WorldWideScience

Sample records for anterior rib masquerading

  1. Giant Cell Tumor of Rib Arising Anteriorly as a Large Inframammary Mass: A Case Report and Review of the Literature

    Directory of Open Access Journals (Sweden)

    Amit Sharma

    2012-01-01

    posteriorly. The rarity of this tumor poses diagnostic and therapeutic problems for physicians, especially when it is located in the anterior arc of the rib in close proximity to the breasts in female patients. Case Presentation. We report the case of a 32-year-old Asian female with a giant cell tumor of her anterior rib, presenting as a large inframammary mass. Computed tomography showed a tumor arising from the 7th rib anteriorly with marginal sclerosis, cortical destruction, and a soft tissue mass. She was treated with surgical resection, and the defect was reconstructed primarily. The surgical specimen measured 28.0 × 24.0 cm. The microscopic examination showed a large number of multinucleate giant cells scattered over the parenchyma. Patient recovered uneventfully and continues to be recurrence-free six years after surgical resection. Conclusion. We report the largest known case of giant cell tumor arising from the anterior aspect of a rib. We recommend including giant cell tumor in the differential diagnosis of chest wall masses especially in female patients, regardless of the size on clinical examination.

  2. Dedifferentiated Chondrosarcoma of the Rib Masquerading as a Giant Chest Wall Tumor in a Teenage Girl: An Unusual Presentation

    OpenAIRE

    Abraham, Viju Joseph; Devgarha, Sanjeev; Mathur, Rajendra Mohan; Sisodia, Anula; Yadav, Amita

    2014-01-01

    Chondrosarcoma of the chest wall is a rare primary neoplasm found to occur in elderly men. Patients present with an enlarging, painful, anterior chest wall mass arising from either the vicinity of the costochondral junction or the sternum. Treatment includes wide resection with appropriate chest wall reconstruction. We report an unusual presentation of this uncommon tumor occurring as a huge chest wall mass in a young teenage girl.

  3. A STUDY OF 34 CASES OF POTT’S PARAPLEGIA WITH ANTERIOR SPINAL DECOMPRESSION & STABILISATION WITH RIB GRAFT ALONE

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    Ravindranath

    2015-03-01

    Full Text Available BACKGROUND: Spinal tuberculosis is mostly secondary to either Pulmonary or Abdominal lesions , and may result in Paraplegia either due to pressure effects of the cold abscess or due to collapse of the vertebra . Most of the patients with Grade I and II paraparesis respond well to chemotherapy , while Grade III and IV patients and some of the patients in Grade I and II who do not respond to chemotherapy need Spinal decompression to prevent irreparable damage to the Spinal cord . MATERIAL S AND METHODS: This study comprises 34 patients in Grade III and IV paraplegia who did not respond to 3 - 4 weeks of chemotherapy and rest or deteriorated during treatment . They were treated by anterior trans - thorasic and trans - pleural spinal decompression by partial or total carpectomy depending on the extent of involvement of the bodies and anterior spinal fusion using rib graft alone , during the period F eb . 2007 to May 2013 , in Government General and Chest hospital , Osmania Medical College , Hyderabad . RESULTS: Out of 34 patients complete neurological recovery was seen in 32 patients , 1 patient had partial recovery while 1 patient died of post - operative complications . CONCLUSIONS: Anterior spinal decompression and stabilization using rib graft alone is a good choice of surgical treatment in terms of neurological recovery , healing of the lesion , and is a cost - effective treatment option for the patient . Post - operative rehabilitation is also early .

  4. Iatrogenic aortic pseudoaneurysm following anterior thoracic spine surgery masquerading as chronic infection

    OpenAIRE

    Goni Vijay; Bahl Ajay; Gopinathan Nirmal Raj; Krishnan Vibhu; Kumar Rajesh

    2013-01-01

    【Abstract】Late vascular complications involving aorta are rare but devastating adversities following anterior thoracic spine operations are present. The current article describes our experience with one such patient who had an iatrogenic pseudoaneurysm of the thoracic aorta, mimick- ing infection. The patient was treated successfully follow- ing concomitant efforts by multidisciplinary experts with shunting. We wish to highlight upon the significance of recognizing the...

  5. latrogenic aortic pseudoaneurysm following anterior thoracic spine surgery masquerading as chronic infection

    Institute of Scientific and Technical Information of China (English)

    Vijay Goni; Ajay Bahl; Nirmal Raj Gopinathan; Vibhu Krishnan; Rajesh Kumar

    2013-01-01

    Late vascular complications involving aorta are rare but devastating adversities following anterior thoracic spine operations are present.The current article describes our experience with one such patient who had an iatrogenic pseudoaneurysm of the thoracic aorta,mimicking infection.The patient was treated successfully following concomitant efforts by multidisciplinary experts with shunting.We wish to highlight upon the significance of recognizing the possible sinister consequences of a dangerously prominent spinal implant and the role of a suspicious surgeon in identifying these menacing complications at the right time.

  6. Cutaneous metastasis of medullary carcinoma thyroid masquerading as subcutaneous nodules anterior chest and mandibular region.

    Science.gov (United States)

    Mannan, Rahul; Kaur, Jasmine; Kaur, Jasleen; Piplani, Sanjay; Kaur, Harjot; Kaur, Harleen

    2014-01-01

    Cutaneous metastasis of underlying primary malignancies can present to dermatologist with chief complaints of cutaneous lesions. The underlying malignancy is generally diagnosed much later after a complete assessment of the concerned case. Medullary carcinoma thyroid (MCT) is a relatively uncommon primary neoplasia of the thyroid. Very few cases presenting as cutaneous metastases of MCT have been reported in the literature. Most of the cases which have been reported are of the papillary and the follicular types. We here report a case of a patient who presented in the dermatology clinic with the primary complaint of multiple subcutaneous nodules in anterior chest wall and left side of body of mandible. By systematic application of clinical and diagnostic skills these nodules were diagnosed as cutaneous metastasis of MCT bringing to the forefront a history of previously operated thyroid neoplasm. So clinically, the investigation of a flesh coloured subcutaneous nodule, presenting with a short duration, particularly in scalp, jaw, or anterior chest wall should include possibility of metastastic deposits. A dermatologist should keep a possibility of an internal organ malignancy in patients while investigating a case of flesh coloured subcutaneous nodules, presenting with short duration. A systematic application of clinical and diagnostic skills will eventually lead to such a diagnosis even when not suspected clinically at its primary presentation. A prompt and an emphatic diagnosis and treatment will have its bearing on the eventual outcome in all these patients. PMID:25478248

  7. Cutaneous Metastasis of Medullary Carcinoma Thyroid Masquerading as Subcutaneous Nodules Anterior Chest and Mandibular Region

    Directory of Open Access Journals (Sweden)

    Rahul Mannan

    2014-01-01

    Full Text Available Cutaneous metastasis of underlying primary malignancies can present to dermatologist with chief complaints of cutaneous lesions. The underlying malignancy is generally diagnosed much later after a complete assessment of the concerned case. Medullary carcinoma thyroid (MCT is a relatively uncommon primary neoplasia of the thyroid. Very few cases presenting as cutaneous metastases of MCT have been reported in the literature. Most of the cases which have been reported are of the papillary and the follicular types. We here report a case of a patient who presented in the dermatology clinic with the primary complaint of multiple subcutaneous nodules in anterior chest wall and left side of body of mandible. By systematic application of clinical and diagnostic skills these nodules were diagnosed as cutaneous metastasis of MCT bringing to the forefront a history of previously operated thyroid neoplasm. So clinically, the investigation of a flesh coloured subcutaneous nodule, presenting with a short duration, particularly in scalp, jaw, or anterior chest wall should include possibility of metastastic deposits. A dermatologist should keep a possibility of an internal organ malignancy in patients while investigating a case of flesh coloured subcutaneous nodules, presenting with short duration. A systematic application of clinical and diagnostic skills will eventually lead to such a diagnosis even when not suspected clinically at its primary presentation. A prompt and an emphatic diagnosis and treatment will have its bearing on the eventual outcome in all these patients.

  8. Midfoot reconstruction with serratus anterior-rib osteomuscular free flap following oncological resection of synovial sarcoma.

    Science.gov (United States)

    Battiston, Bruno; Artiaco, Stefano; Piana, Raimondo; Boux, Elena; Tos, Pierluigi

    2015-12-01

    During recent decades, the concept of surgical treatment of malignant bone and soft tissue sarcomas has evolved, with the aim of preserving limb function. In this paper we report a case of metatarsal reconstruction by means of serratus and rib free flap after excision of a synovial sarcoma located in the dorsal aspect of the midfoot. Five years after the operation, the patient was free from recurrence and recovered full foot function. Amputation has been widely used in the past and this procedure still remains a valuable option when limb salvage is not possible. Nevertheless, in selected cases, reconstruction by means of composite free flaps may be successfully used for limb preservation in the treatment of malignant foot tumors after surgical excision. PMID:25838161

  9. Rib Fractures

    Science.gov (United States)

    ... 2 Diabetes, Heart Disease a Dangerous Combo Are 'Workaholics' Prone to OCD, Anxiety? ALL NEWS > Resources First ... Rib Fractures Traumatic Pneumothorax Tension Pneumothorax Rib fractures cause severe pain, particularly when a person breathes deeply. ...

  10. Ribbing disease

    International Nuclear Information System (INIS)

    Ribbing disease is a rare sclerosing dysplasia that involves long tubular bones, especially the tibia and femur. It occurs after puberty and is reported to be more common in women. In this article we describe how Ribbing disease can be differentiated from diseases like Engelmann-Camurati disease, van Buchem disease, Erdheim-Chester disease, osteoid osteoma, chronic osteomyelitis, stress fracture, etc

  11. Ribbing disease

    Directory of Open Access Journals (Sweden)

    Mukkada Philson

    2010-01-01

    Full Text Available Ribbing disease is a rare sclerosing dysplasia that involves long tubular bones, especially the tibia and femur. It occurs after puberty and is reported to be more common in women. In this article we describe how Ribbing disease can be differentiated from diseases like Engelmann-Camurati disease, van Buchem disease, Erdheim-Chester disease, osteoid osteoma, chronic osteomyelitis, stress fracture, etc.

  12. Cryptococcal osteomyelitis in the ribs

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    Sethi Somika

    2010-01-01

    Full Text Available Isolated cryptococcal osteomyelitis, in an immunocompetent, is rare and only a few cases have been reported in literature. We present the case of a 30-year-old man presented with pain on the left side of chest with fever and gradually increasing swelling in left lateral lower aspect of chest. Investigation revealed a lytic lesion in the anterior end of left 6 th rib with normal CD4 count. He was tested negative for HIV antigen. Excision of the sixth rib, morphologically revealed cryptococcal osteomyelitis and the patient was given anti-fungal treatment for six months.

  13. Segmentation of ribs in digital chest radiographs

    Science.gov (United States)

    Cong, Lin; Guo, Wei; Li, Qiang

    2016-03-01

    Ribs and clavicles in posterior-anterior (PA) digital chest radiographs often overlap with lung abnormalities such as nodules, and cause missing of these abnormalities, it is therefore necessary to remove or reduce the ribs in chest radiographs. The purpose of this study was to develop a fully automated algorithm to segment ribs within lung area in digital radiography (DR) for removal of the ribs. The rib segmentation algorithm consists of three steps. Firstly, a radiograph was pre-processed for contrast adjustment and noise removal; second, generalized Hough transform was employed to localize the lower boundary of the ribs. In the third step, a novel bilateral dynamic programming algorithm was used to accurately segment the upper and lower boundaries of ribs simultaneously. The width of the ribs and the smoothness of the rib boundaries were incorporated in the cost function of the bilateral dynamic programming for obtaining consistent results for the upper and lower boundaries. Our database consisted of 93 DR images, including, respectively, 23 and 70 images acquired with a DR system from Shanghai United-Imaging Healthcare Co. and from GE Healthcare Co. The rib localization algorithm achieved a sensitivity of 98.2% with 0.1 false positives per image. The accuracy of the detected ribs was further evaluated subjectively in 3 levels: "1", good; "2", acceptable; "3", poor. The percentages of good, acceptable, and poor segmentation results were 91.1%, 7.2%, and 1.7%, respectively. Our algorithm can obtain good segmentation results for ribs in chest radiography and would be useful for rib reduction in our future study.

  14. Ojionu Masquerade: Spirit Incarnate in Performance

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    L. O. Molinta Enendu

    2014-12-01

    Full Text Available This paper examines one of the most fascinating social masquerade institutions in Igbo culture, in Nigeria. The masquerade institution is seen as an anthropological continuum, manifesting in the people’s long tradition of developed performance and festivities. The Ojionu masquerade, as an example of one of such numerous dynamic and virile masquerades, is studied as a spirit incarnate. The essence and spirituality of the masquerade; the masquerade’s physical being and aesthetics; the thrilling, exciting and vibrant performance of the Ojionu masquerade, supported by pulsating rhythmic music; the organization and management of the Ojionu masquerade, as an example of an indigenous communal cultic institution, are studied and delineated upon. The research adapts and benefits from a “source study” based on personal interviews and the writer’s privileged eye-witness account. It is significant to note that, the Ojionu masquerade, is often seen, perhaps, as the highest realms of entertainment for social occasion from a spiritually profound incarnate. The popularity and acceptability of the Ojionu masquerade remained stubbornly insuppressible aspect of the people’s cultural entertainment despite the eroding and crushing influences of foreign cultures and, the unpopular and obnoxious anti-masquerade legislations by local and municipal governments and, above all, that of the orthodox foreign Eurocentric religious doctrines who refer to masquerade groups as “a congregation of Satan”.

  15. Pyoderma gangrenosum masquerading as Donovanosis

    OpenAIRE

    Pai, Varadraj V; Naveen Narayanshetty Kikkeri; S B Athanikar; Anil Myageri; Vijetha Rai

    2014-01-01

    Pyoderma gangrenosum (PG) is a rare inflammatory disorder of unknown etiology characterized by neutrophilic infiltration of the dermis and destruction of tissue. PG is diagnosed after excluding more commonly occurring condition presenting with similar manifestation. Though PG has been reported to occur over the genitalia, it rarely presents with concurrent involvement of the groin. Herein, we present a case of PG masquerading as Donovanosis.

  16. Pyoderma gangrenosum masquerading as Donovanosis

    Directory of Open Access Journals (Sweden)

    Varadraj V Pai

    2014-01-01

    Full Text Available Pyoderma gangrenosum (PG is a rare inflammatory disorder of unknown etiology characterized by neutrophilic infiltration of the dermis and destruction of tissue. PG is diagnosed after excluding more commonly occurring condition presenting with similar manifestation. Though PG has been reported to occur over the genitalia, it rarely presents with concurrent involvement of the groin. Herein, we present a case of PG masquerading as Donovanosis.

  17. Homicidal hanging masquerading as suicide

    DEFF Research Database (Denmark)

    Leth, Peter Mygind; Charles, Annie Vesterby

    1997-01-01

    Homicidal hanging is rare and presents special problems for the forensic pathologist. We report a case of homicide by hanging masquerading as suicide, in which the forensic evidence was of crucial importance. The victim was a 61 years old man, who was found in his house suspended by a rope around...... the opinion that the deceased was alive and not dead at the time of the hanging. The estimation of the time of death was of great importance, as only one other person could have been present at the estimated time interval. This person was later sentenced to prison for manslaughter....

  18. Morphometric analysis of variation in the ribs with age and sex.

    Science.gov (United States)

    Weaver, Ashley A; Schoell, Samantha L; Stitzel, Joel D

    2014-08-01

    Rib cage morphology changes with age and sex are expected to affect thoracic injury mechanisms and tolerance, particularly for vulnerable populations such as pediatrics and the elderly. The size and shape variation of the external geometry of the ribs was characterized for males and females aged 0-100 years. Computed tomography (CT) scans from 339 subjects were analyzed to collect between 2700 and 10 400 homologous landmarks from each rib. Rib landmarks were analyzed using the geometric morphometric technique known as Procrustes superimposition. Age- and sex-specific functions of 3D rib morphology were produced representing the combined size and shape variation and the isolated shape variation. Statistically significant changes in the size and shape variation (P < 0.0001) and shape variation (P < 0.0053) of all 24 ribs were found to occur with age in males and females. Rib geometry, location, and orientation varied according to the rib level. From birth through adolescence, the rib cage experienced an increase in size, a decrease in thoracic kyphosis, and inferior rotation of the ribs relative to the spine within the sagittal plane. From young adulthood into elderly age, the rib cage experienced increased thoracic kyphosis and superior rotation of the ribs relative to the spine within the sagittal plane. The increased roundedness of the rib cage and horizontal angling of the ribs relative to the spine with age influences the biomechanical response of the thorax. With the plane of the rib oriented more horizontally, loading applied in the anterior-posterior direction will result in increased deformation within the plane of the rib and an increased risk for rib fractures. Thus, morphological changes may be a contributing factor to the increased incidence of rib fractures in the elderly. The morphological functions derived in this study capture substantially more information on thoracic skeleton morphology variation with age and sex than is currently available

  19. Morphometric analysis of variation in the ribs with age and sex

    Science.gov (United States)

    Weaver, Ashley A; Schoell, Samantha L; Stitzel, Joel D

    2014-01-01

    Rib cage morphology changes with age and sex are expected to affect thoracic injury mechanisms and tolerance, particularly for vulnerable populations such as pediatrics and the elderly. The size and shape variation of the external geometry of the ribs was characterized for males and females aged 0–100 years. Computed tomography (CT) scans from 339 subjects were analyzed to collect between 2700 and 10 400 homologous landmarks from each rib. Rib landmarks were analyzed using the geometric morphometric technique known as Procrustes superimposition. Age- and sex-specific functions of 3D rib morphology were produced representing the combined size and shape variation and the isolated shape variation. Statistically significant changes in the size and shape variation (P < 0.0001) and shape variation (P < 0.0053) of all 24 ribs were found to occur with age in males and females. Rib geometry, location, and orientation varied according to the rib level. From birth through adolescence, the rib cage experienced an increase in size, a decrease in thoracic kyphosis, and inferior rotation of the ribs relative to the spine within the sagittal plane. From young adulthood into elderly age, the rib cage experienced increased thoracic kyphosis and superior rotation of the ribs relative to the spine within the sagittal plane. The increased roundedness of the rib cage and horizontal angling of the ribs relative to the spine with age influences the biomechanical response of the thorax. With the plane of the rib oriented more horizontally, loading applied in the anterior-posterior direction will result in increased deformation within the plane of the rib and an increased risk for rib fractures. Thus, morphological changes may be a contributing factor to the increased incidence of rib fractures in the elderly. The morphological functions derived in this study capture substantially more information on thoracic skeleton morphology variation with age and sex than is currently available in

  20. Synostosis of first and second thoracic ribs: Anatomical and radiological assessment

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    Gupta V

    2009-10-01

    Full Text Available An unusual specimen showing synostosis of left sided first and second ribs was encountered during scanning of bones in anatomy department. The ribs were partially fused in the region of their neck and tubercles, and displayed an osseous tunnel. The tunnel measured 1.2 cm in length and was directed anterolaterally. The shaft of first rib imperceptibly blended with that of the second and resulted in obliteration of first intercostal space. The maximum width of this conjoint shaft was 3.6 cm. Superior surface of the rib specimen was marked by a large muscular impression for scalenus medius muscle. The groove for subclavian artery on the superior surface of first rib was prominent. The anterior end of the second rib and a portion of its shaft were separated from the anterior end of first rib by a V-shaped notch. The radiograph of the specimen confirmed the presence of a tunnel between the fused portions of neck and tubercle. Such skeletal abnormalities may be associated with segmentation defects of bony tissues and variations in the disposition of neurovascular structures, thus rendering them vulnerable to compression at the thoracic outlet. The fused ribs affect the chest wall expansion and may result in respiratory complications. Precise knowledge and awareness of such anomalies is important for clinicians, especially for thoracic surgeons and radiologists.

  1. Rib fracture: Different radiographic projections

    International Nuclear Information System (INIS)

    Rib fracture is the most common thoracic injury. It is thought to be present in 10% of all traumatic injuries and in almost 40% of patients who sustained severe non-penetrating trauma. There are 12 pairs of ribs. This study reviews various methods of acquisition and reconstruction of radiographic images of traumatic rib fractures in order to determine the optimal views and to simplify rib fracture diagnostics. Eight different plain radiography pictures of ribs were performed with the patient in an erect position. The following projections were obtained in sequence: oblique at 45° or 30° angle on inspiration, oblique at 45° or 30° angle on expiration as well as 45° and 39° projections during slow and fast breathing. All radiographic examinations were performed using a Philips three-phase scanner installed at the Al- Razi Hospital in Jenin, Palestine. The results demonstrate that the 45° antero-posterior oblique projection performed on expiration is recommended for diagnostics and interpretation of traumatic rib fractures. Conclusion emerging from this study are such that for a 45° oblique view on expiration is recommended for radiographic imaging of patients with clinical signs of fracture, e.g. evaluation of lower rib fractures, while 45° oblique view during fast breathing is recommended for suspected upper rib fractures

  2. Neurofibromatosis with ribs meningiomas: a case report; Neurofibromatose com meningeomas costais: relato de um caso

    Energy Technology Data Exchange (ETDEWEB)

    Henrique, Katia; Magalhaes Junior, Mauricio Ricardo; Cardenas, Gloria Pamela Galdames [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Faculdade de Medicina. Hospital Universitario Antonio Pedro; Marchiori, Edson [Universidade Federal Fluminense, Niteroi, RJ (Brazil). Faculdade de Medicina. Dept. de Radiologia

    1996-03-01

    This work shows one case of ribs meningiomas in a 31-year-old male patient who presented a painful and toughened mass of undefined limits, which was located in the level of the third and fourth left anterior ribs. The problem has developed with an increase of the tumoration, more pain and dyspnea appearance. The patient present cafe-au-lait spots on all his body and a familiar neurofibromatosis had been reported. After radiological exams, the patient has been submitted to an exploratory thoracotomy, with a parietal mass resection, what resulted in a histopathological diagnosis of ribs meningiomas. (author). 7 refs., 3 figs.

  3. IP MASQUERADING: A Network Address Translation Technique

    OpenAIRE

    Chiranji Lal Chowdhary; Prashant P.J.

    2010-01-01

    IP Masquerade, called "IPMASQ" or "MASQ" for short, is a form of Network Address Translation (NAT) which allows internally connected computers that do not have one or more registered Internet IP addresses to communicate to the Internet via the server's Internet IP address. Since IPMASQ is a generic technology, you can connect the server's internal and external to other computers through LAN technologies like Ethernet, Token Ring, and FDDI, as well as dialup connections line PPP or SLIP links....

  4. Securing iris recognition systems against masquerade attacks

    OpenAIRE

    Galbally Herrero, Javier; Gómez-Barrero, Marta; Ross, Arun A.; Fiérrez, Julián; Ortega-García, Javier

    2013-01-01

    Javier Galbally ; Marta Gomez-Barrero ; Arun Ross ; Julian Fierrez ; Javier Ortega-Garcia; "Securing iris recognition systems against masquerade attacks", Biometric and Surveillance Technology for Human and Activity Identification X, Proc. SPIE 8712 (May 31, 2013); doi:10.1117/12.2015690. Copyright 2013 Society of Photo‑Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in...

  5. Intrahepatic Cholangiocarcinoma Masquerading as Liver Abscess

    Science.gov (United States)

    Shah, Vinit; Arora, Anil; Tyagi, Pankaj; Sharma, Praveen; Bansal, Naresh; Singla, Vikas; Bansal, Rinkesh K.; Gupta, Varun; Kumar, Ashish

    2015-01-01

    Malignancy masquerading as liver abscess, and presenting with fever, is mainly described in patients with colorectal cancers with liver metastasis. Primary liver tumors such as hepatocellular carcinoma or intrahepatic cholangiocarcinoma presenting as non-resolving liver abscess is extremely uncommon and carries a dismal prognosis. We present a rare case of non-resolving liver abscess as a presenting manifestation of intrahepatic cholangiocarcinoma. PMID:25941437

  6. Securing iris recognition systems against masquerade attacks

    Science.gov (United States)

    Galbally, Javier; Gomez-Barrero, Marta; Ross, Arun; Fierrez, Julian; Ortega-Garcia, Javier

    2013-05-01

    A novel two-stage protection scheme for automatic iris recognition systems against masquerade attacks carried out with synthetically reconstructed iris images is presented. The method uses different characteristics of real iris images to differentiate them from the synthetic ones, thereby addressing important security flaws detected in state-of-the-art commercial systems. Experiments are carried out on the publicly available Biosecure Database and demonstrate the efficacy of the proposed security enhancing approach.

  7. Influence of ribs on train aerodynamic performances

    Institute of Scientific and Technical Information of China (English)

    MIAO Xiu-juan; GAO Guang-jun

    2015-01-01

    The influence of ribs on the train aerodynamic performance was computed using detached eddy simulation (DES), and the transient iteration was solved by the dual-time step lower-upper symmetric Gauss-Seidel (LU-SGS) method. The results show that the ribs installed on the roof have a great effect on the train aerodynamic performance. Compared with trains without ribs, the lift force coefficient of the train with convex ribs changes from negative to positive, while the side force coefficient increases by 110% and 88%, respectively. Due to the combined effect of the lift force and side force, the overturning moment of the train with convex ribs and cutting ribs increases by 140% and 106%, respectively. There is larger negative pressure on the roof of the train without ribs than that with ribs. The ribs on the train would disturb the flow structure and contribute to the air separation, so the separation starts from the roof, while there is no air separation on the roof of the train without ribs. The ribs can also slow down the flow speed above the roof and make the air easily sucked back to the train surface. The vortices at the leeward side of the train without ribs are small and messy compared with those of the train with convex or cutting ribs.

  8. Isolated rib fractures in geriatric patients

    OpenAIRE

    Elmistekawy Elsayed; Hammad Abd Almohsen

    2007-01-01

    Introduction: The goal of this study was to investigate the short-term outcomes in patients older than 60 years with isolated rib fractures and admitted to emergency hospital. Materials and Methods: This study included patients who were 60 years old or more and sustained blunt chest injury and had isolated rib fractures. The following data were obtained from the medical records: age, gender, number of fracture ribs, side of fracture ribs, mechanism and nature of injury, preexisting medical...

  9. Primary cutaneous plasmacytosis: Masquerading as hidradenitis suppurativa

    Directory of Open Access Journals (Sweden)

    Tarang Goyal

    2016-01-01

    Full Text Available Isolated cutaneous plasmacytosis (CP is a rare entity with few cases reported in world literature. CP masquerading as hidradenitis suppurativa like presentation is a unique case with some features differentiating it clinically from it which were further confirmed by histopathology and immunostaining. Our case showed hyperplasia of mature plasma cells and polyclonal hypergammaglobulinemia, immunostaining for CD138 positivity and kappa: lambda ratio more than 3:1. Extensive clinical and laboratory investigations failed to reveal any underlying pathology, presence of any underlying disease accompanying the hypergammaglobulinemia and/or plasma cell proliferation.

  10. Primary Cutaneous Plasmacytosis: Masquerading as Hidradenitis Suppurativa

    Science.gov (United States)

    Goyal, Tarang; Varshney, Anupam; Zawar, Vijay; Sharma, Veena

    2016-01-01

    Isolated cutaneous plasmacytosis (CP) is a rare entity with few cases reported in world literature. CP masquerading as hidradenitis suppurativa like presentation is a unique case with some features differentiating it clinically from it which were further confirmed by histopathology and immunostaining. Our case showed hyperplasia of mature plasma cells and polyclonal hypergammaglobulinemia, immunostaining for CD138 positivity and kappa: lambda ratio more than 3:1. Extensive clinical and laboratory investigations failed to reveal any underlying pathology, presence of any underlying disease accompanying the hypergammaglobulinemia and/or plasma cell proliferation. PMID:27057027

  11. Greater auricular nerve masquerading as lymph node.

    Science.gov (United States)

    Saxena, Shilpi; Deb, Prabal; Nijhawan, Vijay Shrawan; Kharayat, Veena; Verma, Rajesh

    2015-01-01

    Hansen's disease is on the verge of being eliminated from India and often missed by clinicians due to low index of suspicion. We present an unusual case in which greater auricular nerve thickening masqueraded as enlarged lymph node in the neck. The patient was referred for fine needle aspiration cytology, which revealed epithelioid cell granulomas suggestive of Hansen's disease. Further clinical examination and investigations including the skin biopsy confirmed the disease, highlighting the role of pathologist in the management of such unusual presentation of a common disease. PMID:26229249

  12. Golfer's fracture of the ribs

    International Nuclear Information System (INIS)

    Golfer's fracture is stress fracture of the posterior portion of left 3, 4, 5, 6 or 7th ribs of golfer's, usually beginners,and it is considered due to exposure to unaccustomed severe exercise of this fascinating sport. Healing is usually uneventful, but possible complication may occur, because symptom is mild and golfers continue the exercise with physical therapy such as massage. Author report 4 cases of golfer's fracture, including 1 case complicated by platelike at electasis of lung.

  13. Postcolonial Masquerading: A Critical Analysis of Masquerading Strategies in the Artworks of Contemporary South African Visual Artists Anton Kannemeyer, Tracey Rose, Mary Sibande, Senzeni Marasela and Nandipha Mntambo

    OpenAIRE

    Khan, Sharlene

    2015-01-01

    This thesis analyses the masquerading strategies employed in the artworks of contemporary South African visual artists Anton Kannemeyer, Tracey Rose, Senzeni Marasela, Mary Sibande and Nandipha Mntambo. Masquerading, in this context, refers to the donning of costumes, make-up and the use of props, in staging one’s own body before the camera lens. This study examines contemporary debates in South Africa around such visual art masquerading performances which have questioned notions of identity,...

  14. Pancreatic tuberculosis masquerading as pancreatic serous cystadenoma

    Institute of Scientific and Technical Information of China (English)

    Seung Goun Hong; Jae Seon Kim; Moon Kyung Joo; Kwang Gyun Lee; Key Hyeon Kim; Cho Rong Oh; Jong-Jae Park; Young-Tae Bak

    2009-01-01

    Solitary pancreatic involvement of tuberculosis is rare,especially in an immunocompetent individual, and it may be misdiagnosed as pancreatic cystic neoplasms.Pancreatic cystic neoplasms are being identified in increasing numbers, probably because of the frequent use of radiology and advances in endoscopic techniques.However, they are composed of a variety of neoplasms with a wide range of malignant potential,and it is often difficult to differentiate pancreatic tuberculosis mimicking cystic neoplasms from benign or malignant pancreatic cystic neoplasms. Non-surgical diagnosis of pancreatic tuberculosis is inconclusive and continues to be a challenge in many cases. If so,then laparotomy should be employed to establish the diagnosis. Therefore, pancreatic tuberculosis should be kept in mind during the differential diagnosis of solitary cystic masses in the pancreas. We report a patient who had solitary pancreatic tuberculosis masquerading as pancreatic serous cystadenoma.

  15. Cervicoplastia anterior Anterior cervicoplasty

    Directory of Open Access Journals (Sweden)

    Lucas Gomes Patrocínio

    2004-10-01

    Full Text Available Muitos pacientes buscam correção estética da frouxidão da pele do pescoço, depósito de gordura na região submentoneana ou bandas de platisma. Em grande parte dos casos a ação medial, via cervicoplastia anterior é necessária. OBJETIVO: Demonstrar a casuística e avaliar os resultados e complicações com a técnica de cervicoplastia anterior no Serviço de Otorrinolaringologia da Universidade Federal de Uberlândia. FORMA DE ESTUDO: Relato de série. PACIENTES E MÉTODOS: Quarenta e dois pacientes, entre 39 e 65 anos de idade, sendo 40 (95,2% do sexo feminino e 2 (4,8% do masculino, foram submetidos a cervicoplastia anterior. Retrospectivamente foram avaliados resultados e complicações. RESULTADOS: Destes, 34 apresentaram resultados satisfatórios, 4 apresentaram déficit estético notado somente pelo cirurgião, 3 apresentaram déficit estético notado somente pelo paciente e 1 apresentou déficit estético necessitando cirurgia revisional. Ao estudo fotográfico, todos os pacientes apresentaram melhora do perfil cervical, redução das bandas de platisma e da frouxidão da pele, estabilização da musculatura cervical e acentuação do ângulo cervicomental, em graus variados. Houve complicação em 2 casos (discreto serohematoma e cicatriz um pouco alargada. CONCLUSÃO: A cervicoplastia, associada ou não à tração lateral pela ritidoplastia, é uma técnica que produz resultados satisfatórios na grande maioria dos casos.Many patients look for aesthetic correction of the laxity of neck skin, submandibular fat deposit or platisma bands. In a large part of the cases, medial action, through anterior cervicoplasty is necessary. AIM: To demonstrate the casuistic and to evaluate the results and complications with anterior cervicoplasty technique in the Otorhinolaryngology Service of the Federal University of Uberlândia. STUDY DESIGN: Serie report. PATIENTS AND METHODS: Forty-two patients, between 39 and 65 years of age, being 40 (95

  16. ENSEMBLE DESIGN OF MASQUERADER DETECTION SYSTEMS FOR INFORMATION SECURITY

    Directory of Open Access Journals (Sweden)

    T. Subbulakshmi

    2011-01-01

    Full Text Available Masqueraders are a category of intruders who impersonate other people on a computer system and use this entry point to use the information stored in the systems or throw other attacks into the network. This paper focuses on Ensemble Design of a Masquerader Detection System using Decision trees and Support Vector Machines for classification with two kernel functions linear and linear BSpline. The key idea is to find out specific patterns of command sequence that tells about user behaviour on a system, and use them to build classifiers that can perfectly recognize anomalous and normal behaviour. Real time truncated command line data set collected from a debian Linux server is used for performance comparison of the developed classifiers with the standard truncated command line data set of Schonlau[4]. The results show that Ensemble Design of Masquerader Detection Systems is much faster than individual Decision trees or Support Vector Machines.

  17. Fabricational morphology of oblique ribs in bivalves.

    Science.gov (United States)

    Checa, Antonio G

    2002-11-01

    The formation of oblique ribs of bivalve shells usually has been attributed to processes of reaction-diffusion of morphogens from cell to cell at the mantle margin or neural activation and lateral inhibition in the mantle. In particular, such ribs appear with high rates of lateral diffusion. Nevertheless, theoretical models fail to explain either partially or wholly some varieties of oblique ribs. After surveying the modes of formation of the shell and oblique ribs by the bivalve mantle and associated fabricational defects, I have determined that the mantle is able to develop an elaborate behavior in order to displace the rib in a particular direction during growth. The mantle margin is, therefore, not only the shell-secreting organ, but also the main morphogenetic unit. In particular, there are two main fabricational strategies. In forms with strict contact guidance (SCG) the mantle is able to project far enough beyond the shell margins so as to feel the already formed reliefs and to align new growth increments of the ribs in the appropriate directions. The shell margin is always strongly reflected. In bivalves with reduced contact guidance plus constant lateral shift (RCG), the margin is usually acute and the information about ribs available to the mantle is reduced. During rib construction the mantle extrudes slightly from the shell edge and then pushes laterally by muscular action; in this way, the new growth increment of the rib is displaced laterally on a small scale. The contact-guidance model is supported also by the homogeneous structure of the shell-secreting mantle. From the morphogenetic standpoint, oblique ribs are related to commarginal ones and both differ completely from other ribbing patterns of bivalves. PMID:12353301

  18. Masquerade Syndrome of Multicentre Primary Central Nervous System Lymphoma

    Directory of Open Access Journals (Sweden)

    Silvana Guerriero

    2011-01-01

    Full Text Available Purpose. In Italy we say that the most unlucky things can happen to physicians when they get sick, despite the attention of colleagues. To confirm this rumor, we report the sad story of a surgeon with bilateral vitreitis and glaucoma unresponsive to traditional therapies. Methods/Design. Case report. Results. After one year of steroidal and immunosuppressive therapy, a vitrectomy, and a trabeculectomy for unresponsive bilateral vitreitis and glaucoma, MRI showed a multicentre primary central nervous system lymphoma, which was the underlying cause of the masquerade syndrome. Conclusions. All ophthalmologists and clinicians must be aware of masquerade syndromes, in order to avoid delays in diagnosis.

  19. Scoliosis secondary to an unusual rib lesion.

    LENUS (Irish Health Repository)

    Burke, N G

    2012-04-01

    Tumours of the chest wall are uncommon and are usually malignant. A bone haemangioma is a rare benign vascular neoplasm, which more commonly occurs in middle-aged patients. We present the case of a scoliosis caused by a rib haemangioma in an adolescent male. Other causes of scoliosis secondary to rib lesions are discussed.

  20. Jet flow on ribbed curved surfaces

    Science.gov (United States)

    Lashkov, Iu. A.; Sokolova, I. N.; Shumilkina, E. A.

    1992-02-01

    The objective of the study was to investigate the possibility of using microribbing to reduce turbulent friction in Coanda flows over curved surfaces. It is shown that ribs make it possible to reduce the effect of a jet impinging on an obstacle and to prevent the Coanda effect when jet attachment is undesirable. The optimal rib parameters are determined.

  1. Cavernous Hemangioma of the Rib: A Rare Diagnosis

    Directory of Open Access Journals (Sweden)

    Stavros Gourgiotis

    2010-01-01

    Full Text Available Hemangioma of the rib is an uncommon benign vascular tumour. A case of rib hemangioma in a 29-year-old woman is presented. Chest roentgenogram and computed tomography revealed a mass along the inner surface of the 7th left rib with bone destruction. She underwent resection of the 7th rib. The pathologic diagnosis was cavernous hemangioma. Hemangiomas of the rib are rare tumours but should be kept in mind in the differential diagnosis of rib tumours.

  2. Nozzle airfoil having movable nozzle ribs

    Science.gov (United States)

    Yu, Yufeng Phillip; Itzel, Gary Michael

    2002-01-01

    A nozzle vane or airfoil structure is provided in which the nozzle ribs are connected to the side walls of the vane or airfoil in such a way that the ribs provide the requisite mechanical support between the concave side and convex side of the airfoil but are not locked in the radial direction of the assembly, longitudinally of the airfoil. The ribs may be bi-cast onto a preformed airfoil side wall structure or fastened to the airfoil by an interlocking slide connection and/or welding. By attaching the nozzle ribs to the nozzle airfoil metal in such a way that allows play longitudinally of the airfoil, the temperature difference induced radial thermal stresses at the nozzle airfoil/rib joint area are reduced while maintaining proper mechanical support of the nozzle side walls.

  3. Stress fractures of the rib arising from the manufactory assembly line

    International Nuclear Information System (INIS)

    serratus anterior muscle, leading to a stress fracture of the rib. It was worthy of note that the 3D-CT revealed an avulsion of the said muscle in one case. To prevent stress fractures of the rib arising from the assembly line, such measures are considered as muscle training of the shoulder girdle, especially the serratus anterior, maintenance of physical condition, meticulous work orientation, innovation of the assembly line etc. (author)

  4. Absence of uptake of the rib cage; diagnosis of a Poland's syndrome with the bone SPECT-CT

    International Nuclear Information System (INIS)

    We report the case of a 37-year-old man, investigated for pains of the right upper limb impairing the hand, the wrist and the shoulder after a surgery for fracture of the radius and the scaphoid. The 99mTc-H.D.P. three-phase bone scintigraphy confirmed the diagnosis of acute phase of a reflex sympathetic dystrophy. The delayed images highlighted a focal absence of tracer uptake of the left anterior rib cage. The single photon emission computerized tomography guided by computerized tomography showed that it was related to the absence of the anterior part of the third and the fourth left ribs highlighting an aplasia of the left pectoralis major muscle. These anomalies led to the diagnosis of congenital malformation in connection with a Poland's syndrome. The differential diagnosis of this syndrome resulted in discussing the multiple etiologies of the photopenic lesions of the rib cage. (authors)

  5. Turbulent flow in a ribbed channel: Flow structures in the vicinity of a rib

    DEFF Research Database (Denmark)

    Wang, Lei; Salewski, Mirko; Sundén, Bengt

    2010-01-01

    PIV measurements are performed in a channel with periodic ribs on one wall. The emphasis of this study is to investigate the flow structures in the vicinity of a rib in terms of mean velocities, Reynolds stresses, probability density functions (PDF), and two-point correlations. The PDF distribution......-based visualization is applied to the separation bubble upstream of the rib. Salient critical points and limit cycles are extracted, which gives clues to the physical processes occurring in the flow....

