preform specific tests which will allow a detailed study of the CVJ, thus providing the basis for the treatment, whenever indicated. (author)

  3. Preliminary Evaluation of a Radiological Biomarker to Characterize the Longitudinal Evolution of Tuberculosis

    Energy Technology Data Exchange (ETDEWEB)

    Muñoz-Hernando, M.; Macias, P.; Abella, M.; Desco, M.; Sharpe, S.; Vaquero, J.J.; Muñoz-Barrutia, M.

    2016-07-01

    Tuberculosis (TB) remains the world's second-deadliest disease, due to a single infectious agent. The population that has developed multidrug resistance is increasingly important boosting the interest to run assays of novel multi-antibiotic combinations. Drug assays of new chemotherapies for treating TB require following subjects to assess response at several time points. Radiological examination of the subjects is a promising technique for that task. In this context, the main objective of the present work is twofold: 1) To evaluate the performance of a tool, dedicated to the automatic segmentation of TB infected lungs in chest Computed Tomography (CT) scans; 2) To present a method to automatically compute an imaging biomarker capable to characterize the disease longitudinal evolution. The selected biomarker is based on the intensity differences between the healthy and sick lung parenchyma in chest CT scans. Our results demonstrated a good similarity between the automatically segmented lungs and those delineated using a semi-automatic tool that relays on manual corrections. Furthermore, regarding the automatic extraction of the imaging biomarker, results showed a good inter-method agreement and concordance with respect to those obtained using a visually defined set of thresholds. (Author)

  4. A comparison of bone scanning and radiology in the evaluation of patients with metabolic bone disease

    International Nuclear Information System (INIS)

    Fogelman, I.; Carr, D.

    1980-01-01

    Bone scan and radiographs were evaluated in 80 patients with metabolic bone disease (27 with osteoporosis, 14 with primary hyperparathyroidism, 24 with renal osteodystrophy and 15 with osteomalacia). The bone scan did not suggest a metabolic bone disorder in any of 27 patients with histologically proven osteoporosis. In 22 (81%) patients radiographs were reported as showing osteoporosis. In 19 (70%) vertebral fractures were seen on X-ray while these were noted in 11 (41%) patients on the bone scan. Vertebral fractures were usually visualised on the bone scan when these had occurred less than one year previously. In primary hyperparathyroidism the bone scan was suggestive of a metabolic bone disorder in 7 of 14 (50%) patients, while radiographs were reported as showing evidence of hyperparathyrodism in three (21%) cases. The bone scan suggested the presence of a metabolic bone disorder in all 24 patients with renal osteodystrophy and 15 patients with osteomalacia while the correct diagnosis was obtained in 14 (58%) and nine (60%) of these patients on X-ray. It is concluded that the bone scan is the more sensitive investigation in patients with osteomalacia, primary hyperparathyroidism and renal osteodystrophy. For osteoporosis radiology is the investigation of choice but the bone scan may be of value in assessing the duration of vertebral collapse. (author)

  5. Evaluation of radiological safety conditions of panoramic portable irradiators of industrial radiography used in Brazil

    International Nuclear Information System (INIS)

    Aquino, Josilto Oliveira de

    2003-08-01

    In Brazil, the applications of ionizing radiation in industrial area are performed in about 900 installations, in which around 3000 radioactive sources are handled. Industrial radiography represents 14 % of this total, with 217 X rays equipment and 287 gamma radiography apparatus, according to a survey conducted in the present work. From these gamma apparatus, 90 % employ 192 Ir sources, followed by 60 Co and 75 Se, with 5 % each. The great majority of the 192 Ir apparatus have been in continuous usage in Brazil for more than 20 years, which means that they are old equipment. The totality of the 11 models of 192 Ir apparatus used in Brazil is imported from abroad. Those apparatus are portable, and almost all operate according to category II, i.e., the source assembly is mechanically projected out of the container. This last characteristic, besides the fact that the apparatus are already old-fashioned and worn-out, raises concerns about their radiological safety. The main objective of this work was to develop a specific methodology for inspection, testing and assessment of the radiological safety devices and state of maintenance of the 192 Ir apparatus. The idea is to prevent accidents, as physical failures can lead to overexposure of working staffs. In order to accomplish this, almost a hundred 192 Ir apparatus, from the 11 models used in Brazil, were studied. According to our results, almost 20 % of the 97 apparatus evaluated presented some kind of unsafe condition for proper operation, like poor state of maintenance and faults at the lock that retains the source at the secure position. From the 11 imported models of 192 Ir apparatus in use in Brazil, six models were already manufactured incorporating the safety devices specified by the first edition of the Standard ISO 3999, edited in 1977. However, five models do not comply even with this first edition of the Standard ISO 3999. Thus, they lack some important and basic safety devices. None of the 11 models comply

  6. Assessing Expertise in Radiology : Evaluating and Improving the Assessment of Knowledge and Image Interpretation Skill

    NARCIS (Netherlands)

    Ravesloot, C.J.

    2016-01-01

    Aim: Expert radiologists are excellent image interpreters. Unfortunately, image interpretation errors are frequent even among experienced radiologists and not much is known about which factors lead to expertise. Increasing assessment quality can improve radiological performance. Progress tests can

  7. Evaluation of Stress and a Stress-Reduction Program Among Radiologic Technologists.

    Science.gov (United States)

    Reingold, Lynn

    2015-01-01

    To investigate stress levels and causes of stress among radiologic technologists and determine whether an intervention could reduce stress in a selected radiologic technologist population. Demographic characteristics and data on preintervention stress sources and levels were collected through Internet-based questionnaires. A 6-week, self-administered, mindfulness-based stress-reduction program was conducted as a pilot intervention with 42 radiologic technologists from the Veterans Administration Medical Center. Data also were collected postintervention. Identified sources of stress were compared with findings from previous studies. Some radiologic technologists experienced improvement in their perceptions of stress after the intervention. Sources of stress for radiologic technologists were similar to those shown in earlier research, including inconsistent management, poor management communication, conflicting demands, long work hours, excessive workloads, lack of work breaks, and time pressures. The mindfulness-based stress-reduction program is an example of an inexpensive method that could improve personal well-being, reduce work errors, improve relationships in the workplace, and increase job satisfaction. More research is needed to determine the best type of intervention for stress reduction in a larger radiologic technologist population.

  8. OECD/NEA Radiological characterisation in decommissioning - Evaluation of questionnaire. Strategies for Radiological Characterisation used by Decommissioning Projects in OECD Countries

    International Nuclear Information System (INIS)

    Thierfeldt, Stefan; Haneke, K.

    2012-01-01

    In the first half of 2011, the Radiological Characterization and Decommissioning Task Group (RCD) of the WPDD of the OECD/NEA has prepared a questionnaire on the characterisation of nuclear facilities that has been circulated among nuclear installations in various OECD countries. The aim of this questionnaire was to gather information on the approaches and methods that are used for radiological characterisation (RC) for systems and components, for buildings and for sites (land), on domestic and international guidance and regulations that govern RC, and on the experience with RC that is already available in the particular country. The number of responses to this questionnaire that were received in the second half of 2011 was very satisfactory, so that a broad overview is now available from the following countries: Belgium, Canada, Denmark, Finland, France, Germany, Japan, Korea, Spain, Sweden, and United Kingdom. The presentation deals with the results that were obtained from the evaluation of these questionnaires and gives overviews of the objectives of characterisation, the input data for planning of characterisation, the measurement techniques that were used for metallic structures and components, for buildings and for sites, the data management and QA measures, the obstacles that were encountered, the experience with availability of as-built plans, the regulatory framework and guidelines, and the costs for RC. All information on RC is further broken down with respect to the operational phase (where RC is used for preliminary decommissioning planning), the transition phase (where RC supports decommissioning planning) and the actual decommissioning phase (where RC is needed for dismantling, decontamination and treatment of systems, components, buildings etc.). The presentation also offers conclusions on these subjects. (authors)