  6. RIBBED DOUBLE PIPE HEAT EXCHANGER: ANALYTICAL ANALYSIS

    Directory of Open Access Journals (Sweden)

    HUSSAIN H. AL-KAYIEM

    2011-02-01

    Full Text Available This paper presents the findings obtained by modeling a Double Pipe Heat Exchanger (DPHE equipped with repeated ribs from the inside for artificial roughing. An analytical procedure was developed to analyze the thermal and hydraulic performance of the DPHE with and without ribbing. The procedure was verified by comparing with experimental reported results and they are in good agreement. Several parameters were investigated in this study including the effect of ribs pitch to height ratios, P/e= 5, 10, 15, and 20, and ribs to hydraulic diameter ratios, e/Dh= 0.0595, 0.0765, and 0.107. These parameters were studied at various operating Reynolds number ranging from 2500 to 150000. Different installation configurations were investigated, too. An enhan-cement of 4 times in the heat transfer in terms of Stanton number was achieved at the expense of 38 times increase of pressure drop across the flow in terms of friction facto values.

  7. Wrap-rib antenna concept development overview

    Science.gov (United States)

    Woods, A. A., Jr.; Garcia, N. F.

    1983-01-01

    The wrap rib antenna design of a parabolic reflector large space antenna is discussed. Cost estimates, design/mission compatibility, deployment sequence, ground based tests, and fabrication are discussed.

  8. Ribbed vaults of late Gothic in Sardinia

    Directory of Open Access Journals (Sweden)

    Paola Casu

    2012-06-01

    Full Text Available The late Gothic construction practice, settled in the Spanish Mediterranean area, is based on predetermined geometric rules and is shown in religious buildings with ribbed vaults. The proportion between the sides of the area to cover, tracing plan of the ribs as a succession of corner bisectors, stereotomy problems and volumetric aspects, are just some of the elements that can describe the complex construction of a ribbed vault. The aim of this paper is to analyze the dimensional information of the late gothic ribbed vaults of Sardinia, in order to define the geometric and proportional rules for a correct drawing, establishing a standard procedure for the collection of measures and the construction of the 3D model of vaults.

  9. Optimizing rib width to height and rib spacing to deck plate thickness ratios in orthotropic decks

    Directory of Open Access Journals (Sweden)

    Abdullah Fettahoglu

    2016-12-01

    Full Text Available Orthotropic decks are composed of deck plate, ribs, and cross-beams and are frequently used in industry to span long distances, due to their light structures and load carrying capacities. Trapezoidal ribs are broadly preferred as longitudinal stiffeners in design of orthotropic decks. They supply the required stiffness to the orthotropic deck in traffic direction. Trapezoidal ribs are chosen in industrial applications because of their high torsional and buckling rigidity, less material and welding needs. Rib width, height, spacing, thickness of deck plate are important parameters for designing of orthotropic decks. In the scope of this study, rib width to height and rib spacing to deck plate thickness ratios are assessed by means of the stresses developed under different ratios of these parameters. For this purpose a FE-model of orthotropic bridge is generated, which encompasses the entire bridge geometry and conforms to recommendations given in Eurocode 3 Part 2. Afterwards necessary FE-analyses are performed to reveal the stresses developed under different rib width to height and rib spacing to deck plate thickness ratios. Based on the results obtained in this study, recommendations regarding these ratios are provided for orthotropic steel decks occupying trapezoidal ribs.

  10. RIB Production at LNL: the EXOTIC Facility

    Science.gov (United States)

    Marco, Mazzocco

    2016-04-01

    Nuclear reactions involving radioactive isotopes are extremely relevant in several astrophysical scenarios, from the Big-Bang Nucleosynthesis to Supernovae explosions. In this contribution the production of Radioactive Ion Beams (RIBs) by means of the in-flight technique is reviewed. In particular, the use of direct reactions in inverse kinematics for the production of light weakly-bound RIBs by means of the facility EXOTIC at INFN-LNL (Italy) will be described in detail.

  11. Supersonic Wing Optimization Using SpaRibs

    Science.gov (United States)

    Locatelli, David; Mulani, Sameer B.; Liu, Qiang; Tamijani, Ali Y.; Kapania, Rakesh K.

    2014-01-01

    This research investigates the advantages of using curvilinear spars and ribs, termed SpaRibs, to design a supersonic aircraft wing-box in comparison to the use of classic design concepts that employ straight spars and ribs. The objective is to achieve a more efficient load-bearing mechanism and to passively control the deformation of the structure under the flight loads. Moreover, the use of SpaRibs broadens the design space and allows for natural frequencies and natural mode shape tailoring. The SpaRibs concept is implemented in a new optimization MATLAB-based framework referred to as EBF3SSWingOpt. This optimization scheme performs both the sizing and the shaping of the internal structural elements, connecting the optimizer with the analysis software. The shape of the SpaRibs is parametrically defined using the so called Linked Shape method. Each set of SpaRibs is placed in a one by one square domain of the natural space. The set of curves is subsequently transformed in the physical space for creating the wing structure geometry layout. The shape of each curve of each set is unique; however, mathematical relations link the curvature in an effort to reduce the number of design variables. The internal structure of a High Speed Commercial Transport aircraft concept developed by Boeing is optimized subjected to stress, subsonic flutter and supersonic flutter constraints. The results show that the use of the SpaRibs allows for the reduction of the aircraft's primary structure weight without violating the constraints. A weight reduction of about 15 percent is observed.

  12. Sliding Couette flow in a ribbed annulus

    Science.gov (United States)

    Moradi, H. V.; Floryan, J. M.

    2016-07-01

    The flow in an annulus driven by the axial movement of one of the cylinders has been studied. The stationary cylinder has been fitted with axisymmetric ribs resulting in the appearance of the centrifugal-force-driven instability which leads to the formation of axial vortices. The critical stability conditions have been determined for a wide range of geometries of practical interest; these conditions include the critical Reynolds number as well as the best vortex packing. It has been shown that a sufficiently large increase of the ribs' wavelength leads to a flow stabilization as the flow becomes nearly rectilinear, thus reducing the strength of the centrifugal force field. It has also been demonstrated that a sufficiently large decrease of the ribs' wavelength similarly results in the flow stabilization as the stream lifts up above the ribs' peaks and becomes more rectilinear. Reduction of the annulus' radius leads to qualitatively different flow responses depending on the position of the moving cylinder. The critical Reynolds number is reduced and the range of the ribs' wave numbers capable of inducing the instability is increased when the outer cylinder drives the flow. The trend is reversed when the inner cylinder drives the flow. Conditions when the ribbed cylinder is unable to induce any instability and, thus, behaves as a hydraulically smooth cylinder have been identified.

  13. Effect of Aspect Ratio, Channel Orientation, Rib Pitch-to-Height Ratio, and Number of Ribbed Walls on Pressure Drop Characteristics in a Rotating Channel with Detached Ribs

    Directory of Open Access Journals (Sweden)

    K. Arun

    2007-01-01

    Full Text Available The present work involves experimental investigation of the effects of aspect ratio, channel orientation angle, rib pitch-to-height ratio (P/e, and number of ribbed walls on friction factor in orthogonally rotating channel with detached ribs. The ribs are separated from the base wall to provide a small region of flow between the base wall and the ribs. Experiments have been conducted at Reynolds number ranging from 10000–17000 with rotation numbers varying from 0–0.38. Pitch-to-rib height ratios (P/e of 5 and 10 at constant rib height-to-hydraulic diameter ratio (e/D of 0.1 and a clearance ratio (C/e of 0.38 are considered. The rib angle of attack with respect to mainstream flow is 90∘. The channel orientation at which the ribbed wall becomes trailing surface (pressure side on which the Coriolis force acts is considered as the 0∘ orientation angle. For one-wall ribbed case, channel is oriented from 0∘ to 180∘ about its axis in steps of 30∘ to change the orientation angle. For two-wall ribbed case, the orientation angle is changed from 0∘ to 90∘ in steps of 30∘. Friction factors for the detached ribbed channels are compared with the corresponding attached ribbed channel. It is found that in one-wall detached ribbed channel, increase in the friction factor ratio with the orientation angle is lower for rectangular channel compared to that of square channel for both the pitch-to-rib height ratios of 5 and 10 at a given Reynolds number and rotation number. Friction factor ratios of two-wall detached ribbed rectangular channel are comparable with corresponding two-wall detached ribbed square channel both under stationary and rotating conditions.

  14. Osteometric sex discrimination from the sternal extremity of the fourth rib in a recent forensic sample from Southwestern Spain.

    Science.gov (United States)

    Macaluso, P James; Rico, Antonio; Santos, María; Lucena, Joaquín

    2012-11-30

    The discrimination of sex is central to the process of establishing a personal identification from human skeletal remains. Previous study has demonstrated that osteometric analysis of the sternal extremity of the fourth rib provides a reasonably accurate method for assessing this biological attribute in diverse human groups. As metric standards are generally population-specific, the purpose of the current research was to evaluate the degree of sexual dimorphism present in the fourth rib among contemporary Spaniards, a group thus far not investigated, and generate discriminant function equations which can be used to estimate the sex of unidentified remains in this population. Superior-inferior height and anterior-posterior breadth dimensions of the fourth rib were collected for a sample consisting of 60 males and 57 females derived from postmortem examinations performed at the Institute of Legal Medicine, Seville, Spain. The results demonstrated that both rib dimensions were highly sexually dimorphic (pclassification rates of 76.9% and 83.8% for breadth and height dimensions, respectively. Multivariate analysis incorporating both rib measurements improved the allocation accuracy to 86.3%, with an associated sex bias of only 0.7%. Therefore, the derived discriminant function equations, particularly those that incorporate rib height, can be effectively used in cases involving fragmentary remains in which more dimorphic elements such as the pelvis are not preserved, as well as complete skeletons to complement other metric and morphological sex assessment methods. PMID:23068090

  15. Biomechanical investigation of impact induced rib fractures of a porcine infant surrogate model.

    Science.gov (United States)

    Blackburne, William B; Waddell, J Neil; Swain, Michael V; Alves de Sousa, Ricardo J; Kieser, Jules A

    2016-09-01

    This study investigated the structural, biomechanical and fractographic features of rib fractures in a piglet model, to test the hypothesis that fist impact, apart from thoracic squeezing, may result in lateral costal fractures as observed in abused infants. A mechanical fist with an accelerometer was constructed and fixed to a custom jig. Twenty stillborn piglets in the supine position were impacted on the thoracic cage. The resultant force versus time curves from the accelerometer data showed a number of steps indicative of rib fracture. The correlation between impact force and number of fractures was statistically significant (Pearson׳s r=0.528). Of the fractures visualized, 15 completely pierced the parietal pleura of the thoracic wall, and 5 had butterfly fracture patterning. Scanning electron microscopy showed complete bone fractures, at the zone of impact, were normal to the axis of the ribs. Incomplete vertical fractures, with bifurcation, occurred on the periphery of the contact zone. This work suggests the mechanism of rib failure during a fist impact is typical of the transverse fracture pattern in the anterolateral region associated with cases of non-accidental rib injury. The impact events investigated have a velocity of ~2-3m/s, approximately 2×10(4) times faster than previous quasi-static axial and bending tests. While squeezing the infantile may induce buckle fractures in the anterior as well as posterior region of the highly flexible bones, a fist punch impact event may result in anterolateral transverse fractures. Hence, these findings suggest that the presence of anterolateral rib fractures may result from impact rather than manual compression. PMID:27310573

  16. Metastatic Prostate Cancer to the Urethra Masquerading as Urothelial Carcinoma

    OpenAIRE

    Ibrahim Zardawi; Peter Chong

    2016-01-01

    Tumors of the urethra, whether primary or metastatic, are very rare. The true nature of urethral neoplasm is not always obvious clinically nor in routine histological sections. Immunostains should be performed on such lesions because of management implications. We present a case of multiple metastases to the urethra from a prostatic carcinoma, masquerading as multiple urothelial carcinomas. Pathologists and urologists should be aware of the possibility of metastasis from the prostate.

  17. Mimicry and masquerade from the avian visual perspective

    Directory of Open Access Journals (Sweden)

    Mary Caswell STODDARD

    2012-08-01

    Full Text Available Several of the most celebrated examples of visual mimicry, like mimetic eggs laid by avian brood parasites and pala­table insects mimicking distasteful ones, involve signals directed at the eyes of birds. Despite this, studies of mimicry from the avian visual perspective have been rare, particularly with regard to defensive mimicry and masquerade. Defensive visual mimicry, which includes Batesian and Müllerian mimicry, occurs when organisms share a visual signal that functions to deter predators. Masquerade occurs when an organism mimics an inedible or uninteresting object, such as a leaf, stick, or pebble. In this paper, I present five case studies covering diverse examples of defensive mimicry and masquerade as seen by birds. The best-known cases of defensive visual mimicry typically come from insect prey, but birds themselves can exhibit defensive visual mimicry in an attempt to escape mobbing or dissuade avian predators. Using examples of defensive visual mimicry by both insects and birds, I show how quantitative models of avian color, luminance, and pattern vision can be used to enhance our understanding of mimicry in many systems and produce new hypotheses about the evolution and diversity of signals. Overall, I investigate examples of Batesian mimicry (1 and 2, Müllerian mimicry (3 and 4, and masquerade (5 as follows: 1 Polymorphic mimicry in African mocker swallowtail butterflies; 2 Cuckoos mimicking sparrowhawks; 3 Mimicry rings in Neotropical butterflies; 4 Plumage mimicry in toxic pitohuis; and 5 Dead leaf-mimicking butterflies and mantids [Current Zoology 58 (4: 630–648, 2012].

  18. Mimicry and masquerade from the avian visual perspective

    Institute of Scientific and Technical Information of China (English)

    Mary Caswell STODDARD

    2012-01-01

    Several of the most celebrated examples of visual mimicry,like mimetic eggs laid by avian brood parasites and palatable insects mimicking distasteful ones,involve signals directed at the eyes of birds.Despite this,studies of mimicry from the avian visual perspective have been rare,particularly with regard to defensive mimicry and masquerade.Defensive visual mimicry,which includes Batesian and Müllerian mimicry,occurs when organisms share a visual signal that functions to deter predators.Masquerade occurs when an organism mimics an inedible or uninteresting object,such as a leaf,stick,or pebble.In this paper,I present five case studies covering diverse examples of defensive mimicry and masquerade as seen by birds.The best-known cases of defensive visual mimicry typically come from insect prey,but birds themselves can exhibit defensive visual mimicry in an attempt to escape mobbing or dissuade avian predators.Using examples of defensive visual mimicry by both insects and birds,I show how quantitative models of avian color,luminance,and pattern vision can be used to enhance our understanding of mimicry in many systems and produce new hypotheses about the evolution and diversity of signals.Overall,I investigate examples of Batesian mimicry (1 and 2),Müllerian mimicry (3 and 4),and masquerade (5) as follows:1) Polymorphic mimicry in African mocker swallowtail butterflies; 2) Cuckoos mimicking sparrowhawks; 3) Mimicry rings in Neotropical butterflies; 4) Plumage mimicry in toxic pitohuis; and 5) Dead leaf-mimicking butterflies and mantids.

  19. Huntington’s disease masquerading as spinocerebellar ataxia

    OpenAIRE

    Rodríguez-Quiroga, Sergio Alejandro; Gonzalez-Morón, Dolores; Garretto, Nelida; Kauffman, Marcelo Andres

    2013-01-01

    Huntington’s disease (HD) is a neurodegenerative disorder of the central nervous system characterised by the presence of choreic abnormal movements, behavioural or psychiatric disturbances and dementia. Noteworthy, despite atypical motor symptoms other than chorea have been reported as initial presentation in some patients, a very few number of HD patients, presenting at onset mostly cerebellar dysfunction masquerading dominant spinocerebellar ataxias (SCA), were occasionally reported. We rep...

  20. Isolated rib fractures in geriatric patients

    Directory of Open Access Journals (Sweden)

    Elmistekawy Elsayed

    2007-01-01

    Full Text Available Introduction: The goal of this study was to investigate the short-term outcomes in patients older than 60 years with isolated rib fractures and admitted to emergency hospital. Materials and Methods: This study included patients who were 60 years old or more and sustained blunt chest injury and had isolated rib fractures. The following data were obtained from the medical records: age, gender, number of fracture ribs, side of fracture ribs, mechanism and nature of injury, preexisting medical conditions, complications, admission to intensive care unit (ICU, need for mechanical ventilation, length of ICU and hospital stay and mortality. Results: For the study, 39 patients who were 60 years old or more and admitted to the hospital because of isolated rib fractures were enrolled. There were 28 males (71.7% and 11 females (28.3% with mean age of (66.84 ± 4.7 years. No correlation was found between comorbidities and hospital outcomes except in those who were diabetic (P-value = 0.005 and those with chronic lung disease (P-value = 0.006. Pulmonary complications were the most frequent complications encountered in those patients. Pulmonary complications were: lung contusion in 8 patients (20.5% and pulmonary infection in 6 patients (15.8%. Conclusion: Elderly patients sustaining blunt chest trauma had significant morbidity and potential for mortality.

  1. Arthritis of the sternoclavicular joint masquerading as rupture of the cervical oesophagus: a case report

    Directory of Open Access Journals (Sweden)

    Katsoulis Iraklis E

    2009-01-01

    Full Text Available Abstract Introduction Sternoclavicular septic arthritis is a rare condition and accounts only for 1% of cases of septic arthritis in the general population. The most common risk factors are intravenous drug use, central-line infection, distant-site infection, immunosuppression, trauma and diabetes mellitus. This is a report of an unusual case where this type of arthritis was masquerading as rupture of the cervical oesophagus. Case presentation A 63-year-old man presented complaining of right neck pain and dysphagia following a bout of violent coughing. Physical examination revealed cellulitis extending from the right sternoclidomastoid region to the anterior upper chest. Computed tomography showed inflammatory changes behind the right sternoclavicular joint with mediastinitis and ipsilateral pleural effusion. These findings raised the suspicion of spontaneous rupture of the cervical oesophagus. Management involved jejunal feeding along with broad-spectrum antibiotics. The inflammation, however, relapsed after discontinuation of the antibiotics and this time, computed tomography pointed to a diagnosis of arthritis of the sternoclavicular joint. The patient responded completely to a 6-week course of oral penicillin, flucloxacillin and metronidazole. Conclusion Sternoclavicular arthritis is a rare condition that has been associated with a variety of predisposing factors. It may, however, occur in otherwise completely healthy individuals and should be included in the differential diagnosis of other inflammatory conditions of the neck and upper chest.

  2. Melioidosis presenting with mediastinal lymphadenopathy masquerading as malignancy: a case report

    Directory of Open Access Journals (Sweden)

    Saravu Kavitha

    2012-01-01

    Full Text Available Abstract Introduction Melioidosis, endemic in Thailand and in the Northern Territory of Australia is an emerging infectious disease in India which can present with varied forms. A case of melioidosis, presenting as a rare anterior mediastinal mass which can masquerade as malignancy or tuberculosis, is described here. With treatment, our patient initially showed an increase in the size of mediastinal node and development of new submandibular node.. To the best of our knowledge, this phenomenon has not been documented in the literature and the same is highlighted in this case report. Case Presentation A 43-year-old Asian man with diabetes presented with fever, loss of appetite, weight loss for one month and painful swelling below his left mandible for five days. An examination revealed an enlarged left submandibular lymph node and bilateral axillary lymph nodes. A chest X-ray showed mediastinal widening. Computed tomography of his thorax showed a lobulated heterogeneously enhancing anterior mediastinal mass encasing the superior vena cava suggestive of malignancy. An excision biopsy of the lymph node showed granulomas suggestive of tuberculosis but bone marrow culture and lymph node aspirate culture grew Burkholderia pseudomallei. He was treated with parenteral ceftazidime and amoxicillin-clavulanic acid. During the course of treatment, he developed an enlargement of the submandibular lymph node on the opposite side. It gradually subsided with the continuation of therapy orally with a combination of cotrimoxazole and doxycycline for six months. A repeat computed tomography chest scan showed resolution of the mediastinal mass. Conclusion Melioidosis can present as a mediastinal mass that mimics tuberculosis or malignancy. During the initial phase of treatment of melioidosis, the appearance of new lymph nodes or an increase in the size of the existing lymph nodes does not mean treatment failure. Inexperienced clinicians may consider this as

  3. Mechanical Action of the Intercostal Muscles on the Ribs

    Science.gov (United States)

    de Troyer, Andre; Kelly, Suzanne; Zin, Walter A.

    1983-04-01

    The external and internal interosseous intercostal muscles were separately stimulated at end-expiratory lung volume in anesthetized dogs. These muscles were all found to elevate the ribs into which they insert. By attaching weights to the ribs, it was determined that the nonlinear compliance of the ribs was responsible for this phenomenon.

  4. Anterior tarsaltunnelsyndrom

    DEFF Research Database (Denmark)

    Miliam, Palle B; Basse, Peter N

    2009-01-01

    Anterior tarsal tunnel syndrome is a rare entrapment neuropathy of the deep peroneal nerve beneath the extensor retinaculum of the ankle. It may be rare because it is underrecognized clinically.We present a case regarding a 29-year-old man, drummer, who for one and a half year experienced clinical...

  5. Factors affecting visualization of posterior rib fractures in abused infants

    International Nuclear Information System (INIS)

    Rib fractures in abused infants commonly occur in the posterior rib arcs. Fractures occurring near the costovertebral articulations are usually identified radiographically only once callus has formed. To assess the factors influencing the visibility of fractures near the costovertical articulations, the authors studied 103 posterior rib fractures occurring in 16 abused infants. Radiologic findings were correlated with CT findings and pathologic material from nine ribs in four patients. The limited visibility of fractures relates to (1) the frequent superimposition of the transverse process over the rib fracture site, (2) a fracture line that crosses at an obliquity to the x-ray beam, and (3) nondisplacement of rib fragments due to preservation of the posterior periosteum. Fresh rib fractures invisible on a frontal projection may be clearly defined on axial CT scans, or on postmortem radiographs. A knowledge of the factors influencing the visibility of these important injuries is useful in planning an appropriate diagnostic evaluation of suspected infant abuse

  6. Chondral Rib Fractures in Professional American Football

    Science.gov (United States)

    McAdams, Timothy R.; Deimel, Jay F.; Ferguson, Jeff; Beamer, Brandon S.; Beaulieu, Christopher F.

    2016-01-01

    Background: Although a recognized and discussed injury, chondral rib fractures in professional American football have not been previously reported in the literature. There currently exists no consensus on how to identify and treat these injuries or the expected return to play for the athlete. Purpose: To present 2 cases of chondral rib injuries in the National Football League (NFL) and discuss the current practice patterns for management of these injuries among the NFL team physicians. Study Design: Case series; Level of evidence, 4. Methods: Two cases of NFL players with chondral rib injuries are presented. A survey regarding work-up and treatment of these injuries was completed by team physicians at the 2014 NFL Combine. Our experience in identifying and treating these injuries is presented in conjunction with a survey of NFL team physicians’ experiences. Results: Two cases of rib chondral injuries were diagnosed by computed tomography (CT) and treated with rest and protective splinting. Return to play was 2 to 4 weeks. NFL Combine survey results show that NFL team physicians see a mean of 4 costal cartilage injuries per 5-year period, or approximately 1 case per year per team. Seventy percent of team physicians use CT scanning and 43% use magnetic resonance imaging for diagnosis of these injuries. An anesthetic block is used acutely in 57% and only electively in subsequent games by 39%. Conclusion: A high index of suspicion is necessary to diagnose chondral rib injuries in American football. CT scan is most commonly used to confirm diagnosis. Return to play can take up to 2 to 4 weeks with a protective device, although anesthetic blocks can be used to potentially expedite return. Clinical Relevance: Chondral rib injuries are common among NFL football players, while there is no literature to support proper diagnosis and treatment of these injuries or expected duration of recovery. These injuries are likely common in other contact sports and levels of

  7. Inflammatory demyelinating pseudotumor with hemorrhage masquerading high grade cerebral neoplasm

    Directory of Open Access Journals (Sweden)

    Amit Agrawal

    2015-03-01

    Full Text Available Demyelinating pseudotumors are rare, benign, solitary intracranial space occupying lesions which masquerade cerebral neoplasms. Contrast MRI shows open ring enhancement which is fairly specific for this entity. Advanced MRI techniques like MR spectroscopy and magnetizing transfer techniques can help differentiating these lesions. NAA/Cr ratio is significantly elevated in central regions of demyelinating pseudotumors than in gliomas and other lesions. Presence of abundant foamy macrophages, lymphoid inflammatory infiltrates around blood vessels, sheets of gemistocytic astrocytes with well-developed processes, well defined border of the lesion absence of neovascularity and necrosis should help us diagnose demyelinating pseudotumor fairly confidently on histopathology.

  8. Giant cell tumor of the rib

    International Nuclear Information System (INIS)

    A 27-year-old woman with a giant cell tumor of the rib with a cystic-hemorrhagic appearance underwent surgery consisting of en bloc resection and reconstruction of the thoracic wall with Marlex mesh, reinforced with two titanium plates. When possible this type of tumor requires resection, instead of radiotherapy, since the majority of cases of malignant transformation are linked to prior radiation therapy. (orig.)

  9. Rib stress fractures in elite rowers

    OpenAIRE

    Vinther, Anders

    2009-01-01

    The aim was to investigate potential risk factors and suggested injury mechanisms involved in the development of exercise-induced rib stress fractures (RSF) in elite rowers as well as investigate biomechanical and neuromuscular differences of ergometer rowing in stationary and slide-based ergometers. BMD and muscle strength was assessed as well as EMG of thoracic muscles and rowing technique during ergometer rowing in rowers with previous RSF and controls. The RSF subjects displayed reduc...

  10. Value of postmortem thoracic CT over radiography in imaging of pediatric rib fractures

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Terence S.; Babyn, Paul S. [The Hospital for Sick Children, Department of Diagnostic Imaging, Toronto (Canada); Reyes, Jeanette A.; Chiasson, David A. [The Hospital for Sick Children, Department of Paediatric Laboratory Medicine, Toronto (Canada); Moineddin, Rahim [University of Toronto, Department of Family and Community Medicine, Toronto (Canada); Berdon, Walter E. [Columbia Presbyterian Medical Center, Babies Hospital, Department of Radiology, New York, NY (United States)

    2011-06-15

    Studies have reported that thoracic CT may provide greater sensitivity compared with radiography in detection of pediatric rib fractures and fracture healing. The additional sensitivity afforded by thoracic CT may have medicolegal implications where abuse is suspected. To determine the additional value of postmortem thoracic CT compared with radiography in detecting pediatric rib fractures, and fracture healing, using autopsy findings as a gold standard. We retrospectively reviewed 56 coroner's cases with postmortem radiography and CT thoracic survey. All studies underwent primary interpretation by one or two radiologists. The study radiologist independently reviewed all images from 13 patients with positive findings on radiography, CT or autopsy. Sensitivity and specificity between observers and imaging modalities were compared. Primary interpretation: Fractures were recognized on radiography in 5/12 patients who had fractures found at autopsy, and on CT in 8/12 patients. In total, 29% (24/83) of fractures were reported on radiography, and 51% (52/101) of fractures were reported on CT. Study radiologist: Fractures were recognized on radiography in 7/12 patients who had fractures found at autopsy, and on CT in 11/12 patients. In total, 46% (38/83) of fractures were reported on radiography, and 85% (86/101) of fractures were reported on CT. Postmortem thoracic CT provides greater sensitivity than radiography in detecting pediatric rib fractures, most notably in anterior and posterior fractures. However, the degree of improvement in sensitivity provided by CT might depend on observer experience. (orig.)

  11. Cutaneous Metastasis of Medullary Carcinoma Thyroid Masquerading as Subcutaneous Nodules Anterior Chest and Mandibular Region

    OpenAIRE

    Rahul Mannan; Jasmine Kaur; Jasleen Kaur; Sanjay Piplani; Harjot Kaur; Harleen Kaur

    2014-01-01

    Cutaneous metastasis of underlying primary malignancies can present to dermatologist with chief complaints of cutaneous lesions. The underlying malignancy is generally diagnosed much later after a complete assessment of the concerned case. Medullary carcinoma thyroid (MCT) is a relatively uncommon primary neoplasia of the thyroid. Very few cases presenting as cutaneous metastases of MCT have been reported in the literature. Most of the cases which have been reported are of the papillary and t...

  12. Slipping Rib Syndrome as Persistent Abdominal and Chest Pain.

    Science.gov (United States)

    Bolaños-Vergaray, Juan Javier; de la Gala García, Francisco; Obaya Rebollar, Juan Carlos; Bové Alvarez, Maria

    2015-11-01

    Slipping rib syndrome is an overlooked cause of persistent abdominal or chest pain. The etiology of this syndrome is not well understood, but the characteristic pain is from hypermobility of the false ribs. Although it is a diagnosis of exclusion, misdiagnosis may lead to an excessive workup. A simple clinical examination via the hooking maneuver is the most significant feature of its diagnosis. We describe the case of a 41-year-old woman with slipping rib syndrome. PMID:26528703

  13. The sound transmission of finite ribbed plates using a variational

    DEFF Research Database (Denmark)

    Brunskog, Jonas

    2012-01-01

    Many lightweight structures consist of plates being stiffened by ribs. The rib stiffeners can significantly change the vibration field and the radiation behavior of the structure. These type of structures has thus often been studied in the past. However, there is a lack of simplified expressions...... for the sound transmission of these structures. Therefore, simplified expressions for the sound transmission of finite single leaf ribbed plates are derived, using a variational technique based on integral equations of the fluid loaded plate....

  14. Intrathoracic Rib Associated with Pulmonary Collapse in a Pediatric Patient

    International Nuclear Information System (INIS)

    The ribs are essential structures of the osseous thorax that provide certain significant information and aid interpretation of radiologic images in daily routine practice. Intrathoracic rib is a rare congenital anomaly that is usually discovered incidentally, but may cause in vain interventions in case of being unaware. We herein report an intrathoracic rib in a girl whose chest X-ray was strange enough to obtain a spiral computed tomography (CT) scanning for a definitive diagnosis afterwards

  15. Predictions for particle deposition from LES of ribbed channel flow

    International Nuclear Information System (INIS)

    Predictions for the deposition of spherical and cylindrical particles from a ribbed channel flow onto adjacent flow boundaries are obtained using large eddy simulation (LES) under the assumption of one-way coupling. Results indicate that spherical particles tend to accumulate on the vertical rib wall facing the mean-flow direction with little particle deposition onto surfaces immediately downstream of the rib. This preferential deposition is not predicted for cylindrical particles

  16. Eliminating rib shadows in chest radiographic images providing diagnostic assistance.

    Science.gov (United States)

    Oğul, Hasan; Oğul, B Buket; Ağıldere, A Muhteşem; Bayrak, Tuncay; Sümer, Emre

    2016-04-01

    A major difficulty with chest radiographic analysis is the invisibility of abnormalities caused by the superimposition of normal anatomical structures, such as ribs, over the main tissue to be examined. Suppressing the ribs with no information loss about the original tissue would therefore be helpful during manual identification or computer-aided detection of nodules on a chest radiographic image. In this study, we introduce a two-step algorithm for eliminating rib shadows in chest radiographic images. The algorithm first delineates the ribs using a novel hybrid self-template approach and then suppresses these delineated ribs using an unsupervised regression model that takes into account the change in proximal thickness (depth) of bone in the vertical axis. The performance of the system is evaluated using a benchmark set of real chest radiographic images. The experimental results determine that proposed method for rib delineation can provide higher accuracy than existing methods. The knowledge of rib delineation can remarkably improve the nodule detection performance of a current computer-aided diagnosis (CAD) system. It is also shown that the rib suppression algorithm can increase the nodule visibility by eliminating rib shadows while mostly preserving the nodule intensity. PMID:26775736

  17. Stress injury of the rib in a swimmer

    Energy Technology Data Exchange (ETDEWEB)

    Heincelman, Carrie [University of Cincinnati Medical Center, Department of Orthopaedic Surgery, Cincinnati, OH (United States); Brown, Seth; England, Eric; Mehta, Kaushal; Wissman, Robert D. [University of Cincinnati Medical Center, Department of Radiology, Cincinnati, OH (United States)

    2014-09-15

    Rib stress injuries are uncommonly reported but have been documented among athletes, most notably rowers. There have only been two prior case reports of rib stress injuries in swimmers, both of which were young females. Magnetic resonance (MR) imaging was either not obtained or the imaging characteristics were incompletely described. We present a case of an isolated third rib stress injury in a collegiate male swimmer diagnosed via MR imaging. We briefly discuss the possible etiologies for rib stress injuries, their MR appearance, as well as their treatment. (orig.)

  18. Detection and labeling ribs on expiration chest radiographs

    Science.gov (United States)

    Park, Mira; Jin, Jesse S.; Wilson, Laurence S.

    2003-06-01

    Typically, inspiration is preferred when xraying the lungs. The x-ray technologist will ask a patient to be still and to take a deep breath and to hold it. This not only reduces the possibility of a blurred image but also enhances the quality of the image since air-filled lungs are easier to see on x-ray film. However, inspiration causes low density in the inner part of lung field. That means that ribs in the inner part of lung field have lower density than the other parts nearer to the border of the lung field. That is why edge detection algorithms often fail to detect ribs. Therefore to make rib edges clear we try to produce an expiration lung field using a 'hemi-elliptical cavity.' Based on the expiration lung field, we extract the rib edges using canny edge detector and a new connectivity method, called '4 way with 10-neighbors connectivity' to detect clavicle and rib edge candidates. Once the edge candidates are formed, our system selects the best candidates using knowledge-based constraints such as a gradient, length and location. The edges can be paired and labeled as superior rib edge and inferior rib edge. Then the system uses the clavicle, which is obtained in a same method for the rib edge detection, as a landmark to label all detected ribs.

  19. A chondrosarcoma in the anterior mediastinum mimicking a thymoma

    International Nuclear Information System (INIS)

    A chondrosarcoma in the anterior mediastinum is a rare finding with a relatively good prognosis. We describe a case of a 75-year-old man with a 2-year history of neck discomfort and weight loss. Imaging showed a homogenous tumor with a minor compression on the anterior part of the heart. It had close relation to the ribs, no surrounding fat, and a thymoma was suspected. Biopsy prior to surgery was impossible due to the location of the tumor. Unfortunately, final pathology from the surgical specimen revealed a chondrosarcoma

  20. A chondrosarcoma in the anterior mediastinum mimicking a thymoma

    DEFF Research Database (Denmark)

    Østergaard, Mia L.; Petersen, Rene H; Kalhauge, Anna

    2015-01-01

    A chondrosarcoma in the anterior mediastinum is a rare finding with a relatively good prognosis. We describe a case of a 75-year-old man with a 2-year history of neck discomfort and weight loss. Imaging showed a homogenous tumor with a minor compression on the anterior part of the heart. It had...... close relation to the ribs, no surrounding fat, and a thymoma was suspected. Biopsy prior to surgery was impossible due to the location of the tumor. Unfortunately, final pathology from the surgical specimen revealed a chondrosarcoma....

  1. Computed tomography measurement of rib cage morphometry in emphysema.

    Directory of Open Access Journals (Sweden)

    Nicola Sverzellati

    Full Text Available BACKGROUND: Factors determining the shape of the human rib cage are not completely understood. We aimed to quantify the contribution of anthropometric and COPD-related changes to rib cage variability in adult cigarette smokers. METHODS: Rib cage diameters and areas (calculated from the inner surface of the rib cage in 816 smokers with or without COPD, were evaluated at three anatomical levels using computed tomography (CT. CTs were analyzed with software, which allows quantification of total emphysema (emphysema%. The relationship between rib cage measurements and anthropometric factors, lung function indices, and %emphysema were tested using linear regression models. RESULTS: A model that included gender, age, BMI, emphysema%, forced expiratory volume in one second (FEV1%, and forced vital capacity (FVC% fit best with the rib cage measurements (R(2 = 64% for the rib cage area variation at the lower anatomical level. Gender had the biggest impact on rib cage diameter and area (105.3 cm(2; 95% CI: 111.7 to 98.8 for male lower area. Emphysema% was responsible for an increase in size of upper and middle CT areas (up to 5.4 cm(2; 95% CI: 3.0 to 7.8 for an emphysema increase of 5%. Lower rib cage areas decreased as FVC% decreased (5.1 cm(2; 95% CI: 2.5 to 7.6 for 10 percentage points of FVC variation. CONCLUSIONS: This study demonstrates that simple CT measurements can predict rib cage morphometric variability and also highlight relationships between rib cage morphometry and emphysema.

  2. Delayed phlegmon with gallstone fragments masquerading as soft tissue sarcoma

    Science.gov (United States)

    Goodman, Laura F.; Bateni, Cyrus P.; Bishop, John W.; Canter, Robert J.

    2016-01-01

    Complications from lost gallstones after cholecystectomy are rare but varied from simple perihepatic abscess to empyema and expectoration of gallstones. Gallstone complications have been reported in nearly every organ system, although reports of malignant masquerade of retained gallstones are few. We present the case of an 87-year-old woman with a flank soft tissue tumor 4 years after laparoscopic cholecystectomy. The initial clinical, radiographic and biopsy findings were consistent with soft tissue sarcoma (STS), but careful review of her case in multidisciplinary conference raised the suspicion for retained gallstones rather than STS. The patient was treated with incisional biopsy/drainage of the mass, and gallstones were retrieved. The patient recovered completely without an extensive resectional procedure, emphasizing the importance of multidisciplinary sarcoma care to optimize outcomes for potential sarcoma patients. PMID:27333918

  3. Prototype negative ion sources for RIB generation

    Energy Technology Data Exchange (ETDEWEB)

    Alton, G.D.; Murray, S.N. [Oak Ridge National Lab., TN (United States); Welton, R.F.; Williams, C. [Oak Ridge National Lab., TN (United States)]|[Oak Ridge Inst. of Science and Engineering, TN (United States); Cui, B. [China Inst. of Atomic Energy, Beijing (China)

    1997-12-01

    Radioactive ion beams (RIBs) of {sup 17}F and {sup 18}F are of interest for investigation of astrophysical phenomena such as the hot CNO cycle and the rp stellar nuclear synthesis processes. In order to generate useful beam intensities of atomic F{sup {minus}}, the species must be efficiently and expediently released from the target material, thermally dissociated from fluoride release products during transport to the ionization chamber of the ion source, and efficiently ionized in the source upon arrival. The authors have conceived and evaluated two prototype negative ion sources for potential use for RIB generation: (1) a direct extraction source and (2) a kinetic ejection source. Both sources utilize Cs vapor to enhance F{sup {minus}} formation. The mechanical design features, operational parameters, ionization efficiencies for forming atomic F{sup {minus}} and delay times for transport of F and fluoride compounds for the respective sources are presented. The efficiency {eta} for formation and extraction of F{sup {minus}} for the direct extraction negative ion source is found to be {eta} {approximately} 1.0% while the characteristic delay time {tau} for transport of F and fluorides through the source is typically, {eta} {approximately} 120s; the analogous efficiencies and delay times for the kinetic ejection negative ion source are, respectively: {eta} = {approximately}3.2% and {tau} = {approximately}70s.