  9. A CLINICAL STUDY ON SURGICAL MANAGEMENT OF TIBIAL PLATEAU FRACTURES - FUNCTIONAL AND RADIOLOGICAL EVALUATION

    Directory of Open Access Journals (Sweden)

    Bhavani

    2015-10-01

    Full Text Available BACKGROUND: Tremendous advance in mechanization and fastness of travel have been accompanied by steep increase in number and severity of fractures and those of tibial plateau are no exception. Knee being one of the major weight bearing joints of the body, fractures around it will be of paramount importance. AIM OF STUDY: This study is to analyze the functional outcome of CRIF or ORIF with or without bone grafting in tibial plateau fractures in adults. MATERIALS AND METHODS: 30 cases of tibial plateau fractures treated by various modalities were studied from 1 - 8 - 2012 to 31 - 1 - 2014 at our institution and followed for a minimum of 6 months. Fractures were evaluated using Modified Rasmussen’s Clinical, Radiological grading system. RESULTS : The selected patients were evaluated thoroughly and after the relevant investigations, were taken for surgery. The fractures were classified as per the SCHATZKER’S types and operated accordingly with CRIF with Percutaneous cannulated cancellous screws, ORIF with buttress plate/LCP with or without bone grafting. Immobilization of fractures continued for 3 weeks by POP slab. Early range of motion was then started. Weight bearing up to 6 - 8 weeks was not allowed. The full weight bearing deferred until 12 weeks or complete fracture union . The knee range of motion was excellent to very good, gait and weight bearing after complete union was satisfactory, knee stiffness in 3 cases , wound dehiscence and infection in 1 case and non - union in none of our cases was noted. CONCLUSION: Functional outcome is better in operatively treated tibial plateau fractures in adults, because it gives excellent anatomical reduction and rigid fixation to restore articular congruity and early motion thereby preventing knee stiffness.

  10. Operation evaluation of Venezuelan radiological service; Evaluacion del funcionamiento de un servicio de radiologia de un hospital venezolano

    Energy Technology Data Exchange (ETDEWEB)

    Padron, A.; Sanchez, A.; Martinez, V.; D' Alessandro, A.

    2006-07-01

    This work's intention is to evaluate the Radiology Service operation of Venezuelan hospital based on the Venezuelan Norms for the ionizing radiations use in medical diagnostic. The investigation's results show a violation of these norms. Therefore we propose some recommendations (about the personal and area dosimetry, medical equipment maintenance and calibration and the elaboration of procedures manuals) to be considered by the Institution to optimizing the Service's activities. (Author)

  11. Preoperative staging of lung cancer with PET/CT: cost-effectiveness evaluation alongside a randomized controlled trial

    International Nuclear Information System (INIS)

    Soegaard, Rikke; Fischer, Barbara Malene B.; Mortensen, Jann; Hoejgaard, Liselotte; Lassen, Ulrik

    2011-01-01

    Positron emission tomography (PET)/CT has become a widely used technology for preoperative staging of non-small cell lung cancer (NSCLC). Two recent randomized controlled trials (RCT) have established its efficacy over conventional staging, but no studies have assessed its cost-effectiveness. The objective of this study was to assess the cost-effectiveness of PET/CT as an adjunct to conventional workup for preoperative staging of NSCLC. The study was conducted alongside an RCT in which 189 patients were allocated to conventional staging (n = 91) or conventional staging + PET/CT (n = 98) and followed for 1 year after which the numbers of futile thoracotomies in each group were monitored. A full health care sector perspective was adapted for costing resource use. The outcome parameter was defined as the number needed to treat (NNT) - here number of PET/CT scans needed - to avoid one futile thoracotomy. All monetary estimates were inflated to 2010 EUR. The incremental cost of the PET/CT-based regimen was estimated at 3,927 EUR [95% confidence interval (CI) -3,331; 10,586] and the NNT at 4.92 (95% CI 3.00; 13.62). These resulted in an average incremental cost-effectiveness ratio of 19,314 EUR, which would be cost-effective at a probability of 0.90 given a willingness to pay of 50,000 EUR per avoided futile thoracotomy. When costs of comorbidity-related hospital services were excluded, the PET/CT regimen appeared dominant. Applying a full health care sector perspective, the cost-effectiveness of PET/CT for staging NSCLC seems to depend on the willingness to pay in order to avoid a futile thoracotomy. However, given that four outliers in terms of extreme comorbidity were all randomized to the PET/CT arm, there is uncertainty about the conclusion. When hospital costs of comorbidity were excluded, the PET/CT regimen was found to be both more accurate and cost saving. (orig.)

  12. An Evaluation of the Diagnostic Accuracy of the Grade of Preoperative Biopsy Compared to Surgical Excision in Chondrosarcoma of the Long Bones

    Directory of Open Access Journals (Sweden)

    Robert Jennings

    2010-01-01

    Full Text Available Chondrosarcoma is the second most common primary malignant bone tumour. Distinguishing between grades is not necessarily straightforward and may alter the disease management. We evaluated the correlation between histological grading of the preoperative image-guided needle biopsy and the resection specimen of 78 consecutive cases of chondrosarcoma of the femur, humerus, and tibia. In 11 instances, there was a discrepancy in histological grade between the biopsy and surgical specimen. Therefore, there was an 85.9% (67/78 accuracy rate for pre-operative histological grading of chondrosarcoma, based on needle biopsy. However, the accuracy of the diagnostic biopsy to distinguish low-grade from high-grade chondrosarcoma was 93.6% (73/78. We conclude that accurate image-guided biopsy is a very useful adjunct in determining histological grade of chondrosarcoma and the subsequent treatment plan. At present, a multidisciplinary approach, comprising experienced orthopaedic surgeons, radiologists, and pathologists, offers the most reliable means of accurately diagnosing and grading of chondrosarcoma of long bones.

  13. The Anesthesia Preoperative Evaluation Clinic (APEC): a prospective randomized controlled trial assessing impact on consultation time, direct costs, patient education and satisfaction with anesthesia care.

    Science.gov (United States)

    Schiff, J H; Frankenhauser, S; Pritsch, M; Fornaschon, S A; Snyder-Ramos, S A; Heal, C; Schmidt, K; Martin, E; Böttiger, B W; Motsch, J

    2010-07-01

    Anesthetic preoperative evaluation clinics (APECs) are relatively new institutions. Although cost effective, APECs have not been universally adopted in Europe. The aim of this study was to compare preoperative anesthetic assessment in wards with an APEC, assessing time, information gain, patient satisfaction and secondary costs. Two hundred and seven inpatients were randomized to be assessed at the APEC or on the ward by the same two senior anesthetists. The outcomes measured were the length of time for each consultation, the amount of information passed on to patients and the level of patient satisfaction. The consultation time was used to calculate impact on direct costs. A multivariate analysis was conducted to detect confounding variables. Ninety-four patients were seen in the APEC, and 78 were seen on the ward. The total time for the consultation was shorter for the APEC (mean 8.4 minutes [Plocation of the consultation. Gain in information was significantly influenced by age, education and the location of the visit. The APEC reduced consultation times and costs and had a positive impact on patient education. The cost savings are related to personnel costs and, therefore, are independent of other potential savings of an APEC, whereas global patient satisfaction remains unaltered.

  14. Current state of a dosimetric evaluation programme in diagnostic radiology installations in Spain

    International Nuclear Information System (INIS)

    Vano, E.; Gonzalez, L.; Calzado, A.; Delgado, V.; Moran, P.; Sanchez, B.; Murias, F.

    1988-01-01

    The Medical Physics Group at the School of Medicine of the Complutense University of Madrid, started a programme on the study of radiation doses in relation to Diagnostic Radiology in the area of Madrid in 1986, in cooperation with the Department of Health and Consumer Affairs, and several Madrid area hospitals as well as some Outpatient Centers. In Spain, the National Health Service (NHS) (through the National Institute of Health, INSALUD), potentially cares for the health of approximately 94% of the population. This figure reaches 99% at the Community of Madrid. Radiological examinations are performed mainly in Hospitals and Outpatient Centers (the latter making up a first link in the patient's radiological diagnosis). Private Diagnostic Radiology is used by the remaining 6% of the population (not taking into account the population attended in military hospitals), and by patients who in spite of having access to NHS Diagnostic Radiology Services, prefer to choose the private sector for different reasons. Besides the data we obtained during the first year of study from four large Madrid-area hospitals (and a few outpatient centers); we have used data furnished by the Department of Health and Consumer Affairs, the INSALUD and other sources

  15. Sampling on radiological protection training in diagnostic radiology

    International Nuclear Information System (INIS)

    Gaona, E.