  4. Prototype negative ion sources for RIB generation

    International Nuclear Information System (INIS)

    Radioactive ion beams (RIBs) of 17F and 18F are of interest for investigation of astrophysical phenomena such as the hot CNO cycle and the rp stellar nuclear synthesis processes. In order to generate useful beam intensities of atomic F-, the species must be efficiently and expediently released from the target material, thermally dissociated from fluoride release products during transport to the ionization chamber of the ion source, and efficiently ionized in the source upon arrival. The authors have conceived and evaluated two prototype negative ion sources for potential use for RIB generation: (1) a direct extraction source and (2) a kinetic ejection source. Both sources utilize Cs vapor to enhance F- formation. The mechanical design features, operational parameters, ionization efficiencies for forming atomic F- and delay times for transport of F and fluoride compounds for the respective sources are presented. The efficiency η for formation and extraction of F- for the direct extraction negative ion source is found to be η ∼ 1.0% while the characteristic delay time τ for transport of F and fluorides through the source is typically, η ∼ 120s; the analogous efficiencies and delay times for the kinetic ejection negative ion source are, respectively: η = ∼3.2% and τ = ∼70s

  5. Rib enlargement in premature infants with bronchopulmonary dysplasia

    Energy Technology Data Exchange (ETDEWEB)

    Yoon, Hye Kyung; Han, Kim Bokyung; Chang, Yun Sil; Choo, In Wook [Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul (Korea, Republic of); Kim, Kyeong Ah [Anyang General Hospital, Anyang (Korea, Republic of)

    2000-04-01

    The purpose of this study is to describe the rib changes seen in patients with brochopulmonary dysplasia (BPD). Serial chest radiographs of nine premature infants with BPD who showed diffuse rib enlargement were reviewed for hyperinflation, which was compared with the observed degree of rib enlargement. Vibrator chest physiotherapy was performed in all cases, and five infants underwent conventional ventilation plus high frequency oscillatory ventilation therapy. Their calcium level was normal whereas alkaline phosphatase and phosphate levels were high. In all infants except one, liver enzyme levels were normal. For the treatment of patent ductus arteriosus, infection, and BPD, medications including indomethacin, antibiotics, and dexamethasone were administered. Vitamin D was given to all patients with total parenteral nutrition. Rib enlargement was found to be severe (n=3D4), moderate (n=3D3), or mild (n=3D2) with undulating margins or posterior tapering (n=3D2). Hyperinflation was noted in eight patients, in seven of whom it was moderate to severe. Among these seven, rib enlargement was severe (n=3D2), moderate (n=3D3), or mild (n=3D2). In one infant with mild hyperinflation, rib enlargement was severe. Bilateral irregular infiltrates and atelectases were noted in all patients. In BPD patients, rib enlargement may be seen. In order to differentiate this process from systemic bone disease or bony dysplasia, an awareness of the rib changes occurring in patients with BPD may be important. (author)

  6. Rib enlargement in premature infants with bronchopulmonary dysplasia

    International Nuclear Information System (INIS)

    The purpose of this study is to describe the rib changes seen in patients with brochopulmonary dysplasia (BPD). Serial chest radiographs of nine premature infants with BPD who showed diffuse rib enlargement were reviewed for hyperinflation, which was compared with the observed degree of rib enlargement. Vibrator chest physiotherapy was performed in all cases, and five infants underwent conventional ventilation plus high frequency oscillatory ventilation therapy. Their calcium level was normal whereas alkaline phosphatase and phosphate levels were high. In all infants except one, liver enzyme levels were normal. For the treatment of patent ductus arteriosus, infection, and BPD, medications including indomethacin, antibiotics, and dexamethasone were administered. Vitamin D was given to all patients with total parenteral nutrition. Rib enlargement was found to be severe (n=3D4), moderate (n=3D3), or mild (n=3D2) with undulating margins or posterior tapering (n=3D2). Hyperinflation was noted in eight patients, in seven of whom it was moderate to severe. Among these seven, rib enlargement was severe (n=3D2), moderate (n=3D3), or mild (n=3D2). In one infant with mild hyperinflation, rib enlargement was severe. Bilateral irregular infiltrates and atelectases were noted in all patients. In BPD patients, rib enlargement may be seen. In order to differentiate this process from systemic bone disease or bony dysplasia, an awareness of the rib changes occurring in patients with BPD may be important. (author)

  7. Comparison of Postoperative Pain Relief by Intercostal Block Between Pre-rib Harvest and Post-rib Harvest Groups

    International Nuclear Information System (INIS)

    Objective: To compare intercostal nerve block before and after rib harvest in terms of mean postoperative pain score and mean postoperative tramadol usage. Study Design: Randomized controlled trial. Place and Duration of Study: Department of Plastic Surgery, Mayo Hospital, KEMU, Lahore, from January 2011 to July 2012. Methodology: Patients (n = 120) of either gender with ASA class-I and II requiring autogenous costal cartilage graft were inducted. Patients having history of local anaesthetic hypersensitivity and age 60 years were excluded. Subjects were randomly assigned to pre-rib harvest (group-1) and post-rib harvest (group-2). Local anaesthetic mixture was prepared by adding 10 milliliters 2% lidocaine to 10 milliliters 0.5% bupivacaine to obtain a total 20 ml solution. Group-1 received local anaesthetic infiltration along the proposed incision lines and intercostals block before the rib harvest. Group-2 received the infiltration and block after rib harvest. Postoperative consumption of tramadol and pain scores were measured at 6 and 12 hours postoperatively using VAS. Results: Mean age was 31.43 A +- 10.78 years. The mean pain scores at 6 hours postoperatively were 1.033 A +- 0.609 and 2.4667 A +- 0.812 in pre-rib harvest and post-rib harvest groups respectively (p < 0.0001). The mean pain scores at 12 hours postoperatively were 1.45 A +- 0.565 and 3.65 A +- 0.633 in pre-rib harvest and post-rib harvest groups respectively (p < 0.0001). The mean tramadol used postoperatively in first 24 hours was 169 A +- 29.24 mg and 255 A +- 17.70 mg in prerib harvest and post-rib harvest groups respectively (p < 0.0001). Conclusion: Intercostal block administered before rib harvest as preemptive strategy result in decreased postoperative pain scores and narcotic use. (author)

  8. NUMERICAL INVESTIGATION ON FLOW CHARACTERISTICS IN RIBBED BEND

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Previous research[1]by the author has proved that ribbed bend technology is a simple and efficient anti-erosion method. The present paper is a further study to unveil the mechanism of the technology by using numerical method. The flow characteristics in ribbed bend were studied. A k-ε turbulence model was used and the simulations were carried out in the body-fitted coordinates. This procedure was confirmed to be credible by showing the satisfactory agreement between the predications and experimental results. It is concluded that the character of the longitudinal flow in ribbed bend especially in the concave parts between ribs has a beneficial effect on increasing the anti-erosion ability of ribbed bend but the secondary flow will have little effect on determining the particle trajectory.

  9. Diagnosis and treatment of anterior uveitis: optometric management

    Directory of Open Access Journals (Sweden)

    Harthan JS

    2016-03-01

    Full Text Available Jennifer S Harthan,1 Dominick L Opitz,2 Stephanie R Fromstein,1 Christina E Morettin3 1Cornea Center for Clinical Experience, 2Ophthalmology Services and Practice Development, 3Urgent Eye Care Service, Illinois College of Optometry, Chicago, IL, USA Abstract: Anterior uveitis encompasses inflammation of the iris and/or ciliary body and is one of the most common types of ocular inflammation that primary eye care practitioners will encounter. Anterior uveitis may be caused by a variety of etiologies, including infectious, noninfectious, and masquerade diseases. The short-term and long-term treatment of uveitis should include the evaluation of location, duration, pathology, and laterality, in addition to presenting signs and symptoms of the disease. A complete review of systems, thorough examination, and laboratory testing, may assist the practitioner in narrowing the list of possible causes for the uveitis. This is imperative as once a list of diagnoses has been made, a targeted approach to treatment can be pursued. Keywords: anterior uveitis, iritis, inflammation

  10. PIV Measurements of Turbulent Flow in a Channel with Solid or Perforated Ribs

    DEFF Research Database (Denmark)

    Wang, Lei; Salewski, Mirko; Sundén, Bengt

    2011-01-01

    Particle image velocimetry measurements are performed in a channel with periodic ribs on one wall. We investigate the flow around two different rib configurations: solid and perforated ribs with a slit. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. For...... the perforated ribs, the slit height is 20% of the rib height, and the open-area ratio is 16%. We discuss the flow in terms of mean velocity, streamlines, vorticity, turbulence intensity, and Reynolds shear stress. We find that the recirculation bubbles after the perforated ribs are significantly...

  11. Painful rib hump: a new clinical sign for detecting intraspinal rib displacement in scoliosis due to neurofibromatosis

    Directory of Open Access Journals (Sweden)

    Katsalouli Marina

    2006-06-01

    Full Text Available Abstract Background Spinal cord compression and associate neurological impairment is rare in patients with scoliosis and neurofibromatosis. Common reasons are vertebral subluxation, dislocation, angulation and tumorous lesions around the spinal canal. Only twelve cases of intraspinal rib dislocation have been reported in the literature. The aim of this report is to present a case of rib penetration through neural foramen at the apex of a scoliotic curve in neurofibromatosis and to introduce a new clinical sign for its detection. Methods A 13-year-old girl was evaluated for progressive left thoracic kyphoscoliotic curve due to a type I neurofibromatosis. Clinical examination revealed multiple large thoracic and abdominal "cafe-au-lait" spots, neurological impairment of the lower limbs and the presence of a thoracic gibbous that was painful to pressure at the level of the left eighth rib (Painful Rib Hump. CT-scan showed detachment and translocation of the cephalic end of the left eighth rib into the adjacent enlarged neural foramen. The M.R.I. examination of the spine showed neither cord abnormality nor neurogenic tumor. Results The patient underwent resection of the intraspinal mobile eighth rib head and posterior spinal instrumentation and was neurologically fully recovered six months postoperatively. Conclusion Spine surgeons should be aware of intraspinal rib displacement in scoliotic curves in neurofibromatosis. Painful rib hump is a valuable diagnostic tool for this rare clinical entity.

  12. Lacrimal and nasal masquerades of congenital nasolacrimal duct obstructions: etiology, management, and outcomes.

    Science.gov (United States)

    Kamal, Saurabh; Ali, Mohammad Javed; Gupta, Adit; Naik, Milind N

    2015-12-01

    The purpose of this study was to report various conditions masquerading as congenital nasolacrimal duct obstruction (CNLDO). Retrospective review was designed in a tertiary hospital setting. 92 eyes of 65 consecutive patients were included in this study. All patients presenting with CNLDO symptomatology but where the diagnosis of CNLDO was subsequently ruled out were included in the study. The study patients were recruited from a single surgeon's (MJA) tertiary eye care practice over a 3-year period from 2011 to 2013. A detailed clinical evaluation and a further lacrimal system evaluation were performed under general anesthesia. The main outcome measure was other lacrimal and nasal conditions masquerading as CNLDO. Average age at presentation was 43.49 ± 31.78 months. All cases had symptoms of either watering or discharge with an increase tear meniscus or abnormal fluorescein dye disappearance test. The commonest masquerades of congenital nasolacrimal duct obstruction include incomplete punctal canalisation (27.2 %), functional epiphora (14.1 %), punctal agenesis (14.1 %), monocanalicular obstructions (10.8 %), and presaccal stenosis (8.7 %). Each masquerade was managed specifically and at the last follow-up of 5.85 ± 10.85 months, 63 % eyes (58/92) had no epiphora and 2.2 % (2/92) eyes had occasional epiphora. Parents of patients with punctal agenesis were counseled for option of conjunctivodacryocystorhinostomy in future. Incomplete punctal canalisation is the commonest masquerade among many conditions that may mimic CNLDO and mandates a careful evaluation. Specific management of each masquerade results in satisfactory outcomes. PMID:25680420

  13. Radiation Induced Rib Fractures on Bone Scan after Breast Cancer Surgery and Radiation Therapy

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hae Won; Won, Kyoung Sook; Zeon, Seok Kil; Kim, Jin Hee [Keimyung University, School of Medicine, Daegu (Korea, Republic of)

    2009-08-15

    This study is to evaluate rib fractures on bone scan in breast cancer patients treated with breast cancer surgery and radiation therapy and to evaluate its relation with radiation therapy and operation modality. Two hundred seventy cases that underwent serial bone scan after breast cancer surgery and radiation therapy were enrolled. Bone scan and chest CT findings of rib fracture were analyzed. The rib uptake was seen in 74 of 270 cases (27.4%) on bone scan and 50 cases (18.5%) were confirmed to have rib fracture by chest CT. The rate of modified radical mastectomy in patients with rib fracture was significantly higher than that in patients without rib fracture (66.0% vs. 27.0%, p=0.000). The rate of additional radiation therapy to axillar or supraclavicular regions in patients with rib fracture was significantly higher than that in patients without rib fracture (62.0% vs. 28.6%, p=0.000). Rib fracture was seen most frequently at 1-2 years after radiation therapy (51.9%) and single rib fracture was seen most frequently (55.2%). Of total 106 rib fractures, focal rib uptake was seen in 94 ribs (88.7%) and diffuse rib uptake was seen in 12 ribs (11.3%). On one year follow-up bone scan, complete resolution of rib uptake was seen in 15 ribs (14.2%). On chest CT, the rate of fracture line in ribs with intense uptake was significantly higher than that in ribs with mild or moderate uptake (p=0.000). The rate of presence of fracture line in ribs with focal uptake was significantly higher than that in ribs with diffuse uptake (p=0.001). Rib fracture in breast cancer patients after radiation therapy was related to radiation portal and operation modality. It should be interpreted carefully as a differential diagnosis of bone metastasis.

  14. Phacoemulsification in anterior megalophthalmos.

    Science.gov (United States)

    Lee, Graham A; Hann, Joshua V; Braga-Mele, Rosa

    2006-07-01

    This case outlines the phacoemulsification technique used to overcome the challenge of the hyperdeep anterior chamber, weak zonules, abnormal anterior capsule, and large capsular bag. Key steps included trypan blue staining of the anterior capsule, a large capsulorhexis, prolapse of the nucleus into the anterior chamber with phacoemulsification anterior to the capsulorhexis, and a posterior chamber-placed iris-clip intraocular lens. Successful visual rehabilitation is achievable in these anatomically challenging eyes. PMID:16857490

  15. Results of the spine-to-rib-cage distraction in the treatment of early onset scoliosis

    Directory of Open Access Journals (Sweden)

    Teli Marco

    2010-01-01

    Full Text Available Background: Growing rod systems have been used in the last 30 years for the treatment of early onset scoliosis (EOS with variable success rates. We report the results of treatment of EOS with a newly developed hybrid rod distraction system applied to the rib cage and spine with a nonfusion technique in a prospective multicenter clinical trial. Materials and Methods: A total of 22 patients affected by progressive EOS resistant to cast and/or brace treatment were enrolled from 2004 to 2005 after informed consent into a trial of surgical treatment with a single spine-to-rib growing rod instrumentation growing spine profiler (GSP. Curves> 60° Cobb in the frontal plane or bending < 50% were addressed with staged anterior annulotomy and fusion and posterior implantation of a GSP rod. Less severe and rigid curves were treated with posterior implantation of GSP only. The elongation of GSP was planned according to spinal growth. Patients were kept in a brace between elongations. Results: A total of 20 patients were available to follow-up with complete data. The mean follow up is 4.1 years. Mean age at time of initial surgery was 5 years (3-8. Nine patients had staged antero-posterior surgeries, 11 posterior only surgeries. Mean spinal growth was 1.9 cm (1.5-2.3 or 0.5 cm per year. Mean coronal Cobb′s angle correction was from 56° to 45°. Major complications affected 40% of patients and included rod failure in 6/20 and crankshaft in 5/20 (all in the anteroposterior surgery group. Conclusion: Treatment of EOS with spine-to-rib growing rod in the present form provides similar correction and complication rates to those published in the series considering traditional single or dual growing rod systems. Based on this, the authors recommend revision of the GSP design and a new clinical trial to test safety and efficacy.

  16. Self-assembled microsphere gratings on rib waveguides

    OpenAIRE

    Tai, Chao-Yi; Unal, Bayram; Wilkinson, James S.; Mohamed A. Ghanem; Bartlett, Philip N.

    2003-01-01

    We report the spectral transmission of a rib waveguide side-coupled to a self-assembled polystyrene microsphere array. A transmission stopband was observed at ? ~ 1590nm, showing the potential for realising wavelength-selective devices

  17. MASQUERADE SINDROM AND ACROMIC CUTANEOUS MELANOMA - CASE PRESENTATION

    Directory of Open Access Journals (Sweden)

    Camelia Bogdanici

    2010-08-01

    Full Text Available We would like to present the case of a 56 yo patient diagnosed initially with bilateral keratouveitis with positive cytomegalovirus that presented several relapses. Eye examination was undertaken on September 2006 in the 1st Department of the Ophtalmology Clinic, St Spiridon Emergency Hospital in Iasi. The diagnosis of Bilateral Recurrent Panuveitis was established without knowing the precise etiology – although extensive clinical and biological tests were performed. In the following months a lump in the right armpit was revealed leading to the supposition of malignant mastitis. Dermatological consultation disclosed the presence of a periumbilical nevus that grows in time and undergoes depigmentation. Biopsy of the adenopathy and pathological examination on paraffin established the diagnosis of Acromic Malignant Melanoma. The symptoms of bilateral panuveitis reappears, therefore we concluded that there is a possibility of a Masquerade Syndrom. Despite undergoing surgery and chemotherapy for the adenopatic mass, there was an unfavorable course with the relapse of the malignant lymphoma within 6 months at the right dorsal muscle; surgery was again undertaken. After 1 year several brain metastasis were depicted and the patient died within 1 year and a half from the initial diagnosis.

  18. Anaphylaxis to protamine masquerading as an insulin allergy.

    Science.gov (United States)

    Kim, R

    1993-01-01

    This is the case of a 62-year-old man referred for the evaluation of insulin allergy. This patient had reacted to the subcutaneous injection of Novolin 70/30 (Squibb, Princeton, N.J.) and Humulin NPH (Eli Lilly, Indianapolis, Ind.). These reactions were characterized by the immediate onset of diffuse pruritic urticaria and angioedema with progression to hypotension as well as a local reaction. Past history also included anaphylactic shock after intravenous administration of protamine sulfate used for heparin reversal during arterial bypass surgery. Immediate hypersensitivty skin testing to protamine containing (NPH) insulin and protamine sulfate USP were strongly positive, while Lente insulin (Eli Lilly, Indianapolis, Ind.) and controls were negative. RAST tests revealed the titers > 24 ng/ml of protamine specific IgE with 98 percent inhibition and 1163 ng/ml of protamine specific IgG with 29 percent inhibition, while levels of insulin specific antibodies were negligible. Subsequently, the patient was treated with non-protamine containing insulin preparation, Lente insulin, without further incident. This study confirms the diagnosis of Type I hypersensitivity to protamine sulfate masquerading as insulin allergy. PMID:8454092

  19. Appendiceal Diverticulitis Clinically Masquerading as an Appendiceal Carcinoma

    Directory of Open Access Journals (Sweden)

    Tadashi Terada

    2014-01-01

    Full Text Available Appendiceal diverticulosis is a rare condition. Herein reported is a case of appendiceal diverticulosis and diverticulitis clinically masquerading as appendiceal carcinoma. A 62-year-old woman presented with abdominal pain. US and CT showed a tumor measuring 5 × 4 × 4 cm in vermiform appendix. Colon endoscopy showed mucosal elevation and irregularity in the orifice of vermiform appendix. A biopsy of the appendiceal mucosa showed no significant changes. Clinical diagnosis was appendiceal carcinoma and wide excision of terminal ileum, appendix, cecum, and ascending colon was performed. Grossly, the appendix showed a tumor measuring 5 × 3 × 4 cm. The appendiceal lumen was opened, and the appendiceal mucosa was elevated and irregular. The periappendiceal tissue showed thickening. Microscopically, the lesion was multiple appendiceal diverticula. The diverticula were penetrating the muscle layer. The mucosa showed erosions in places. Much fibrosis, abscess formations, and lymphocytic infiltration were seen in the subserosa. Abscesses were also seen in the diverticular lumens. Some diverticula penetrated into the subserosa. The pathologic diagnosis was appendiceal diverticulitis. When they encounter an appendiceal mass, clinicians should consider appendiceal diverticulitis as a differential diagnosis.

  20. Huntington’s disease masquerading as spinocerebellar ataxia

    Science.gov (United States)

    Rodríguez-Quiroga, Sergio Alejandro; Gonzalez-Morón, Dolores; Garretto, Nelida; Kauffman, Marcelo Andres

    2013-01-01

    Huntington’s disease (HD) is a neurodegenerative disorder of the central nervous system characterised by the presence of choreic abnormal movements, behavioural or psychiatric disturbances and dementia. Noteworthy, despite atypical motor symptoms other than chorea have been reported as initial presentation in some patients, a very few number of HD patients, presenting at onset mostly cerebellar dysfunction masquerading dominant spinocerebellar ataxias (SCA), were occasionally reported. We report the case of a 42-year-old man with a 5-year history of gait disturbance, dysarthria and cognitive impairment and familial antecedents of dementia and movement disorders. Initially the clinical picture suggested the diagnosis of a dominant SCA, but finally a diagnosis of HD was made based on the molecular evidence of abnormal 39 Cytosine-Adenine-Guanine (CAG) repeats in exon 1 of Huntingtin gene. The authors highlight the importance of suspecting HD in the aetiology of spinocerebellar ataxias when dementia is a prominent feature in the proband or their family. PMID:23853009

  1. Post-accelerator LINAC design for the VECC RIB project

    Indian Academy of Sciences (India)

    Arup Bandyopadhyay

    2002-12-01

    Variable Energy Cyclotron Centre (VECC) is presently developing an ISOL post-acclerator type of RIB facility. The scheme utilises the existing = 130 room temperature variable energy cyclotron machine as the primary accelerator for the production of RIBs and radio frequency quadrupole (RFQ) and LINAC modules for the post-acceleration. The design aspects of these postaccelerator LINAC modules will be discussed in this paper.

  2. Upper extremity and rib stress fractures in a child

    International Nuclear Information System (INIS)

    Stress fractures in children are rare compared with the incidence in [ults. This report describes an 11-year-old girl with stress fractures of the acromion, clavicle, and first rib on the left and contralateral fractures of the first and second ribs. It was eventually discovered that these fractures were caused by a nervous tic consisting of repetitive, vigorous shrugging and translation of the shoulders. (orig.)

  3. Case report: Short rib polydactyly syndrome - type 2 (Majewski syndrome)

    International Nuclear Information System (INIS)

    Short rib polydactyly syndrome (SRPS) type 2 (Majewski syndrome) is a rare inherited, autosomal recessive, lethal skeletal dysplasia characterized by horizontally located short ribs, pre- and postaxial polysyndactyly, and micromelia, with characteristic short ovoid tibiae. There may or may not be visceral involvement. We report a case of SRPS type 2 that was diagnosed by antenatal USG at 28 weeks of gestation; the diagnosis was subsequently confirmed by postnatal radiography, fetal autopsy, and histopathology

  4. Lower thoracic rib stress fractures in baseball pitchers.

    Science.gov (United States)

    Gerrie, Brayden J; Harris, Joshua D; Lintner, David M; McCulloch, Patrick C

    2016-01-01

    Stress fractures of the first rib on the dominant throwing side are well-described in baseball pitchers; however, lower thoracic rib fractures are not commonly recognized. While common in other sports such as rowing, there is scant literature on these injuries in baseball. Intercostal muscle strains are commonly diagnosed in baseball pitchers and have a nearly identical presentation but also a highly variable healing time. The diagnosis of a rib stress fracture can predict a more protracted recovery. This case series presents two collegiate baseball pitchers on one team during the same season who were originally diagnosed with intercostal muscle strains, which following magnetic resonance imaging (MRI) were found to have actually sustained lower thoracic rib stress fractures. The first sustained a stress fracture of the posterior aspect of the right 8th rib on the dominant arm side, while the second presented with a left-sided 10th rib stress fracture on the nondominant arm side. In both cases, MRI was used to visualize the fractures as plain radiographs are insensitive and commonly negative early in patient presentation. Patients were treated with activity modification, and symptomatic management for 4-6 weeks with a graduated return to throwing and competition by 8-10 weeks. The repetitive high stresses incurred by pitching may cause either dominant or nondominant rib stress fractures and this should be included in the differential diagnosis of thoracic injuries in throwers. It is especially important that athletic trainers and team physicians consider this diagnosis, as rib fractures may have a protracted course and delayed return to play. Additionally, using the appropriate imaging techniques to establish an accurate diagnosis can help inform return-to-play decisions, which have important practical applications in baseball, such as roster management and eligibility. PMID:26559562

  5. Unusual rib tumor: Parosteal lipoma with extensive osteochondromatous metaplasia

    Directory of Open Access Journals (Sweden)

    Sathe Pragati

    2008-10-01

    Full Text Available Lipomas of the bone usually occur in the long bones and are seen in the fifth to seventh decade of life. Rib lipomas are rare and those having parosteal location are even rarer. We report a case of parosteal lipoma of the rib in a young male with some unique features. This is the fifth case of its kind to be reported in literature.

  6. Nasal reconstruction with articulated irradiated rib cartilage

    International Nuclear Information System (INIS)

    Nasal structural reconstruction is a formidable task in cases where there is loss of support to both the nasal dorsum and tip. A multitude of surgical approaches and materials have been used for the correction of the saddle-nose deformity with varying degrees of success. Articulated irradiated rib cartilage inserted through an external rhinoplasty approach was used to reconstruct nasal deformities in 18 patients over a 6-year period. Simultaneous use of a midline forehead flap to reconstruct the overlying soft tissue was required in four cases. Follow-up ranged from 1 to 6 years (mean, 2.8 years). Results were rewarding in most cases with marked improvement in nasal support and airway. Revision and/or replacement secondary to trauma or warping of the graft was required in four cases. None of the patients exhibited infection, extrusion, or noticeable resorption. A description of the surgical technique, review of all the cases, and recommendation for continued use of this graft material are discussed

  7. Nasal reconstruction with articulated irradiated rib cartilage

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, C.S.; Cook, T.A.; Guida, R.A. (Univ. of Washington School of Medicine, Seattle (USA))

    1991-03-01

    Nasal structural reconstruction is a formidable task in cases where there is loss of support to both the nasal dorsum and tip. A multitude of surgical approaches and materials have been used for the correction of the saddle-nose deformity with varying degrees of success. Articulated irradiated rib cartilage inserted through an external rhinoplasty approach was used to reconstruct nasal deformities in 18 patients over a 6-year period. Simultaneous use of a midline forehead flap to reconstruct the overlying soft tissue was required in four cases. Follow-up ranged from 1 to 6 years (mean, 2.8 years). Results were rewarding in most cases with marked improvement in nasal support and airway. Revision and/or replacement secondary to trauma or warping of the graft was required in four cases. None of the patients exhibited infection, extrusion, or noticeable resorption. A description of the surgical technique, review of all the cases, and recommendation for continued use of this graft material are discussed.

  8. Anterior approaches to the upper thoracic spine

    International Nuclear Information System (INIS)

    The upper thoracic spine region is difficult to access from an anterior approach because of the surrounding bones (ribs, sternum and scapulae) and organs (heart, lung and great vessels). The outcomes of 37 consecutive cases with lesions in the upper thoracic spine region (T1-4) were reviewed to study surgical approaches to the upper thoracic spine. We used anterior approaches in 13 cases. A full sternotomy was performed in 6 cases (5 cases ossification of posterior longitudinal ligament (OPLL), 1 case herniated disc), a high thoracotomy was performed in 6 cases (3 cases herniated disc, 2 cases spinal cord tumor, 1 case TB spine), and a partial resection of a unilateral sternoclavicular joint was performed in 1 case. A sternotomy is thought to be useful for OPLL in the T1-3 region, whereas a high thoracotomy is recommended for unilateral anterior lesions and lesions extending below the T3/4 level. Reconstructive CT sagittal images can supply useful anatomical informations for selecting a surgical approach. (author)

  9. Analysis of the current rib support practices and techniques in U.S. coal mines

    Institute of Scientific and Technical Information of China (English)

    Mohamed Khaled M.; Murphy Michael M.; Lawson Heather E.; Klemetti Ted

    2016-01-01

    Design of rib support systems in U.S. coal mines is based primarily on local practices and experience. A better understanding of current rib support practices in U.S. coal mines is crucial for developing a sound engineering rib support design tool. The objective of this paper is to analyze the current practices of rib control in U.S. coal mines. Twenty underground coal mines were studied representing various coal basins, coal seams, geology, loading conditions, and rib control strategies. The key findings are:(1) any rib design guideline or tool should take into account external rib support as well as internal bolting;(2) rib bolts on their own cannot contain rib spall, especially in soft ribs subjected to significant load—external rib control devices such as mesh are required in such cases to contain rib sloughing;(3) the majority of the studied mines follow the overburden depth and entry height thresholds recommended by the Program Information Bulletin 11-29 issued by the Mine Safety and Health Administration;(4) potential rib insta-bility occurred when certain geological features prevailed—these include draw slate and/or bone coal near the rib/roof line, claystone partings, and soft coal bench overlain by rock strata;(5) 47%of the stud-ied rib spall was classified as blocky—this could indicate a high potential of rib hazards;and (6) rib injury rates of the studied mines for the last three years emphasize the need for more rib control management for mines operating at overburden depths between 152.4 m and 304.8 m.

  10. VTT's micron-scale silicon rib+strip waveguide platform

    Science.gov (United States)

    Aalto, Timo; Harjanne, Mikko; Cherchi, Matteo

    2016-05-01

    Silicon rib waveguides enable single-mode (SM) operation even with the combination of multi-micron core dimensions and high refractive index contrast. In such large waveguides the optical mode field is almost completely confined inside the Si core, which leads to small propagation losses and small polarization dependency. The unique SM condition of the rib waveguide also enables the use of an ultra-wide wavelength range, for example from 1.2 to polarizations. Another alternative is a total-internal reflection mirror that can have loss as low as 0.1 dB for both polarizations in either strip or rib waveguides. The excitation of higher order modes in large strip waveguides is avoided by using adiabatic rib-strip converters and low-loss components. With rib and strip waveguides it is possible to reach a unique combination of low loss, extremely small footprint, small polarization dependency, ultra-wide bandwidth and tolerance to high optical powers.

  11. Muscle: Bone ratios in beef rib sections.

    Science.gov (United States)

    Dolezal, H G; Murphey, C E; Smith, G C; Carpenter, Z L; McCartor, M

    1982-01-01

    Thirty-eight steers and thirty heifers (14 to 17 months of age, from F(1) Hereford × Brahman cows bred to Angus or Hereford bulls), were either forage-fed for 123 days on millet-bermudagrass pasture or grain-fed for 90 days on a high-concentrate diet and were then commercially slaughtered. Warm carcass weights ranged from 167·8 kg to 324·3 kg. At 24 h post mortem, Texas Agricultural Experiment Station personnel (1) assigned scores or took measurements on each carcass for all factors used in yield grading and quality grading, (2) measured the length of hind leg (HL) and carcass length (CL) and (3) assigned a score for carcass muscling (MS) and, as appropriate, made an adjusted longissimus muscle area (ALA) evaluation. The 9th-10th-11th rib section from one side of each carcass was physically separated into longissimus muscle, fat, 'other soft tissue' and bone and ether extract determinations of the longissimus muscle and 'other soft tissue' components were made and used to adjust the yields of each of these components to a fat-free basis. Muscle to bone ratios ranged from 2·38 to 4·37. With both age and carcass weight held constant, diet, breed and sex explained only 35·8% of the variation in muscle to bone ratio. The best simple correlation with muscle to bone ratio was ALA/CL (r = ·59). Other measures significantly correlated with muscle to bone ratio included ALA (r = 0·55), MS (r = 0·50) and carcass weight (r = 0·49). Multiple regression analyses identified a three-variable subset comprised of ALA, carcass weight and CL which was related (P < 0·01) to muscle to bone ratio R(2) = 0·41). Data suggest that muscle to bone ratios differ widely among beef carcasses of similar genetic-management history and that there are carcass measures useful for predicting muscle to bone ratio. PMID:22054706

  12. Non-diffuseness of vibration fields in ribbed plates

    DEFF Research Database (Denmark)

    Brunskog, Jonas; Chung, Hyuck

    2011-01-01

    This paper presents numerical simulations of structural intensity in a rib-reinforced plate, investigating the diffuseness. Many prediction models of building and structural acoustics, such as statistical energy analysis or energy flow methods, assume the vibrational wave fields to be diffuse....... However, the diffuseness assumption is not always valid. One such example is a rib-reinforced plate typically found in a lightweight floor with wooden joists. Other examples can be found in aircraft and ship structures. The structural intensity of a ribbed plate is computed at low to mid frequencies using...... the Fourier sine expansion of the transverse displacement of the plate. Hamilton's principle is used in combination with thin plate theory and Euler beam theory. The model takes into account interactions between components. The Fourier sine modes are re-formulated as plane waves in a radial coordinate...

  13. Production of high-intensity RIB at SPES

    International Nuclear Information System (INIS)

    The SPES Project at INFN Laboratori Nazionali di Legnaro SPES Technichal Design Report - (www.lnl.infn.it/~spes/TDR2008/) is now in its early construction phase. SPES is an ISOL type Radioactive Ion Beam (RIB) J.Khalili, E. Roeckl, The Euroschool Lect. on Phys. with Exotic Beams, Vol. II, Springer (2006) facility for the production of neutron-rich radioactive nuclei by uranium fission. RIBs will be produced by proton induced fission on a UCx multi foil direct target at a rate of 1013 fps, more than one order of magnitude larger than the currently available beam intensities. The recent developments on the production, ionization and acceleration of RIBs at SPES are hereafter presented.

  14. Rib osteomyelitis in children. Early radiologic and ultrasonic findings

    International Nuclear Information System (INIS)

    The earliest radiographic changes of osteomyelitis in the long bones is deep-seated edema manifesting as soft tissue swelling and obliteration of the intermuscular planes adjacent to the affected bone. Similarly, the early change of rib osteomyelitis is pericostal edema demonstrated by soft tissue swelling of the thoracic wall accompanied by an adjacent inward pleural displacement. In both osteomyelitis of the rib and the long bones, the bony changes will appear 1-2 weeks later. Pericostal edema can be readily diagnosed by ultrasound scan. Pericostal edema, although non specific and can occur in other conditions, yet it is a strong warning sign, set wihin the overall clinical picture of osteomyelitis. (orig.)

  15. Sternoplasty and rib distraction in neonatal Jeune syndrome.

    LENUS (Irish Health Repository)

    Conroy, Eimear

    2010-09-01

    A 12-week-old boy with Jeune syndrome (asphyxiating thoracic dystrophy) was referred to the orthopaedic unit with progressive respiratory failure, recurrent respiratory tract infections, and recurrent admissions to the intensive care unit for ventilatory support. His chest x-ray revealed a small and narrow thoracic cage with short broad ribs and abnormal costal cartilages. His chest expansion was impaired by the short, horizontally positioned ribs resulting in alveolar hypoventilation. Without surgical intervention to expand his thoracic cage, he would die of respiratory failure.

  16. Breathing Thorax Simulation based on Pleura Behaviour and Rib Kinematics

    OpenAIRE

    Didier, Anne-Laure; Villard, Pierre-Frédéric; Bayle, Jean-Yves; Beuve, Michaël; Shariat, Behzad

    2007-01-01

    To monitor a lung mechanical model and then predict tumour motion we proposed a approach based on the pleura physiology. By comparing the predictions to landmarks set by medical experts, we observed better results with regards to the one obtained with approaches found in the literature. Beside, we focus on the rib cage kinematics, which play a significant role in the pleura outer-surface motion and therefore in the lung motion. We proposed a kinematic model of the rib cage based on the finite...

  17. Bilateral anterior shoulder dislocation

    OpenAIRE

    Meena, Sanjay; Saini, Pramod; Singh, Vivek; Kumar, Ramakant; Trikha, Vivek

    2013-01-01

    Shoulder dislocations are the most common major joint dislocations encountered in the emergency departments. Bilateral shoulder dislocations are rare and of these, bilateral posterior shoulder dislocations are more prevalent than bilateral anterior shoulder dislocations. Bilateral anterior shoulder dislocation is very rare. We present a case of 24-year-old male who sustained bilateral anterior shoulder dislocation following minor trauma, with associated greater tuberosity fracture on one side...

  18. Synovial sarcoma of the neck masquerading as a malignant second branchial cleft cyst

    OpenAIRE

    Teng, Yao-Shu; Lin, Zhi-Hong; Li, Yong; Cao, Xiao-lin; Lin, Feng-Chun; Xiang, Jing-Jing

    2013-01-01

    Synovial sarcoma is an uncommon, aggressive malignant tumor of the soft tissues primarily involving the extremities of young adults. Head and neck synovial sarcoma is rare, and its diagnosis and therapy are still challenging.We report a case of a young patient with synovial sarcoma, clinically masquerading as cystic mass of the neck and malignant second branchial cleft cyst. The pathological diagnosis of the sarcoma was confirmed by a multimodality diagnostic protocol, including histological,...

  19. Congenital cystic disorders of lung masquerading as complicated pneumonia and pneumothorax: A case series

    OpenAIRE

    Nandi, Madhumita; Mondal, Rakesh

    2013-01-01

    Abstract. Congenital cystic adenomatoid malformation and congenital lobar emphysema are rare embryonic congenital disorders of lung. We report seven such cases of congenital cystic pulmonary disorders out of which, four cases were of congenital cystic adenomatoid malformation and three cases of congenital lobar emphysema. All cases presented with recurrent or persistent pulmonary infection and pneumothorax. These cases had been masquerading as pneumonia and/ or its complication and were treat...

  20. Allergic contact dermatitis to Plectranthus amboinicus masquerading as chronic leg ulcer.

    Science.gov (United States)

    Chang, Shyue-Luen; Chang, Ya-Ching; Yang, Chin-Hsun; Hong, Hong-Shang

    2005-12-01

    This report discusses a case of a 69-year-old woman who developed chronic non-healing leg ulcers after long-term topical use of Plectranthus amboinicus. The ulcer was proven to be allergic contact dermatitis to P. amboinicus by a patch test. The ulcer healed after discontinuation of P. amboinicus. To the best of our knowledge, this is the first reported case of allergic contact dermatitis to P. amboinicus masquerading as chronic leg ulcer. PMID:16364130

  1. Endometrial Adenocarcinoma Metastatic to the Colon Masquerading as a Primary Colon Cancer

    Directory of Open Access Journals (Sweden)

    Michael J. Anstadt

    2012-04-01

    Full Text Available While the majority of colonic malignancies represent primarytumors, secondary tumors are not uncommon. We present a case ofendometrial cancer metastatic to the colon masquerading as a primarycolonic adenocarcinoma. The clinical and pathologic characteristicsof each disease are discussed. To our knowledge, this is the firstreported case of endometrial cancer metastasis to the colon in theabsence of endometriosis. It demonstrates the importance of usingimmunohistochemistry to distinguish morphologically similar tumorsin a patient who seemingly presents with more than one primarymalignancy.

  2. Porphyria Cutanea Tarda Masquerading as Epidermolysis Bullosa Acquisita: A Report of Two Cases

    OpenAIRE

    Deen, Kristyn; Wu, Jason

    2015-01-01

    Porphyria cutanea tarda (PCT) is the most common type of porphyria worldwide and is often initially diagnosed when cutaneous manifestations arise. We present two patients where misdiagnosis of PCT occurred due to the condition masquerading as epidermolysis bullosa acquisita histologically. In patients with undifferentiated bullous/erosive skin conditions occurring in photo-distributed regions, PCT should be considered in the differential diagnosis irrespective of histopathological findings on...