    2001-01-01

    Radiological security aspects were evaluated in radiology departments from Mexico City. The study was carried out in two stages, the first one evaluated 40 departments just before the implementation of the new Official Mexican Standards related to Radiological Security and Quality Control in Radiology; in the second stage 33 departments were evaluated 2 years after those standards were implanted, showing a favorable impact of the training programs for the type of answers obtained [es

  16. Surgical requirements for radiological diagnostics of liver pathologies

    International Nuclear Information System (INIS)

    Gruenberger, T.

    2004-01-01

    Radiology is an essential preoperative tool for a liver surgeon to plan extent of resection and potential difficulties during liver surgery. Primary goal in defining liver pathologies is a careful patients' history, a clinical evaluation and reviewing at least one radiological film one could acquire. Don't rely on written reports that may direct you in a useless track. This overview tries to address the essential radiological requests of a surgeon in defining liver tumors ethiology and best optional treatment. Major advances in radiologic diagnostics led to an improvement in the adequate staging of a given liver pathology. Therefore we are nowadays able to inform our patients about possible treatment options without leaving a big gap to possible intra-operative findings which may alter the therapy. Surgical exploration to define therapeutic strategies becomes fundamental only in a minority of patients with unclear preoperative imaging studies. Interdisciplinary groups should define future strategies in a patient with a given liver pathology. Specialisation has defined the hepatobiliary surgeon which should be consulted in case of a liver or biliary tumor to guide possible therapeutic treatment options. (orig.) [de

  17. 3D surface rendering of images from multiple MR pulse sequences in the pre-operative evaluation of hepatic lesions

    International Nuclear Information System (INIS)

    Bjerner, T.; Johansson, L.; Ahlstroem, H.; Haglund, U.

    1998-01-01

    Purpose: To develop a method for making three-dimensional (3D) reconstructions of liver vessels and hepatic lesions from different MR data sets. Material and Methods: To reduce the time required for segmentation and reconstructions, we used T1, T2 and phase contrast angiography, optimised for liver, lesion and vessels respectively. Following segmentation and reconstruction, the different volumes were combined on the same workstation and presented to the surgeon. Results and Conclusion: Segmentation and reconstruction took 1-2 h. To be able to combine the volumes from the different data sets, certain criteria had to be fulfilled: (a) the field of view had to be constant; (b) the same volume had to be scanned every time which meant that the slice thickness and the number of slices could be adjusted as long as the volume covered was the same; and (c) the positioning of each volume had to be identical between every scan. The resulting 3D reconstruction gave the surgeon a clear appreciation of the different lesions and their relation to the different liver segments in the pre-operative planning of hepatic resections. (orig.)

  18. The Role of Preoperative Imaging in the Management of Nonsyndromic Lambdoid Craniosynostosis.

    Science.gov (United States)

    Ranganathan, Kavitha; Rampazzo, Antonio; Hashmi, Asra; Muraszko, Karin; Strahle, Jennifer; Vercler, Christian J; Buchman, Steven R

    2018-01-01

    The necessity of imaging for patients with craniosynostosis is controversial. Lambdoid synostosis is known to be associated with additional anomalies, but the role of imaging in this setting has not been established. The purpose of this study was to evaluate the impact of preoperative imaging on intraoperative and postoperative management among patients undergoing operative intervention for lambdoid craniosynostosis. A retrospective review of patients undergoing cranial vault remodeling for lambdoid craniosynostosis between January 2006 and 2014 was conducted. Patient demographics, age at computed tomography scan, age at surgery, results of the radiologic evaluation, operative technique, and modification of the diagnosis following the radiologic studies were analyzed. A pediatric neuroradiology and the surgical team interpreted the radiographs. The primary outcome was change in intraoperative or postoperative management based on imaging results. A total of 11 patients were diagnosed with lambdoid synostosis. Of these patients, 81.8% had abnormalities on imaging relevant to operative planning. The most common anomalies were Chiari I malformation (45%) and venous anomalies of the posterior fossa (36%). Preoperative imaging altered the management of 9 (81.8%) patients. Closer follow-up was required for 6 patients (54%). Suboccipital decompression was performed in 4 patients (36%). Venous anomalies were found in 4 patients (36%). The diagnosis was changed from positional plagiocephaly to lambdoid synostosis in 2 patients (18%). Given the frequency and significance of radiographic abnormalities in the setting of lamboid synostosis, preoperative imaging should be considered during the operative planning phase as it can affect postoperative and intraoperative management.

  19. Radiological evaluation of pulmonary atresia: An analysis of cineangiography in 32 cases

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Dong Ho; Yeon, Kyung Mo; Park, Jae Hyung; Han, Man Chung; Yoon, Yong Soo [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    1983-06-15

    Total 32 cases of pulmonary atresia were diagnosed radiographically at Seoul National University Hospital from March, 1979 to August 1982. Some characteristic radiological findings were analyzed in chest PA and cineangiographies. The results were as follows: 1. In the evaluation of chest PA, cardiomegaly was noticed in 16 cases, dextrocardia in 8 cases, elevated cardiac apex in 7 cases and right-sided aortic arch in 6 cases. The pulmonary vascularties were mildly decreased in 20 cases, markedly decreased in 9 cases and decreased with reticular pattern in 3 cases. 2. As final diagnoses after cineangiography, pulmonary atresia was associated with Tetralogy of Fallot variant in 17 cases, transposition of great vessels in 7 cases, single ventricle in 5 cases, tricuspid atresia in 2 cases and intact ventricular septum in 1 case. 3. The classification according to the pattern of pulmonary artery is main pulmonary trunk with PDA(Type Ia) in 10 cases, pulmonary arterial confluence with PDA (Type Ib) in 10 cases, no pulmonary arterial confluence with PDA (Type Ic) in 5 cases, main pulmonary trunk without PDA (Type IIa) in 0 case, pulmonary arterial confluence without PDA (Type IIb) in 5 cases, and no pulmonary arterial confluence without PDA ( Type IIc) in 2 cases. 4. Pulmonary wedge venography was done and successful in 8 cases. Among them, confluence between right and left pulmonary arteries was noticed in 5 cases. 5. Biventricular cineangiograpy and/or pulmonary wedge venography, if necessary, is essential for the accurate diagnosis of pulmonary atresia to demonstrate detailed anatomy of pulmonary artery.

  20. Radiological evaluation of pulmonary atresia: An analysis of cineangiography in 32 cases

    International Nuclear Information System (INIS)

    Lee, Dong Ho; Yeon, Kyung Mo; Park, Jae Hyung; Han, Man Chung; Yoon, Yong Soo

    1983-01-01

    Total 32 cases of pulmonary atresia were diagnosed radiographically at Seoul National University Hospital from March, 1979 to August 1982. Some characteristic radiological findings were analyzed in chest PA and cineangiographies. The results were as follows: 1. In the evaluation of chest PA, cardiomegaly was noticed in 16 cases, dextrocardia in 8 cases, elevated cardiac apex in 7 cases and right-sided aortic arch in 6 cases. The pulmonary vascularties were mildly decreased in 20 cases, markedly decreased in 9 cases and decreased with reticular pattern in 3 cases. 2. As final diagnoses after cineangiography, pulmonary atresia was associated with Tetralogy of Fallot variant in 17 cases, transposition of great vessels in 7 cases, single ventricle in 5 cases, tricuspid atresia in 2 cases and intact ventricular septum in 1 case. 3. The classification according to the pattern of pulmonary artery is main pulmonary trunk with PDA(Type Ia) in 10 cases, pulmonary arterial confluence with PDA (Type Ib) in 10 cases, no pulmonary arterial confluence with PDA (Type Ic) in 5 cases, main pulmonary trunk without PDA (Type IIa) in 0 case, pulmonary arterial confluence without PDA (Type IIb) in 5 cases, and no pulmonary arterial confluence without PDA ( Type IIc) in 2 cases. 4. Pulmonary wedge venography was done and successful in 8 cases. Among them, confluence between right and left pulmonary arteries was noticed in 5 cases. 5. Biventricular cineangiograpy and/or pulmonary wedge venography, if necessary, is essential for the accurate diagnosis of pulmonary atresia to demonstrate detailed anatomy of pulmonary artery

  1. Pulmonary complications of liver transplantation: radiological appearance and statistical evaluation of risk factors in 300 cases

    International Nuclear Information System (INIS)

    Golfieri, R.; Giampalma, E.; D'Arienzo, P.; Maffei, M.; Muzzi, C.; Tancioni, S.; Gavelli, G.; Morselli Labate, A.M.; Sama, C.; Jovine, E.; Grazi, G.L.; Mazziotti, A.; Cavallari, A.

    2000-01-01

    The aim of this study was to evaluate the incidence, radiographic appearance, time of onset, outcome and risk factors of non-infectious and infectious pulmonary complications following liver transplantation. Chest X-ray features of 300 consecutive patients who had undergone 333 liver transplants over an 11-year period were analysed: the type of pulmonary complication, the infecting pathogens and the mean time of their occurrence are described. The main risk factors for lung infections were quantified through univariate and multivariate statistical analysis. Non-infectious pulmonary abnormalities (atelectasis and/or pleural effusion: 86.7%) and pulmonary oedema (44.7%) appeared during the first postoperative week. Infectious pneumonia was observed in 13.7%, with a mortality of 36.6%. Bacterial and viral pneumonia made up the bulk of infections (63.4 and 29.3%, respectively) followed by fungal infiltrates (24.4%). A fairly good correlation between radiological chest X-ray pattern, time of onset and the cultured microorganisms has been observed in all cases. In multivariate analysis, persistent non-infectious abnormalities and pulmonary oedema were identified as the major independent predictors of posttransplant pneumonia, followed by prolonged assisted mechanical ventilation and traditional caval anastomosis. A ''pneumonia-risk score'' was calculated: low-risk score ( 3.30) population. The ''pneumonia-risk score'' identifies a specific group of patients in whom closer radiographic monitoring is recommended. In addition, a highly significant correlation (p<0.001) was observed between pneumonia-risk score and the expected survival, thus confirming pulmonary infections as a major cause of death in OLT recipients. (orig.)

  2. Preliminary analysis of doses to evaluate the image quality in radiographic examinations in veterinary radiology

    International Nuclear Information System (INIS)

    Pinto, Ana Carolina B.C.F.; Dias, Mayara T.P.; Santos, Andrea C.; Melo, Camila S.; Furquim, Tania A.C.

    2009-01-01

    This work has as objective to promote the analysis of the radiological doses and quality of the image of the technical letter used for the accomplishment of thorax and coxal radiographic examination of animals of canine and feline species. The study was accomplished in the service of Diagnosis for Image in Veterinarian Hospital of Veterinary Medicine and Zootecnia College of University of Sao Paulo, in two conventional equipment. Initially, physical features of the animals and the technique used were collected for each one of the 188 radiographic examinations of thorax and 52 examinations of coxal. The animals were placed in different groups, according to their body weight. For each group, the averages for each feature were calculated: thickness of the radiographed region, tension, electric current, time of exhibition, current product electric-time, size of the used film, presence or absence of bucky and feature of focus (narrow or thick). On the basis of the averages of group M (of lesser weights that 5kg for cats and between 10,1kg and 20kg for dogs), was executed a physical analysis of the current technical letter, using the equipment: ionization chamber (to determinate the value of kerma in air), simulator objects (representative of the thickness of the animal) and three dispositive standards of test that evaluate space resolution, resolution in low contrast and contrast-detail. The obtained images were analyzed and compared for a physicist and a radiologist medical veterinary. The results had shown that the examinations supply dose considered high for techniques used mainly for coxal. The equipment A, although to supply higher doses, presents the better images for the majority of the projections. However, the study indicates that there are not exactly reference levels, but these examinations must pass for improvement of quality of image (author)

  3. Comparative evaluation of image quality in computed radiology systems using imaging plates with different usage time

    International Nuclear Information System (INIS)

    Lazzaro, M.V.; Luz, R.M. da; Capaverde, A.S.; Silva, A.M. Marques da

    2015-01-01

    Computed Radiology (CR) systems use imaging plates (IPs) for latent image acquisition. Taking into account the quality control (QC) of these systems, imaging plates usage time is undetermined. Different recommendations and publications on the subject suggest tests to evaluate these systems. The objective of this study is to compare the image quality of IPs of a CR system, in a mammography service, considering the usage time and consistency of assessments. 8 IPs were used divided into two groups: the first group included 4 IPs with 3 years of use (Group A); the second group consisted of 4 new IPs with no previous exposure (Group B). The tests used to assess the IP's quality were: Uniformity, Differential Signal to Noise Ratio (SDNR), Ghost Effect and Figure of Merit (FOM). Statistical results show that the proposed tests are shown efficient in assessing the conditions of image quality obtained in CR systems in mammography and can be used as determining factors for the replacement of IP's. Moreover, comparing the two sets of IP, results led to the replacement of all the set of IP’s with 3 years of use. This work demonstrates the importance of an efficient quality control, not only with regard to the quality of IP's used, but in the acquisition system as a whole. From this work, these tests will be conducted on an annual basis, already targeting as future work, monitoring the wear of IP's Group B and the creation of a baseline for analysis and future replacements. (author)

  4. Rheumatoid arthritis of the knee - radiological evaluation; Primaere chronische Polyarthritis am Kniegelenk

    Energy Technology Data Exchange (ETDEWEB)

    Rand, T. [Wien Univ. (Austria). Einrichtung fuer Magnetresonanz; Breitenseher, M. [Wien Univ. (Austria). Einrichtung fuer Magnetresonanz; Haller, J. [Hanusch Krankenhaus Wien (Austria). Abt. fuer Radiodiagnostik; Graninger, W. [Abt. fuer Innere Medizin, Univ. Wien, Ludwig Boltzmann-Inst. fuer Physikalische und Radiologische Tumordiagnostik (Austria); Imhof, H. [Wien Univ. (Austria). Einrichtung fuer Magnetresonanz; Trattnig, S. [Wien Univ. (Austria). Einrichtung fuer Magnetresonanz

    1996-08-01

    Rheumatoid arthritis is a chronic, multisystemic disease. The characteristic feature is persistent inflammatory synovitis. The knee joint is commonly involved with synovial hypertrophy, chronic effusion, and frequently ligamentous laxity. Pain and swelling behind the knee may be caused by extension of inflamed synovium into the popliteal space (Baker`s cyst). Plain radiographs of the knee joint remain the basic radiological procedure, although early in the disease they might not provide significant changes. Sonography sufficiently reveals synovial fluid and Baker cysts, but cannot be recommended for evaluation of synovial proliferations or pannus formation. Computer tomography has only limited indications and may be used for the evaluation of subtle erosive lesions or the quantitation of osteoporotic changes. Magnetic resonance imaging has shown excellent visualization of cartilage, fluid, synovium and soft tissues and is the method of choice for the demonstration of early affection and the evaluation of panus activity and therapy control. With daministration of contrast agents (gadolinium), dynamic studies may demonstrate inflammatory activity. Modern MR sequences, such as T1 SE `fat sat` or magnetization transfer, further improve the discrimination of cartilage, pannus and synovial fluid. (orig.) [Deutsch] Die chronische Polyarthritis (CP) ist eine multisystematische Erkrankung und wird charakteristischerweise von einer persistierenden inflammatorischen Synovitis begleitet. Das Kniegelenk ist das haeufigste einzeln betroffene Gelenk, seine Affektion manifestiert sich zumeist mit synovialer Hypertrophie, chronischen Erguessen und oftmals auch Bandinstabilitaet. Schmerzen sowie Schwellungen in den dorsalen Weichteilen sind oft durch Vordringen inflammatorischer Synovia oder Ergussansammlungen bedingt (Baker-Zyste). Das konventionelle Roentgenbild bildet zwar einen Grundpfeiler in der CP-Diagnostik, zeigt jedoch oft erst bei fortgeschrittenem Krankheitsverlauf