  3. Detection of Masqueraded Wireless Access Using 802.11 MAC Layer Fingerprints

    OpenAIRE

    Idland, Christer; Jelle, Thomas; Mjølsnes, Stig Frode

    2013-01-01

    Many wireless Internet access operators prefer open local area network (WLAN) access because this reduces the need for user assistance for a variety of smaller devices. A 802.11 MAC spoofer masquerades as an authorized user and gains access by using an already whitelisted MAC address. We consider the scenario where the spoofer waits until the authorized user has finished the session, and then uses the still whitelisted MAC address for the network access. We propose and experiment with “implem...

  4. Nocardia farcinica Meningitis Masquerading as Central Nervous System Metastasis in a Child With Cerebellar Pilocytic Astrocytoma.

    Science.gov (United States)

    Davis, Jennifer; Kreppel, Andrew J; Brady, Rebecca C; Jones, Blaise; Stevenson, Charles B; Fouladi, Maryam; Hummel, Trent R

    2015-08-01

    Juvenile pilocytic astrocytoma, the most common pediatric central nervous system (CNS) neoplasm, characteristically displays an indolent growth pattern and rarely demonstrates metastatic dissemination. Reports of infections mimicking CNS metastatic disease are also rare and can impact treatment. We report the youngest known case of a child with a CNS Nocardia farcinica infection who had a known cerebellar pilocytic astrocytoma, review other infections that may masquerade as CNS neoplasms, and discuss N. farcinica CNS infections. PMID:26181420

  5. Acute rib fracture diagnosis in an infant by US: a matter of child protection

    Energy Technology Data Exchange (ETDEWEB)

    Kelloff, Jennifer; Spivey, Maria [Washington University School of Medicine, Department of Pediatrics, Section on Child Abuse and Neglect, St. Louis Children' s Hospital, One Children' s Place, Box 8116, St. Louis, MO (United States); Hulett, Rebecca [Washington University School of Medicine, Department of Radiology, St. Louis Children' s Hospital, St. Louis, MO (United States)

    2009-01-15

    Rib fractures in infants and children are highly specific for inflicted injury in the absence of a major accidental injury or underlying bone disorder. We present a 9-week-old infant diagnosed with an acute rib fracture by US at the site where physicians palpated chest wall crepitus when no rib fractures had been visualized on the skeletal survey, including oblique views of the ribs. Based on the US diagnosis of the acute rib fracture the infant was taken into protective custody. Follow-up skeletal survey 2 weeks later revealed healing fractures of the left 6th and 7th posterolateral ribs and right 7th, 8th and 9th anterolateral ribs. We were unable to locate previous reports describing the diagnosis of rib fractures in infants by US. (orig.)

  6. Acute rib fracture diagnosis in an infant by US: a matter of child protection

    International Nuclear Information System (INIS)

    Rib fractures in infants and children are highly specific for inflicted injury in the absence of a major accidental injury or underlying bone disorder. We present a 9-week-old infant diagnosed with an acute rib fracture by US at the site where physicians palpated chest wall crepitus when no rib fractures had been visualized on the skeletal survey, including oblique views of the ribs. Based on the US diagnosis of the acute rib fracture the infant was taken into protective custody. Follow-up skeletal survey 2 weeks later revealed healing fractures of the left 6th and 7th posterolateral ribs and right 7th, 8th and 9th anterolateral ribs. We were unable to locate previous reports describing the diagnosis of rib fractures in infants by US. (orig.)

  7. Rib stress fractures among rowers: definition, epidemiology, mechanisms, risk factors and effectiveness of injury prevention strategies.

    Science.gov (United States)

    McDonnell, Lisa K; Hume, Patria A; Nolte, Volker

    2011-11-01

    velocity, sequential movement patterns, higher elbow-flexion to knee-extension strength ratios, higher seat-to-handle velocity during the initial drive, or higher shoulder angle excursion may result in RSF. Gearing may indirectly affect rib loading. Increased risk may be due to low calcium, low vitamin D, eating disorders, low testosterone or use of depot medroxyprogesterone injections. Injury management involves 1-2 weeks cessation of rowing with analgesic modalities followed by a slow return to rowing with low-impact intensity and modified pain-free training. Some evidence shows injury prevention strategies should focus on strengthening the serratus anterior, strengthening leg extensors, stretching the lumbar spine, increasing hip joint flexibility, reducing excessive protraction, training with ergometers on slides or floating-head ergometers, and calcium and vitamin D supplementation. Future research should focus on the epidemiology of RSF over 4-year Olympic cycles in elite rowers, the aetiology of the condition, and the effectiveness of RSF prevention strategies for injury incidence and performance in rowing. PMID:21985212

  8. An anatomical evaluation of the serratus anterior plane block.

    Science.gov (United States)

    Mayes, J; Davison, E; Panahi, P; Patten, D; Eljelani, F; Womack, J; Varma, M

    2016-09-01

    The serratus anterior plane block has been described for analgesia of the hemithorax. This study was conducted to determine the spread of injectate and investigate the anatomical basis of the block. Ultrasound-guided serratus anterior plane block was performed on six soft-fix embalmed cadavers. All cadavers received bilateral injections, on one side performed with 20 ml latex and on the other with 20 ml methylene blue. Subsequent dissection explored the extent of spread and nerve involvement. Photographs were taken throughout dissection. The intercostal nerves were involved on three occasions with dye, but not with latex. The lateral cutaneous branches of the intercostal nerve contained dye and latex on all occasions. The serratus plane block appears to be mediated through blockade of the lateral cutaneous branches of the intercostal nerves. Anatomically, serratus plane block does not appear to be equivalent to paravertebral block for rib fracture analgesia. PMID:27440171

  9. Rib fracture in a horse during an endurance race.

    Science.gov (United States)

    Trigo, Pablo; Muñoz, Ana; Castejón, Francisco; Riber, Cristina; Hassel, Diana M

    2011-11-01

    We describe a fatal case, in which a horse suffered a fall and as a consequence, rib fractures. Diagnosis was made postmortem and the horse died without showing clear signs of respiratory dysfunction. The retrospective reports of injuries can be important to reduce these traumatic events and to avoid fatalities. PMID:22547844

  10. Single-transverse-mode Ti:sapphire rib waveguide laser

    NARCIS (Netherlands)

    Grivas, C.; Shepherd, D.P.; May-Smith, T.C.; Eason, R.W.; Pollnau, M.

    2005-01-01

    Laser operation of Ti:sapphire rib waveguides fabricated using photolithography and ion beam etching in pulsed laser deposited layers is reported. Polarized laser emission was observed at 792.5 nm with an absorbed pump power threshold of 265 mW, which is more than a factor of 2 lower in comparison t

  11. Multi-start helically ribbed fuel pins for CAGR

    International Nuclear Information System (INIS)

    The heat transfer performance of the current reference design CAGR fuel is achieved by roughening the fuel pins with transverse or single-start helical ribs about 0.25 mm high and 2 mm pitch. By machining helical ribs with several starts the so called multi-start helically ribbed fuel pin is produced. These ribs present themselves at a significant angle to the direction of coolant flow and impart a 'swirl' to it. Early test work showed that the multi-start surface could give intrinsically better cluster heat transfer than the reference design surface for a given pressure drop. Furthermore the 'swirl' significantly increases gas mixing, especially when pins of opposite hand are arranged in adjacent positions in the fuel cluster. Thus reduced systematic and random heat transfer factors arise from less sensitivity to variations in dimensions and flux distributions. This leads to lower fuel pin temperatures. This paper shows how the experimental loading of multi-start fuel in Hunterston B was developed and discusses the advantages. It also indicates how further gains can be achieved and puts forward suggestions for the next steps in the development of multi-start fuel. (author)

  12. Comparison of Computed Tomography and Chest Radiography in the Detection of Rib Fractures in Abused Infants

    Science.gov (United States)

    Wootton-Gorges, Sandra L.; Stein-Wexler, Rebecca; Walton, John W.; Rosas, Angela J.; Coulter, Kevin P.; Rogers, Kristen K.

    2008-01-01

    Purpose: Chest radiographs (CXR) are the standard method for evaluating rib fractures in abused infants. Computed tomography (CT) is a sensitive method to detect rib fractures. The purpose of this study was to compare CT and CXR in the evaluation of rib fractures in abused infants. Methods: This retrospective study included all 12 abused infants…

  13. Polarized single-mode condition for SOI rib waveguide with large cross section

    Science.gov (United States)

    Yuan, Dengpeng; Dong, Ying; Liu, Yujin; Li, Tianjian; Zhang, Xudong; Tan, Yushan

    2015-08-01

    In this paper the single mode condition of silicon-on-insulator (SOI) rib waveguide with large cross section is investigated based on the effective index method (EIM) by using numerical computation and analytical derivation with the consideration of the polarization effects. A polarized single-mode condition for SOI rib waveguide with large cross section is presented, the results from analytical derivation are highly concordant with that from numerical computation. For the vertical single-mode condition, the deviations between HE and EH modes correlate oppositely with the total rib height of rib waveguide, and the critical rib height ratio gradually approaches but never equals to 0.5 with the increase of the total rib height. There, HE mode and EH mode are commonly known as quasi-transverse-electric (TE) mode and quasi-transverse-magnetic (TM) mode respectively. The deviation of the critical rib width between HE and EH modes for the lateral single-mode condition is relatively small, which is a function of the rib height ratio but irrelevant to the total rib height for the specified index profile. The fact that the total rib height, index profile, and polarization of modes have effects on the single-mode condition of SOI rib waveguide with large cross section was demonstrated in this work, which was not discussed in the previous works. The results in this work can give guidance to design, simulation and fabrication of SOI rib waveguide with large cross section in practical applications.

  14. Absence of uptake of the rib cage; diagnosis of a Poland's syndrome with the bone SPECT-CT; Absence de fixation du gril costal: diagnostic d'un syndrome de Poland par la TEMP-TDM osseuse

    Energy Technology Data Exchange (ETDEWEB)

    Granier, P.; Mourad, M. [Centre Hospitalier Antoine-Gayraud, Service de Medecine Nucleaire, 11 - Carcassonne (France)

    2008-09-15

    We report the case of a 37-year-old man, investigated for pains of the right upper limb impairing the hand, the wrist and the shoulder after a surgery for fracture of the radius and the scaphoid. The {sup 99m}Tc-H.D.P. three-phase bone scintigraphy confirmed the diagnosis of acute phase of a reflex sympathetic dystrophy. The delayed images highlighted a focal absence of tracer uptake of the left anterior rib cage. The single photon emission computerized tomography guided by computerized tomography showed that it was related to the absence of the anterior part of the third and the fourth left ribs highlighting an aplasia of the left pectoralis major muscle. These anomalies led to the diagnosis of congenital malformation in connection with a Poland's syndrome. The differential diagnosis of this syndrome resulted in discussing the multiple etiologies of the photopenic lesions of the rib cage. (authors)

  15. Anterior Cruciate Ligament (ACL) Injuries

    Science.gov (United States)

    ... Help a Friend Who Cuts? Anterior Cruciate Ligament (ACL) Injuries KidsHealth > For Teens > Anterior Cruciate Ligament (ACL) ... and Recovery Coping With an ACL Injury About ACL Injuries A torn anterior cruciate ligament (ACL) is ...

  16. Fixation of a human rib by an intramedullary telescoping splint anchored by bone cement.

    Science.gov (United States)

    Liovic, Petar; Šutalo, Ilija D; Marasco, Silvana F

    2016-09-01

    A novel concept for rib fixation is presented that involves the use of a bioresorbable polymer intramedullary telescoping splint. Bone cement is used to anchor each end of the splint inside the medullary canal on each side of the fracture site. In this manner, rib fixation is achieved without fixation device protrusion from the rib, making the splint completely intramedullary. Finite element analysis is used to demonstrate that such a splint/cement composite can preserve rib fixation subjected to cough-intensity force loadings. Computational fluid dynamics and porcine rib experiments were used to study the anchor formation process required to complete the fixation. PMID:26733094

  17. Unsteady flow patterns in the vicinity of heated wall-mounted transverse ribs.

    Science.gov (United States)

    Polidori, Guillaume; Padet, Jacques

    2002-10-01

    This paper deals with experimental modeling of the unsteady junction flow features in the vicinity of an isoflux heated wall with mounted insulated rectangular ribs representing three distinctive ribbed test geometries. Both flow visualizations and surface temperature distributions show that the blockage effect upstream of the ribs, as well as the presence of complex eddy structures inside the open cavities, significantly affect the heat transfer process. All the configurations indicate degraded heat transfer performance in the area close to the ribs and an enhancement just downstream from the last rib. PMID:12496017

  18. Optic Nerve Sheath Meningioma Masquerading as Optic Neuritis

    OpenAIRE

    Alroughani, R.; Behbehani, R

    2016-01-01

    Optic neuritis is a common presentation of demyelinating disorders such as multiple sclerosis. It typically presents with acute painful monocular vision loss, whereas chronic optic neuropathy can be caused by compressive lesions along the anterior visual pathway, genetic, toxic, or nutritional causes. We report an unusual presentation mimicking optic neuritis, which was subsequently diagnosed as optic nerve sheath meningioma (ONSM). Misinterpretation of white matter lesions on MRI of brain an...

  19. Anterior cervical plating

    Directory of Open Access Journals (Sweden)

    Gonugunta V

    2005-01-01

    Full Text Available Although anterior cervical instrumentation was initially used in cervical trauma, because of obvious benefits, indications for its use have been expanded over time to degenerative cases as well as tumor and infection of the cervical spine. Along with a threefold increase in incidence of cervical fusion surgery, implant designs have evolved over the last three decades. Observation of graft subsidence and phenomenon of stress shielding led to the development of the new generation dynamic anterior cervical plating systems. Anterior cervical plating does not conclusively improve clinical outcome of the patients, but certainly enhances the efficacy of autograft and allograft fusion and lessens the rate of pseudoarthrosis and kyphosis after multilevel discectomy and fusions. A review of biomechanics, surgical technique, indications, complications and results of various anterior cervical plating systems is presented here to enable clinicians to select the appropriate construct design.

  20. Anterior knee pain

    Science.gov (United States)

    Patellofemoral syndrome; Chondromalacia patella; Runner's knee; Patellar tendinitis; Jumper's knee ... or playing soccer). You have flat feet. Anterior knee pain is more ... skiers, bicyclists, and soccer players who exercise often ...

  1. Anterior knee pain

    Science.gov (United States)

    ... or playing soccer). You have flat feet. Anterior knee pain is more common in: People who are overweight People who have had a dislocation, fracture, or other injury to the kneecap Runners, jumpers, ...

  2. Perinatally lethal short rib-polydactyly syndromes. Pt. 1

    International Nuclear Information System (INIS)

    Thirteen newborns with lethal short rib-polydactyly (SRP) have been reviewed, 11 with SRP type 3 (Verma-Naumoff) and 2 with SRP tye 2 (Majewski). In the former group there were three sets of siblings. The excess of males with SRP type III (Verma-Naumoff) is confirmed in this present study. A high frequency of phenotypic females including sex-reversed constitutional males with SRP type 1 (Saldino-Noonan) is in marked contrast to these findings in SRP type 3. Possible hypotheses include variable expressivity in non-Majewski short rib-polydactyly syndromes with sex-reversed and constitutional female cases tending to show more severe phenotypic expression both in terms of major anomalies and skeletal dysplastic effects. (orig.)

  3. Nonepiphyseal Giant Cell Tumor of the Rib: A Case Report

    Directory of Open Access Journals (Sweden)

    Hippocrates Moschouris

    2012-01-01

    Full Text Available A case of a 32-year-old female patient with a giant cell tumor originating in the middle part of the left 10th rib is presented. On X-rays and CT, the tumor caused a well-defined osteolysis with nonsclerotic borders. On MRI, it exhibited intermediate signal intensity on T1 sequences and central high signal and peripheral intermediate signal on T2 sequences. On contrast-enhanced MR images both central and peripheral-periosteal enhancement was noted. Thanks to its small size ( cm, the lesion was easily resected en bloc with a part of the affected rib. The patient is free of recurrence for 3 years after the operation.

  4. Infantile cortical hyperostosis of the ribs (Caffey's disease)

    International Nuclear Information System (INIS)

    Infantile cortical hyperostosis (ICH), or Caffey's disease, first reported by Caffey and Silverman in 1945, is a benign condition characterized radiographically by corticoperiosteal thickening of bone with subperiosteal new bone formation. Sites of occurrence vary, with the mandible being involved in 75%-80% of cases. The following is a cae report of ICH limited to four contiguous ribs with no evidence of mandibular involvement. (orig.)

  5. Stress fracture of the first rib in a weightlifter.

    Science.gov (United States)

    Eng, John; Westcott, James; Better, Nathan

    2008-05-01

    A 20-year-old woman elite weightlifter presented with acute onset debilitating right shoulder pain while attempting the "clean and jerk." There was no previous relevant history, including no prior fracture in the region. Examination confirmed vague tenderness in the right supraclavicular fossa with no discernible neurologic or vascular deficit within the right arm. X-ray was normal. The patient had a bone scan, including SPECT, suggesting a fracture of the right first rib, subsequently confirmed on CT examination. PMID:18431162

  6. Reducing the morbidity involved in harvesting autogenous rib cartilage.

    Science.gov (United States)

    Siegert, Ralf; Magritz, Ralph

    2009-08-01

    Although the use of autogenous cartilage is the gold standard in auricular reconstruction, its main disadvantage is the morbidity due to harvesting the cartilage. This includes postoperative pain, visible scar, and possibly asymmetry and reduced stability of the thorax. To reduce all of these drawbacks, we describe some modifications that reduce pain to a low tolerable level, hide the scar invisibly in the submammary fold in females, and induce regeneration as well reestablish stability of the rib defect. PMID:19809948

  7. Exercise-induced rib stress fractures: potential risk factors related to thoracic muscle co-contraction and movement pattern

    DEFF Research Database (Denmark)

    Vinther-Knudsen, Archibald; Kanstrup, I-L; Christiansen, E;

    2006-01-01

    The etiology of exercise-induced rib stress fractures (RSFs) in elite rowers is unclear. The purpose of the study was to investigate thoracic muscle activity, movement patterns and muscle strength in elite rowers. Electromyographic (EMG) and 2-D video analysis were performed during ergometer rowing......+/-SEM, median and range). Further, RSF had greater co-contraction of m. serratus anterior and m. trapezius in the mid-drive phase (RSF: 47.5+/-3.4, 48.5 (35.8-60.2)% EMG signal overlap vs C: 30.8+/-6.5, 27.0 (11.2-61.6)%P=0.043). In addition, the RSF subjects showed a lower knee-extension to elbow...

  8. The effect of spacer ribs on Ledinegg type flow instabilities

    Energy Technology Data Exchange (ETDEWEB)

    Coutts, D.A.

    1993-09-09

    An experimental program has been completed which evaluated the effect of a flow obstruction in a heated channel on the onset of flow instability (OBI). The test channel was rectangular (80 {times} 3 mm), heated on one surface, and equipped with view ports. Tests were conducted in a flow controlled mode at heat fluxes of 370 kW/M{sup 2}, and 610 kW/m{sup 2}. Direct comparisons were made between the demand curve minimum for the unobstructed channel and a channel equipped with a 2.07 mm wide rib that was parallel to the flow and in contact with the heated surface. Data at OFI is presented in the nondimensional terms Of Q{sub ratio} (ratio of heat flux applied to heat flux required to achieve saturated liquid conditions at the exit), and the local Stanton number at the channel exit for each channel arrangement. The Q{sub ratio} and Stanton number values for the unobstructed channel and the rib equipped channel are then compared to produce an estimate of the rib effect.

  9. DiGeorge syndrome with vertebral and rib dysplasia

    Energy Technology Data Exchange (ETDEWEB)

    Puno-Cocuzza, C.; David, K.; Kogekar, N. [Brooklyn Hospital Center, NY (United States)

    1994-09-01

    DiGeorge syndrome results from defect in the development of the third and fourth pharyngeal pouches, and is characterized by conotruncal heart defects, aplasia or hypoplasia of thymus and parathyroid glands resulting in immune deficiency and hypocalcemia. Other associated abnormalities include renal, thyroid and diaphragmatic defects, oral clefting, etc. Etiologically, it is heterogeneous, with a microdeletion of 22q11 present in over 80% of cases. Our patient was born following a pregnancy complicated by insulin dependent gestational diabetes. There was truncus arteriosus type 2, absense of thymic shadow on CXR with severe deficiency of T cell function, and persistent hypocalcemia with low parathormone. Right kidney was absent. Dysplastic ribs including fused and bifid ribs were noted. Hypoplastic vertebrae and hemivertebrae were present through thoracic and lumbar regions. Chromosome analysis was normal, and metaphase FISH analysis with probe N25 representing locus D22S75 did not show any deletion of 22q11.2. The skeletal findings similar to these have not been previously reported in association with DiGeorge syndrome to our knowledge. Vertebral and rib abnormalities are known to occur with pregestational maternal diabetes. Maternal diabetes has also been suggested to be a possible etiology in a very small proportion of DiGeorge syndrome cases. It is possible that these findings occured together on account of gestational maternal diabetes in our case.

  10. Cytokeratin - positive rib osteosarcoma metastasizing to the small intestine

    Directory of Open Access Journals (Sweden)

    Hiroko Kuwabara

    2014-01-01

    Full Text Available Osteosarcoma (OS is a malignant tumor in which osteoid or bone is produced directly by tumor cells. Some OS cells are positive for cytokeratin (CK and epithelial membrane antigen by immunohistochemistry (IHC and this may lead to a misdiagnosis of metastatic carcinoma, particularly when the tumor location is unusual. On the other hand, gastrointestinal metastasis of OS is rare. We present the case of a 67-year-old Japanese man with a small intestinal intussusception due to metastasis of a CK-positive rib OS. The tumor cells were positive for CK, osteopontin and osteonectin by IHC and a diagnosis of a CK-positive chest wall OS metastasizing to the small intestine was considered. Osteoid or bone formation was histologically absent and therefore chest wall OS had to be differentially diagnosed from metastatic carcinoma of unknown origin. A postmortem histological analysis confirmed a rib OS. Awareness of CK-positive OS is important for making a correct diagnosis and for disease management and an immunohistochemical analysis of the tumor for expression of osteopontin and osteonectin may be used to support the diagnosis. In addition, this case shows that rib OS can metastasize to the gastrointestinal tract, albeit rarely, which may induce an intestinal intussusception.

  11. Circulation, bone scans, and tetracycline labeling in microvascularized and vascular bundle implanted rib grafts

    International Nuclear Information System (INIS)

    The circulation in microvascularized rib grafts has been compared with that in conventional rib grafts and in those augmented by a direct vascular bundle implantation into the bone grafts. A new experimental model has been designed to correlate vascular perfusion, bone scan patterns, tetracycline labeling, and histological findings in these bone grafts. Posterior microvascularized rib grafts were found to have a circulatory pattern identical to that of the normal rib. Failed microvascularized rib grafts were revascularized more slowly than conventional rib grafts. Vascular bundles implanted into rib grafts remained patent and increased the rate of revascularization. The stripping or preservation of periosteum had no observable effects on the rate or pattern of conventional rib graft revascularization. The circulation in rib grafts was accurately reflected in technetium 99 bone scans, as was the patency of the anastomoses of microvascularized rib grafts and of implanted vascular bundles. In contrast, tetracycline labeling was repeatedly observed in avascular areas of bone grafts and, therefore, is not a reliable indicator of bone graft circulation

  12. Heat transfer and friction factors in the ribbed square convergent and divergent channels

    Science.gov (United States)

    Lee, M. S.; Ahn, S. W.

    2016-06-01

    Heat transfer and friction factors are reported for the measurements of turbulent flows in the convergent and divergent square channels with one-sided ribbed wall as well as two opposite in-line ribbed walls. The study covers three different hydraulic diameter ratios between inlet and exit at the test section such as Dho/Dhi = 0.75, 1.0, and 1.33 and Reynolds numbers in the range of 25,000-79,000. The channels, composing of ten isolated copper sections in the length of test section of 1 m, have the hydraulic diameter of 87.5 mm for the straight channel (Dho/Dhi = 1.0); the rib height-to-hydraulic diameter is 0.114; the rib pitch-to-height ratio equals 10. On the contrary to public opinion that the friction factor depends on the portion of the ribbed area, the total friction factor in the two opposite ribbed walls are lower than in the one-sided ribbed wall in the divergent channel of Dho/Dhi = 1.33 because the total pressure, summing positive dynamic and negative static pressures, is acted. The results show that the two opposite ribbed divergent channel of Dho/Dhi = 1.33 provides the best heat transfer enhancement and the two opposite ribbed convergent channel of Dho/Dhi = 0.75 provides the worst friction factor enhancement, and the ribbed divergent channels are generally recommended.

  13. Enterobius vermicularis infestation masquerading as cervical carcinoma: A cytological diagnosis.

    Science.gov (United States)

    Raju, Kalyani; Verappa, Seema; Venkataramappa, Srinivas Murthy

    2015-01-01

    Although prevalence of Enterobius vermicularis (EV) infestation in Intestines ranges from 35% to 70%, its prevalence in female genital tract is not known despite several incidental findings. Acute inflammatory cells in the background of cervical Pap smear indicate infestation and should not be neglected as contamination. A 40-year-woman presented with white vaginal discharge persistent for past 1 year. Local examination showed hypertrophied cervix with eversion of both lips and hard consistency of the anterior lip of cervix. A clinical diagnosis of cervical carcinoma was made. However, cervical Pap smear indicated EV eggs in an inflammatory background, treatment to which resulted in completely recovery. PMID:26283859

  14. High-mass twins & resolution of the reconfinement, masquerade and hyperon puzzles of compact star interiors

    OpenAIRE

    Blaschke, David; Alvarez-Castillo, D. E.

    2015-01-01

    We aim at contributing to the resolution of three of the fundamental puzzles related to the still unsolved problem of the structure of the dense core of compact stars (CS): (i) the hyperon puzzle: how to reconcile pulsar masses of $2\\,$M$_\\odot$ with the hyperon softening of the equation of state (EoS); (ii) the masquerade problem: modern EoS for cold, high density hadronic and quark matter are almost identical; and (iii) the reconfinement puzzle: what to do when after a deconfinement transit...

  15. Preliminary study of rib articulated model based on dynamic fluoroscopy images

    Science.gov (United States)

    Villard, Pierre-Frederic; Escamilla, Pierre; Kerrien, Erwan; Gorges, Sebastien; Trousset, Yves; Berger, Marie-Odile

    2014-03-01

    We present in this paper a preliminary study of rib motion tracking during Interventional Radiology (IR) fluoroscopy guided procedures. It consists in providing a physician with moving rib three-dimensional (3D) models projected in the fluoroscopy plane during a treatment. The strategy is to help to quickly recognize the target and the no-go areas i.e. the tumor and the organs to avoid. The method consists in i) elaborating a kinematic model of each rib from a preoperative computerized tomography (CT) scan, ii) processing the on-line fluoroscopy image and iii) optimizing the parameters of the kinematic law such as the transformed 3D rib projected on the medical image plane fit well with the previously processed image. The results show a visually good rib tracking that has been quantitatively validated by showing a periodic motion as well as a good synchronism between ribs.

  16. Effect of Channel Orientation and Rib Pitch-to-Height Ratio on Pressure Drop in a Rotating Square Channel with Ribs on Two Opposite Surfaces

    Directory of Open Access Journals (Sweden)

    Prabhu S. V.

    2005-01-01

    Full Text Available The effect of channel orientation and rib pitch-to-height ratio on the pressure drop distribution in a rib-roughened channel is an important issue in turbine blade cooling. The present investigation is a study of the overall pressure drop distribution in a square cross-sectioned channel, with rib turbulators, rotating about an axis normal to the free stream. The ribs are configured in a symmetric arrangement on two opposite surfaces with a rib angle of 90 ∘ to the mainstream flow. The study has been conducted for three Reynolds numbers, namely, 13 000, 17 000, and 22 000 with the rotation number varying from 0– 0.38 . Experiments have been carried out for various rib pitch-to-height ratios ( P/e with a constant rib height-to-hydraulic diameter ratio ( e/D of 0.1 . The test section in which the ribs are placed on the leading and trailing surfaces is considered as the base case ( orientation angle= 0 ∘ , Coriolis force vector normal to the ribbed surfaces. The channel is turned about its axis in steps of 15 ∘ to vary the orientation angle from 0 ∘ to 90 ∘ . The overall pressure drop does not change considerably under conditions of rotation for the base case. However, for the other cases tested, it is observed that the overall pressure drop increases with an increase in the rotation number for a given orientation angle and also increases with an increase in the orientation angle for a given rotation number. This change is attributed to the variation in the separation zone downstream of the ribs due to the presence of the Coriolis force—local pressure drop data is presented which supports this idea. At an orientation angle of 90 ∘ (ribs on the top and bottom surfaces, Coriolis force vector normal to the smooth surfaces, the overall pressure drop is observed to be maximum during rotation. The overall pressure drop for a case with a rib pitch-to-height ratio of 5 on both surfaces is found to be the highest

  17. Congenital anterior urethral diverticulum.

    Science.gov (United States)

    Singh, Sanjeet Kumar; Ansari, Ms

    2014-09-01

    Congenital anterior urethral diverticulum (CAUD) may be found all along the anterior urethra and may present itself at any age, from infant to adult. Most children with this condition present with difficulty in initiating micturition, dribbling of urine, poor urinary stream, or urinary tract infection. A careful history will reveal that these children never had a good urinary stream since birth, and the telltale sign is a cystic swelling of the penile urethra. In this paper, we present two cases of CAUD that were managed by excision of the diverticulum with primary repair. PMID:26328174

  18. Diaphragm muscle shortening modulates kinematics of lower rib cage in dogs

    OpenAIRE

    Chu, Iris; Fernandez, Cristina; Rodowicz, Kathleen Allen; Lopez, Michael A.; Lu, Raymond; Hubmayr, Rolf D.; Boriek, Aladin M.

    2010-01-01

    We tested the hypothesis that diaphragm muscle shortening modulates volume displacement and kinematics of the lower rib cage in dogs and that posture and mode of ventilation affect such modulation. Radiopaque markers were surgically attached to the lower three ribs of the rib cage and to the midcostal region of the diaphragm in six dogs of ∼8 kg body masses, and the locations of these markers were determined by a biplane fluoroscopy system. Three-dimensional software modeling techniques were ...

  19. Focusing of high intensity ultrasound through the rib cage using a therapeutic random phased array

    OpenAIRE

    Bobkova, Svetlana; Gavrilov, Leonid; Khokhlova, Vera; Shaw, Adam; Hand, Jeffrey; ,

    2010-01-01

    A method for focusing high intensity ultrasound through a rib cage that aims to minimize heating of the ribs whilst maintaining high intensities at the focus (or foci) is proposed and tested theoretically and experimentally. Two approaches, one based on geometric acoustics and the other accounting for diffraction effects associated with propagation through the rib cage, are investigated theoretically for idealized source conditions. It is shown that for an idealized radiator the diffraction a...

  20. XROMM analysis of rib kinematics during lung ventilation in the green iguana, Iguana iguana.

    Science.gov (United States)

    Brainerd, Elizabeth L; Moritz, Sabine; Ritter, Dale A

    2016-02-01

    The three-dimensional rotations of ribs during breathing are typically described as bucket-handle rotation about a dorsoventrally oriented axis, pump-handle rotation about a mediolateral axis, and caliper rotation about a rostrocaudal axis. In amniotes with double-headed ribs, rib motion is constrained primarily to one degree-of-freedom (DOF) rotation about an axis connecting the two rib articulations. However, in Squamata, the ribs are single headed and the hemispherical costovertebral joints permit rotations with three DOF. In this study, we used X-ray reconstruction of moving morphology (XROMM ) to quantify rib rotation during deep breathing in four green iguanas. We found that rib rotation was strongly dominated by bucket-handle rotation, thus exhibiting nearly hinge-like motion, despite the potential for more complex motions. The vertebral and sternal segments of each rib did not deform measurably during breathing, but they did move relative to each other at a thin, cartilaginous intracostal joint. While standing still and breathing deeply, four individual iguanas showed variability in their rib postures, with two breathing around a highly inflated posture, and two breathing around a posture with the ribs folded halfway back. Bucket-handle rotations showed clear rostrocaudal gradients, with rotation increasing from the third cervical to the first or second dorsal rib, and then decreasing again caudally, a pattern that is consistent with the intercostal muscles in the rostral intercostal spaces being the primary drivers of inspiration. The constrained, primarily bucket-handle rotations observed here during breathing do not help to explain the evolution of permissive, hemispherical costovertebral joints in squamates from the more constrained, double-headed rib articulations of other amniotes. PMID:26596531

  1. Quantitative analysis of rib movement based on dynamic chest bone images: preliminary results

    Science.gov (United States)

    Tanaka, R.; Sanada, S.; Oda, M.; Mitsutaka, M.; Suzuki, K.; Sakuta, K.; Kawashima, H.

    2014-03-01

    Rib movement during respiration is one of the diagnostic criteria in pulmonary impairments. In general, the rib movement is assessed in fluoroscopy. However, the shadows of lung vessels and bronchi overlapping ribs prevent accurate quantitative analysis of rib movement. Recently, an image-processing technique for separating bones from soft tissue in static chest radiographs, called "bone suppression technique", has been developed. Our purpose in this study was to evaluate the usefulness of dynamic bone images created by the bone suppression technique in quantitative analysis of rib movement. Dynamic chest radiographs of 10 patients were obtained using a dynamic flat-panel detector (FPD). Bone suppression technique based on a massive-training artificial neural network (MTANN) was applied to the dynamic chest images to create bone images. Velocity vectors were measured in local areas on the dynamic bone images, which formed a map. The velocity maps obtained with bone and original images for scoliosis and normal cases were compared to assess the advantages of bone images. With dynamic bone images, we were able to quantify and distinguish movements of ribs from those of other lung structures accurately. Limited rib movements of scoliosis patients appeared as reduced rib velocity vectors. Vector maps in all normal cases exhibited left-right symmetric distributions, whereas those in abnormal cases showed nonuniform distributions. In conclusion, dynamic bone images were useful for accurate quantitative analysis of rib movements: Limited rib movements were indicated as a reduction of rib movement and left-right asymmetric distribution on vector maps. Thus, dynamic bone images can be a new diagnostic tool for quantitative analysis of rib movements without additional radiation dose.

  2. Amelanotic Melanoma Masquerading as a Granular Cell Lesion

    Directory of Open Access Journals (Sweden)

    Deepak Pandiar

    2013-01-01

    Full Text Available Amelanotic melanoma (AM presents a diagnostic challenge due to its wide clinical presentations, lack of pigmentation, and varied histological appearances. Immunohistochemistry plays a crucial role in the diagnosis of these lesions. Amelanotic melanoma of oral mucosa is an uncommon lesion. We report a case of a 50-year-old male patient with a growth on the anterior mandibular gingiva of seven-month duration. In the present case, histologically, the tumour resembled a granular cell lesion, which has not been reported previously in AM. Diagnosis was possible by a sequential panel of immunohistochemical markers, of which finally vimentin, S100, HMB45, and Melan-A were positive. The tumor was surgically excised, and postsurgical radiotherapy was given.

  3. Optic Nerve Sheath Meningioma Masquerading as Optic Neuritis

    Directory of Open Access Journals (Sweden)

    R. Alroughani

    2016-01-01

    Full Text Available Optic neuritis is a common presentation of demyelinating disorders such as multiple sclerosis. It typically presents with acute painful monocular vision loss, whereas chronic optic neuropathy can be caused by compressive lesions along the anterior visual pathway, genetic, toxic, or nutritional causes. We report an unusual presentation mimicking optic neuritis, which was subsequently diagnosed as optic nerve sheath meningioma (ONSM. Misinterpretation of white matter lesions on MRI of brain and the failure to image the optic nerves at the time of acute loss of vision led to the misdiagnosis of optic neuritis in this case. A comprehensive accurate history and ordering the appropriate imaging modality remain paramount in diagnosing progressive visual deterioration.

  4. Primary rib tumours in children (report of 27 cases with short literature review)

    International Nuclear Information System (INIS)

    27 cases of primary malignant and benign rib tumours are reported. The most common malignant rib tumour in childhood is Ewing sarcoma (20 cases). Some other rare bone tumours and tumorous conditions (reticulosarcoma, aneurysmal bone cyst, monostotic rib eosinophilic granuloma, osteoid osteoma and lymphangioma) are also described. In the authors' opinion Ewing sarcoma presents with characteristic clinico-radiographic findings in most of the cases. Other monostotic, primary rib tumours and tumorous conditions in childhood - with the exception of exchondroma and enchondroma - rarely show diagnostic radiographic features. 26 refs., 21 figs., 3 tabs

  5. Radiological, computertomographic, pathoanatomical and histological examination of the rib cartilage of the dog

    International Nuclear Information System (INIS)

    This study was concerned with the representation and description of the rib cartilage of the dog and the abnormalities of such by means of radiological, computer tomographic, pathoanatomical and histological examinations and the comparison of the results of the various examination methods. The study material consisted of 100 ventral thorax walls of dogs of different ages and breeds. In 39 of the subjects, no abnormalities of rib cartilage other than unremarkable calcification were observed. Among the subjects, there were 11 puppies (0-3 months), whose rib cartilage appeared soft tissue dense due to the absence of calcification, 14 juvenile animals (4-18 months), the rib cartilage of which showed a typical finely granulated structure, and 14 adult dogs (over 18 months), whose rib cartilage exhibited a homogeneous to net-like calcified appearance. In the calcified rib cartilage, the histological section showed a centrally located spongiosa rod surrounded by a hyaline cartilage shell. The calcification tendency of the first pair of rib cartilage was remarkable: in 70 dogs, the first pair of rib cartilage remained uncalcified despite calcification of the other rib cartilage. Sixty-one dogs exhibited rib cartilage abnormalities. According to the radiological appearance of the abnormalities, they were divided into groups and their incidence was calculated. Abnormalities seen included interruption in the continuity of the calcified rib cartilage with and without callus formation, enlargement of rib cartilage, cuff formation, and abnormalities on the Articulationes sternocostales (projections in or around articulations, calcified and fractured joint surfaces). In addition, remarkable calcification patterns were observed. By means of CT examination the densities of the tissue forming the various abnormalities was determined. In the course of the pathoanatomical examination, it was shown that the interruptions in continuity with callus and the various enlarged areas of the

  6. Rib fractures after chest physiotherapy for bronchiolitis or pneumonia in infants

    Energy Technology Data Exchange (ETDEWEB)

    Chalumeau, Martin [Service de Pneumologie et d' Allergologie Pediatriques, Hopital Necker-Enfants Malades, Paris (France); Service de Pediatrie, Hopital Saint-Vincent-de-Paul, Paris (France); Foix-l' Helias, Laurence; Scheinmann, Pierre; Zuani, Pierre [Service de Pneumologie et d' Allergologie Pediatriques, Hopital Necker-Enfants Malades, Paris (France); Gendrel, Dominique [Service de Pediatrie, Hopital Saint-Vincent-de-Paul, Paris (France); Ducou-le-Pointe, Hubert [Service de Radiologie, Hopital d' Enfants Armand-Trousseau, Avenue du Docteur Arnold Netter, 75571 Paris Cedex 12 (France)

    2002-09-01

    Heading AbstractBackground. The reported causes of rib fractures in infants are: child abuse, accidental injury, cardiopulmonary resuscitation, bone fragility, birth trauma and severe cough.Objective. To report chest physiotherapy (CPT) as a new cause of rib fractures in five infants.Materials and methods. We retrospectively identified all infants with rib fractures after CPT for bronchiolitis or pneumonia over a 4-year period in two paediatric and one paediatric radiology units in three university hospitals in Paris.Results. Five boys were identified. Their median age was 3 months. None had any other potential cause of rib fractures. The indication for CPT was bronchiolitis in four cases and pneumonia in one. The median number of rib fractures was four (range 1-5). Fractures were located between the 3rd and 8th ribs; they were lateral in four patients and posterior in one; they were unilateral in four patients and bilateral in one. Evolution was favourable in all cases. The prevalence of rib fractures after CPT during the study period was estimated at 1 in 1,000 infants hospitalised for bronchiolitis or pneumonia.Conclusions. CPT should be considered a potential, but very rare cause of rib fractures in infants. It can be of clinical relevance when rib fractures are the only feature suggestive of child abuse. (orig.)

  7. Rib fractures after chest physiotherapy for bronchiolitis or pneumonia in infants

    International Nuclear Information System (INIS)

    Heading AbstractBackground. The reported causes of rib fractures in infants are: child abuse, accidental injury, cardiopulmonary resuscitation, bone fragility, birth trauma and severe cough.Objective. To report chest physiotherapy (CPT) as a new cause of rib fractures in five infants.Materials and methods. We retrospectively identified all infants with rib fractures after CPT for bronchiolitis or pneumonia over a 4-year period in two paediatric and one paediatric radiology units in three university hospitals in Paris.Results. Five boys were identified. Their median age was 3 months. None had any other potential cause of rib fractures. The indication for CPT was bronchiolitis in four cases and pneumonia in one. The median number of rib fractures was four (range 1-5). Fractures were located between the 3rd and 8th ribs; they were lateral in four patients and posterior in one; they were unilateral in four patients and bilateral in one. Evolution was favourable in all cases. The prevalence of rib fractures after CPT during the study period was estimated at 1 in 1,000 infants hospitalised for bronchiolitis or pneumonia.Conclusions. CPT should be considered a potential, but very rare cause of rib fractures in infants. It can be of clinical relevance when rib fractures are the only feature suggestive of child abuse. (orig.)

  8. The forced sound transmission of finite ribbed plates, investigating the influence of point connections and periodicity

    DEFF Research Database (Denmark)

    Brunskog, Jonas

    2015-01-01

    Many engineering structures consist of plates being stiffened by ribs. The ribs can be connected to the plate in a line connection (welded or glued) or in point connections (screwed). It is well known that the rib stiffeners can significantly change the vibration field and the radiation behavior of...... the structure. These types of structures have thus often been studied in the past. However, there is still a lack of simplified expressions for the sound transmission of these structures. Therefore, simplified expressions for the forced airborne sound transmission of finite size single leaf ribbed...

  9. Two cases of uveitis masquerade syndrome caused by bilateral intraocular large B-cell lymphoma

    Directory of Open Access Journals (Sweden)

    Jovanović Svetlana

    2013-01-01

    Full Text Available Introduction. Sometimes it is not easy to clinically recognize subtle differences between intraocular lymphoma and noninfectious uveitis. The most common lymphoma subtype involving the eye is B-cell lymphoma. Case report. We presented two patients aged 59 and 58 years with infiltration of the subretinal space with a large B-cell non-Hodgkin intraocular lymphoma. The patients originally had clinically masked syndrome in the form of intermediate uveitis. As it was a corticosteroid-resistant uveitis, we focused on the possible diagnosis of neoplastic causes of this syndrome. During hospitalization, the neurological symptoms emerged and multiple subretinal changes accompanied by yellowish white patches of retinal pigment epithelium with signs of vitritis, which made us suspect the intraocular lymphoma. Endocranial magnetic resonance imaging established tumorous infiltration in the region of the left hemisphere of the cerebellum. The histopathological finding confirmed the diagnosis of large B-cell non-Hodgkin lymphoma of risk moderate degree, immunoblast - centroblast cytological type. The other patient had clinical chronic uveitis accompanied by yellowish shaped white echographic changes of the retina and localized changes in the level of the subretina. The diagnosis of lymphoma was made by brain biopsy. Conclusion. Uveitis masquerade syndrome should be considered in all patients over 40 years with idiopathic steroid-resistant uveitis. Treatment begun on time can affect the course and improve the prognosis of uveitis masquerade syndrome (UMS and systemic disease.

  10. Lessons to be learned: a case study approach--acute appendicitis masquerading as macroamylasaemia.

    Science.gov (United States)

    Ganesh, Muniappan; Salam, Imroz

    2008-05-01

    Macroamylasaemia is a condition in which serum amylase is elevated in the presence of a low to normal urinary amylase and normal renal function. It is rare but can masquerade as other clinical disorders. Discussed here is a case report of a patient who presented initially with abdominal pain (later recognized as being due to gangrenous appendicitis) and in whom there was a very high serum amylase level, leading to an erroneous initial diagnosis and management as acute pancreatitis. The CT scan of the abdomen was normal without any evidence of pancreatitis. Subsequently, the renal amylase:creatinine clearance ratio (C(am)/C(cr)) was found to be low, being characteristic and diagnostic of macroamylasaemia; the latter was, in turn, the cause for the elevated serum amylase level. The underlying macroamylasaemia had thus masqueraded as pancreatitis. The patient underwent appendicectomy and hence made an excellent recovery. It is vitally important to recognize this condition in order to avoid both an incorrect diagnosis and inappropriate treatment/management. PMID:18595630

  11. Anterior vaginal wall repair

    Science.gov (United States)

    ... symptoms will go away. This improvement will often last for years. Alternative Names A/P repair; Vaginal wall repair; Anterior and/ ... writing by ADAM Health Solutions. About MedlinePlus Site Map FAQs Contact ... Institutes of Health Page last updated: 23 August 2016

  12. [Toxic anterior segment syndrome].

    Science.gov (United States)

    Cornut, P-L; Chiquet, C

    2011-01-01

    Toxic anterior segment syndrome (TASS) is a general term used to describe acute, sterile postoperative inflammation due to a non-infectious substance that accidentally enters the anterior segment at the time of surgery and mimics infectious endophthalmitis. TASS most commonly occurs acutely following anterior segment surgery, typically 12-72h after cataract extraction. Anterior segment inflammation is usually quite severe with hypopyon. Endothelial cell damage is common, resulting in diffuse corneal edema. No bacterium is isolated from ocular samples. The causes of TASS are numerous and difficult to isolate. Any device or substance used during the surgery or in the immediate postoperative period may be implicated. The major known causes include: preservatives in ophthalmic solutions, denatured ophthalmic viscosurgical devices, bacterial endotoxin, and intraocular lens-induced inflammation. Clinical features of infectious and non-infectious inflammation are initially indistinguishable and TASS is usually diagnosed and treated as acute endophthalmitis. It usually improves with local steroid treatment but may result in chronic elevation of intraocular pressure or irreversible corneal edema due to permanent damage of trabecular meshwork or endothelial cells. PMID:21176994

  13. In-target yields for RIB production with EURISOL

    International Nuclear Information System (INIS)

    EURISOL DS (European Isotope Separation On-Line - Design Study) project is the European common effort in planning a next generation RIB factory able to deliver secondary beams up to 1013 pps at energies up to 150 MeV u-1. The proposed schematic layout of the facility is based on four target stations, three direct targets of 100kW of beam power and one multi-MW (MMW) target two stages assembly. Being produced via spallation the RIBs produced in the direct targets are mainly proton rich. While in the multi-MW target high intensity RIBs of neutron rich isotopes are produced by fission in actinide targets placed in the fast neutron spectrum given by a liquid metal spallation source. The purpose of this paper is to summarize a work carried out within Task 11 'Beam Intensity Calculations': estimation of the in-target yield intensities produced in the various target configurations. Benchmark studies were performed initially in order to verify the accurate description of the spallation models used by the MCNPX2.5.0 code and to choose the best options to be used for the present work requirements. Numerous calculations using MCNPX2.5.0 combined with the evolution code CINDER'90 were carried out to assess the performance of the direct targets. The production rates in the case of the MMW-fission targets were obtained with a given and fixed geometry (optimized to reach 1015 fission s-1). Only fissile material, moderator and reflector were free. (author)

  14. Single-transverse-mode Ti:sapphire rib waveguide laser

    OpenAIRE

    Grivas, C.; Shepherd, D. P.; May-Smith, T.C.; Eason, R. W.; Pollnau, M

    2005-01-01

    Laser operation of Ti:sapphire rib waveguides fabricated using photolithography and ion beam etching in pulsed laser deposited layers is reported. Polarized laser emission was observed at 792.5 nm with an absorbed pump power threshold of 265 mW, which is more than a factor of 2 lower in comparison to their planar counterparts. Measured beam propagation factors $M^{2}_{x}$ and $M^{2}_{y}$ of 1.3 and 1.2, respectively, indicated single-transverse-mode emission. A quasi-cw output power of 27 mW ...

  15. Cold plate with combined inclined impingement and ribbed channels

    Science.gov (United States)

    Parida, Pritish R.

    2015-12-22

    Heat transfer devices and methods for making the same that include a first enclosure having at least one inlet port; a second enclosure having a bottom plate and one or more dividing walls to establish channels, at least one internal surface of each channel having rib structures to create turbulence in a fluid flow; and a jet plate connecting the first enclosure and the second enclosure having impinging jets that convey fluid from the first enclosure to the channels, said impinging jets being set at an angular deviation from normal to cause local acceleration of fluid and to increase a local heat transfer rate.

  16. Supercontinuum generation in dispersion-managed tapered-rib waveguide.

    Science.gov (United States)

    Hu, Hongyu; Li, Wenbo; Dutta, Niloy K

    2013-10-20

    We have designed a tapered-rib waveguide and numerically studied the generation of supercontinuum using such waveguides. The Air-SF57 glass-SiO(2) waveguide is 3 cm long, with a varying etched depth to manage the total dispersion. Numerical simulations are conducted for input pulses at a wavelength of 1.55 μm with a width of 150 fs and peak power of 5 kW. The proposed waveguide geometry greatly broadens the output spectrum, extending from ∼1 to ∼6  μm, caused by the continuous modification of the phase-matching condition for the generated waves. PMID:24216588

  17. Anterior cruciate ligament (ACL) injury

    Science.gov (United States)

    Cruciate ligament injury - anterior; ACL injury; Knee injury - anterior cruciate ligament (ACL) ... confirm the diagnosis. It may also show other knee injuries. First aid for an ACL injury may include: ...

  18. Rib osteoblastic osteosarcoma in an African hedgehog (Atelerix albiventris).

    Science.gov (United States)

    Benoit-Biancamano, Marie-Odile; D'Anjou, Marc-André; Girard, Christiane; Langlois, Isabelle

    2006-07-01

    A 3-year-old African hedgehog (Atelerix albiventris) was presented to the Exotic Animal Clinic of the University of Montreal for evaluation of a mass growing on the right thoracic wall. The diagnostic workup, which included helical computed tomography, confirmed the presence of a large mass, originating from the right 7th rib, infiltrating the thoracic wall and cavity. The animal was euthanized due to the poor prognosis. At necropsy, a well-demarcated mass penetrated the thoracic wall and incorporated the 6th to 8th ribs. Cut sections of the tumor were white, glistening, firm, and gritty. Microscopically, it was composed of polyhedral to elongated cells with interspersed trabeculae of osteoid and large areas of coagulative necrosis. On the basis of histopathologic findings, a diagnosis of osteoblastic osteosarcoma was made. To the authors' knowledge, this is the first report of an osteoblastic osteosarcoma on the thoracic wall of an African hedgehog, as well as the first report of the use of helical computed tomography in that species. PMID:16921888

  19. The RIB production target for the SPES project

    Energy Technology Data Exchange (ETDEWEB)

    Monetti, Alberto [viale dell' Universita 2, Laboratori Nazionali di Legnaro, Legnaro (Italy); University of Padua, Department of Industrial Engineering (DII), Padova (Italy); Andrighetto, Alberto; Manzolaro, Mattia; Corradetti, Stefano; Scarpa, Daniele; Rossetto, Francesco; Vasquez, Jesus; Rossignoli, Massimo; Calderolla, Michele; Silingardi, Roberto; Mozzi, Aldo; Vivian, Gianluca; Boratto, Enrico; Ballan, Michele; Prete, Gianfranco [viale dell' Universita 2, Laboratori Nazionali di Legnaro, Legnaro (Italy); Petrovich, Carlo [ENEA, Bologna (Italy); Martinez Dominguez, Fernando [viale dell' Universita 2, Laboratori Nazionali di Legnaro, Legnaro (Italy); ESS Bilbao, Instituto de Fusion Nuclear, Madrid (Spain); Borgna, Francesca [viale dell' Universita 2, Laboratori Nazionali di Legnaro, Legnaro (Italy); University of Padua, Department of Pharmaceutical and Pharmacological Sciences, Padova (Italy); Meneghetti, Giovanni [University of Padua, Department of Industrial Engineering (DII), Padova (Italy)

    2015-10-15

    Facilities making use of the Isotope Separator On-Line (ISOL) method for the production of Radioactive Ion Beams (RIB) attract interest because they can be used for nuclear structure and reaction studies, astrophysics research and interdisciplinary applications. The ISOL technique is based on the fast release of the nuclear reaction products from the chosen target material together with their ionization into short-lived nuclei beams. Within this context, the SPES (Selective Production of Exotic Species) facility is now under construction in Italy at INFN-LNL (Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro). The SPES facility will produce RIBs mainly from n-rich isotopes obtained by a 40 MeV cyclotron proton beam (200 μA) directly impinging on a uranium carbide multi-foil fission target. The aim of this work is to describe and update, from a comprehensive point of view, the most important results obtained by the analysis of the on-line behavior of the SPES production target assembly. In particular an improved target configuration has been studied by comparing different codes and physics models: the thermal analyses and the isotope production are re-evaluated. Then some consequent radioprotection aspects, which are essential for the installation and operation of the facility, are presented. (orig.)

  20. The RIB production target for the SPES project

    International Nuclear Information System (INIS)

    Facilities making use of the Isotope Separator On-Line (ISOL) method for the production of Radioactive Ion Beams (RIB) attract interest because they can be used for nuclear structure and reaction studies, astrophysics research and interdisciplinary applications. The ISOL technique is based on the fast release of the nuclear reaction products from the chosen target material together with their ionization into short-lived nuclei beams. Within this context, the SPES (Selective Production of Exotic Species) facility is now under construction in Italy at INFN-LNL (Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro). The SPES facility will produce RIBs mainly from n-rich isotopes obtained by a 40 MeV cyclotron proton beam (200 μA) directly impinging on a uranium carbide multi-foil fission target. The aim of this work is to describe and update, from a comprehensive point of view, the most important results obtained by the analysis of the on-line behavior of the SPES production target assembly. In particular an improved target configuration has been studied by comparing different codes and physics models: the thermal analyses and the isotope production are re-evaluated. Then some consequent radioprotection aspects, which are essential for the installation and operation of the facility, are presented. (orig.)

  1. The RIB production target for the SPES project

    Science.gov (United States)

    Monetti, Alberto; Andrighetto, Alberto; Petrovich, Carlo; Manzolaro, Mattia; Corradetti, Stefano; Scarpa, Daniele; Rossetto, Francesco; Martinez Dominguez, Fernando; Vasquez, Jesus; Rossignoli, Massimo; Calderolla, Michele; Silingardi, Roberto; Mozzi, Aldo; Borgna, Francesca; Vivian, Gianluca; Boratto, Enrico; Ballan, Michele; Prete, Gianfranco; Meneghetti, Giovanni

    2015-10-01

    Facilities making use of the Isotope Separator On-Line (ISOL) method for the production of Radioactive Ion Beams (RIB) attract interest because they can be used for nuclear structure and reaction studies, astrophysics research and interdisciplinary applications. The ISOL technique is based on the fast release of the nuclear reaction products from the chosen target material together with their ionization into short-lived nuclei beams. Within this context, the SPES (Selective Production of Exotic Species) facility is now under construction in Italy at INFN-LNL (Istituto Nazionale di Fisica Nucleare — Laboratori Nazionali di Legnaro). The SPES facility will produce RIBs mainly from n-rich isotopes obtained by a 40 MeV cyclotron proton beam (200 μA) directly impinging on a uranium carbide multi-foil fission target. The aim of this work is to describe and update, from a comprehensive point of view, the most important results obtained by the analysis of the on-line behavior of the SPES production target assembly. In particular an improved target configuration has been studied by comparing different codes and physics models: the thermal analyses and the isotope production are re-evaluated. Then some consequent radioprotection aspects, which are essential for the installation and operation of the facility, are presented.

  2. Experimental and Numerical Study on Heat Transfer Enhancement of a Rectangular Channel with Discontinuous Crossed Ribs and Grooves

    Institute of Scientific and Technical Information of China (English)

    唐新宜; 朱冬生

    2012-01-01

    Experimental and numerical investigations have been conducted to study turbulent flow of water and heat transfer characteristics in a rectangular channel with discontinuous crossed ribs and grooves.The tests investigated the overall heat transfer performance and friction factor in ribbed and ribbed-grooved channels with rib angle of 30°.The experimental results show that the overall thermo-hydraulic performance for ribbed-grooved channel is increased by 10%-13.6% when compared to ribbed channel.The investigation on the effects of different rib angles and rib pitches on heat transfer characteristics and friction factor in ribbed-grooved channel was carried out using Fluent with SST(shear-stress transport) k-ω turbulence model.The numerical results indicate that the case for rib angle of 45° shows the best overall thermo-hydraulic performance,about 18%-36% higher than the case for rib angle of 0°.In addition,the flow patterns and local heat transfer characteristics for ribbed and ribbed-grooved channels based on the numerical simulation were also analyzed to reveal the mechanism of heat transfer enhancement.

  3. Anterior Cruciate Ligament Injury

    OpenAIRE

    Vilaseca, Tomas; Chahla, Jorge; Rodriguez, Gustavo Gomez; Arroquy, Damián; Herrera, Gonzalo Perez; Orlowski, Belen; Carboni, Martín

    2015-01-01

    Objectives: The objective of this study was to analyze whether it is more frequent the presence of a decreased range of motion in the hips of recreational athletes with primary injury of the anterior cruciate ligament (ACL) than in a control group of volunteers without knee pathology. Methods: We included prospectively recreational athletes between 18 and 40 years with an acute ACL injury between January 2011 and January 2013. They were compared with a control group of volunteers recreational...

  4. Cryptococcal rib osteomyelitis as primary and only symptom of idiopathic CD4 penia

    DEFF Research Database (Denmark)

    Legarth, Rebecca A; Christensen, Merete; Calum, Henrik;

    2014-01-01

    A 59-year old man with idiopathic CD4 lymphopenia presented with extensive disseminated Cryptococcus neoformans infection including a large rib cryptoccocoma, vertebral spondylitis and pleural empyema. Complete resection of the affected part of the rib was necessary after failure of initial antif...

  5. Abnormalities of fetal rib number and associated fetal anomalies using three dimensional ultrasonography

    Directory of Open Access Journals (Sweden)

    Sameh Ahmad Khodair

    2014-09-01

    Conclusion: Abnormal number of fetal ribs more to be an isolated finding (4.3% but it may also be seen with other anomalies (3.7% in this study. 3DUS is useful for scanning the fetal ribs in the mid trimester of the pregnancy for early detection of associated genetic aberrations.

  6. Alterations of diaphragm and rib cage morphometry in severe COPD patients by CT analysis.

    Science.gov (United States)

    Salito, C; Luoni, E; Aliverti, A

    2015-08-01

    Although it is known that in patients with COPD acute hyperinflation determines shortening of the inspiratory muscles, its effects on both diaphragm and rib cage morphology are still to be investigated. In this preliminary study the relationships between hyperinflation, emphysema, diaphragm and rib cage geometry were studied in 5 severe COPD patients and 5 healthy subjects. An automatic software was developed to obtain the 3-D reconstruction of diaphragm and rib cage from CT scans taken at total lung capacity (TLC) and residual volume (RV). Dome surface area (Ado), radius of curvature, length (Ld) and position (referred to xiphoid level) of the diaphragm and antero-posterior (A-P) and transverse (T) diameters of rib cage were calculated at both volumes. Ado and Ld were similar in COPD and controls when compared at similar absolute lung volumes. Radius of curvature was significantly higher in COPD than in controls only at TLC. In COPD, the range of diaphragm position was invariantly below the xiphoid level, while in controls the top of diaphragm dome was always above it. Rib cage diameters were not different at TLC. A-P diameter was greater in COPD than in controls at RV, while T diameters were similar. In conclusion, in severe COPD diaphragm and rib cage geometry is altered at RV. The lower position of diaphragm is associated to smaller A-P but not transversal rib cage diameters, such that rib cage adopts a more circular shape. PMID:26737755

  7. STRESS FRACTURE OF THE FIRST RIB IN A HIGH SCHOOL WEIGHT LIFTER

    Directory of Open Access Journals (Sweden)

    Hiroyuki Fujioka

    2009-06-01

    Full Text Available A 17-year-old boy, who played a weight lifting in high school, sustained stress fracture of the first rib without any causes. We successfully treated first rib stress fracture with limitation of using the upper extremity and with using low-intensity pulsed ultrasound

  8. Modification of the rib operon derived from Bacillus subtilis and its expression in Escherichia coli

    Institute of Scientific and Technical Information of China (English)

    Zhang Huitu; Meng Kun; Wang Yaru; Luo Huiying; Yuan Tiezheng; Yang Peilong; Bai Yingguo; Yao Bin; Fan Yunliu

    2007-01-01

    A riboflavin operon(rib operon)derived from Bacillus subtilis 368 was modified on structure and the resulting operons were expressed in various strains of Escherichia coli. The results showed that the optimization of the rib operon and the host strain used for expression are two main factors affecting the riboflavin production. Replacing the promoter l and rfn box of the rib operon with a strong constructive promoter spo l drastically increased the expression of the rib genes. When E. Coli JMl09 was used as the host strain, the highest riboflavin production reached 95.3μg/mL(about eight times higher than that 0f the unmodified rib operon). In addition, when tetracycline(20 μg/mL)was used as the selective pressure, compared with the ampicillin resistant transformants, a higher riboflavin yield Was obtained in tetracycline resistant host strain.

  9. Characterization of Human Rib Biomechanical Responses due to Three-Point Bending.

    Science.gov (United States)

    Kalra, Anil; Saif, Tal; Shen, Ming; Jin, Xin; Zhu, Feng; Begeman, Paul; Yang, King H; Millis, Scott

    2015-11-01

    In the elderly population, rib fracture is one of the most common injuries sustained in motor vehicle crashes. The current study was conducted to predict the biomechanical fracture responses of ribs with respect to age, gender, height, weight and percentage of ash content. Three-point bending experiments were conducted on 278 isolated rib samples extracted from 82 cadaver specimens (53 males and 29 females between the ages of 21 and 87 years) for 6th and 7th levels of ribs. Statistical analyses were carried out to identify differences based on age and gender. It was found that, in comparison to males, females had significantly lower values for maximum bending moments, slopes of bending moment-angle curves, and average cortical-bone thickness (pcrash conditions. Hence, rib-material properties, which are dependent on strain rate, and are needed for wholebody finite element models representing different populations, still require more research. PMID:26660742

  10. Bone and 67Ga scintigraphy in the evaluation of rib lesions in patients with multiple myeloma

    International Nuclear Information System (INIS)

    Rib lesions in 14 patients with multiple myeloma were evaluated by 99mTc-phosphorous compound bone scintigraphy and 67Ga scintigraphy. In the present study, in order to accurately detect rib lesions in multiple myeloma. bone and 67Ga scintigraphy were performed in 14 patients with multiple myeloma. The patterns of radionuclide accumulation in rib lesions on bone scintigraphy were classified by their grade, type, and site, and the findings were compared with the results of 67Ga scintigraphy. Thus, in cases of multiple myeloma, it was important to consider carefully both the intensity and the design of bone scintigraphy in combination with follow-up study by 67Ga scintigraphy. As a result of such consideration, we found that bone and 67Ga scintigraphy were useful in distinguishing invasive lesions from benign degenerative changes in the rib cage in cases with suspected rib involvement of multiple myeloma. (author)

  11. Primary extra-renal clear cell renal cell carcinoma masquerading as an adrenal mass: A diagnostic challenge

    OpenAIRE

    Roumina Hasan; Sandeep Kumar; Vidya Monappa; Anurag Ayachit

    2015-01-01

    We present the first case of a nonmetastasizing renal cell carcinoma (RCC) masquerading as an adrenal mass, in the presence of normal bilateral native kidneys, in a young adult. The possibility of this mass developing in a supernumerary kidney was ruled out, since no identifiable renal tissue, pelvis or ureters was seen within the mass, nor was any separate systemic arterial supply to the mass seen. The diagnosis of extra-renal clear cell RCC was based on cyto-morphological features, further ...

  12. The Analysis of IP Masquerading Technology%IP伪装技术分析

    Institute of Scientific and Technical Information of China (English)

    王京智; 洪观甫

    2012-01-01

    本文介绍了当前网监管理工作中经常遇到的诈骗、色情、六合彩等违规网站经常使用的IP伪装技术,并结合实例讲解了此类网站的工作原理以及提出防范措施,为从事该项技术工作的工程师提供参考。%This paper introduces the IP masquerading technology, which are extensively encountered in current network monitoring, such as fraud, pornography and lottery ticket illegal websites. Connecting with the real example to explain the working principle of such websites, proposing precautionary measures, and providing a reference for the engineers who involved in the technical works.

  13. A Case of Hyperemesis Gravidarum due to Gastric Cancer Masquerading as Preeclampsia

    Directory of Open Access Journals (Sweden)

    Daniel R. Hersh

    2011-12-01

    Full Text Available Nausea and vomiting are symptoms frequently seen in normal pregnancy. We report a patient with gastric carcinoma who presented with severe hyperemesis gravidarum that led to extreme volume depletion, hypertension, proteinuria, and acute renal failure. A 35-year-old woman (para 2-1-0-1 with a prenatal course significant for persistent nausea, vomiting, and poor weight gain presented at 36 weeks' gestation with elevated blood pressure (157/114 mm Hg, proteinuria (4+, hypochloremic metabolic alkalosis, and severe intravascular volume contraction. A presumptive diagnosis of severe preeclampsia was made, the patient was given intravenous MgSO4, and cesarean delivery was accomplished uneventfully. When significant emesis persisted in the postoperative period, esophagogastroduodenoscopy revealed an antral/prepyloric mass with a biopsy-proven poorly differentiated adenocarcinoma. To our knowledge, this is the first report of a case of hyperemesis gravidarum with gastric cancer masquerading as preeclampsia.

  14. FNAC of Bacillus- Calmette- Guerin lymphadenitis masquerading as Langerhans cell histiocytosis.

    Directory of Open Access Journals (Sweden)

    Gupta Nalini

    2004-12-01

    Full Text Available Abstract Bacillus Calmette Guerin (BCG lymphadenitis is a well known entity. Disseminated BCG infection usually presents as generalized lymphadenopathy, skin rash and hepatosplenomegaly and at times, can pose a diagnostic challenge to clinicians. There are only a few published studies on the cytological findings of BCG lymphadenitis. In this letter we report the fine needle aspiration cytology (FNAC of BCG lymphadenitis clinically masquerading as Langerhans cell histiocytosis (LCH. FNA smears showed sheets of foamy macrophages and many polymorphs in a dirty necrotic background with many macrophages as well as polymorphs showing negatively stained rod like structures within their cytoplasm. Zeihl Neelson stain revealed that these cells were heavily loaded with acid fast bacilli (AFB. In the index case, AFB were also seen within the cytoplasm of polymorphs, which has not been documented earlier in the literature.

  15. Granulocytic sarcoma masquerading as Ewing′s sarcoma: A diagnostic dilemma

    Directory of Open Access Journals (Sweden)

    Haresh Kunhi

    2008-01-01

    Full Text Available An eleven-year-old boy presented with a swelling in his left elbow. Radiologically the features were that of an Ewing′s sarcoma involving the ulna. Histopathology showed small round cell tumor strongly positive for Monoclonal Imperial Cancer research fund 2 (MIC2 antigen. Similar cells in the bone marrow were involved with MIC2 positivity. The patient developed skin lesions, which on biopsy were found to be chloromas. The initial biopsies were reevaluated with special stains revealing granulocytic sarcomas in acute myeloid leukemia masquerading as Ewing′s due to its MIC2 positivity. The possibility of myeloid neoplasms should be considered routinely with known MIC2 positive round cell tumors.

  16. Reentrant Supraventricular Tachycardia in a Pediatric Trauma Patient Masquerading as a Cardiac Contusion

    Directory of Open Access Journals (Sweden)

    Bradbum, Christopher

    2005-01-01

    Full Text Available Establishing the etiology of tachycardia in a trauma patient is often difficult. Pediatric trauma patients present an even tougher challenge. Cardiac contusion should be suspected when other more common traumatic injuries that produce hypoxia and blood loss are excluded. The diagnosis of cardiac contusion is notoriously difficult to make largely due to the controversy over the definition of the disease, and the lack of a true gold standard confirmatory test. Atrioventricular nodal reentrant tachycardia (AVNRT is a common form of supraventricular tachycardia (SVT that can also present a diagnostic challenge to emergency physicians. While electrophysiologic studies are the gold standard for confirming the diagnosis, there are certain aspects of the history, electrocardiogram (ECG, and responses to cardiac maneuvers that strongly suggest the diagnosis. We present the case of a pediatric trauma patient that presented with new onset AVNRT masquerading as cardiac contusion.

  17. Fashion pictures and women pictures in French women magazine. Normatives parades or strategic masquerade?

    Directory of Open Access Journals (Sweden)

    Justine MARILLONNET

    2014-12-01

    Full Text Available This article proposes to study the fashion pictures within a representative sample of French women magazines. Based on the method of “sémiologie des indices”, used to analyze a corpus of woman’s body and fashion staged, this paper addresses the issue of new functions granted to the stereotyping process. Starting to the assumption of a contract between audience and media, this analysis shows that the gender stereotype may be prescribed, up to a caricature of the womanhood, to the female readers identified as co-producers of the media discourse. Demonstrating both the co-existence of a plurality of gender representations in its pictures and their variability, this work proposes the concept of strategic masquerade to apprehend the possible new functions for the process of gender stereotyping in media.

  18. Brugada syndrome masquerading as acute myocardial infarction in a patient presenting with ventricular fibrillation

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    @@ Idiopathic ventricular fibrillation (VF) has been reported to account for 3%-9% of all sudden arrhythmic deaths.1 In 1991, Pedro and Josep Brugada first described a subgroup of patients with idiopathic VF who presented with a right bundle branch block (RBBB) pattern and marked ST-segment elevation in the right precordial leads V1-V3 during sinus rhythm in the absence of any structural heart disease.2 This is now known as the Brugada syndrome. In Hong Kong the first two cases of Brugada syndrome were reported in April 1999 in local medical literature. Since then more patients from different local hospitals were identified to suffer from the syndrome. We report here a male patient suffering from Brugada syndrome which masqueraded as an acute anteroseptal myocardial infarction 10 years ago.

  19. Geomechanical design of a room and rib pillar granite mine

    Institute of Scientific and Technical Information of China (English)

    Daniele Peila; Claudia Guardini; Sebastiano Pelizza

    2008-01-01

    The geomochanical and stability design of an underground granite mine located in Canal San Bovo (Trento district, North- eastern Italy) was described. The exploitation of the granite, which is used in the ceramic industry, was carried out by the rooms and rib pillars method. The rooms are 12 m wide while the pillars are 11 m wide and they cross the main discontinuity set of the rock mass in the perpendicular direction. To verify the stability condition of an underground mine, it is necessary to carry out the calcula- tions that are able to check both the local and global stability of the rock mass. In the studied example, this approach has been applied with the development of analytical and numerical parametric analyses and it has permitted to get the best orientation and to design the size of rooms and pillars.

  20. Structure optimization of polymeric Mach-Zehnder rib waveguide

    Institute of Scientific and Technical Information of China (English)

    LU Rong-guo; LiU Yong-zhi; LIAO Jin-kun; LIAO Yi-tao; HAN Wen-jie

    2007-01-01

    A systematic analysis of the polymeric Mach-Zehnder rib waveguide is presented based on the calculation and optimization. The simulation is carried out with the Effective Index Method (EIM) and two-dimensional (2-D)Finite Difference Beam Propagation Method (FD-BPM). The large refractive index step between the consecutive polymer layers is reduced by using EIM and thus the precision of the calculation is ensured. The important parameters of the waveguide such as Y-junction angle and the separation gap are discussed and their relationships with the optical power propagation and the loss characteristics are investigated in this paper. The total loss of the optimized structure is 0.258 dB.

  1. Interactive Simulation of Diaphragm Motion Through Muscle and Rib Kinematics

    Science.gov (United States)

    Villard, Pierre-Frédéric; Bourne, Wesley; Bello, Fernando

    Modeling of diaphragm behaviour is of relevance to a number of clinical procedures such as lung cancer radiotherapy and liver access interventions. The heterogeneity in tissue composition of the diaphragm, as well as the various physiological phenomena influencing its behaviour, requires a complex model in order to accurately capture its motion. In this chapter we present a novel methodology based on a heterogenous model composed of mass-spring and tensegrity elements. The physiological boundary conditions have been carefully taken into account and applied to our model. Thus, it incorporates the influence of the rib kinematics, the muscle natural contraction/relaxation and the motion of the sternum. Initial validation results show that the behaviour of the model closely follows that of a real diaphragm.

  2. Structural efficiency study of composite wing rib structures

    Science.gov (United States)

    Swanson, Gary D.; Gurdal, Zafer; Starnes, James H., Jr.

    1988-01-01

    A series of short stiffened panel designs which may be applied to a preliminary design assessment of an aircraft wing rib is presented. The computer program PASCO is used as the primary design and analysis tool to assess the structural efficiency and geometry of a tailored corrugated panel, a corrugated panel with a continuous laminate, a hat stiffened panel, a blade stiffened panel, and an unstiffened flat plate. To correct some of the shortcomings in the PASCO analysis when shear is present, a two step iterative process using the computer program VICON is used. The loadings considered include combinations of axial compression, shear, and lateral pressure. The loading ranges considered are broad enough such that the designs presented may be applied to other stiffened panel applications. An assessment is made of laminate variations, increased spacing, and nonoptimum geometric variations, including a beaded panel, on the design of the panels.

  3. Osteochondroma of the fifth rib resulting in recurrent hemothorax

    Energy Technology Data Exchange (ETDEWEB)

    Patel, Mital [Cleveland Clinic Foundation, Department of Radiology - Musculoskeletal Imaging Fellowship, Cleveland, OH (United States); Bauer, Thomas W. [The Cleveland Clinic L-25, Departments of Pathology and Orthopaedic Surgery, Cleveland, OH (United States); Santoscoy, Thomas [Cleveland Clinic Foundation, Department of Thoracic and Cardiovascular Surgery, Mayfield Heights, OH (United States); Ilaslan, Hakan [Cleveland Clinic Foundation, Department of Radiology, Musculoskeletal Section, Cleveland, OH (United States)

    2015-12-15

    A 48-year-old man presented with recurrent spontaneous hemothoraces, which ultimately were found to be secondary to a pedunculated costal osteochondroma causing vascular injury. After initially undergoing endovascular coil embolization, he ultimately required segmental rib resection containing the offending lesion for definite treatment. Although a few cases of symptomatic costal osteochondromas have been reported in the literature, as far as we know, no previous reports have provided direct radiologic confirmation of active bleeding or the role of angiographic intervention. In this report, we highlight the importance of CT angiography in establishing a direct link between an osteochondroma and recurrent hemothorax. We also discuss the diagnostic imaging challenges associated with this condition and the use of a multidisciplinary treatment strategy involving both angiographic and operative management. (orig.)

  4. Anterior knee pain

    International Nuclear Information System (INIS)

    Anterior knee pain is a common complain in all ages athletes. It may be caused by a large variety of injuries. There is a continuum of diagnoses and most of the disorders are closely related. Repeated minor trauma and overuse play an important role for the development of lesions in Hoffa's pad, extensor mechanism, lateral and medial restrain structures or cartilage surface, however usually an increase or change of activity is referred. Although the direct relation of cartilage lesions, especially chondral, and pain is a subject of debate these lesions may be responsible of early osteoarthrosis and can determine athlete's prognosis. The anatomy and biomechanics of patellofemoral joint is complex and symptoms are often unspecific. Transient patellar dislocation has MR distinct features that provide evidence of prior dislocation and rules our complication. However, anterior knee pain more often is related to overuse and repeated minor trauma. Patella and quadriceps tendon have been also implicated in anterior knee pain, as well as lateral or medial restraint structures and Hoffa's pad. US and MR are excellent tools for the diagnosis of superficial tendons, the advantage of MR is that permits to rule out other sources of intraarticular derangements. Due to the complex anatomy and biomechanic of patellofemoral joint maltracking is not fully understood; plain films and CT allow the study of malalignment, new CT and MR kinematic studies have promising results but further studies are needed. Our purpose here is to describe how imaging techniques can be helpful in precisely defining the origin of the patient's complaint and thus improve understanding and management of these injuries

  5. Womanliness as Masquerade: Tracing Luce Irigaray’s Theory in Angela Carter’s Nights at the Circus

    Directory of Open Access Journals (Sweden)

    Yiğit Sümbül

    2015-12-01

    Full Text Available Published in 1977 with a great deal of controversy within European feminist circles, Luce Irigaray’s This Sex which Is Not One presents the author’s commentary on the modern phallocentric culture, commodification of women and their counteraction disguised within the very patriarchal structures. Irigaray, for instance, views womanliness and female submissiveness as a strategy that women have always made use of in order to develop a much more unfettered self behind such masks. Women masquerade as objects to be consumed to achieve a freer voice from the patriarchal discourse and to establish themselves as the ultimate subjects of a never-ending cultural exchange. Irigaray’s views on female strategies such as masquerade and performativity are applicable to a feminist reading of Angela Carter’s famous postmodern novel, Nights at the Circus (1984, which critiques the patriarchal ideology with its suggestion of a New Woman. Fevvers, the protagonist of the novel, imprisons the male voice in the novel behind the invisible cage of her own world of performances and uses her womanliness to suppress the male willpower to the degree of self-submission. In this respect, this study argues that Carter’s generation of Fevvers as the New Woman is reminiscent of what Irigaray theorizes in her above article with respect to questions like womanliness, masquerade and performativity

  6. The anterior cingulate cortex

    Directory of Open Access Journals (Sweden)

    Pavlović D.M.

    2009-01-01

    Full Text Available The anterior cingulate cortex (ACC has a role in attention, analysis of sensory information, error recognition, problem solving, detection of novelty, behavior, emotions, social relations, cognitive control, and regulation of visceral functions. This area is active whenever the individual feels some emotions, solves a problem, or analyzes the pros and cons of an action (if it is a right decision. Analogous areas are also found in higher mammals, especially whales, and they contain spindle neurons that enable complex social interactions. Disturbance of ACC activity is found in dementias, schizophrenia, depression, the obsessive-compulsive syndrome, and other neuropsychiatric diseases.

  7. Fundamentally excited flow past a surface-mounted rib. Part I: Turbulent structure characterisation

    Indian Academy of Sciences (India)

    P K Panigrahi

    2001-10-01

    Different data analysis techniques for characterisation of the turbulent flow past a surface-mounted rib are reviewed. Deficiencies of the existing techniques are explained and modified techniques for determination of coherent structure magnitude and phase jitter are suggested. The effect of fundamental excitation on the flow is studied by using these turbulent signal analysis techniques. The appropriate length scale for characterizing the large-scale structures present in the reattaching shear layer of the surface-mounted rib is found to be the momentum thickness at the downstream edge of the rib, and the corresponding Strouhal number is 0.013. This is in contrast to a rib in the free stream, where the rib height is the correct scaling parameter. The post reattachment region is observed to be dominated by large-scale structures contrary to the traditional belief that large eddies break into small scales at the reattachment location. Low magnitude of phase jitter in the near field region is observed, indicating coherence of the flow structures. Phase decorrelation begins to occur beyond three rib heights from the downstream edge of the rib. From the quadrant analysis results, the outer edge of the shear layer is observed to be dominated by large-scale ejection motions.