  5. Evaluation of management of communication in the actions of preparedness and response to nuclear and radiological emergencies

    Energy Technology Data Exchange (ETDEWEB)

    Mello Filho, Mauro Otto de Cavalcanti; Beserra, Marcela Tatiana Fernandes, E-mail: maurootto@cefet-rj.br, E-mail: maurootto@gmail.com, E-mail: mbeserra@cefet-rj.br [Centro Federal de Educacao Celso Sucknow da Fonseca (CEFET-RJ), Rio de Janeiro, RJ (Brazil); Wasserman, Maria Angelica Vergara, E-mail: mwasserman@ien.gov.br [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Wasserman, Julio Cesar de Faria Alvim, E-mail: geowass@vm.uff.br [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2013-07-01

    The use of practices involving the use of ionizing radiation in diverse areas of knowledge increases every day. This growth warning about the increased probability of accidents, radiological and nuclear emergencies, with possible consequences for the public, workers and the environment. Within this scenario, it is clear that studies and reassessments of the emergency response actions, receive proposals for continuous improvement. The achievement of the objectives of the response must be sustained by tactical, operation and logistics optimized processes. The articulation through communication between the teams involved in the response must be adaptable to each accident or emergency, respecting its size. The objectives of this study is to perform an assessment on the management of communication in the actions of Preparedness and Response to Nuclear and Radiological Emergencies. This assessment is supported by best practices of the Incident Command System (ICS) and the Institute of Project Management (Project Management Institute-PMI). For this purpose, based on models referred were established performance indicators supported by the BSC (Balanced Scorecard). These indicators allowed to evaluate more objectively the performance of the communication processes associated with each phase of the response. The study resulted in the proposed model documents aiming to assist planning of communications exercises in preparation and response actions, supported and adapted the best practices of PMI. These methodologies were evaluated by real cases selected from radiological and nuclear emergencies published by the International Atomic Energy Agency (IAEA). (author)

  6. Evaluation of management of communication in the actions of preparedness and response to nuclear and radiological emergencies

    International Nuclear Information System (INIS)

    Mello Filho, Mauro Otto de Cavalcanti; Beserra, Marcela Tatiana Fernandes; Wasserman, Maria Angelica Vergara; Wasserman, Julio Cesar de Faria Alvim

    2013-01-01

    The use of practices involving the use of ionizing radiation in diverse areas of knowledge increases every day. This growth warning about the increased probability of accidents, radiological and nuclear emergencies, with possible consequences for the public, workers and the environment. Within this scenario, it is clear that studies and reassessments of the emergency response actions, receive proposals for continuous improvement. The achievement of the objectives of the response must be sustained by tactical, operation and logistics optimized processes. The articulation through communication between the teams involved in the response must be adaptable to each accident or emergency, respecting its size. The objectives of this study is to perform an assessment on the management of communication in the actions of Preparedness and Response to Nuclear and Radiological Emergencies. This assessment is supported by best practices of the Incident Command System (ICS) and the Institute of Project Management (Project Management Institute-PMI). For this purpose, based on models referred were established performance indicators supported by the BSC (Balanced Scorecard). These indicators allowed to evaluate more objectively the performance of the communication processes associated with each phase of the response. The study resulted in the proposed model documents aiming to assist planning of communications exercises in preparation and response actions, supported and adapted the best practices of PMI. These methodologies were evaluated by real cases selected from radiological and nuclear emergencies published by the International Atomic Energy Agency (IAEA). (author)

  7. Radiation dose assessments to support evaluations of radiological control levels for recycling or reuse of materials and equipment

    International Nuclear Information System (INIS)

    Hill, R.L.; Aaberg, R.L.; Baker, D.A.; Kennedy, W.E. Jr.

    1995-07-01

    Pacific Northwest Laboratory is providing Environmental Protection Support and Assistance to the USDOE, Office of Environmental Guidance. Air, Water, and Radiation Division. As part of this effort, PNL is collecting data and conducting technical evaluations to support DOE analyses of the feasibility of developing radiological control levels for recycling or reuse of metals, concrete, or equipment containing residual radioactive contamination from DOE operations. The radiological control levels will be risk-based, as developed through a radiation exposure scenario and pathway analysis. The analysis will include evaluation of relevant radionuclides, potential mechanisms of exposure, and both health and non-health-related impacts. The main objective of this report is to develop a methodology for establishing radiological control levels for recycle or reuse. This report provides the results of the radiation exposure scenario and pathway analyses for 42 key radionuclides generated during DOE operations that may be contained in metals or equipment considered for either recycling or reuse. The scenarios and information developed by the IAEA. Application of Exemption Principles to the Recycle and Reuse of Materials from Nuclear Facilities, are used as the initial basis for this study. The analyses were performed for both selected worker populations at metal smelters and for the public downwind of a smelter facility. Doses to the public downwind were estimated using the US (EPA) CAP88-PC computer code with generic data on atmospheric dispersion and population density. Potential non-health-related effects of residual activity on electronics and on film were also analyzed

  8. Radiation dose assessments to support evaluations of radiological control levels for recycling or reuse of materials and equipment

    Energy Technology Data Exchange (ETDEWEB)

    Hill, R.L.; Aaberg, R.L.; Baker, D.A.; Kennedy, W.E. Jr.

    1995-07-01

    Pacific Northwest Laboratory is providing Environmental Protection Support and Assistance to the USDOE, Office of Environmental Guidance. Air, Water, and Radiation Division. As part of this effort, PNL is collecting data and conducting technical evaluations to support DOE analyses of the feasibility of developing radiological control levels for recycling or reuse of metals, concrete, or equipment containing residual radioactive contamination from DOE operations. The radiological control levels will be risk-based, as developed through a radiation exposure scenario and pathway analysis. The analysis will include evaluation of relevant radionuclides, potential mechanisms of exposure, and both health and non-health-related impacts. The main objective of this report is to develop a methodology for establishing radiological control levels for recycle or reuse. This report provides the results of the radiation exposure scenario and pathway analyses for 42 key radionuclides generated during DOE operations that may be contained in metals or equipment considered for either recycling or reuse. The scenarios and information developed by the IAEA. Application of Exemption Principles to the Recycle and Reuse of Materials from Nuclear Facilities, are used as the initial basis for this study. The analyses were performed for both selected worker populations at metal smelters and for the public downwind of a smelter facility. Doses to the public downwind were estimated using the US (EPA) CAP88-PC computer code with generic data on atmospheric dispersion and population density. Potential non-health-related effects of residual activity on electronics and on film were also analyzed.