  8. Physical mechanisms of active control of sound transmission through rib stiffened double-panel structure

    Science.gov (United States)

    Ma, Xiyue; Chen, Kean; Ding, Shaohu; Yu, Haoxin

    2016-06-01

    This paper presents an analytical investigation on physical mechanisms of actively controlling sound transmission through a rib stiffened double-panel structure using point source in the cavity. The combined modal expansion and vibro-acoustic coupling methods are applied to establish the theoretical model of such active structure. Under the condition of minimizing radiated power of the radiating ribbed plate, the physical mechanisms are interpreted in detail from the point of view of modal couplings similar as that used in existed literatures. Results obtained demonstrate that the rule of sound energy transmission and the physical mechanisms for the rib stiffened double-panel structure are all changed, and affected by the coupling effects of the rib when compared with the analytical results obtained for unribbed double-panel case. By taking the coupling effects of the rib into considerations, the cavity modal suppression and rearrangement mechanisms obtained in existed investigations are modified and supplemented for the ribbed plate case, which gives a clear interpretation for the physical nature involved in the active rib stiffened double-panel structure.

  9. Multidisciplinary management of anterior diastemata

    DEFF Research Database (Denmark)

    Furuse, Adilson Yoshio; Herkrath, Fernando José; Franco, Eduardo Jacomino;

    2007-01-01

    Anterior diastemata may compromise the harmony of a patient's smile. Consideration of etiologic factors, previous gingival conditioning, and individual treatment planning are essential in the proper management of anterior diastemata. An integrated orthodontic-restorative approach may enhance the...... aesthetic results when orthodontic therapy itself is not feasible. This article presents integrated orthodonticrestorative solutions of anterior diastemata, associated with the conditioning of the gingival tissue with composite resin, and discusses the most relevant aspects related to their etiology and...

  10. Modal density and modal distribution of bending wave vibration fields in ribbed plates

    DEFF Research Database (Denmark)

    Dickow, Kristoffer Ahrens; Brunskog, Jonas; Ohlrich, Mogens

    2013-01-01

    energy analysis. One reason is that the modal density is not uniformly distributed due to the spatial periodicity introduced by the ribs. This phenomenon is investigated in the present paper, using a modal model of a ribbed plate. The modal model uses the Fourier sine modes, and the coupling between the...... plate and ribs is incorporated using Hamilton's principle. This model is then used to investigate the modal density of the considered spatially periodic structure, and a grouping of the modes in different dominating directions is proposed. Suggestions are also given regarding how to proceed towards a...

  11. Naumoff short-rib polydactyly syndrome compounded with Mohr oral-facial-digital syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Young, L.W.; Wilhelm, L.L. [Loma Linda Univ., CA (United States). Medical Center; Zuppan, C.W. [Div. of Pediatric Pathology, Loma Linda University Medical Center, CA (United States); Clark, R. [Div. of Medical Genetics, Loma Linda University Medical Center, CA (United States)

    2001-01-01

    A stillborn baby boy had findings of severe constitutional dwarfism with short limbs, short ribs, and polydactyly that were consistent with Naumoff (type III) short-rib polydactyly syndrome. He also had additional congenital anomalies, including cleft palate, notching of the upper lip, small tongue with accessory sublingual tissue. These oral and pharyngeal anomalies were consistent with Mohr (type II) oral-facial-digital syndrome. We suggest the stillborn infant represented a compound of Naumoff short-rib polydactyly syndrome (SRPS-III) and Mohr oral-facial-digital syndrome (OFDS-II). (orig.)

  12. Naumoff short-rib polydactyly syndrome compounded with Mohr oral-facial-digital syndrome

    International Nuclear Information System (INIS)

    A stillborn baby boy had findings of severe constitutional dwarfism with short limbs, short ribs, and polydactyly that were consistent with Naumoff (type III) short-rib polydactyly syndrome. He also had additional congenital anomalies, including cleft palate, notching of the upper lip, small tongue with accessory sublingual tissue. These oral and pharyngeal anomalies were consistent with Mohr (type II) oral-facial-digital syndrome. We suggest the stillborn infant represented a compound of Naumoff short-rib polydactyly syndrome (SRPS-III) and Mohr oral-facial-digital syndrome (OFDS-II). (orig.)

  13. Langerhans Cell Histiocytosis of the Rib in an Adult: A Case Report

    Science.gov (United States)

    Kim, Sung Hyun; Choi, Moon Young

    2016-01-01

    Single-site, single-system Langerhans cell histiocytosis (LCH) of the rib is one of the rarest causes of bone tumor in adults. Herein, we report a case of a healthy 35-year-old male who presented with upper back pain that was attributed to a solitary osteolytic lesion at the posterolateral aspect of his sixth rib. For diagnostic confirmation and treatment, partial resection of the sixth rib was performed and pathologic finding was consistent with LCH. At the final follow-up after 2 years, no local recurrence or metastasis was observed. PMID:26933424

  14. Multiple Rib Exostoses in a Boy: A Rare Case Resulting in Surgery Secondary to Cosmetic Concerns

    OpenAIRE

    Masoum, Seyed Hosein Fattahi; Moradi, Ali; Mohammad H. Ebrahimzadeh

    2014-01-01

    A seven year-old boy with several painless masses on the ribs and shoulder was referred to our hospital. The masses were so prominent that they prevented the child’s sleep. Since the patient had been ridiculed by his friends due to the rib prominences, he had refused to attend school. After clinical and radiological evaluations, the masses were diagnosed as hereditary multiple exostoses of the shoulder and ribs. He underwent surgery for cosmetic reasons resulting in the patient’s return to a ...

  15. The ribs unfolded - a CT visualization algorithm for fast detection of rib fractures: effect on sensitivity and specificity in trauma patients

    International Nuclear Information System (INIS)

    To assess a radiologist's detection rate of rib fractures in trauma CT when reading curved planar reformats (CPRs) of the ribs compared to reading standard MPRs. Two hundred and twenty trauma CTs (146 males, 74 females) were retrospectively subjected to a software algorithm to generate CPRs of the ribs. Patients were split into two equal groups. Sixteen patients were excluded due to insufficient segmentation, leaving 107 patients in group A and 97 patients in group B. Two radiologists independently evaluated group A using CPRs and group B using standard MPRs. Two different radiologists reviewed both groups with the inverse methods setting. Results were compared to a standard of reference created by two senior radiologists. The reference standard identified 361 rib fractures in 61 patients. Reading CPRs showed a significantly higher overall sensitivity (P < 0.001) for fracture detection than reading standard MPRs, with 80.9 % (584/722) and 71.5 % (516/722), respectively. Mean reading time was significantly shorter for CPRs (31.3 s) compared to standard MPRs (60.7 s; P < 0.001). Using CPRs for the detection of rib fractures accelerates the reading of trauma patient chest CTs, while offering an increased overall sensitivity compared to conventional standard MPRs. (orig.)

  16. The ribs unfolded - a CT visualization algorithm for fast detection of rib fractures: effect on sensitivity and specificity in trauma patients

    Energy Technology Data Exchange (ETDEWEB)

    Ringl, Helmut; Lazar, Mathias; Toepker, Michael; Woitek, Ramona; Prosch, Helmut; Asenbaum, Ulrika; Balassy, Csilla; Toth, Daniel; Weber, Michael; Mang, Thomas [Medical University of Vienna, Department of Biomedical Imaging and Image-guided Therapy, Vienna (Austria); Hajdu, Stefan [Medical University of Vienna, Department of Trauma Surgery, Vienna (Austria); Soza, Grzegorz; Wimmer, Andreas [Siemens AG, Healthcare Sector, Computed Tomography, Forchheim (Germany)

    2015-07-15

    To assess a radiologist's detection rate of rib fractures in trauma CT when reading curved planar reformats (CPRs) of the ribs compared to reading standard MPRs. Two hundred and twenty trauma CTs (146 males, 74 females) were retrospectively subjected to a software algorithm to generate CPRs of the ribs. Patients were split into two equal groups. Sixteen patients were excluded due to insufficient segmentation, leaving 107 patients in group A and 97 patients in group B. Two radiologists independently evaluated group A using CPRs and group B using standard MPRs. Two different radiologists reviewed both groups with the inverse methods setting. Results were compared to a standard of reference created by two senior radiologists. The reference standard identified 361 rib fractures in 61 patients. Reading CPRs showed a significantly higher overall sensitivity (P < 0.001) for fracture detection than reading standard MPRs, with 80.9 % (584/722) and 71.5 % (516/722), respectively. Mean reading time was significantly shorter for CPRs (31.3 s) compared to standard MPRs (60.7 s; P < 0.001). Using CPRs for the detection of rib fractures accelerates the reading of trauma patient chest CTs, while offering an increased overall sensitivity compared to conventional standard MPRs. (orig.)

  17. Heat Transfer and Friction Characteristics of the Microfluidic Heat Sink with Variously-Shaped Ribs for Chip Cooling

    Directory of Open Access Journals (Sweden)

    Gui-Lian Wang

    2015-04-01

    Full Text Available This paper experimentally and numerically investigated the heat transfer and friction characteristics of microfluidic heat sinks with variously-shaped micro-ribs, i.e., rectangular, triangular and semicircular ribs. The micro-ribs were fabricated on the sidewalls of microfluidic channels by a surface-micromachining micro-electro-mechanical system (MEMS process and used as turbulators to improve the heat transfer rate of the microfluidic heat sink. The results indicate that the utilizing of micro-ribs provides a better heat transfer rate, but also increases the pressure drop penalty for microchannels. Furthermore, the heat transfer and friction characteristics of the microchannels are strongly affected by the rib shape. In comparison, the triangular ribbed microchannel possesses the highest Nusselt number and friction factor among the three rib types.

  18. Heat transfer and friction characteristics of the microfluidic heat sink with variously-shaped ribs for chip cooling.

    Science.gov (United States)

    Wang, Gui-Lian; Yang, Da-Wei; Wang, Yan; Niu, Di; Zhao, Xiao-Lin; Ding, Gui-Fu

    2015-01-01

    This paper experimentally and numerically investigated the heat transfer and friction characteristics of microfluidic heat sinks with variously-shaped micro-ribs, i.e., rectangular, triangular and semicircular ribs. The micro-ribs were fabricated on the sidewalls of microfluidic channels by a surface-micromachining micro-electro-mechanical system (MEMS) process and used as turbulators to improve the heat transfer rate of the microfluidic heat sink. The results indicate that the utilizing of micro-ribs provides a better heat transfer rate, but also increases the pressure drop penalty for microchannels. Furthermore, the heat transfer and friction characteristics of the microchannels are strongly affected by the rib shape. In comparison, the triangular ribbed microchannel possesses the highest Nusselt number and friction factor among the three rib types. PMID:25912351

  19. Anterior cruciate ligament reconstruction

    International Nuclear Information System (INIS)

    This paper determines the efficacy of MR imaging in evaluation of the anterior cruciate ligament (ACL) following reconstructive surgery. Forty-three MR examinations were performed in 33 patients who had undergone previous arthroscopic ACL reconstruction with patellar bone-tendon- bone autografts (postoperative period, 1-24 months; mean, 5.2 months). Of the 40 studies performed in clinically stable knees (30 patients), MR demonstrated a well-defined, signal void ACL graft in 36. Of the three studies performed in three patients with clinical ACL laxity or suspected tear, the neoligament was of intermediate definition in one and nondiscernible in the other two. As in the native knee, buckling of the PCL was suggestive of ACL insufficiency. Bone tunnel placement, patellar tendon changes, and joint effusions were also evaluated

  20. Anterior hip pain.

    Science.gov (United States)

    O'Kane, J W

    1999-10-15

    Anterior hip pain is a common complaint with many possible causes. Apophyseal avulsion and slipped capital femoral epiphysis should not be overlooked in adolescents. Muscle and tendon strains are common in adults. Subsequent to accurate diagnosis, strains should improve with rest and directed conservative treatment. Osteoarthritis, which is diagnosed radiographically, generally occurs in middle-aged and older adults. Arthritis in younger adults should prompt consideration of an inflammatory cause. A possible femoral neck stress fracture should be evaluated urgently to prevent the potentially significant complications associated with displacement. Patients with osteitis pubis should be educated about the natural history of the condition and should undergo physical therapy to correct abnormal pelvic mechanics. "Sports hernias," nerve entrapments and labral pathologic conditions should be considered in athletic adults with characteristic presentations and chronic symptoms. Surgical intervention may allow resumption of pain-free athletic activity. PMID:10537384

  1. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... and E-poly antioxidant-infused technology during a hip replacement through the anterior supine intramuscular approach. “OR- ... Dr. Keith Berend perform an anterior approach total hip replacement with the patient on a regular OR ...

  2. Exercise-induced rib stress fractures: influence of reduced bone mineral density

    DEFF Research Database (Denmark)

    Vinther, Anders; Kanstrup, Inge-Lis; Christiansen, Erik; Alkjaer, T; Larsson, Benny; Magnusson, S Peter; Aagaard, Per

    2005-01-01

    Exercise-induced rib stress fractures have been reported frequently in elite rowers during the past decade. The etiology of rib stress fractures is unclear, but low bone mineral density (BMD) has been suggested to be a potential risk factor for stress fractures in weight-bearing bones. The present...... study investigated BMD in seven Danish national team rowers with previous rib stress fracture (RSF) and 7 controls (C) matched for gender, age, height, weight and training experience. Total body scan and specific scans of the lumbar spine (L2-L4), femoral neck and distal radius were performed using a...... density may be a potential risk factor for the development of exercise-induced rib stress fractures in elite rowers....

  3. Schlieren visualization of water natural convection in a vertical ribbed channel

    Science.gov (United States)

    Fossa, M.; Misale, M.; Tanda, G.

    2015-11-01

    Schlieren techniques are valuable tools for the qualitative and quantitative visualizations of flows in a wide range of scientific and engineering disciplines. A large number of schlieren systems have been developed and documented in the literature; majority of applications involve flows of gases, typically air. In this work, a schlieren technique is applied to visualize the buoyancy-induced flow inside vertical ribbed channels using water as convective fluid. The test section consists of a vertical plate made of two thin sheets of chrome-plated copper with a foil heater sandwiched between them; the external sides of the plate are roughened with transverse, square-cross-sectioned ribs. Two parallel vertical walls, smooth and unheated, form with the heated ribbed plate two adjacent, identical and asymmetrically heated, vertical channels. Results include flow schlieren visualizations with colour-band filters, reconstructions of the local heat transfer coefficient distributions along the ribbed surfaces and comparisons with past experiments performed using air as working fluid.

  4. Effect of adiabatic square ribs on natural convection in an asymmetrically heated channel

    Science.gov (United States)

    Abidi-Saad, Aissa; Kadja, Mahfoud; Popa, Catalin; Polidori, Guillaume

    2016-06-01

    A 2-D numerical simulation is carried out to investigate the effect of two adiabatic square ribs on laminar flow and heat transfer in an asymmetrically heated channel. The two ribs are symmetrically located on each wall, exactly above the heating zone. The computational procedure is made by solving the unsteady bi-dimensional continuity, momentum and energy equations with the finite volume method. The investigations focused more specifically on the influence of ribs sizes on the flow structure and heat transfer enhancement. The results showed that the variation of ribs sizes significantly alters the heat transfer and fluid flow distribution along the channel, especially in the vicinity of protrusions. Also, the results show that streamlines, isotherms, and the number, sizes and formation of vortex structures inside the channel strongly depend on the size of protrusions. The changes in heat transfer parameters have also been presented.

  5. Modal density and modal distribution of bending wave vibration fields in ribbed plates

    DEFF Research Database (Denmark)

    Dickow, Kristoffer Ahrens; Brunskog, Jonas; Ohlrich, Mogens

    2013-01-01

    Plates reinforced by ribs or joists are common elements in lightweight building structures, as well as in other engineering structures such as vehicles, ships, and aircraft. These structures, however, are often not well suited for simple structural acoustic prediction models such as statistical...... energy analysis. One reason is that the modal density is not uniformly distributed due to the spatial periodicity introduced by the ribs. This phenomenon is investigated in the present paper, using a modal model of a ribbed plate. The modal model uses the Fourier sine modes, and the coupling between the...... plate and ribs is incorporated using Hamilton's principle. This model is then used to investigate the modal density of the considered spatially periodic structure, and a grouping of the modes in different dominating directions is proposed. Suggestions are also given regarding how to proceed towards a...

  6. DNS of velocity and thermal fields in turbulent channel flow with transverse-rib roughness

    International Nuclear Information System (INIS)

    A detailed knowledge of both velocity and thermal fields in wall turbulence disturbed by a row of ribs on the wall is important for clarifying the chief factors of fluid and thermal dynamics related to the control of heat transfer. In this study, in order to elucidate the effects of roughness on the statistical quantities in the velocity and thermal fields, direct numerical simulations (DNS) of heat transfer in turbulent channel flows with transverse-rib roughness have been performed by varying their spacing, width and height, in which the turbulent heat transfer with k-type and d-type roughness walls are simulated. It is found that since turbulent mixing is promoted by arranging ribs, the distributions of mean velocity and temperature become markedly asymmetric. Systematic variations of secondary flow patterns between ribs are clearly identified. The best heat transfer performance is found to be obtained with the k-type roughness

  7. Thoracic outlet syndrome caused by hydatid cyst of the first rib-rare but important.

    Science.gov (United States)

    Levy Faber, Dan; Best, Lael-Anson; Militianu, Daniela; Ben Nun, Alon

    2010-12-01

    Hydatid cysts are usually located in the liver and lungs. Skeletal echinococcosis is relatively rare and that of the rib is exceptional. Less than 50 cases of costal echinococcosis have been reported in the literature so far. To our knowledge, only one case report of thoracic outlet syndrome due to echinococcal cyst in the first rib was described in 1995. Accurate pre-operative diagnosis is important but may be challenging in some cases. Reported here is a case of echinococcosis of the first rib in a young adult who was presented with thoracic outlet syndrome. Plain chest radiograph, CT scan and MRI were performed. The imaging features were suggestive of a solitary aneurysmal bone cyst and the differential diagnosis included echinococcosis of the first rib. The lesion was completely resected and the histopathological examination confirmed the diagnosis of echinococcosis. PMID:22131660

  8. Enhancement of flow boiling of subcooled water on transverse ribbed surface

    International Nuclear Information System (INIS)

    The present work deals with enhancement of flow boiling heat transfer using transverse ribs of rectangular cross section attached on a flat heating surface. High flux cooling is envisioned in the field of the leading edge technology such as high power laser applications, advanced metallurgical processes, fusion reactors, integrated circuit chips and so forth. In such advanced cooling devices subcooled boiling of water at high velocity is expected as one of most efficient and convenient means for heat removal exceeding 107W/m2. In the present experiment, a sheet of stainless-steel (10mm wide, 0.2mm thick and 80mm in heated length) was flush mounted on one wall of a vertical rectangular channel (a cross-section 20mm x 30 mm) and used as a heating surface by passing a direct current. Transverse-ribs made of plastic plate (0.5mm thick and 30mm in lateral length) were attached at an equal longitudinal spacing on the heating surface. Longitudinal spacing of ribs was varied from 2.5, 5, 10, 20mm to infinity (a flat surface without ribs), and the rib height was 2.5mm and 5.0mm. Experiments were conducted with water at a pressure of 0.12MPa in the range of mass velocity from 500kg/m2s to 2,000kg/m2s (water velocity from 0.5m/s to 2m/s) and subcooling from 20K to 50K. It was found that the ribbed structure strongly affects heat transfer both in the non-boiling and partial nucleate boiling regimes. Enhancement rate of heat transfer coefficient varied from 5% to 50% in excess compared with that for the flat heating plate. According to visual observation of boiling bubbles the circulating flow occurred in a space between each consecutive ribs and seemed to enhance heat transfer. For narrow rib spacing a large coalesced bubble filled up each rib space and impeded the exchange of vapor with liquid, leading to heat transfer deterioration. In the present experimental range of the ribs, a 50% increase of heat transfer coefficient was attained on the ribbed surface with 5mm height

  9. Enhanced reading time efficiency by use of automatically unfolded CT rib reformations in acute trauma.

    Science.gov (United States)

    Bier, Georg; Schabel, Christoph; Othman, Ahmed; Bongers, Malte N; Schmehl, Jörg; Ditt, Hendrik; Nikolaou, Konstantin; Bamberg, Fabian; Notohamiprodjo, Mike

    2015-11-01

    Rationale of this study was to evaluate whether unfolded rib images enhance time efficiency in detection of rib fractures and time efficiency in patients with acute thoracic trauma. 51 subsequent patients with thoracic trauma underwent 64-slice computed tomography. 1mm thick axial slices were reformatted using a commercially available post-processing software application generating rotatable unfolded rib images. Diagnostic accuracy was evaluated by 3 readers and compared to multiplanar reformations of the original CT images. Reformation and evaluation times were recorded. 116 rib fractures were detected. The multiplanar reformation analysis yielded a sensitivity of 87.9%/93.9%/79.7% with a specificity of 97%/97%/82.2%, whilst the unfolded rib image analysis yielded a sensitivity of 94.8%/94.8%/92.2% and a specificity of 85.2/87.8%/82.4 (p=0.06/0.8/0.04) with high inter-observer agreement (k=0.79-0.85). The mean reading time for the multiplanar reformations was significantly longer (reader 1: 103.7 ± 27.1s/reader 2: 81.8 ± 40.6s/reader 3: 154.3 ± 39.2s) than the evaluation of the unfolded rib images (19.4 ± 4.9s/26.9 ± 15.0s/49.9 ± 18.7s; p<0.01). Concluding, the unfolded rib display reduces reading time for detection of rib fractures in acute thoracic trauma patients significantly and does not compromise the diagnostic accuracy significantly in experienced radiologists. However, unexperienced readers may profit from use of this display. PMID:26226916

  10. Rib fractures after reirradiation plus hyperthermia for recurrent breast cancer. Predictive factors

    International Nuclear Information System (INIS)

    Combining reirradiation (reRT) and hyperthermia (HT) has shown high therapeutic value for patients with locoregional recurrent breast cancer (LR). However, additional toxicity of reirradiation (e.g., rib fractures) may occur. The aim of this study is to determine the impact of potential risk factors on the occurrence of rib fractures. From 1982-2005, 234 patients were treated with adjuvant reRT + HT after surgery for LR. ReRT consisted typically of 8 fractions of 4 Gy twice a week, or 12 fractions of 3 Gy four times a week. A total of 118 patients were irradiated with abutted photon and electron fields. In all, 60 patients were irradiated using either one or alternating combinations of abutted AP electron fields. Hyperthermia was given once or twice a week. The 5-year infield local control (LC) rate was 70 %. Rib fractures were detected in 16 of 234 patients (actuarial risk: 7 % at 5 years). All rib fractures occurred in patients treated with a combination of photon and abutted electron fields (p = 0.000); in 15 of 16 patients fractures were located in the abutment regions. The other significant predictive factors for rib fractures were a higher fraction dose (p = 0.040), large RT fields, and treatment before the year 2000. ReRT + HT results in long-term LC. The majority of rib fractures were located in the photon/electron abutment area, emphasizing the disadvantage of field overlap. Large abutted photon/electron fields combined with 4 Gy fractions increase the number of rib fractures in this study group. However, as these factors were highly correlated no relative importance of the individual factors could be estimated. Increasing the number of HT sessions a week does not increase the risk of rib fractures. (orig.)

  11. Rib suppression in chest radiographs to improve classification of textural abnormalities

    Science.gov (United States)

    Hogeweg, Laurens E.; Mol, Christian; de Jong, Pim A.; van Ginneken, Bram

    2010-03-01

    The computer aided diagnosis (CAD) of abnormalities on chest radiographs is difficult due to the presence of overlapping normal anatomy. Suppression of the normal anatomy is expected to improve performance of a CAD system, but such a method has not yet been applied to the computer detection of interstitial abnormalities such as occur in tuberculosis (TB). The aim of this research is to evaluate the effect of rib suppression on a CAD system for TB. Profiles of pixel intensities sampled perpendicular to segmented ribs were used to create a local PCA-based shape model of the rib. The model was normalized to the local background intensity and corrected for gradients perpendicular to the rib. Subsequently rib suppressed images were created by subtracting the models for each rib from the original image. The effect of rib suppression was evaluated using a CAD system for TB detection. Small square image patches were sampled randomly from 15 normal and 35 TB-affected images containing textural abnormalities. Abnormalities were outlined by a radiologist and were given a subtlety rating from 1 to 5. Features based on moments of intensity distributions of Gaussian derivative filtered images were extracted. A supervised learning approach was used to discriminate between normal and diseased image patches. The use of rib suppressed images increased the overall performance of the system, as measured by the area under the receiver operator characteristic (ROC) curve, from 0.75 to 0.78. For the more subtly rated patches (rated 1-3) the performance increased from 0.62 to 0.70.

  12. Frequency of intrathoracic injuries in children younger than 3 years with rib fractures

    Energy Technology Data Exchange (ETDEWEB)

    Darling, Stephen E. [Kapiolani Children' s Hospital, The Department of Radiology, Honolulu, HI (United States); Done, Stephen L.; Friedman, Seth D. [Seattle Children' s Hospital, The Department' s of Radiology, Seattle, WA (United States); University of Washington School of Medicine, Seattle, WA (United States); Feldman, Kenneth W. [Seattle Children' s Hospital, Pediatrics, General Pediatrics Division, Seattle, WA (United States); Seattle Children' s Protection Program, Children' s Protection Program, M/S M2-10, Seattle, WA (United States); University of Washington School of Medicine, Seattle, WA (United States)

    2014-10-15

    Research documents that among children admitted to trauma intensive care units the number of rib fractures sustained indicates the child's likelihood of having and severity of intrathoracic injury. This has been misused in court to argue that children with multiple rib fractures who lack intrathoracic injury have abnormal bone fragility rather than inflicted injury. To determine frequency of intrathoracic injuries in children younger than 3 years with rib fractures in cases of child abuse and accidental trauma. We conducted a retrospective review of rib fractures caused by documented abuse or accidents from 2003 to 2010 in children treated at Seattle Children's Hospital and Harborview Medical Center. A senior pediatric radiologist and radiology fellow independently reviewed the imaging. Children with bone demineralization were excluded. Descriptive and simple comparative statistics were used. Seventy-two percent (47/65) of infants and toddlers with rib fractures were abused. Abused children had more rib fractures than accidentally injured children (5.55 vs. 3.11, P = 0.012). However intrathoracic injuries as a whole (55.6% vs. 12.8%, P < 0.001) and individual types of intrathoracic injuries were more common with accidents. Rates of other thoracic cage injuries did not differ substantially (27.8% accidents vs. 12.8% abuse, P = 0.064). Intracranial and intra-abdominal injuries and skull fractures were equally frequent, but other extrathoracic fractures were more common with abuse (70.2% vs. 16.7%, P < 0.001). Abused infants and toddlers have fewer intrathoracic injuries but more rib fractures than accidentally injured peers. This likely reflects different injury mechanics. Lack of intrathoracic injuries in abused children with rib fractures does not imply bone fragility. (orig.)

  13. Frequency of intrathoracic injuries in children younger than 3 years with rib fractures

    International Nuclear Information System (INIS)

    Research documents that among children admitted to trauma intensive care units the number of rib fractures sustained indicates the child's likelihood of having and severity of intrathoracic injury. This has been misused in court to argue that children with multiple rib fractures who lack intrathoracic injury have abnormal bone fragility rather than inflicted injury. To determine frequency of intrathoracic injuries in children younger than 3 years with rib fractures in cases of child abuse and accidental trauma. We conducted a retrospective review of rib fractures caused by documented abuse or accidents from 2003 to 2010 in children treated at Seattle Children's Hospital and Harborview Medical Center. A senior pediatric radiologist and radiology fellow independently reviewed the imaging. Children with bone demineralization were excluded. Descriptive and simple comparative statistics were used. Seventy-two percent (47/65) of infants and toddlers with rib fractures were abused. Abused children had more rib fractures than accidentally injured children (5.55 vs. 3.11, P = 0.012). However intrathoracic injuries as a whole (55.6% vs. 12.8%, P < 0.001) and individual types of intrathoracic injuries were more common with accidents. Rates of other thoracic cage injuries did not differ substantially (27.8% accidents vs. 12.8% abuse, P = 0.064). Intracranial and intra-abdominal injuries and skull fractures were equally frequent, but other extrathoracic fractures were more common with abuse (70.2% vs. 16.7%, P < 0.001). Abused infants and toddlers have fewer intrathoracic injuries but more rib fractures than accidentally injured peers. This likely reflects different injury mechanics. Lack of intrathoracic injuries in abused children with rib fractures does not imply bone fragility. (orig.)

  14. Relating the micro- and nano-structure of bone to rib fracture propagation

    OpenAIRE

    Beadle, Nicola

    2016-01-01

    Physical abuse of infants at the hand of a parent or carer is a significant and growing issue worldwide. In particular, rib fractures in the absence of major accidental trauma are highly specific for physical abuse. Despite the serious implications of physical abuse in infants, definitive knowledge regarding the hierarchical structure of the immature rib and how this influences the mechanical failure is lacking. Moreover, the diagnosis of physical abuse is often disputed in a legal setting, a...

  15. Design of 9 tesla superconducting solenoid for VECC RIB facility

    International Nuclear Information System (INIS)

    An ISOL post-accelerator type of RIB facility is being developed at our centre. The post acceleration scheme of a Radio Frequency Quadrupole (RFQ) followed by five IH LINAC cavities will provide energy of about 1.05 MeV/u. For further accelerating up to 2 MeV/u Superconducting Quarter Wave Resonators (SCQWR) will be used. The radial defocusing of the beam bunch during the acceleration using SCQWRs will be taken care of by a Superconducting Solenoid (SCS) within the same cryostat. In this report the electromagnetic design of an SCS will be discussed. A 9 T SCS having effective length of 340 mm has been designed with the special requirement that the fringing field should fall sharply to a value less than 100 mT at the surfaces of the adjacent superconducting cavities. The designed solenoid comprise of two co-axial split solenoid conductors surrounded by iron shields and a pair of bucking coils. Optimizations have been carried out for the total current sharing of the main coils and the bucking coils as well as for the relative orientation and dimension of each component of the solenoid. (author)

  16. High-efficiency target-ion sources for RIB generation

    Energy Technology Data Exchange (ETDEWEB)

    Alton, G.D.

    1993-12-31

    A brief review is given of high-efficiency ion sources which have been developed or are under development at ISOL facilities which show particular promise for use at existing, future, or radioactive ion beam (RIB) facilities now under construction. Emphasis will be placed on those sources which have demonstrated high ionization efficiency, species versatility, and operational reliability and which have been carefully designed for safe handling in the high level radioactivity radiation fields incumbent at such facilities. Brief discussions will also be made of the fundamental processes which affect the realizable beam intensities in target-ion sources. Among the sources which will be reviewed will be selected examples of state-of-the-art electron-beam plasma-type ion sources, thermal-ionization, surface-ionization, ECR, and selectively chosen ion source concepts which show promise for radioactive ion beam generation. A few advanced, chemically selective target-ion sources will be described, such as sources based on the use of laser-resonance ionization, which, in principle, offer a more satisfactory solution to isobaric contamination problems than conventional electromagnetic techniques. Particular attention will be given to the sources which have been selected for initial or future use at the Holifield Radioactive Ion Beam Facility now under construction at the Oak Ridge National Laboratory.

  17. A comparison of methods for focusing the field of a HIFU array transducer through human ribs

    Science.gov (United States)

    Gélat, P.; ter Haar, G.; Saffari, N.

    2014-06-01

    A forward model, which predicts the scattering by human ribs of a multi-element high-intensity focused ultrasound transducer, was used to investigate the efficacy of a range of focusing approaches described in the literature. This forward model is based on the boundary element method and was described by Gélat et al (2011 Phys. Med. Biol. 56 5553-81 2012 Phys. Med. Biol. 57 8471-97). The model has since been improved and features a complex surface impedance condition at the surface of the ribs. The inverse problem of focusing through the ribs was implemented on six transducer array-rib topologies and five methods of focusing were investigated, including spherical focusing, binarized apodization based on geometric ray tracing, phase conjugation and the decomposition of the time-reversal operator method. The excitation frequency was 1 MHz and the array was of spherical-section type. Both human and idealized rib topologies were considered. The merit of each method of focusing was examined. It was concluded that the constrained optimization approach offers greater potential than the other focusing methods in terms of maximizing the ratio of acoustic pressure magnitudes at the focus to those on the surface of the ribs whilst taking full advantage of the dynamic range of the phased array.

  18. A Study on the Performance of the Split Reaction Water Turbine with Guide Ribs

    Science.gov (United States)

    Allen, Deuel H.; Villanueva, Eliseo P.

    2015-09-01

    The development of technologies that make use of renewable energy is of great significance presently. A new kind of turbine called Split Reaction Water Turbine (SRWT) using PVC pipes as material is a major contribution towards harnessing the energy potentials of small stream low head water resources. SRWTs of diameter to height ratio (D/H = 110 cm/160 cm) were tested at the MSU-IIT College of Engineering Fluid Engineering Laboratory. Data on volumetric flow and pressure head at the turbine inlet of the SRWT were recorded using National Instrument Data Processing System using LabView software. In later experiments, guide ribs were installed at the vane of the exit nozzles in order to determine the difference in the performance of the ribbed and the non-ribbed SRWT. Simulations of the running SRWT were conducted using SOLIDWORKS software. Results of the simulations aided in the thorough analyses of the data from the experimental runs. A comparison of data from the ribbed and non-ribbed SRWT shows that guide ribs were effective in directing the momentum of the exiting water to improve the speed of rotation. In this study, the increase in the speed of the Split Reaction Water Turbine was as much as 46%.

  19. Regional effects of ovariectomy and cadmium on bone mineral in ribs from aged female beagles

    Energy Technology Data Exchange (ETDEWEB)

    Hurst, D.R. (Miami Univ., Oxford, OH (USA). Dept. of Zoology)

    1991-01-01

    The purpose of this study was to evaluate effects of estrogen depletion and cadmium (Cd) on bone calcium and to determine if these effects were localized in specific regions of ribs. Fourteen female beagles with {sup 45}Ca labeled skeletons were divided into four groups: sham controls (SO{minus}); ovariectomized (OV{minus}); shams exposed to Cd (SO+); ovariecomized exposed to Cd (OV+). Total Cd exposure period was 7 months, including 1 month by capsules and 6 months by drinking H{sub 2}O. Ribs were taken at necropsy from 12 of the 14 dogs, and each rib was quartered. Wet, dry, and ash weights, as well as total Ca and {sup 45}Ca content, were determined for each quarter. Analysis of ribs from control animals demonstrated that a given rib is heterogeneous in composition. One end appears to be less mineralized and more metabolically active than other regions. The OV{minus} and OV+ mid-rib regions had significantly lower dry and ash weights than SO{minus}. Total Ca contents of these same regions were also decreased in the OV{minus} and OV+. The only significant change in Ca/dry and Ca/ash was observed when comparing OV+ to SO{minus}. Analysis of treatment suggests that there are regional effects following ovariectomy increased the loss of bone mineral occurring as a result of ovariectomy. 30 refs., 1 fig.

  20. Atlas-based rib-bone detection in chest X-rays.

    Science.gov (United States)

    Candemir, Sema; Jaeger, Stefan; Antani, Sameer; Bagci, Ulas; Folio, Les R; Xu, Ziyue; Thoma, George

    2016-07-01

    This paper investigates using rib-bone atlases for automatic detection of rib-bones in chest X-rays (CXRs). We built a system that takes patient X-ray and model atlases as input and automatically computes the posterior rib borders with high accuracy and efficiency. In addition to conventional atlas, we propose two alternative atlases: (i) automatically computed rib bone models using Computed Tomography (CT) scans, and (ii) dual energy CXRs. We test the proposed approach with each model on 25 CXRs from the Japanese Society of Radiological Technology (JSRT) dataset and another 25 CXRs from the National Library of Medicine CXR dataset. We achieve an area under the ROC curve (AUC) of about 95% for Montgomery and 91% for JSRT datasets. Using the optimal operating point of the ROC curve, we achieve a segmentation accuracy of 88.91±1.8% for Montgomery and 85.48±3.3% for JSRT datasets. Our method produces comparable results with the state-of-the-art algorithms. The performance of our method is also excellent on challenging X-rays as it successfully addressed the rib-shape variance between patients and number of visible rib-bones due to patient respiration. PMID:27156048

  1. Rib head protrusion into the central canal in type 1 neurofibromatosis

    International Nuclear Information System (INIS)

    Intraspinal rib head dislocation is an important but under-recognized consequence of dystrophic scoliosis in patients with neurofibromatosis 1 (NF1). To present clinical and imaging findings of intraspinal rib head dislocation in NF1. We retrospectively reviewed clinical presentation, imaging, operative reports and post-operative courses in four NF1 patients with intraspinal rib head dislocation and dystrophic scoliosis. We also reviewed 17 cases from the English literature. In each of our four cases of intraspinal rib head dislocation, a single rib head was dislocated on the convex apex of the curve, most often in the mid- to lower thoracic region. Cord compression occurred in half of these patients. Analysis of the literature yielded similar findings. Only three cases in the literature demonstrates the MRI appearance of this entity; most employ CT. All of our cases include both MRI and CT; we review the subtle findings on MRI. Although intraspinal rib head dislocation is readily apparent on CT, sometimes MRI is the only cross-sectional imaging performed. It is essential that radiologists become familiar with this entity, as subtle findings have significant implications for surgical management. (orig.)