  9. Endobronchial valves in severe emphysematous patients: CT evaluation of lung fissures completeness, treatment radiological response and quantitative emphysema analysis

    Energy Technology Data Exchange (ETDEWEB)

    Koenigkam-Santos, Marcel, E-mail: marcelk46@yahoo.com.br, E-mail: marcelk46@usp.b [Universidade de Sao Paulo (HCFMRP/USP), Ribeirao Preto, SP (Brazil). Hospital das Clinicas da Faculdade de Medicina; Paula, Wagner Diniz de [University of Brasilia (UnB), DF (Brazil). Brasilia University Hospital; Gompelmann, Daniela [University of Heidelberg (Germany). Department of Pneumology and Respiratory Medicine of the Chest Clinic (Thoraxklinik); Kauczor, Hans-Ulrich [University of Heidelberg (Germany). Department of Diagnostic and Interventional Radiology; Heussel, Claus Peter; Puderbach, Michael [University of Heidelberg (Germany). Department of Diagnostic and Interventional Radiology with Nuclear Medicine of the Chest Clinic (Thoraxklinik)

    2013-01-15

    Objective: To evaluate lung fissures completeness, post-treatment radiological response and quantitative CT analysis (QCTA) in a population of severe emphysematous patients submitted to endobronchial valves (EBV) implantation. Materials and Methods: Multi-detectors CT exams of 29 patients were studied, using thin-section low dose protocol without contrast. Two radiologists retrospectively reviewed all images in consensus; fissures completeness was estimated in 5% increments and post-EBV radiological response (target lobe atelectasis/volume loss) was evaluated. QCTA was performed in pre and post-treatment scans using a fully automated software. Results: CT response was present in 16/29 patients. In the negative CT response group, all 13 patients presented incomplete fissures, and mean oblique fissures completeness was 72.8%, against 88.3% in the other group. QCTA most significant results showed a reduced post-treatment total lung volume (LV) (mean 542 ml), reduced EBV-submitted LV (700 ml) and reduced emphysema volume (331.4 ml) in the positive response group, which also showed improved functional tests. Conclusion: EBV benefit is most likely in patients who have complete interlobar fissures and develop lobar atelectasis. In patients with no radiological response we observed a higher prevalence of incomplete fissures and a greater degree of incompleteness. The fully automated QCTA detected the post-treatment alterations, especially in the treated lung analysis. (author)

  10. The pituitary gland in patients with Langerhans cell histiocytosis: a clinical and radiological evaluation.

    Science.gov (United States)

    Kurtulmus, Neslihan; Mert, Meral; Tanakol, Refik; Yarman, Sema

    2015-04-01

    Langerhans cell histiocytosis (LCH) is a rare disease in which the most common endocrine manifestation is diabetes insipidus (DI). Data on anterior pituitary function in patients with LCH are limited. Thus, the present study investigated anterior pituitary function in LCH patients with DI via the evaluation of clinical and radiological findings at disease onset and during follow-up. The present study retrospectively evaluated nine patients with LCH (five males and four females). All diagnoses of LCH were made following histological and/or immunophenotypic analyses of tissue biopsies, bronchoalveolar lavage, or cerebrospinal fluid (CSF). Basal and, if necessary, dynamic pituitary function tests were used to assess anterior pituitary function, and magnetic resonance imaging (MRI) scans were used to image the pituitary. The LCH treatment modality was based on organ involvement. The mean age at onset of DI was 27.6 years (range 15-60 years). One patient (11%) exhibited single organ involvement, while eight patients (89%) displayed multisystem organ involvement. On admittance, one patient had hypogonadotropic hypogonadism, one patient exhibited panhypopituitarism [hypogonadotropic hypogonadism, central hypothyroidism, hypocortisolism, and growth hormone (GH) deficiency], and four patients (44%) displayed hyperprolactinemia. The MRI data revealed infundibular enlargement in seven patients (78%), a thalamic mass in one patient (11%), and the absence of the bright spot in all patients. A single patient (11%) showed a mass in the pons that had a partially empty sella. The patients were treated with radiation therapy (RT), chemotherapy (CT), or a combination of both (RT+CT) and were followed up for a median of 91.8 months (range 2-318 months). Seven patients were assessed during the follow-up period, of whom four patients (57.1%) developed anterior pituitary hormone deficiency, three (43%) were diagnosed with GH deficiency, and one (14%) exhibited gonadotropin deficiency

  11. Baseline study of radiology services for the purpose of PACS evaluation

    International Nuclear Information System (INIS)

    Mun, S.K.; Benson, H.; Welsh, C.; Elliott, L.P.; Davros, W.

    1988-01-01

    This paper reports initial results of a radiology department baseline study of workload and data flow patterns for image generation, film library activities, report generation reporting activities at the film alternators and report transcription and validation. The authors analyze the film based operations prior to full implementation of the image management and communication system. The baseline study topics are examined

  12. Economic evaluation of angiographic interventions including a whole-radiology in- and outpatient care

    International Nuclear Information System (INIS)

    Nolte-Ernsting, C.; Abel, K.; Krupski, G.; Lorenzen, J.; Adam, G.

    2006-01-01

    Purpose: To determine the economic efficiency of a whole-radiology in- and outpatient treatment with angiographic interventions performed as the main or sole therapy. Materials and Methods: The calculations represent the data of a university radiology department, including the following angiographic interventions (neuroradiology not considered): Vascular intervention (PTA, stent implantation) of kidneys and extremities, recanalization of hemodialysis access, chemoembolization, diagnostic arterioportal liver CT, port implantation, varicocele embolization, PTCD, percutaneous implantation of biliary stent. First, the different angiographic interventions are categorized with reference to the German DRG system 2005. Considering the example of a university hospital, the individual cost of each intervention is calculated and correlated with reimbursements by G-DRG2005 and so-called ''ambulant operation'' (EBM200plus). With these data, profits and losses are calculated for both in- and outpatient care. Results: Radiologic interventions of inpatients yield a profit in the majority of cases. With a base rate of 2900 Euro, the profits in our university hospital range between -872 Euro and +3411 Euro (mean: +1348 Euro). On the other hand, those angiographic interventions suitable for ''ambulant operation'' generate average profits of +372 Euro, if only direct costs are considered. The data of outpatient radiological interventions average between 381 Euro up to 1612 Euro lower than compared with profits obtained from in patient care. (orig.)

  13. Evaluating the Impact of a Canadian National Anatomy and Radiology Contouring Boot Camp for Radiation Oncology Residents

    International Nuclear Information System (INIS)

    Jaswal, Jasbir; D'Souza, Leah; Johnson, Marjorie; Tay, KengYeow; Fung, Kevin; Nichols, Anthony; Landis, Mark; Leung, Eric; Kassam, Zahra; Willmore, Katherine; D'Souza, David; Sexton, Tracy; Palma, David A.

    2015-01-01

    Background: Radiation therapy treatment planning has advanced over the past 2 decades, with increased emphasis on 3-dimensional imaging for target and organ-at-risk (OAR) delineation. Recent studies suggest a need for improved resident instruction in this area. We developed and evaluated an intensive national educational course (“boot camp”) designed to provide dedicated instruction in site-specific anatomy, radiology, and contouring using a multidisciplinary (MDT) approach. Methods: The anatomy and radiology contouring (ARC) boot camp was modeled after prior single-institution pilot studies and a needs-assessment survey. The boot camp incorporated joint lectures from radiation oncologists, anatomists, radiologists, and surgeons, with hands-on contouring instruction and small group interactive seminars using cadaveric prosections and correlative axial radiographs. Outcomes were evaluated using pretesting and posttesting, including anatomy/radiology multiple-choice questions (MCQ), timed contouring sessions (evaluated relative to a gold standard using Dice similarity metrics), and qualitative questions on satisfaction and perceived effectiveness. Analyses of pretest versus posttest scores were performed using nonparametric paired testing. Results: Twenty-nine radiation oncology residents from 10 Canadian universities participated. As part of their current training, 29%, 75%, and 21% receive anatomy, radiology, and contouring instruction, respectively. On posttest scores, the MCQ knowledge scores improved significantly (pretest mean 60% vs posttest mean 80%, P<.001). Across all contoured structures, there was a 0.20 median improvement in students' average Dice score (P<.001). For individual structures, significant Dice improvements occurred in 10 structures. Residents self-reported an improved ability to contour OARs and interpret radiographs in all anatomic sites, 92% of students found the MDT format effective for their learning, and 93% found the boot camp

  14. Evaluating the Impact of a Canadian National Anatomy and Radiology Contouring Boot Camp for Radiation Oncology Residents

    Energy Technology Data Exchange (ETDEWEB)

    Jaswal, Jasbir [Department of Radiation Oncology, London Health Sciences Centre, London, Ontario (Canada); D' Souza, Leah; Johnson, Marjorie [Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, Ontario (Canada); Tay, KengYeow [Department of Diagnostic Radiology, London Health Sciences, London, Ontario (Canada); Fung, Kevin; Nichols, Anthony [Department of Otolaryngology, Head & Neck Surgery, Victoria Hospital, London, Ontario (Canada); Landis, Mark [Department of Diagnostic Radiology, London Health Sciences, London, Ontario (Canada); Leung, Eric [Department of Radiation Oncology, London Health Sciences Centre, London, Ontario (Canada); Kassam, Zahra [Department of Diagnostic Radiology, St. Joseph' s Health Care London, London, Ontario (Canada); Willmore, Katherine [Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, Western University, London, Ontario (Canada); D' Souza, David; Sexton, Tracy [Department of Radiation Oncology, London Health Sciences Centre, London, Ontario (Canada); Palma, David A., E-mail: david.palma@lhsc.on.ca [Department of Radiation Oncology, London Health Sciences Centre, London, Ontario (Canada)

    2015-03-15

    Background: Radiation therapy treatment planning has advanced over the past 2 decades, with increased emphasis on 3-dimensional imaging for target and organ-at-risk (OAR) delineation. Recent studies suggest a need for improved resident instruction in this area. We developed and evaluated an intensive national educational course (“boot camp”) designed to provide dedicated instruction in site-specific anatomy, radiology, and contouring using a multidisciplinary (MDT) approach. Methods: The anatomy and radiology contouring (ARC) boot camp was modeled after prior single-institution pilot studies and a needs-assessment survey. The boot camp incorporated joint lectures from radiation oncologists, anatomists, radiologists, and surgeons, with hands-on contouring instruction and small group interactive seminars using cadaveric prosections and correlative axial radiographs. Outcomes were evaluated using pretesting and posttesting, including anatomy/radiology multiple-choice questions (MCQ), timed contouring sessions (evaluated relative to a gold standard using Dice similarity metrics), and qualitative questions on satisfaction and perceived effectiveness. Analyses of pretest versus posttest scores were performed using nonparametric paired testing. Results: Twenty-nine radiation oncology residents from 10 Canadian universities participated. As part of their current training, 29%, 75%, and 21% receive anatomy, radiology, and contouring instruction, respectively. On posttest scores, the MCQ knowledge scores improved significantly (pretest mean 60% vs posttest mean 80%, P<.001). Across all contoured structures, there was a 0.20 median improvement in students' average Dice score (P<.001). For individual structures, significant Dice improvements occurred in 10 structures. Residents self-reported an improved ability to contour OARs and interpret radiographs in all anatomic sites, 92% of students found the MDT format effective for their learning, and 93% found the boot camp

  15. Radiological clerkships as a critical curriculum component in radiology education

    International Nuclear Information System (INIS)

    Kourdioukova, Elena V.; Verstraete, Koenraad L.; Valcke, Martin

    2011-01-01

    Objective: The aim of this research was to explore the perceived value of clinical clerkships in the radiology curriculum as well as the impact of radiology clerkship on students' beliefs about the profession of radiology as a whole and as a career. Methods: This study is a sequel to a previous survey in which student perceptions about radiology curriculum components were investigated. The present study focuses on a further analysis of a subsection in this study, based on 14 statements about radiology clerkship and two statements about radiology as a career. Results: Perceived usefulness of the aspects of radiology clerkship as 'radiology examination', 'skills development' and 'diagnosis focus' were awarded the highest scores. The predict value of the subscale 'radiology examination' on the level of performance was very high (adjusted R 2 = 0.19, p < .001). Conclusion: Students expressed highly favorable evaluation of clerkship as a learning environment to learn to order and to interpret imaging studies as well as an unique possibility to attend various radiological examinations and to access to specific radiology software systems, as well as to get a better view on radiology and to improve image interpretation skills. This positive attitude towards clerkship is closely tied to students' beliefs about the profession of radiology as a whole. These aspects of dedicated radiology clerkship are crucial for effective and high-quality education as well as for the choice of radiology as a career.

  16. Evaluation of radiological impacts of tenorm in the Tunisian petroleum industry

    International Nuclear Information System (INIS)

    Hrichi, Hajer; Baccouche, Souad; Belgaied, Jamel-Eddine

    2013-01-01

    The health impacts associated with uncontrolled release of TENORM in products and wastes released in the petroleum industry are of great concern. In this study, evaluation of TENORM in the Tunisian petroleum products and wastes is presented. Fourteen products samples, twelve waste samples and three samples from the surrounding environment were collected from the Tunisian Refinery STIR site and from two onshore production oilfields. The activity concentrations of 232 Th, 226 Ra and 40 K for all samples were determined using gamma-ray spectrometry with High Purity Germanium (HPGe) detector. The activity concentrations of 224 Ra were calculated only for scale samples. The radium equivalent activity, external and internal hazard indices, absorbed doses rates in air and annual effective dose were also estimated. It was noticed that maximum value of Ra eq activity was found to be 398 Bq/kg in scale (w8) collected from an onshore production oilfield which exceeds the maximum Ra eq value of 370 Bq/kg recommended for safe use. All hazard indices indicated that scale samples (w6, w7, w8 and w11) could be a significant waste problem especially sample (w8). In this study, the radium isotopic data were used to provide an estimate of scale samples ages by the use of the 224 Ra/ 228 Ra activity ratio dating method. Ages of collected scales were found to be in the range 0.91–2.4 years. In this work, radioactivity (NORM contamination) in samples collected from the refinery STIR are showed to be insignificant if compared to those from onshore oilfield production sites. - Highlights: ► We followed 232 Th, 226 Ra and 40 K concentrations in Tunisian petroleum products and wastes. ► Radium isotopic data were used to estimate the age of scales deposited in the petroleum production equipments. ► Samples collected from refinery installation did not represent radiological risk. ► Scale samples collected from oil fields installation exceeded UNSCEAR rules.

  17. Evaluation and assessment methodology, standards, and procedures manual of the United States Federal Radiological Monitoring and Assessment Center

    International Nuclear Information System (INIS)

    Kerns, K.C.; Burson, Z.G.; Smith, J.M.; Blanchard, R.L.

    2000-01-01

    In the event of a major radiological emergency, the U.S. Federal Radiological Emergency Response Plan authorises the creation of the Federal Radiological Monitoring and Assessment Center (FRMAC). The FRMAC is established to co-ordinate the Federal off-site monitoring and assessment activities, and is comprised of representatives from several Federal agencies and Department of Energy contractors who provide assistance to the state(s) and Lead Federal Agency. The Evaluation and Assessment (E and A) Division of the FRMAC is responsible for receiving, storing, and interpreting environmental surveillance data to estimate the potential health consequences to the population in the vicinity of the accident site. The E and A Division has commissioned the preparation of a methodology and procedures manual which will result in a consistent approach by Division members in carrying out their duties. The first edition of this manual is nearing completion. In this paper, a brief review of the structure of the FRMAC is presented, with emphasis on the E and A Division. The contents of the E and A manual are briefly described, as are future plans for its expansion. (author)

  18. Preparation, conduct and evaluation of exercises to test preparedness for a nuclear or radiological emergency. Emergency preparedness and response

    International Nuclear Information System (INIS)

    2005-04-01

    The aim of this publication is to serve as a practical tool for the preparation, conduct and evaluation of exercises to test preparedness for response to a nuclear or radiological emergency. It fulfils in part the functions assigned to the IAEA under Article 5.a(ii) of the Convention on Assistance in Case of a Nuclear Accident or Radiological Emergency (Assistance Convention), namely, to collect and disseminate to States Parties and Member States information concerning the methodologies, techniques and available results of research on such emergencies. To ensure effective response to radiation emergencies when needed, provisions should be made for regular training of emergency response personnel. As stated in Preparedness and Response for a Nuclear or Radiological Emergency (Safety Requirements, Safety Standard Series No. GS-R-2), 'The operator and the response organizations shall make arrangements for the selection of personnel and training to ensure that the personnel have the requisite knowledge, skills, abilities, equipment, procedures and other arrangements to perform their assigned response functions'. A further requirement is that 'Exercise programmes shall be conducted to ensure that all specified functions required to be performed for emergency response and all organizational interfaces for facilities in threat category I, II or III and the national level programmes for threat category IV or V are tested at suitable intervals'. In 2004 the IAEA General Conference, in resolution GC(48)/RES/10 encouraged Member States to 'implement the Safety Requirements for Preparedness and Response to a Nuclear or Radiological Emergency'. This document is published as part of the IAEA Emergency Preparedness and Response Series to assist in meeting these requirements and to fulfil Article 5 of the Assistance Convention. It was developed based on a number of assumptions about national and local capabilities. Therefore, the exercise structure, terms and scenarios must be