  2. Regional effects of ovariectomy and cadmium on bone mineral in ribs from aged female beagles

    International Nuclear Information System (INIS)

    The purpose of this study was to evaluate effects of estrogen depletion and cadmium (Cd) on bone calcium and to determine if these effects were localized in specific regions of ribs. Fourteen female beagles with 45Ca labeled skeletons were divided into four groups: sham controls (SO-); ovariectomized (OV-); shams exposed to Cd (SO+); ovariecomized exposed to Cd (OV+). Total Cd exposure period was 7 months, including 1 month by capsules and 6 months by drinking H2O. Ribs were taken at necropsy from 12 of the 14 dogs, and each rib was quartered. Wet, dry, and ash weights, as well as total Ca and 45Ca content, were determined for each quarter. Analysis of ribs from control animals demonstrated that a given rib is heterogeneous in composition. One end appears to be less mineralized and more metabolically active than other regions. The OV- and OV+ mid-rib regions had significantly lower dry and ash weights than SO-. Total Ca contents of these same regions were also decreased in the OV- and OV+. The only significant change in Ca/dry and Ca/ash was observed when comparing OV+ to SO-. Analysis of treatment suggests that there are regional effects following ovariectomy increased the loss of bone mineral occurring as a result of ovariectomy. 30 refs., 1 fig

  3. Retrospective evaluation and dating of non-accidental rib fractures in infants

    International Nuclear Information System (INIS)

    Aim: To describe the sequential appearance of healing rib fractures on initial and follow-up radiographs using published guidelines in approximating the age of rib fractures in infants with the aim of establishing a more objective method of dating rib fractures by measuring the thickness of the callous formation. Materials and methods: This was a retrospective analysis of initial and follow-up digital skeletal surveys of infants less than 12 months of age performed between January 2008 and January 2012 at the University of California Davis Children's Hospital. Six radiological features of rib fractures evaluating the appearance of the callous formation (C stage) and fracture line (F stage) were assessed. Patients with osteogenesis imperfecta, known vitamin D deficiency, and skeletal or metabolic dysplasia were not included in the study. Thereafter, callous thickness was measured and recorded for each stage. Results: Sixteen infants (age range 1–11 months, seven males and nine females) with 23 rib fractures were analysed. The thickness of the callous formation follows a predictable pattern advancing one stage after a 2-week follow-up with progressive callous thickening starting from stage 2, peaks at around stage 4, and then tapers and remodels until it almost disappears when the fracture is healed at stage 6. Conclusion: It appears that rib fractures in infants follow a predictable pattern of healing. Measuring the thickness of the callous formation is a more objective way of guiding the radiologist in estimating the age of the fracture

  4. A comparison of methods for focusing the field of a HIFU array transducer through human ribs

    International Nuclear Information System (INIS)

    A forward model, which predicts the scattering by human ribs of a multi-element high-intensity focused ultrasound transducer, was used to investigate the efficacy of a range of focusing approaches described in the literature. This forward model is based on the boundary element method and was described by Gélat et al (2011 Phys. Med. Biol. 56 5553–81; 2012 Phys. Med. Biol. 57 8471–97). The model has since been improved and features a complex surface impedance condition at the surface of the ribs. The inverse problem of focusing through the ribs was implemented on six transducer array-rib topologies and five methods of focusing were investigated, including spherical focusing, binarized apodization based on geometric ray tracing, phase conjugation and the decomposition of the time-reversal operator method. The excitation frequency was 1 MHz and the array was of spherical-section type. Both human and idealized rib topologies were considered. The merit of each method of focusing was examined. It was concluded that the constrained optimization approach offers greater potential than the other focusing methods in terms of maximizing the ratio of acoustic pressure magnitudes at the focus to those on the surface of the ribs whilst taking full advantage of the dynamic range of the phased array. (paper)

  5. Characterizing the dynamics of a flexible rod wrapped by transverse repeated ribs subjected to axial flow

    Energy Technology Data Exchange (ETDEWEB)

    Perets, Y., E-mail: yaronprts@gmail.com [Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer-Sheva (Israel); Sher, E. [Faculty of Aerospace Engineering, Technion – Israel Institute of Technology, Haifa (Israel); Harari, R. [Nuclear Research Center – Negev (NRCN), Beer-Sheva (Israel)

    2014-04-01

    Highlights: • The dynamic instability of a repeated ribs cylindrical rod in annular axial flow geometry was studied. • The results indicate a strong dependency between rod instability and rib roughness. • The rod dynamics become stabilized when the pitch-to-height ratio of the ribs increases. • Increase of the rib width-to-height ratio destabilizes the rod. • The nonlinear model confirms the existence of post critical instability and the reliability of the linear results. - Abstract: This study focuses on the dynamics of a flexible cylindrical structure wrapped by repeated transverse rectangular ribs, in an annular flow geometry, under two boundary conditions: simply supported ends and clamped ends. The dynamics is predicted by linear and nonlinear theories. Based on the linear equation a straightforward nonlinear equation can be derived. A parametric investigation of the effect of the ribs’ dimensionless geometry characterized by the pitch-to-height and width-to-height ratios, on the fluid-elastic instability characteristics is considered. The results of the present study indicate a strong dependency between rod instability and rib roughness. The nonlinear model confirms the existence of post critical instability and the reliability of the linear results.

  6. Pulmonary nodule registration in serial CT scans based on rib anatomy and nodule template matching

    International Nuclear Information System (INIS)

    An automated method is being developed in order to identify corresponding nodules in serial thoracic CT scans for interval change analysis. The method uses the rib centerlines as the reference for initial nodule registration. A spatially adaptive rib segmentation method first locates the regions where the ribs join the spine, which define the starting locations for rib tracking. Each rib is tracked and locally segmented by expectation-maximization. The ribs are automatically labeled, and the centerlines are estimated using skeletonization. For a given nodule in the source scan, the closest three ribs are identified. A three-dimensional (3D) rigid affine transformation guided by simplex optimization aligns the centerlines of each of the three rib pairs in the source and target CT volumes. Automatically defined control points along the centerlines of the three ribs in the source scan and the registered ribs in the target scan are used to guide an initial registration using a second 3D rigid affine transformation. A search volume of interest (VOI) is then located in the target scan. Nodule candidate locations within the search VOI are identified as regions with high Hessian responses. The initial registration is refined by searching for the maximum cross-correlation between the nodule template from the source scan and the candidate locations. The method was evaluated on 48 CT scans from 20 patients. Experienced radiologists identified 101 pairs of corresponding nodules. Three metrics were used for performance evaluation. The first metric was the Euclidean distance between the nodule centers identified by the radiologist and the computer registration, the second metric was a volume overlap measure between the nodule VOIs identified by the radiologist and the computer registration, and the third metric was the hit rate, which measures the fraction of nodules whose centroid computed by the computer registration in the target scan falls within the VOI identified by the

  7. Primary extra-renal clear cell renal cell carcinoma masquerading as an adrenal mass: A diagnostic challenge

    Directory of Open Access Journals (Sweden)

    Roumina Hasan

    2015-01-01

    Full Text Available We present the first case of a nonmetastasizing renal cell carcinoma (RCC masquerading as an adrenal mass, in the presence of normal bilateral native kidneys, in a young adult. The possibility of this mass developing in a supernumerary kidney was ruled out, since no identifiable renal tissue, pelvis or ureters was seen within the mass, nor was any separate systemic arterial supply to the mass seen. The diagnosis of extra-renal clear cell RCC was based on cyto-morphological features, further confirmed by immunohistochemistry findings. The origin of this extra-renal clear cell renal cell is proposed to be from the mesodermal embryonic rests.

  8. Primary extra-renal clear cell renal cell carcinoma masquerading as an adrenal mass: A diagnostic challenge

    Science.gov (United States)

    Hasan, Roumina; Kumar, Sandeep; Monappa, Vidya; Ayachit, Anurag

    2015-01-01

    We present the first case of a nonmetastasizing renal cell carcinoma (RCC) masquerading as an adrenal mass, in the presence of normal bilateral native kidneys, in a young adult. The possibility of this mass developing in a supernumerary kidney was ruled out, since no identifiable renal tissue, pelvis or ureters was seen within the mass, nor was any separate systemic arterial supply to the mass seen. The diagnosis of extra-renal clear cell RCC was based on cyto-morphological features, further confirmed by immunohistochemistry findings. The origin of this extra-renal clear cell renal cell is proposed to be from the mesodermal embryonic rests. PMID:26692677

  9. Dosemetric Parameters Predictive of Rib Fractures after Proton Beam Therapy for Early-Stage Lung Cancer.

    Science.gov (United States)

    Ishikawa, Yojiro; Nakamura, Tatsuya; Kato, Takahiro; Kadoya, Noriyuki; Suzuki, Motohisa; Azami, Yusuke; Hareyama, Masato; Kikuchi, Yasuhiro; Jingu, Keiichi

    2016-01-01

    Proton beam therapy (PBT) is the preferred modality for early-stage lung cancer. Compared with X-ray therapy, PBT offers good dose concentration as revealed by the characteristics of the Bragg peak. Rib fractures (RFs) after PBT lead to decreased quality of life for patients. However, the incidence of and the risk factors for RFs after PBT have not yet been clarified. We therefore explored the relationship between irradiated rib volume and RFs after PBT for early-stage lung cancer. The purpose of this study was to investigate the incidence and the risk factors for RFs following PBT for early-stage lung cancer. We investigated 52 early-stage lung cancer patients and analyzed a total of 215 irradiated ribs after PBT. Grade 2 RFs occurred in 12 patients (20 ribs); these RFs were symptomatic without displacement. No patient experienced more severe RFs. The median time to grade 2 RFs development was 17 months (range: 9-29 months). The three-year incidence of grade 2 RFs was 30.2%. According to the analysis comparing radiation dose and rib volume using receiver operating characteristic curves, we demonstrated that the volume of ribs receiving more than 120 Gy3 (relative biological effectiveness (RBE)) was more than 3.7 cm(3) at an area under the curve of 0.81, which increased the incidence of RFs after PBT (P < 0.001). In this study, RFs were frequently observed following PBT for early-stage lung cancer. We demonstrated that the volume of ribs receiving more than 120 Gy3 (RBE) was the most significant parameter for predicting RFs. PMID:27087118

  10. Cronkhite-Canada syndrome associated with rib fractures: a case report

    Directory of Open Access Journals (Sweden)

    Wan Haijun

    2010-10-01

    Full Text Available Abstract Background Cronkhite-Canada syndrome (CCS is a rare multiple gastrointestinal polyposis. Up till now, many complications of CCS have been reported in the literature, but rib fracture is not included. Case Presentation We report a case of a 58-year-old man who was admitted to our hospital with a 6-month history of frequent diarrhea, intermittent hematochezia and a weight loss of 13 kg. On admission, physical examination revealed alopecia of the scalp, hyperpigmentation of the hands and soles, and dystrophy of the fingernails. Laboratory data revealed hypocalcaemia and hypoproteinemia. Esophagogastroduodenoscopy, video capsule endoscopy and colonoscopy revealed various sizes of generalized gastrointestinal polyps. Histological examination of the biopsy specimens obtained from the stomach and the colon showed adenomatous polyp and inflammatory polyp respectively. Thus, a diagnosis of CCS was made. After treatment with corticosteroids for 24 days and nutritional support for two months, his clinical condition improved. Two months later, he was admitted to our hospital for the second time with frequent diarrhea and weight loss. The chest radiography revealed fractures of the left sixth and seventh ribs. Examinations, including emission computed tomography, bone densitometry test, and other serum parameters, were performed, but could not identify the definite etiology of the rib fractures. One month later, the patient suffered from aggravating multiple rib fractures due to the ineffective treatment, persistent hypocalcaemia and malnutrition. Conclusions This is the first case of a CCS patient with multiple rib fractures. Although the association between CCS and multiple rib fractures in this case remains uncertain, we presume that persistent hypocalcaemia and malnutrition contribute to this situation, or at least aggravate this rare complication. Besides, since prolonged corticosteroid therapy will result in an increased risk of osteoporotic

  11. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... Taperloc Microplasty stem and E-poly antioxidant-infused technology during a hip replacement through the anterior supine ... renewed interest at this time due to several advantages that it brings. The approach that is performed ...

  12. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... an anterior approach total hip replacement with the patient on a regular OR table supine. My name ... less invasive without being small incision surgery. Obese patients can be easier due to less distribution of ...

  13. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... it to have any real negative or deleterious effect by removing the anterior capsule. Now I would ... is what happens with one of the competitive designs. Like I told you, I just take a ...

  14. Anterior approach for knee arthrography

    International Nuclear Information System (INIS)

    Objective. To develop a new method of magnetic resonance arthrography (MRA) of the knee using an anterior approach analogous to the portals used for knee arthroscopy.Design. An anterior approach to the knee joint was devised mimicking anterior portals used for knee arthroscopy. Seven patients scheduled for routine knee MRA were placed in a decubitus position and under fluoroscopic guidance a needle was advanced from a position adjacent to the patellar tendon into the knee joint. After confirmation of the needle tip location, a dilute gadolinium solution was injected.Results and conclusion. All the arthrograms were technically successful. The anterior approach to knee MRA has greater technical ease than the traditional approach with little patient discomfort. (orig.)

  15. Subcutaneous Fungal Cyst Masquerading as Benign Lesions – A Series of Eight Cases

    Science.gov (United States)

    Varghese, Renu G’Boy; Phansalkar, Manjiri; Ramdas, Anita; K, Authy; G, Thangiah

    2015-01-01

    Background Subcutaneous fungal infections are caused by penetration of the causative fungi into the subcutaneous layer and are usually localised. We present a series of eight cases with subcutaneous fungal cystic lesions masquerading as benign lesions. Materials and Methods A retrospective study was conducted on subcutaneous fungal infections seen between January 2007 to July 2014 in the Department of Pathology. Eight patients with biopsy proven subcutaneous fungal infection were included. We collected and analysed their demographic, clinical and histopathological details. Results Among eight patients, six were male and two were female. The mean age was 47 years (Range: 21-70). All the eight patients presented with non-tender cystic swelling. The size of the swellings varied from a minimum of 3x3 cm to maximum of 10x4 cm. Out of eight, hand was involved in three, forearm in one, elbow in two, leg in one and foot in one. On H&E staining, all the cases showed fibro collagenous cyst wall, lined by histiocytes, granulomatous reaction, foreign body type of giant cells with acute and chronic inflammatory infiltrate containing fungal elements. Six were identified as hyalohyphomycosis and two were identified as phaeohyphomycotic cysts based on pigmentation of hyphae. Conclusion Fungal infection should be suspected in all subcutaneous cystic lesions. Excised tissue should always be sent for culture and histopathology. PMID:26557537

  16. High-mass twins & resolution of the reconfinement, masquerade and hyperon puzzles of compact star interiors

    Energy Technology Data Exchange (ETDEWEB)

    Blaschke, David [Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980 Dubna (Russian Federation); Instytut Fizyki Teoretycznej, Uniwersytet Wroclawski, 50-204 Wroclaw (Poland); Alvarez-Castillo, David E. [Bogoliubov Laboratory for Theoretical Physics, JINR Dubna, 141980 Dubna (Russian Federation); Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México (Mexico)

    2016-01-22

    We aim at contributing to the resolution of three of the fundamental puzzles related to the still unsolved problem of the structure of the dense core of compact stars (CS): (i) the hyperon puzzle: how to reconcile pulsar masses of 2 M{sub ⊙} with the hyperon softening of the equation of state (EoS); (ii) the masquerade problem: modern EoS for cold, high density hadronic and quark matter are almost identical; and (iii) the reconfinement puzzle: what to do when after a deconfinement transition the hadronic EoS becomes favorable again? We show that taking into account the compositeness of baryons (by excluded volume and/or quark Pauli blocking) on the hadronic side and confining and stiffening effects on the quark matter side results in an early phase transition to quark matter with sufficient stiffening at high densities which removes all three present-day puzzles of CS interiors. Moreover, in this new class of EoS for hybrid CS falls the interesting case of a strong first order phase transition which results in the observable high mass twin star phenomenon, an astrophysical observation of a critical endpoint in the QCD phase diagram.

  17. Castleman Disease of Hyaline Vascular Type in the Infrathyroidal Region: A Masquerader of Parathyroid Adenoma

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sang Kwon; Kwon, Sun Young [Dongsan Medical Center, Keimyung University School of Medicine, Daegu (Korea, Republic of)

    2013-03-15

    Castleman disease of the infrathyroidal region is extremely rare. We report both CT and sonographic findings of a case of infrathyroidal paratracheal Castleman disease of hyaline vascular type, which masquerades parathyroid adenoma, in a 48-year-old woman. We further provide its histological findings at sonographically guided core-needle biopsy (US-CNB) and excisional biopsy. The lesion was ovoid with homogeneous intense enhancement on contrast-enhanced CT (CECT), and was homogeneous, markedly hypoechoic, and hypervascular on ultrasonography (US). Histological findings of the specimen obtained by US-CNB suggested lymphoproliferative lesion, and thus was inconclusive; those obtained by excisional biopsy were characteristics of Castleman disease of hyaline vascular type. Hyaline vascular type Castleman's disease should be included in the differential diagnosis of a mass of the infrathyroidal region with homogeneous intense enhancement on CECT, as well as with marked hypoechogenicity and hypervascularity on US. US-CNB may be of limited value in the histological diagnosis of this entity.

  18. High-mass twins & resolution of the reconfinement, masquerade and hyperon puzzles of compact star interiors

    CERN Document Server

    Blaschke, David

    2016-01-01

    We aim at contributing to the resolution of three of the fundamental puzzles related to the still unsolved problem of the structure of the dense core of compact stars (CS): (i) the hyperon puzzle: how to reconcile pulsar masses of $2\\,$M$_\\odot$ with the hyperon softening of the equation of state (EoS); (ii) the masquerade problem: modern EoS for cold, high density hadronic and quark matter are almost identical; and (iii) the reconfinement puzzle: what to do when after a deconfinement transition the hadronic EoS becomes favorable again? We show that taking into account the compositeness of baryons (by excluded volume and/or quark Pauli blocking) on the hadronic side and confining and stiffening effects on the quark matter side results in an early phase transition to quark matter with sufficient stiffening at high densities which removes all three present-day puzzles of CS interiors. Moreover, in this new class of EoS for hybrid CS falls the interesting case of a strong first order phase transition which resul...

  19. High-mass twins & resolution of the reconfinement, masquerade and hyperon puzzles of compact star interiors

    Science.gov (United States)

    Blaschke, David; Alvarez-Castillo, David E.

    2016-01-01

    We aim at contributing to the resolution of three of the fundamental puzzles related to the still unsolved problem of the structure of the dense core of compact stars (CS): (i) the hyperon puzzle: how to reconcile pulsar masses of 2 M⊙ with the hyperon softening of the equation of state (EoS); (ii) the masquerade problem: modern EoS for cold, high density hadronic and quark matter are almost identical; and (iii) the reconfinement puzzle: what to do when after a deconfinement transition the hadronic EoS becomes favorable again? We show that taking into account the compositeness of baryons (by excluded volume and/or quark Pauli blocking) on the hadronic side and confining and stiffening effects on the quark matter side results in an early phase transition to quark matter with sufficient stiffening at high densities which removes all three present-day puzzles of CS interiors. Moreover, in this new class of EoS for hybrid CS falls the interesting case of a strong first order phase transition which results in the observable high mass twin star phenomenon, an astrophysical observation of a critical endpoint in the QCD phase diagram.

  20. High-mass twins & resolution of the reconfinement, masquerade and hyperon puzzles of compact star interiors

    International Nuclear Information System (INIS)

    We aim at contributing to the resolution of three of the fundamental puzzles related to the still unsolved problem of the structure of the dense core of compact stars (CS): (i) the hyperon puzzle: how to reconcile pulsar masses of 2 M⊙ with the hyperon softening of the equation of state (EoS); (ii) the masquerade problem: modern EoS for cold, high density hadronic and quark matter are almost identical; and (iii) the reconfinement puzzle: what to do when after a deconfinement transition the hadronic EoS becomes favorable again? We show that taking into account the compositeness of baryons (by excluded volume and/or quark Pauli blocking) on the hadronic side and confining and stiffening effects on the quark matter side results in an early phase transition to quark matter with sufficient stiffening at high densities which removes all three present-day puzzles of CS interiors. Moreover, in this new class of EoS for hybrid CS falls the interesting case of a strong first order phase transition which results in the observable high mass twin star phenomenon, an astrophysical observation of a critical endpoint in the QCD phase diagram

  1. Travoprost Induced Granulomatous Anterior Uveitis

    OpenAIRE

    Patrick Chiam

    2011-01-01

    Purpose. To report a case of granulomatous anterior uveitis caused by travoprost. Methods. Single observational case report. Results. A 71-year-old who was fit and healthy presented with bilateral granulomatous anterior uveitis 2 months after he was started on travoprost in both eyes. There was no past history of uveitis. Blood test and radiological investigation were unremarkable. Travoprost was stopped. The uveitis resolved on topical steroid treatment. A rechallenge with travoprost was att...

  2. Update on anterior ankle impingement

    OpenAIRE

    Vaseenon, Tanawat; Amendola, Annunziato

    2012-01-01

    Anterior ankle impingement results from an impingement of the ankle joint by a soft tissue or osteophyte formation at the anterior aspect of the distal tibia and talar neck. It often occurs secondary to direct trauma (impaction force) or repetitive ankle dorsiflexion (repetitive impaction and traction force). Chronic ankle pain, swelling, and limitation of ankle dorsiflexion are common complaints. Imaging is valuable for diagnosis of the bony impingement but not for the soft tissue impingemen...

  3. Heat Transfer and Friction Characteristics of the Microfluidic Heat Sink with Variously-Shaped Ribs for Chip Cooling

    OpenAIRE

    Gui-Lian Wang; Da-Wei Yang; Yan Wang; Di Niu; Xiao-Lin Zhao; Gui-Fu Ding

    2015-01-01

    This paper experimentally and numerically investigated the heat transfer and friction characteristics of microfluidic heat sinks with variously-shaped micro-ribs, i.e., rectangular, triangular and semicircular ribs. The micro-ribs were fabricated on the sidewalls of microfluidic channels by a surface-micromachining micro-electro-mechanical system (MEMS) process and used as turbulators to improve the heat transfer rate of the microfluidic heat sink. The results indicate that the utilizing of m...

  4. Anterior chamber depth during hemodialysis

    Directory of Open Access Journals (Sweden)

    Gracitelli CPB

    2013-08-01

    Full Text Available Carolina Pelegrini Barbosa Gracitelli,1 Francisco Rosa Stefanini,1 Fernando Penha,1 Miguel Ângelo Góes,2 Sérgio Antonio Draibe,2 Maria Eugênia Canziani,2 Augusto Paranhos Junior1 1Ophthalmology Department, 2Division of Nephrology, Federal University of São Paulo – UNIFESP, São Paulo, Brazil Background: Exacerbation of chronic glaucoma or acute glaucoma is occasionally observed in patients undergoing hemodialysis (HD because of anterior chamber depth changes during this therapy. Purpose: To evaluate anterior chamber depth and axial length in patients during HD sessions. Methods: A total of 67 eyes of 35 patients were prospectively enrolled. Axial length and anterior chamber depth were measured using ultrasonic biometry, and these measures were evaluated at three different times during HD sessions. Body weight and blood pressure pre- and post-HD were also measured. Results: There was no difference in the axial length between the three measurements (P = 0.241. We observed a significantly decreased anterior chamber depth (P = 0.002 during HD sessions. Conclusion: Our results support the idea that there is a change in anterior chamber depth in HD sessions. Keywords: anterior chamber, hemodialysis, axial length, acute angle-closure glaucoma

  5. Heat transfer in a two-pass internally ribbed turbine blade coolant channel with cylindrical vortex generators

    Energy Technology Data Exchange (ETDEWEB)

    Hibbs, R.; Chen, Y.; Nikitopoulos, D. [Louisiana State Univ., Baton Rouge, LA (United States)] [and others

    1995-10-01

    The effect of vortex generators on the mass (heat) transfer from the ribbed passage of a two pass turbine blade coolant channel is investigated with the intent of optimizing the vortex generator geometry so that significant enhancements in mass/heat transfer can be achieved. In the experimental configuration considered, ribs are mounted on two opposite walls; all four walls along each pass are active and have mass transfer from their surfaces but the ribs are non-participating. Mass transfer measurements, in the form of Sherwood number ratios, are made along the centerline and in selected inter-rib modules. Results are presented for Reynolds number in the range of 5,000 to 40,000, pitch to rib height ratios of 10.5 and 21, and vortex generator-rib spacing to rib height ratios of 0.55, and 1.5. Centerline and spanwise averaged Sherwood number ratios are presented along with contours of the Sherwood number ratios. Results indicate that the vortex generators induce substantial increases in the local mass transfer rates, particularly along the side walls, and modest increases in the average mass transfer rates. The vortex generators have the effect of making the inter-rib profiles along the ribbed walls more uniform. Along the side walls, horse-shoe vortices that characterize the vortex generator wake are associated with significant mass transfer enhancements. The wake effects and the levels of enhancement decrease somewhat with increasing Reynolds number and decreasing pitch.

  6. Evaluating the Relationship between Rib Fractures and the Probability of Abdominal Trauma; a Brief Report

    Directory of Open Access Journals (Sweden)

    Vahid Monsef Kasmaei

    2015-02-01

    Full Text Available Introduction: Trauma is one of the most important causes of death in patients under 40 years of age and the third common cause of death regardless of age. Rib cage damages are one of the major reasons for death in the early minutes post-trauma. Therefore, the present study aimed to evaluate the frequency of intra-abdominal injury in the patients with rib fracture who were referred to emergency department. Methods: This cross-sectional study included 60 patients with rib fractures who were admitted to the emergency department of Poorsina Hospital, Rasht, Iran, from March 2011 to March2012. A checklist was filled out for all the patients including age, sex, trauma mechanism, side and site of fracture, the number of broken ribs, the results of abdominal ultrasonography, the need for laparotomy and mortality. The collected data were classified based on descriptive statistics and analyzed using SPSS 16. Results: 60 patients with the mean age of 47.26±13.71 years were admitted to the emergency department during this time (81.7% male. The most common mechanism of trauma was car accident [22(36.7%]. Among these 60 patients, 71 rib fractures in 3 levels of chest (upper, middle, lower were detected and 50 (83.3% in the same area. Mean number of fractured ribs was 2.85±2.2 (minimum: 1, maximum 10. In 3 (5% patients, fracture was on both sides. The results of abdominal ultrasonography in 7 (11.7% patients were positive. The number of fractured ribs (p=0.017 and the area of the fracture (p=0.048 showed a significant correlation with the presence of intra-abdominal free fluid. The fracture of more than 2 ribs directly correlated with the possibility of intra-abdominal hemorrhage (p<0.0001. Conclusion: Based on the results of this study, it seems that the number and area of the fractured ribs directly and significantly correlate with the probability of abdominal trauma based on the results of abdominal ultrasonography.

  7. Sand transport in a two pass internal cooling duct with rib turbulators

    International Nuclear Information System (INIS)

    Highlights: • Highest particle impingement observed in the bend and first quarter of 2nd pass. • Average particle impingement per pitch is 28% higher in the second pass. • Rib faces are by far the most susceptible to particle impingement. • Particle impingement is sensitive to particle size. • Particle impingement is sensitive to wall collision model used. - Abstract: Jet engines often operate under dirty conditions where large amounts of particulate matter can be ingested, especially, sand, ash and dirt. Particulate matter in different engine components can lead to degradation in performance. The focus of this study is to investigate the sand transport and deposition in the internal cooling passages of turbine blades. A two pass stationary square duct with rib turbulators subjected to sand ingestion is studied using Large Eddy Simulations (LES). Each pass has ribs on two opposite walls and aligned normal to the main flow direction. The rib pitch to rib height (P/e) is 9.28, the rib height to channel hydraulic diameter (e/Dh) is 0.0625 and calculations have been carried out for a bulk Reynolds number of 25,000. Particle sizes in the range 0.5–25 μm are considered, with the same size distribution as found in Arizona Road Dust (medium). Large Eddy Simulation (LES) with a wall-model is used to model the flow and sand particles are modeled using a discrete Lagrangian framework. Results quantify the distribution of particle impingement density on all surfaces. Highest particle impingement density is found in the first quarter section of the second pass after the 180° turn, where the recorded impingement is more than twice that of any other region. It is also found that the average particle impingement per pitch is 28% higher in the second pass than the first pass. Results show lower particle tendency to impact the region immediately behind the rib in the first pass compared to the second pass where particle impingement is more uniform in the region between

  8. IGRT/ART phantom with programmable independent rib cage and tumor motion

    Energy Technology Data Exchange (ETDEWEB)

    Haas, Olivier C. L., E-mail: o.haas@coventry.ac.uk [Control Theory and Applications Centre, Coventry University, Coventry CV1 2TL (United Kingdom); Mills, John A.; Land, Imke; Mulholl, Pete; Menary, Paul; Crichton, Robert; Wilson, Adrian; Sage, John [Department of Clinical Physics and Bioengineering, University Hospital, Coventry CV2 2DX (United Kingdom); Anna, Morenc [University Hospitals of Leicester NHS Trust, Leicester Royal Infirmary, Leicester, LE1 5WW (United Kingdom); Depuydt, Tom [Radiotherapy, Medical Physics Group, University Hospital UZ Brussel, Laarbeeklaan 101 - 1090 Brussels (Belgium)

    2014-02-15

    Purpose: This paper describes the design and experimental evaluation of the Methods and Advanced Equipment for Simulation and Treatment in Radiation Oncology (MAESTRO) thorax phantom, a new anthropomorphic moving ribcage combined with a 3D tumor positioning system to move target inserts within static lungs. Methods: The new rib cage design is described and its motion is evaluated using Vicon Nexus, a commercial 3D motion tracking system. CT studies at inhale and exhale position are used to study the effect of rib motion and tissue equivalence. Results: The 3D target positioning system and the rib cage have millimetre accuracy. Each axis of motion can reproduce given trajectories from files or individually programmed sinusoidal motion in terms of amplitude, period, and phase shift. The maximum rib motion ranges from 7 to 20 mm SI and from 0.3 to 3.7 mm AP with LR motion less than 1 mm. The repeatability between cycles is within 0.16 mm root mean square error. The agreement between CT electron and mass density for skin, ribcage, spine hard and inner bone as well as cartilage is within 3%. Conclusions: The MAESTRO phantom is a useful research tool that produces programmable 3D rib motions which can be synchronized with 3D internal target motion. The easily accessible static lungs enable the use of a wide range of inserts or can be filled with lung tissue equivalent and deformed using the target motion system.

  9. Onlay Rib Bone Graft in Elevation of Reconstructed Auricle: 17 Years of Experience

    Directory of Open Access Journals (Sweden)

    Taehoon Kim

    2013-05-01

    Full Text Available Background  A cartilage wedge block and covering flap are standard procedures for firmelevation of the ear in microtia correction. However, using costal cartilage for elevation ofthe reconstructed auricle can be insufficient, and the fixed cartilage wedge block may beabsorbed or may slip out. Furthermore, elevating covering flaps is time-consuming and usesup fascia, a potential source of reconstruction material. Therefore, we propose an innovativemethod using autologous onlay rib bone graftfor auricular elevation ofmicrotia.Methods  From February 1995 to August 2012, 77 patients received a first stage operationwith a rib cartilage framework graft. In the second stage operation, a small full thickness ofrib bone was harvested through the previous donor scar. The bihalved rib bone was insertedinto the subperiosteal pocket beneath the cartilage framework.Results  The follow-up time ranged from 1 month to 17 years, with a mean of 3 years. Allof the patients sustained the elevation of their ears very well during the follow-up period.Donorsite problems, exceptfor hypertrophic scars,were not observed. Surgery-related complications,specifically skin necrosis, infection, or hematoma, occurred in 4 cases.Conclusions  Onlay rib bone graft used to elevate the reconstructed auricle is a more anatomically appropriate materialthan cartilage, due to the bone-to-bone contact between thebone graft and the temporal bone. Postoperative minor correction of the elevation degree isstraightforward and the skin graft survives better. Therefore, reconstructed auricle elevationusing onlay rib bone graftis a useful and valuablemethod.

  10. Combined effects of rotation and rib-roughness - a dns study of turbulent channel flow

    Science.gov (United States)

    Andersson, Helge I.; Narasimhamurthy, Vagesh D.

    2014-11-01

    The combined effects of system rotation and rib-roughness on turbulent channel flow have been investigated by means of direct numerical simulations. Square ribs were placed on both walls in a non-staggered arrangement and the channel was subjected to steady rotation about a spanwise axis for a series of rotation numbers up to Ro = 24. A pressure-loss reduction of about 20 per cent resulted from the imposed rotation at Ro = 6. In spite of the 10 per cent blockage due to the wall-mounted ribs, the flow field exhibited statistical streamwise homogeneity in the core region. The mean velocity varied linearly with a slope such that the mean fluid rotation exactly outweighed the imposed system rotation. The flow field in the vicinity of the ribs was affected differently at the two sides of the rotating channel. The separated flow region behind the ribs on the anti-cyclonic pressure side shrinked with increasing Ro due to the enhanced turbulent mixing caused by the Coriolis force. The original d-type roughness was thus turned into a k-type roughness.

  11. Stress fractures of the ribs in elite competitive rowers: a report of nine cases

    International Nuclear Information System (INIS)

    The objective was to report the clinical and imaging patterns of nine cases of stress fractures of the rib diagnosed in Italian Olympic rowers. Nine patients with stress fractures of the rib detected from 103 (8.7%) Italian team rowers competing between May 2000 and May 2006 were identified based on the database of a sports medicine institute. All athletes were male. They were aged between 17 and 31 years (mean: 24.4). Patient weight, fracture location, rowing side and imaging methods employed were noted. The diagnosis was made based on history, clinical examination and Tc-99m MDP bone scintigraphy. Eight of the 9 fractures were located anterolaterally between the fourth and ninth rib. In 1 of the 5 athletes with standard radiographs, a fracture line was visible and in 4 there was callus formation. In 2 athletes sonography was performed, which detected discontinuity of the rib surface and callus formation (1 case each). Stress fractures of the ribs are relatively common in competitive rowers. They are characterized by increasing lateral chest pain and typical scintigraphic, radiographic and sonographic findings. (orig.)

  12. Percutaneous radiofrequency ablation for lung tumors beneath the rib under CT fluoroscopic guidance with gantry tilt

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Takanobu; Yamagami, Takuji; Tanaka, Osamu; Yoshimatsu, Rika; Miura, Hiroshi; Nishimura, Tsunehiko (Dept. of Radiology, Graduate School of Medical Science, Kyoto Prefectural Univ. of Medicine, Kamigyo, Kyoto (Japan)), e-mail: yamagami@koto.kpu-m.ac.jp

    2010-05-15

    Background: Radiofrequency (RF) ablation of lung tumors has become a treatment of choice, especially for unresectable cases. However, RF ablation of small lung lesions located just beneath the rib is difficult. Purpose: To evaluate the efficacy and safety of gantry tilting for the performance of RF ablation of peripheral lesions located beneath the rib. Material and Methods: Our study was based on 18 of 293 lesions in the lung for which RF ablation was performed under CT scan fluoroscopic guidance at our institution between October 2004 and March 2009. For these 18 lesions, RF ablation was performed with gantry tilting because a rib blocked visualization of the RF ablation route even after other attempts had been made to change the relationship between the target and the rib. Results: All RF needles, with only one exception, were successfully advanced to hit the tumor. The commonest complication was a pneumothorax, which occurred in seven procedures. No serious complications occurred. The progression-free rates were 82.4% at 6 months, 62.5% at 12 months, and 30% at 24 months. Mean local progression-free duration was 17.6+-11.6 months (range 4-36 months). Conclusion: RF ablation under CT scan fluoroscopic guidance with gantry tilt is a useful and safe technique for RF ablation of lung nodules located beneath the rib

  13. Stress fractures of the ribs in elite competitive rowers: a report of nine cases

    Energy Technology Data Exchange (ETDEWEB)

    Dragoni, S. [Institute of Sport Medicine and Science of the Italian Olympic Committee, Department of Radiology, Rome (Italy); Giombini, A.; Ripani, M. [University of Motor Sciences, Department of Health, Rome (Italy); Di Cesare, A. [University of Rome ' ' La Sapienza' ' , Department of Physical Medicine and Rehabilitation, Rome (Italy); Magliani, G. [Medical Department of the Italian State Police, Rome (Italy)

    2007-10-15

    The objective was to report the clinical and imaging patterns of nine cases of stress fractures of the rib diagnosed in Italian Olympic rowers. Nine patients with stress fractures of the rib detected from 103 (8.7%) Italian team rowers competing between May 2000 and May 2006 were identified based on the database of a sports medicine institute. All athletes were male. They were aged between 17 and 31 years (mean: 24.4). Patient weight, fracture location, rowing side and imaging methods employed were noted. The diagnosis was made based on history, clinical examination and Tc-99m MDP bone scintigraphy. Eight of the 9 fractures were located anterolaterally between the fourth and ninth rib. In 1 of the 5 athletes with standard radiographs, a fracture line was visible and in 4 there was callus formation. In 2 athletes sonography was performed, which detected discontinuity of the rib surface and callus formation (1 case each). Stress fractures of the ribs are relatively common in competitive rowers. They are characterized by increasing lateral chest pain and typical scintigraphic, radiographic and sonographic findings. (orig.)

  14. First-rib stress fracture in two adolescent swimmers: a case report.

    Science.gov (United States)

    Low, Sara; Kern, Michael; Atanda, Alfred

    2016-07-01

    First-rib stress fractures have been described in adolescent athletes in various sports, with only one prior case report of first-rib stress fractures in an adolescent female swimmer. There is a need for research on the cause, management, and prevention of these injuries as they lead to significant morbidity and critical time away from sport for these aspiring athletes. We aimed to describe first-rib stress fractures as a potential cause for non-specific atraumatic chronic shoulder pain in adolescent swimmers and to discuss the different presentations, unique risk factors, treatment, and potential injury prevention strategies of such fractures. We discussed two such cases which were successfully treated with activity modification with restriction of all overhead activity, gradually progressive physical therapy and a return to swimming protocol. First-rib stress fractures can vary in presentation and should be in the differential diagnosis in adolescent swimmers with chronic shoulder pain. These injuries can be successfully managed with rest from overhead activities and physical therapy. Gradual return to competitive swimming can be achieved even with non-union of a first-rib stress fracture. Emphasis on balanced strength training in different muscle groups and proper swimming technique is essential to prevent these injuries. PMID:26539736

  15. Optimization of the Interconnect Ribs for a Cathode-Supported Solid Oxide Fuel Cell

    Directory of Open Access Journals (Sweden)

    Wei Kong

    2014-01-01

    Full Text Available A comprehensive mathematical model of the performance of the cathode-supported solid oxide fuel cell (SOFC with syngas fuel is presented. The model couples the intricate interdependency between the ionic conduction, electronic conduction, gas transport, the electrochemical reaction processes in the functional layers and on the electrode/electrolyte interfaces, methane steam reforming (MSR and the water gas shift reaction (WGSR. The validity of the mathematical model is demonstrated by the excellent agreement between the numerical and experimental I-V curves. The effect of anode rib width and cathode rib width on gas diffusion and cell performance is examined. The results show conclusively that the cell performance is strongly influenced by the rib width. Furthermore, the anode optimal rib width is smaller than that for cathode, which is contrary to anode-supported SOFC. Finally, the formulae for the anode and cathode optimal rib width are given, which provide an easy to use guidance for the broad SOFC engineering community.

  16. Glued Joint Behavior of Ribs for Wood-Based Composite Plates

    Science.gov (United States)

    Frolovs, G.; Rocens, K.; Sliseris, J.

    2015-11-01

    This article presents experimental investigations of composite sandwich plywood plates with cell type core and their connections between skin layers of birch plywood and a core of straight and curved plywood honeycomb-type ribs. This shape of core ribs provides several improvements for these plates in the manufacturing process as well as improves the mechanical properties of plywood plates. This specific form of ribs allows simplifying the manufacturing of these plates although it should be detailed and improved. The most typical cases (series of specimens) were compared to the results obtained from FEM (ANSYS) simulations. All thicknesses of elements are chosen according to plywood supplier assortment. Standard birch plywood (Riga Ply) plates were used - three layer plywood was chosen for skin elements (Surfaces) and three or five layer plywood was chosen for edge elements. Different bond pressures were taken to compare their influence on joint strength and stiffness.

  17. Instrumental neutron activation analysis of rib bone samples and of bone reference materials

    International Nuclear Information System (INIS)

    The instrumental neutron activation analysis method was used for the determination of trace elements in rib bone samples taken from autopsies of accident victims. The elements Br, Ca, Cl, Cr, Fe, Mg, Mn, Na, P, Sr, Rb and Zn were determined in cortical tissues by using short and long irradiations with thermal neutron flux of the IEA-R1m nuclear reactor. The reference materials NIST SRM 1400 Bone Ash and NIST SRM 1486 Bone Meal were also analyzed in order to evaluate the precision and the accuracy of the results. It was verified that lyophilization is the most convenient process for drying bone samples since it does not cause any element losses. Comparisons were made between the results obtained for rib samples and the literature values as well as between the results obtained for different ribs from a single individual and for bones from different individuals. (author)

  18. Blunt liver injury with intact ribs under impacts on the abdomen: a biomechanical investigation.

    Directory of Open Access Journals (Sweden)

    Yu Shao

    Full Text Available Abdominal trauma accounts for nearly 20% of all severe traffic injuries and can often result from intentional physical violence, from which blunt liver injury is regarded as the most common result and is associated with a high mortality rate. Liver injury may be caused by a direct impact with a certain velocity and energy on the abdomen, which may result in a lacerated liver by penetration of fractured ribs. However, liver ruptures without rib cage fractures were found in autopsies in a series of cases. All the victims sustained punches on the abdomen by fist. Many studies have been dedicated to determining the mechanism underlying hepatic injury following abdominal trauma, but most have been empirical. The actual process and biomechanism of liver injury induced by blunt impact on the abdomen, especially with intact ribs remained, are still inexhaustive. In order to investigate this, finite element methods and numerical simulation technology were used. A finite element human torso model was developed from high resolution CT data. The model consists of geometrically-detailed liver and rib cage models and simplified models of soft tissues, thoracic and abdominal organs. Then, the torso model was used in simulations in which the right hypochondrium was punched by a fist from the frontal, lateral, and rear directions, and in each direction with several impact velocities. Overall, the results showed that liver rupture was primarily caused by a direct strike of the ribs induced by blunt impact to the abdomen. Among three impact directions, a lateral impact was most likely to cause liver injury with a minimum punch speed of 5 m/s (the momentum was about 2.447 kg.m/s. Liver injuries could occur in isolation and were not accompanied by rib fractures due to different material characteristics and injury tolerance.