  19. Preoperative evaluation of hepatic arterial and portal venous anatomy using the time resolved echo-shared MR angiographic technique in living liver donors

    International Nuclear Information System (INIS)

    Lee, Min Woo; Lee, Jeong Min; Lee, Jae Young; Kim, Se Hyung; Park, Eun-Ah; Han, Joon Koo; Choi, Jin-Young; Choi, Byung Ihn; Kim, Young Jun; Suh, Kyung-Suk

    2007-01-01

    The purpose of this study was to determine whether MR angiography utilizing the time resolved echo-shared angiographic technique (TREAT) can provide an effective assessment of the hepatic artery (HA) and portal vein (PV) in living donor candidates. MR angiography (MRA)was performed in 27 patients (23 men and 4 women; mean age, 31 years) by using TREAT. Two blinded radiologists evaluated HA anatomy, origin of segment IV feeding artery and PV anatomy in consensus. Qualitative evaluations of MRA images were performed using the following criteria: (a) overall image quality, (b) presence of artifacts, and (c) degree of venous contamination of the arterial phase. Using intraoperative findings as a standard of reference, the accuracy for the HA anatomy, origin of segment IV feeding artery and PV anatomy on TREAT-MRA were 93% (25/27), 85% (23/27), and 96% (26/27), respectively. Overall image qualities were as follows: excellent (n=22, 81%), good (n=4, 15%), and fair (n=1, 4%). Significant artifacts or venous contamination of the arterial phase images was not noted in any patient. TREAT-MRA can provide a complete evaluation of HA and PV anatomy during preoperative evaluation of living liver donors. Furthermore, it provides a more detailed anatomy of the HA without venous contamination. (orig.)

  20. The value of FDG positron emission tomography/computerised tomography (PET/CT) in pre-operative staging of colorectal cancer: a systematic review and economic evaluation.

    Science.gov (United States)

    Brush, J; Boyd, K; Chappell, F; Crawford, F; Dozier, M; Fenwick, E; Glanville, J; McIntosh, H; Renehan, A; Weller, D; Dunlop, M

    2011-09-01

    In the UK, colorectal cancer (CRC) is the third most common malignancy (behind lung and breast cancer) with 37,514 cases registered in 2006: around two-thirds (23,384) in the colon and one-third (14,130) in the rectum. Treatment of cancers of the colon can vary considerably, but surgical resection is the mainstay of treatment for curative intent. Following surgical resection, there is a comprehensive assessment of the tumour, it's invasion characteristics and spread (tumour staging). A number of imaging modalities are used in the pre-operative staging of CRCs including; computerised tomography (CT), magnetic resonance imaging, ultrasound imaging and positron emission tomography (PET). This report examines the role of CT in combination with PET scanning (PET/CT 'hybrid' scan). The research objectives are: to evaluate the diagnostic accuracy and therapeutic impact of fluorine-18-deoxyglucose (FDG) PET/CT for the pre-operative staging of primary, recurrent and metastatic cancer using systematic review methods; undertake probabilistic decision-analytic modelling (using Monte Carlo simulation); and conduct a value of information analysis to help inform whether or not there is potential worth in undertaking further research. For each aspect of the research - the systematic review, the handsearch study and the economic evaluation - a database was assembled from a comprehensive search for published and unpublished studies, which included database searches, reference lists search and contact with experts. In the systematic review prospective and retrospective patient series (diagnostic cohort) and randomised controlled trials (RCTs) were eligible for inclusion. Both consecutive series and series that are not explicitly reported as consecutive were included. Two reviewers extracted all data and applied the criteria independently and resolved disagreements by discussion. Data to populate 2 × 2 contingency tables consisting of the number of true positives, true negatives

  1. Additional value of diffusion-weighted imaging to evaluate multifocal and multicentric breast cancer detected using pre-operative breast MRI

    Energy Technology Data Exchange (ETDEWEB)

    Song, Sung Eun; Park, Eun Kyung; Cho, Kyu Ran; Cho, Sung Bum [Korea University Anam Hospital, Korea University College of Medicine, Department of Radiology, Seoul (Korea, Republic of); Seo, Bo Kyoung [Korea University Ansan Hospital, Korea University College of Medicine, Department of Radiology, Ansan (Korea, Republic of); Woo, Ok Hee [Korea University Guro Hospital, Korea University College of Medicine, Department of Radiology, Seoul (Korea, Republic of); Jung, Seung Pil [Korea University Anam Hospital, Korea University College of Medicine, Department of Surgery, Seoul (Korea, Republic of)

    2017-11-15

    To investigate whether diffusion-weighted imaging (DWI) aids pre-operative dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) to evaluate additional lesions in breast cancer patients. DCE-MRI and DWI were performed on 131 lesions, with available histopathological results. The apparent diffusion coefficient (ADC) of each lesion was measured, and the cut-off value for differentiation between malignant and benign lesions was calculated. A protocol combining the ADC cut-off value with DCE-MRI was validated in a cohort of 107 lesions in 77 patients. When an ADC cut-off value of 1.11 x 10{sup -3} mm{sup 2}/s from the development cohort was applied to the additional lesions in the validation cohort, the specificity increased from 18.9% to 67.6% (P < 0.001), and the diagnostic accuracy increased from 61.7% to 82.2% (P = 0.05), without significant loss of sensitivity (98.6% vs. 90.0%, P = 0.07). The negative predictive values of lesions in the same quadrant had decreased, as had those of lesions ≥1 cm in diameter. The ADC cut-off value in the validation cohort was 1.05 x 10{sup -3} mm{sup 2}/s. Additional implementation of DWI for breast lesions in pre-operative MRI can help to obviate unnecessary biopsies by increasing specificity. However, to avoid missing cancers, clinicians should closely monitor lesions located in the same quadrant or lesions ≥1 cm. (orig.)

  2. CT fluoroscopy-guided preoperative short hook wire placement for small pulmonary lesions: evaluation of safety and identification of risk factors for pneumothorax.

    Science.gov (United States)

    Iguchi, Toshihiro; Hiraki, Takao; Gobara, Hideo; Fujiwara, Hiroyasu; Matsui, Yusuke; Miyoshi, Shinichiro; Kanazawa, Susumu

    2016-01-01

    To retrospectively evaluate the safety of computed tomography (CT) fluoroscopy-guided short hook wire placement for video-assisted thoracoscopic surgery and the risk factors for pneumothorax associated with this procedure. We analyzed 267 short hook wire placements for 267 pulmonary lesions (mean diameter, 9.9 mm). Multiple variables related to the patients, lesions, and procedures were assessed to determine the risk factors for pneumothorax. Complications (219 grade 1 and 4 grade 2 adverse events) occurred in 196 procedures. No grade 3 or above adverse events were observed. Univariate analysis revealed increased vital capacity (odds ratio [OR], 1.518; P = 0.021), lower lobe lesion (OR, 2.343; P =0.001), solid lesion (OR, 1.845; P = 0.014), prone positioning (OR, 1.793; P = 0.021), transfissural approach (OR, 11.941; P = 0.017), and longer procedure time (OR, 1.036; P = 0.038) were significant predictors of pneumothorax. Multivariate analysis revealed only the transfissural approach (OR, 12.171; P = 0.018) and a longer procedure time (OR, 1.048; P = 0.012) as significant independent predictors. Complications related to CT fluoroscopy-guided preoperative short hook wire placement often occurred, but all complications were minor. A transfissural approach and longer procedure time were significant independent predictors of pneumothorax. Complications related to CT fluoroscopy-guided preoperative short hook wire