  19. Cough induced rib fracture, rupture of the diaphragm and abdominal herniation

    Directory of Open Access Journals (Sweden)

    Wurl Peter

    2006-11-01

    Full Text Available Abstract Cough can be associated with many complications. In this article, we present a 59 year old male patient with a very rare combination of a cough related stress fracture of the ninth rib, a traumatic rupture of the diaphragm, and an abdominal wall herniation. The hernia was repaired through surgical treatment without bowel resection, the diaphragm and the internal and oblique abdominal muscle were adapted, and the abdomen was reinforced with a prolene net. Although each individual injury is well documented in the literature, the combination of rib fracture, abdominal herniation and diaphragm rupture has not been reported.

  20. Scintigraphic diagnosis of sport injuries: Multiple fractures of ribs by golf-players

    International Nuclear Information System (INIS)

    Three untrained golf-players suffered from pain in the dorsal region of the left thorax after some training hours. Three to four weeks after the pains had begun serial fractures of ribs were diagnosed by sup(99m)Tc-MDP bonescan-examinations. All fractures were localized near the costal angulus (paravertebral) of these ribs. The fractures are caused by manual tensions. The difficulties in timing the bone-scan and in identifying the morphologic substrate are demonstrated. It is recommended, that golf-players suffering from thoracic pain ought to be examined by bone scan. (orig.)

  1. Turbulent flow in rib-roughened channel under the effect of Coriolis and rotational buoyancy forces

    OpenAIRE

    Coletti, Filippo; Lo Jacono, David; Cresci, Irene; Arts, Tony

    2014-01-01

    The turbulent flow inside a rotating channel provided with transverse ribs along one wall is studied by means of two-dimensional time-resolved particle image ve- locimetry. The measurement set-up is mounted on the same rotating disk with the test section, allowing to obtain the same accuracy and resolution as in a non-rotating rig. The Reynolds number is 15 000, and the rotation number is 0.38. As the ribbed wall is heated, both the Coriolis force and the centrifugal force play a role in the ...

  2. Thoracic Outlet Syndrome Caused by Hydatid Cyst of the First Rib-Rare But Important

    OpenAIRE

    Levy Faber, Dan; Best, Lael-Anson; Militianu, Daniela; Ben Nun, Alon

    2010-01-01

    Hydatid cysts are usually located in the liver and lungs. Skeletal echinococcosis is relatively rare and that of the rib is exceptional. Less than 50 cases of costal echinococcosis have been reported in the literature so far. To our knowledge, only one case report of thoracic outlet syndrome due to echinococcal cyst in the first rib was described in 1995. Accurate pre-operative diagnosis is important but may be challenging in some cases. Reported here is a case of echinococcosis of the first ...

  3. Numerical investigation of turbulent flow and heat transfer in channel with ribs

    DEFF Research Database (Denmark)

    Myllerup, Lisbeth; Larsen, Poul Scheel

    The performance of three different low-Reynolds number turbulence models has been explored for the benchmark test of fully developed (periodic) flow in a ribbed plane channel. Results are presented for two values of the Reynolds number (based on mean velocity and hydraulic diameter), Re = 37,200 ......,200 and Re = 12,600, for which experimental data are available for the flow field and heat transfer, respectively. Comparison with experimental data includes the Nusselt number distribution along ribbed surface and profiles of mean velocity....

  4. Travoprost Induced Granulomatous Anterior Uveitis

    Science.gov (United States)

    Chiam, Patrick

    2011-01-01

    Purpose. To report a case of granulomatous anterior uveitis caused by travoprost. Methods. Single observational case report. Results. A 71-year-old who was fit and healthy presented with bilateral granulomatous anterior uveitis 2 months after he was started on travoprost in both eyes. There was no past history of uveitis. Blood test and radiological investigation were unremarkable. Travoprost was stopped. The uveitis resolved on topical steroid treatment. A rechallenge with travoprost was attempted in one eye. The inflammation recurred in this eye only. This subsided with the cessation of travoprost alone without topical steroid. Conclusion. This is the first case report of travoprost causing granulomatous anterior uveitis. The uveitis recurred with a rechallenge. Changing the prostaglandin analogue to another topical treatment may be adequate to cease the inflammation. PMID:22606464

  5. The Vault with Curvilinear Ribs in the "Hall of Arms" in the Albrechtsburg Meissen: Studies on the Concept, Design and Construction of a Complex Late Gothic Rib Vault

    OpenAIRE

    Wendland, David; Aranda Alonso, María; Kobe, Alexander

    2015-01-01

    The current state of research on the design and construction of late Gothic vaults is principally based on the interpretation of sources, but rarely on surveys of existing vaults. In particular the idea for the criteria upon which the radii of the single ribs and arches were determined (so-called "principal arch"), is found to derive from sources dating from later periods when Gothic vaulting was no longer generally practised. In fact, this interpretation cannot be supported by geometric surv...

  6. Primary hepatocellular carcinoma in ectopic liver masquerading as left adrenal carcinoma: a rare occurrence

    Directory of Open Access Journals (Sweden)

    Shailendra Kumar

    2010-06-01

    Full Text Available We report a unique case of primary hepatocellular carcinoma in an ectopic liver rest in the left renal hilum masquerading as a left adrenal tumor. Adrenal tumors have been reported within adrenal rests inside the liver but hepatocellular carcinoma in ectopic liver rests in the adrenal area is an extremely rare entity. To the best of our knowledge, this is the first case report from the Indian subcontinent to describe this event in the English literature. Our patient, a sixty-year-old, non-diabetic, non-hypertensive male, presented with a history of left flank pain for the past six months. He was a chronic smoker and also consumed excessive amounts of alcohol. He had chronic obstructive pulmonary disease and was hepatitis B surface antigen positive. A contrast enhanced computer tomography scan of the abdomen showed an 8¥8¥8 cm, well-defined, heterogeneously enhancing mass with central necrosis, in the left suprarenal region. The provisional diagnosis of an adrenal tumor was made and open transperitoneal excision of the tumor along with two enlarged lymph nodes was done. Immunohistochemistry staining of the specimen revealed it to be a primary hepatocellular carcinoma. The patient died within six months of surgery owing to extensive metastases. We concluded that chronic hepatitis B infection and chronic and excessive alcohol consumption and/or chronic smoking may have been the predisposing factors for the occurrence of primary hepatocellular carcinoma in the liver rest in our patient. The prognosis appears to be poor despite surgical management.

  7. The riboflavin transporter RibU in Lactococcus lactis : Molecular characterization of gene expression and the transport mechanism

    NARCIS (Netherlands)

    Burgess, CM; Slotboom, DJ; Geertsma, ER; Duurkens, Hinderika; Poolman, B; van Sinderen, D

    2006-01-01

    This study describes the characterization of the riboflavin transport protein RibU in the lactic acid bacterium Lactococcus lactis subsp. cremoris NZ9000. RibU is predicted to contain five membrane-spanning segments and is a member of a novel transport protein family, not described in the Transport

  8. Performance of Ar+-milled Ti:Sapphire rib waveguides as single transverse mode broadband fluorescence sources

    NARCIS (Netherlands)

    Grivas, C.; Shepherd, D.P.; May-Smith, T.C.; Eason, R.W.; Pollnau, M.; Crunteanu, A.; Jelinek, M.

    2003-01-01

    Rib waveguides have been fabricated in pulsed-laser-deposited Ti:sapphire layers using photolithographic patterning and subsequent Ar+-beam milling. Fluorescence output powers up to 300 W have been observed from the ribs following excitation by a 3-W multiline argon laser. Mode intensity profiles sh

  9. Rib fracture after stereotactic radiotherapy for primary lung cancer: prevalence, degree of clinical symptoms, and risk factors

    International Nuclear Information System (INIS)

    As stereotactic body radiotherapy (SBRT) is a highly dose-dense radiotherapy, adverse events of neighboring normal tissues are a major concern. This study thus aimed to clarify the frequency and degree of clinical symptoms in patients with rib fractures after SBRT for primary lung cancer and to reveal risk factors for rib fracture. Appropriate α/β ratios for discriminating between fracture and non-fracture groups were also investigated. Between November 2001 and April 2009, 177 patients who had undergone SBRT were evaluated for clinical symptoms and underwent follow-up thin-section computed tomography (CT). The time of rib fracture appearance was also assessed. Cox proportional hazard modeling was performed to identify risk factors for rib fracture, using independent variables of age, sex, maximum tumor diameter, radiotherapeutic method and tumor-chest wall distance. Dosimetric details were analyzed for 26 patients with and 22 randomly-sampled patients without rib fracture. Biologically effective dose (BED) was calculated with a range of α/β ratios (1–10 Gy). Receiver operating characteristics analysis was used to define the most appropriate α/β ratio. Rib fracture was found on follow-up thin-section CT in 41 patients. The frequency of chest wall pain in patients with rib fracture was 34.1% (14/41), and was classified as Grade 1 or 2. Significant risk factors for rib fracture were smaller tumor-chest wall distance and female sex. Area under the curve was maximal for BED at an α/β ratio of 8 Gy. Rib fracture is frequently seen on CT after SBRT for lung cancer. Small tumor-chest wall distance and female sex are risk factors for rib fracture. However, clinical symptoms are infrequent and generally mild. When using BED analysis, an α/β ratio of 8 Gy appears most effective for discriminating between fracture and non-fracture patients

  10. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... during a hip replacement through the anterior supine intramuscular approach. “OR-Live,” the vision of improving health. ... the approach are operating through an internervous and intramuscular anatomic interval. It’s not necessary to detach any ...

  11. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... got coming out in “JBJS,” the early six-week recovery is dramatically different between a direct lateral abductor splitting approach and this anterior supine approach. Let me get this head on. My experience, these patients have full leg control in about 24 hours. Yeah. They can get out of bed and ...

  12. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... the anterior supine intramuscular approach. “OR-Live,” the vision of improving health. Good evening and welcome to ... should know that this is done under direct vision. Yeah. You are seeing everything you’re doing. ...

  13. Numerical investigation of turbulent flow and heat transfer in channel with ribs

    DEFF Research Database (Denmark)

    Myllerup, Lisbeth; Larsen, Poul Scheel

    1999-01-01

    The performance of three different low-Reynolds number turbulence models has been explored for the benchmark test of fully developed (periodic) flow in a ribbed plane channel. Results are presented for two values of the Reynolds number (based on mean velocity and hydraulic diameter), Re = 37...

  14. Stable level and phase control circuits for high power VHF transmitters for RIB applications

    International Nuclear Information System (INIS)

    For most applications it is required that the output power level and insertion phase of a high power transmitter remain unchanged against ambient temperature variation and power supply fluctuations. Design schemes for a stable level controller and a phase controller for use in a VHF transmitter that has been indigenously developed for RIB application at VECC is presented in this paper. (author)

  15. 30 CFR 57.3460 - Maintenance between machinery or equipment and ribs.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Maintenance between machinery or equipment and... NONMETAL MINES Ground Control Precautions-Underground Only § 57.3460 Maintenance between machinery or equipment and ribs. Persons shall not perform maintenance work between machinery or equipment and...

  16. Ovariectomy-induced changes in aged beagles: Histomorphometry and mineral content of the rib

    Energy Technology Data Exchange (ETDEWEB)

    Wilson, A.K.; Bhattacharyya, M.H.; Hurst, D. [Argonne National Lab., IL (United States). Center for Mechanistic Biology and Biotechnology; Miller, S. [Univ. of Utah, Salt Lake City, UT (United States). Radiobiology Div.; Sacco-Gibson, N. [Proctor and Gamble Pharmaceuticals, Cincinnati, OH (United States)

    1997-08-01

    The effects of ovariectomy on the aged beagle skeleton were studied by histomorphometric analysis of the cortical bone in sequential rib biopsies. Biopsies were taken from each ovariectomized (OV) or sham-operated (SO) dog at the time of surgery and at 1, 4, and 8.5 months after surgery. Tetracycline, calcein, and xylenol orange, respectively, were administered by a fluorochrome labeling procedure (2d-10d-2d) just prior to each postoperative biopsy to provide markers of bone formation. Analysis of sequential biopsies provided a means to follow the response to ovariectomy over time and compare each animal against its own baseline. Examination of sequential biopsies indicated that cortical porosity increased by the fourth month after ovariectomy and remained high at 8.5 months. Ovariectomy did not influence histomorphometric indices at one month after surgery, but substantial differences were observed at later times. Ovariectomy stimulated a transient increase in bone formation and was increased six-fold over that of SO dogs at four months. Ribs were also analyzed for mineral content at necropsy. The rib was heterogeneous along its length for calcium content and concentration. In the midrib where biopsies for histomorphometric analysis were taken, ovariectomy induced a decrease in mass and mineral content; total calcium was decreased by approximately 31%. These data demonstrate that the rib cortical bone is a responsive site for the effects of ovariectomy in female dogs.

  17. Flavin binding to the high affinity riboflavin transporter RibU

    NARCIS (Netherlands)

    Duurkens, Hinderika; Tol, Menno B.; Geertsma, Eric R.; Permentier, Hjalmar P.; Slotboom, Dirk Jan

    2007-01-01

    The first biochemical and spectroscopic characterization of a purified membrane transporter for riboflavin ( vitamin B-2) is presented. The riboflavin transporter RibU from the bacterium Lactococcus lactis was overexpressed, solubilized, and purified. The purified transporter was bright yellow when

  18. Effect of rib cage and abdominal restriction on total respiratory resistance and reactance.

    Science.gov (United States)

    van Noord, J A; Demedts, M; Clément, J; Cauberghs, M; Van de Woestijne, K P

    1986-11-01

    In 14 healthy male subjects we studied the effects of rib cage and abdominal strapping on lung volumes, airway resistance (Raw), and total respiratory resistance (Rrs) and reactance (Xrs). Rib cage, as well as abdominal, strapping caused a significant decrease in vital capacity (respectively, -36 and -34%), total lung capacity (TLC) (-31 and -27%), functional residual capacity (FRC) (-28 and -28%), and expiratory reserve volume (-40 and -48%) and an increase in specific airway conductance (+24 and +30%) and in maximal expiratory flow at 50% of control TLC (+47 and +42%). The decrease of residual volume (RV) was significant (-12%) with rib cage strapping only. Abdominal strapping resulted in a minor overall increase in Rrs, whereas rib cage strapping produced a more marked increase at low frequencies; thus a frequency dependence of Rrs was induced. A similar pattern, but with lower absolute values, of Rrs was obtained by thoracic strapping when the subject was breathing at control FRC. Xrs was decreased, especially at low frequencies, with abdominal strapping and even more with thoracic strapping; thus the resonant frequency of the respiratory system was shifted toward higher frequencies. Partitioning Rrs and Xrs into resistance and reactance of lungs and chest wall demonstrated that the different effects of chest wall and abdominal strapping on Rrs and Xrs reflect changes mainly of chest wall mechanics. PMID:3781983

  19. Process factors influencing spinning deformation of thin-walled tubular part with longitudinal inner ribs

    Institute of Scientific and Technical Information of China (English)

    江树勇; 薛克敏; 宗影影; 喻林

    2004-01-01

    As a successively and locally plastic deformation process, ball backward spinning is applied for the purpose of producing thin-walled tubular parts with longitudinal inner ribs. By simplifying ball backward spinning as forward extrusion mechanics model, slab method is used in order to solve spinning force. Based on plastic mechanics, the influence of the process parameters involved on formability of inner ribs as well as the quality defects of spun parts is analyzed so as to present an approach to acquire the desired parts. The quality of inner ribs is one of the critical tasks in obtaining the desired spun workpieces and the height of inner rib depends greatly on spinning material,ball diameter, feed ratio, and wall thickness of tubular blank. The knowledge of the influence of process variables such as ball diameter, feed ratio, and wall thickness of tubular blank on the spinning process is essential to prevent the quality defects of the spun parts and obtain the desired spun parts.

  20. PENGARUH KEPUASAN KONSUMEN TERHADAP KESETIAN MEREK (Studi Kasus Restoran The Prime Steak & Ribs Surabaya

    Directory of Open Access Journals (Sweden)

    Foedjiawati Foedjiawati

    2005-01-01

    Full Text Available This is a research which observes the relationship between customer satisfaction and their loyalty to The Prime Steak & Ribs Restaurant. The customer satisfaction is measured through some attributes such as, attributes related to the product, attributes related to the service, and attributes related to the purchase. Meanwhile, the loyalty of its brand is measured through habitual behaviour, switching cost, satisfaction, liking of the brand and commitment. The result of the research reveals that customer satisfaction levels to The Prime Steak & Ribs Restaurant tends to be good. Some attributes still have a variety of high grade, and there is a positive causal influence that is significant between the customer satisfaction and the loyalty of the brand. Thus, the result of the research is relevant and at the same time supports the theory of brand loyalty. Abstract in Bahasa Indonesia : Penelitian Pengaruh Kepuasan Konsumen terhadap Kesetiaan Merek pada Restoran the Prime Steak & Ribs, kepuasan konsumen diukur melalui Attributes related to the product, Attributes related to the service, Attributes related to the purchase, kesetiaan merek diukur melalui habitual behaviour, switching cost, satisfaction, liking of the brand, dan commitment. Hasil penelitian mengungkapakan bahwa kepuasan konsumen di The Prime Steak & Ribs mendapat penilaian yang cenderung baik, beberapa atribut masih mempunyai variasi penilaian yang tinggi, dan terdapat hubungan pengaruh positip yang signifikan antara kepuasan konsumen dengan kesetiaan merek, dengan demikian hasil penelitian mendukung konsep teori tentang kesetiaan merek. Kata kunci: kepuasan, kesetiaan merek.

  1. Detection of rib fractures in an abused infant using digital radiography: a laboratory study

    International Nuclear Information System (INIS)

    To assess the diagnostic performance of digital radiography using charge-coupled device (CCD) technology in the detection of rib fracture in infant abuse.Materials and methods. Four fractured posterior rib arcs and eight normal ribs removed at autopsy from a 10-month-old abused infant were radiographed using a CCD prototype, four clinical film-screen systems, and direct-exposure film. Each rib was viewed with these six systems in nine different projections. The resultant 648 images were assessed for probability of fracture (0-100%) by four pediatric radiologists. The calculated area under the resultant ROC curves (Az) for the CCD was compared with those obtained with direct-exposure, high-detail, medium and fast film-screen radiographic systems. The mean Az for the CCD (0.937) fell within the range of the high-detail systems (0.934-0.940) and was significantly higher (p20 line pairs per millimeter) the CCD performance was comparable (Az=0.944 vs. 0.937). The similar performance can be explained by the higher contrast resolution of the digital technology. This study indicates that in the ex vivo setting, digital radiology can perform comparably to high-detail film-screen imaging. The findings suggest that digital radiography has the potential to replace film-screen imaging in the evaluation of inflicted skeletal injury in infants. (orig.)

  2. EFFECTS OF FORAGE SPECIES ON RIB COMPOSITION, COLOR, AND PALATABILITY IN FORAGE-FINISHED BEEF

    Science.gov (United States)

    Forty-seven Angus-crossbred steers were used to evaluate the effects of forage species grazed in the last 41 d of the finishing period on rib composition, color, and palatability in forage-finished beef and compared to traditional high concentrate finished. Steers grazed naturalized pastures (bluegr...

  3. Rib Torque Does Not Assist Resting Tidal Expiration or Most Conversational Speech Expiration

    Science.gov (United States)

    Hixon, Thomas J.

    2006-01-01

    Purpose: This research note discusses a common misconception in speech science and speech-language pathology textbooks that rib torque (i.e., "rotational stress") assists resting tidal expiration and conversational speech production. Method: The nature of this misconception is considered. Conclusion: An alternate conceptualization is offered that…

  4. Medial scapular winging associated with rib fractures and plating corrected with pectoralis major transfer

    Directory of Open Access Journals (Sweden)

    John G. Skedros

    2014-01-01

    CONCLUSION: Although the specific cause of the long thoracic nerve injury could not be determined in our patient, it was associated with chest wall trauma in the setting of rib fracture ORIF. The scapular winging was surgically corrected with a pectoralis major transfer.

  5. Clinical significance of conventional rib series in patients with minor thoracic trauma

    International Nuclear Information System (INIS)

    Background: Conventional rib series (RS) represent a dedicated radiographic technique to visualize the bony parts of the chest wall. The method is commonly used to evaluate minor thoracic trauma, frequently in combination with chest radiographs (CRs). The aim of this study is to asses the clinical relevance of rib fractures diagnosed by RS in minor thoracic trauma. Methods: Retrospective study of 669 patients who received RS for the evaluation of minor thoracic trauma. 405 of the 669 patients received an additional CR. Radiological reports were classified into fracture versus no fracture. Patients were divided into four groups depending on the clinical follow-up. The findings of RS and CR were analyzed using the McNemar test. The statistical significance between the results of the radiographic examinations and the clinical follow-up was analyzed by the Chi-Square test and the Kruskal-Wallis test. Results: We included 669 patients (61.4% men, 38.6% women, median age: 51 years, range: 13-92 years). Analyzing the reports of 669 patients who received RS, 157 (23.5%) patients were diagnosed with at least one fractured rib while no fracture was found in 512 (76.5%) patients. Considering the 157 patients with fractured ribs, 73 (46.8%) had a single fracture, 38 (24.4%) and two fractures and 45 (28.8%) had more than two fractures. When assessing the 405 CRs, we detected 69 (17%) fractures while the corresponding RS of the same patients revealed 87 (21.5%) fractures (p < 0.05). Concerning all patients with rib fractures, 63.1% received medical therapy, while 64.5% of those patients without a radiologically documented fracture also received therapy (p = 0.25). Conclusion: Our results suggest a limited clinical value of detected rib fractures based on RS. Despite being superior compared to CR in diagnosing rib fractures, the results from RS seem to have no significant influence on further clinical management and therapeutic measures. Minor thoracic trauma should be evaluated

  6. Clinical significance of conventional rib series in patients with minor thoracic trauma

    Energy Technology Data Exchange (ETDEWEB)

    Hoffstetter, P.; Dornia, C. [Asklepios Medical Center, Bad Abbach (Germany). Radiology; University Medical Center Regensburg (Germany). Radiology; Wagner, M.; Niessen, C.; Dendl, L.M.; Stroszczynski, C.; Schreyer, A.G. [University Medical Center Regensburg (Germany). Radiology; Al Suwaidi, M.H. [Asklepios Medical Center, Bad Abbach (Germany). Rheumatology/Clinical Immmunology

    2014-09-15

    Background: Conventional rib series (RS) represent a dedicated radiographic technique to visualize the bony parts of the chest wall. The method is commonly used to evaluate minor thoracic trauma, frequently in combination with chest radiographs (CRs). The aim of this study is to asses the clinical relevance of rib fractures diagnosed by RS in minor thoracic trauma. Methods: Retrospective study of 669 patients who received RS for the evaluation of minor thoracic trauma. 405 of the 669 patients received an additional CR. Radiological reports were classified into fracture versus no fracture. Patients were divided into four groups depending on the clinical follow-up. The findings of RS and CR were analyzed using the McNemar test. The statistical significance between the results of the radiographic examinations and the clinical follow-up was analyzed by the Chi-Square test and the Kruskal-Wallis test. Results: We included 669 patients (61.4% men, 38.6% women, median age: 51 years, range: 13-92 years). Analyzing the reports of 669 patients who received RS, 157 (23.5%) patients were diagnosed with at least one fractured rib while no fracture was found in 512 (76.5%) patients. Considering the 157 patients with fractured ribs, 73 (46.8%) had a single fracture, 38 (24.4%) and two fractures and 45 (28.8%) had more than two fractures. When assessing the 405 CRs, we detected 69 (17%) fractures while the corresponding RS of the same patients revealed 87 (21.5%) fractures (p < 0.05). Concerning all patients with rib fractures, 63.1% received medical therapy, while 64.5% of those patients without a radiologically documented fracture also received therapy (p = 0.25). Conclusion: Our results suggest a limited clinical value of detected rib fractures based on RS. Despite being superior compared to CR in diagnosing rib fractures, the results from RS seem to have no significant influence on further clinical management and therapeutic measures. Minor thoracic trauma should be evaluated

  7. Data Qualification Report For DTN: MO0012RIB00065.002, Parameter Values For Transfer Coefficients

    International Nuclear Information System (INIS)

    A data-qualification evaluation was conducted on Reference Information Base (RIB) data set MOO0 12RIB00065.002, ''Parameter Values for Transfer Coefficients''. The corroborating data method was used to evaluate the data. This method was selected because it closely matches the literature-review method followed to select parameter values. Five criteria were considered when the corroborating method was used: adequacy of the corroborative literature, sufficiency of value-selection criteria, implementation of the selection criteria, documentation of the process, and whether the analysis was conducted in accordance with applicable quality assurance (QA) procedures. Three criteria were used when a literature review was not conducted: appropriate logic used to select parameters, documentation of the process, and whether the analysis was conducted in accordance with applicable QA procedures. The RIB data item, the associated Analysis and Model Report (AMR), the corroborative literature, and the results of an audit revision O/ICN--0 of the AMR were examined. All calculations and the selection process for all values were repeated and confirmed. The qualification team concluded: (1) A sufficient quantity of corroborative literature was reviewed and no additional literature was identified that should have been considered. (2) The selection criteria were sufficient and resulted in valid parameter values. (3) The process was well defined, adequately documented in the AMR, and correctly followed. (4) The analysis was developed in accordance with applicable QA procedures. No negative findings were documented that resulted in questions about the quality of the data. The qualification team therefore recommends that the qualification status of RIB data set MO0012RIB00065.002 be changed to qualified

  8. Modelling of the acoustic field of a multi-element HIFU array scattered by human ribs

    International Nuclear Information System (INIS)

    The efficacy of high-intensity focused ultrasound (HIFU) for the treatment of a range of different cancers, including those of the liver, prostate and breast, has been demonstrated. As a non-invasive focused therapy, HIFU offers considerable advantages over techniques such as chemotherapy and surgical resection in terms of reduced risk of harmful side effects. Despite this, there are a number of significant challenges which currently hinder its widespread clinical application. One of these challenges is the need to transmit sufficient energy through the rib cage to induce tissue necrosis in the required volume whilst minimizing the formation of side lobes. Multi-element random-phased arrays are currently showing great promise in overcoming the limitations of single-element transducers. Nevertheless, successful treatment of a patient with liver tumours requires a thorough understanding of the way in which the ultrasonic pressure field from a HIFU array is scattered by the rib cage. In order to address this, a boundary element approach based on a generalized minimal residual (GMRES) implementation of the Burton-Miller formulation was used in conjunction with phase conjugation techniques to focus the field of a 256-element random HIFU array behind human ribs at locations requiring intercostal and transcostal treatment. Simulations were carried out on a 3D mesh of quadratic pressure patches generated using CT scan anatomical data for adult ribs 9-12 on the right side. The methodology was validated on spherical and cylindrical scatterers. Field calculations were also carried out for idealized ribs, consisting of arrays of strip-like scatterers, demonstrating effects of splitting at the focus. This method has the advantage of fully accounting for the effect of scattering and diffraction in 3D under continuous wave excitation.

  9. HIFU scattering by the ribs: constrained optimisation with a complex surface impedance boundary condition

    International Nuclear Information System (INIS)

    High intensity focused ultrasound (HIFU) enables highly localised, non-invasive tissue ablation and its efficacy has been demonstrated in the treatment of a range of cancers, including those of the kidney, prostate and breast. HIFU offers the ability to treat deep-seated tumours locally, and potentially bears fewer side effects than more established treatment modalities such as resection, chemotherapy and ionising radiation. There remains however a number of significant challenges which currently hinder its widespread clinical application. One of these challenges is the need to transmit sufficient energy through the ribcage to ablate tissue at the required foci whilst minimising the formation of side lobes and sparing healthy tissue. Ribs both absorb and reflect ultrasound strongly. This sometimes results in overheating of bone and overlying tissue during treatment, leading to skin burns. Successful treatment of a patient with tumours in the upper abdomen therefore requires a thorough understanding of the way acoustic and thermal energy is deposited. Previously, a boundary element (BE) approach based on a Generalised Minimal Residual (GMRES) implementation of the Burton-Miller formulation was developed to predict the field of a multi-element HIFU array scattered by human ribs, the topology of which was obtained from CT scan data [1]. Dissipative mechanisms inside the propagating medium have since been implemented, together with a complex surface impedance condition at the surface of the ribs. A reformulation of the boundary element equations as a constrained optimisation problem was carried out to determine the complex surface velocities of a multi-element HIFU array which generated the acoustic pressure field that best fitted a required acoustic pressure distribution in a least-squares sense. This was done whilst ensuring that an acoustic dose rate parameter at the surface of the ribs was kept below a specified threshold. The methodology was tested at an

  10. Heat transfer augmentation for high heat flux removal in rib-roughened narrow channels

    International Nuclear Information System (INIS)

    Heat transfer augmentation in narrow rectangular channels in a target system is a very important method to remove high heat flux up to 12 MW/m2 generated at target plates of a high-intensity proton accelerator of 1.5 GeV and 1 mA with a proton beam power of 1.5 MW. In this report, heat transfer coefficients and friction factors in narrow rectangular channels with one-sided rib-roughened surface were evaluated for fully developed flows in the range of the Reynolds number from 6,000 to 1,00,000; the rib pitch-to-height ratios (p/k) were 10,20 and 30; the rib height-to-equivalent diameter ratios (k/De) were 0.025, 0.03 and 0.1 by means of previous existing experimental correlations. The rib-roughened surface augmented heat transfer coefficients approximately 4 times higher than the smooth surface at Re=10,000, p/k=10 and k/De=0.1; friction factors increase around 22 times higher. In this case, higher heat flux up to 12 MW/m2 could be removed from the rib-roughened surface without flow boiling which induces flow instability; but pressure drop reaches about 1.8 MPa. Correlations obtained by air-flow experiments have showed lower heat transfer performance with the water-flow conditions. The experimental apparatus was proposed for further investigation on heat transfer augmentation in very narrow channels under water-flow conditions. This report presents the evaluation results and an outline of the test apparatus. (author)

  11. Modelling of the acoustic field of a multi-element HIFU array scattered by human ribs

    Science.gov (United States)

    Gélat, Pierre; ter Haar, Gail; Saffari, Nader

    2011-09-01

    The efficacy of high-intensity focused ultrasound (HIFU) for the treatment of a range of different cancers, including those of the liver, prostate and breast, has been demonstrated. As a non-invasive focused therapy, HIFU offers considerable advantages over techniques such as chemotherapy and surgical resection in terms of reduced risk of harmful side effects. Despite this, there are a number of significant challenges which currently hinder its widespread clinical application. One of these challenges is the need to transmit sufficient energy through the rib cage to induce tissue necrosis in the required volume whilst minimizing the formation of side lobes. Multi-element random-phased arrays are currently showing great promise in overcoming the limitations of single-element transducers. Nevertheless, successful treatment of a patient with liver tumours requires a thorough understanding of the way in which the ultrasonic pressure field from a HIFU array is scattered by the rib cage. In order to address this, a boundary element approach based on a generalized minimal residual (GMRES) implementation of the Burton-Miller formulation was used in conjunction with phase conjugation techniques to focus the field of a 256-element random HIFU array behind human ribs at locations requiring intercostal and transcostal treatment. Simulations were carried out on a 3D mesh of quadratic pressure patches generated using CT scan anatomical data for adult ribs 9-12 on the right side. The methodology was validated on spherical and cylindrical scatterers. Field calculations were also carried out for idealized ribs, consisting of arrays of strip-like scatterers, demonstrating effects of splitting at the focus. This method has the advantage of fully accounting for the effect of scattering and diffraction in 3D under continuous wave excitation.

  12. HIFU scattering by the ribs: constrained optimisation with a complex surface impedance boundary condition

    Science.gov (United States)

    Gélat, P.; ter Haar, G.; Saffari, N.

    2014-04-01

    High intensity focused ultrasound (HIFU) enables highly localised, non-invasive tissue ablation and its efficacy has been demonstrated in the treatment of a range of cancers, including those of the kidney, prostate and breast. HIFU offers the ability to treat deep-seated tumours locally, and potentially bears fewer side effects than more established treatment modalities such as resection, chemotherapy and ionising radiation. There remains however a number of significant challenges which currently hinder its widespread clinical application. One of these challenges is the need to transmit sufficient energy through the ribcage to ablate tissue at the required foci whilst minimising the formation of side lobes and sparing healthy tissue. Ribs both absorb and reflect ultrasound strongly. This sometimes results in overheating of bone and overlying tissue during treatment, leading to skin burns. Successful treatment of a patient with tumours in the upper abdomen therefore requires a thorough understanding of the way acoustic and thermal energy is deposited. Previously, a boundary element (BE) approach based on a Generalised Minimal Residual (GMRES) implementation of the Burton-Miller formulation was developed to predict the field of a multi-element HIFU array scattered by human ribs, the topology of which was obtained from CT scan data [1]. Dissipative mechanisms inside the propagating medium have since been implemented, together with a complex surface impedance condition at the surface of the ribs. A reformulation of the boundary element equations as a constrained optimisation problem was carried out to determine the complex surface velocities of a multi-element HIFU array which generated the acoustic pressure field that best fitted a required acoustic pressure distribution in a least-squares sense. This was done whilst ensuring that an acoustic dose rate parameter at the surface of the ribs was kept below a specified threshold. The methodology was tested at an

  13. Modelling of the acoustic field of a multi-element HIFU array scattered by human ribs

    Energy Technology Data Exchange (ETDEWEB)

    Gelat, Pierre [National Physical Laboratory, Hampton Road, Teddington TW11 0LW (United Kingdom); Ter Haar, Gail [Therapeutic Ultrasound Group, Physics Department, Institute of Cancer Research, Sutton SM2 5NG (United Kingdom); Saffari, Nader, E-mail: Pierre.Gelat@npl.co.uk [Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE (United Kingdom)

    2011-09-07

    The efficacy of high-intensity focused ultrasound (HIFU) for the treatment of a range of different cancers, including those of the liver, prostate and breast, has been demonstrated. As a non-invasive focused therapy, HIFU offers considerable advantages over techniques such as chemotherapy and surgical resection in terms of reduced risk of harmful side effects. Despite this, there are a number of significant challenges which currently hinder its widespread clinical application. One of these challenges is the need to transmit sufficient energy through the rib cage to induce tissue necrosis in the required volume whilst minimizing the formation of side lobes. Multi-element random-phased arrays are currently showing great promise in overcoming the limitations of single-element transducers. Nevertheless, successful treatment of a patient with liver tumours requires a thorough understanding of the way in which the ultrasonic pressure field from a HIFU array is scattered by the rib cage. In order to address this, a boundary element approach based on a generalized minimal residual (GMRES) implementation of the Burton-Miller formulation was used in conjunction with phase conjugation techniques to focus the field of a 256-element random HIFU array behind human ribs at locations requiring intercostal and transcostal treatment. Simulations were carried out on a 3D mesh of quadratic pressure patches generated using CT scan anatomical data for adult ribs 9-12 on the right side. The methodology was validated on spherical and cylindrical scatterers. Field calculations were also carried out for idealized ribs, consisting of arrays of strip-like scatterers, demonstrating effects of splitting at the focus. This method has the advantage of fully accounting for the effect of scattering and diffraction in 3D under continuous wave excitation.

  14. Turbulent forced convection in a heat exchanger square channel with wavy-ribs vortex generator☆

    Institute of Scientific and Technical Information of China (English)

    Amnart Boonloi; Withada Jedsadaratanachai

    2015-01-01

    Turbulent forced convective heat transfer and flow configurations in a square channel with wavy-ribs inserted diagonally are examined numerical y. The influences of the 30° and 45° flow attack angles for wavy-ribs, blockage ratio, RB=b/H=0.05–0.25 with single pitch ratio, RP=P/H=1 are investigated for the Reynolds number based on the hydraulic diameter of the square channel, Re=3000–20000. The use of the wavy-ribs, which inserted diagonal in the square channel, is aimed to help to improve the thermal performance in heat exchange systems. The finite volume method and SIMPLE algorithm are applied to the present numerical simulation. The results are presented on the periodic flow and heat transfer profiles, flow configurations, heat transfer characteristics and the performance evaluations. The mathematical results reveal that the use of wavy-ribs leads to a higher heat transfer rate and friction loss over the smooth channel. The heat transfer enhancements are around 1.97–5.14 and 2.04–5.27 times over the smooth channel for 30° and 45° attack angles, respectively. However, the corre-sponding friction loss values for 30° and 45° are around 4.26–86.55 and 5.03–97.98 times higher than the smooth square channel, respectively. The optimum thermal enhancement factor on both cases is found at RB=0.10 and the lowest Reynolds number, Re=3000, to be about 1.47 and 1.52, respectively, for 30° and 45° wavy-ribs.

  15. Idiopathic polypoidal choroidal vasculopathy masquerading as choroidal tumors: one year follow-up of a peripheral lesion

    Directory of Open Access Journals (Sweden)

    Rony Carlos Preti

    2015-06-01

    Full Text Available ABSTRACT This case report describes peripheral idiopathic polypoidal choroidal vasculopathy (IPCV with a collection of small aneurysmal dilations that masqueraded as choroidal tumors in an elderly patient. A 68-year-old African American woman was referred to us with a suspected diagnosis of asymptomatic vascular choroidal tumor and choroidal capillary hemangioma, affecting the temporal peripheral fundus. Upon examination, optical coherence tomography (OCT revealed two large hemorrhagic pigment epithelium detachments (PED, and indocyanine green angiography (ICG confirmed the diagnosis of IPCV. One year later, there was reduction in the hemorrhagic pigment epithelium detachments and the lesion took on a different appearance, resembling a choroidal osteoma. No treatment was necessary despite the presence of multiple polyps. IPCV is a rare condition that can resemble other choroidal diseases depending on the stage of presentation. OCT is the best tool to determine the characteristics of the lesions, and indocyanine green angiography should be used to confirm the diagnosis. Not all cases require treatment.

  16. 38 CFR 3.379 - Anterior poliomyelitis.

    Science.gov (United States)

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Anterior poliomyelitis. 3... Specific Diseases § 3.379 Anterior poliomyelitis. If the first manifestations of acute anterior poliomyelitis present themselves in a veteran within 35 days of termination of active military service, it...

  17. Pediatric anterior cruciate ligament reconstruction

    OpenAIRE

    McConkey, Mark O.; Bonasia, Davide Edoardo; Amendola, Annunziato

    2011-01-01

    An increasing number of anterior cruciate ligament (ACL) injuries are seen in children now than in the past due to increased sports participation. The natural history of ACL deficient knees in active individuals, particularly in children is poor. Surgical management of ACL deficiency in children is complex due to the potential risk of injury to the physis and growth disturbance. Delaying ACL reconstruction until maturity is possible but risks instability episodes and intra-articular damage. S...

  18. Anterior impingement syndrome in dancers

    OpenAIRE

    O’Kane, John William; Kadel, Nancy

    2007-01-01

    Anterior impingement is a common problem in dancers occurring primarily secondary to the repetitive forced ankle dorsiflexion inherent in ballet. Symptoms generally occur progressively and may respond to conservative treatment including addressing biomechanical faults that contribute to the problem. As impingement progresses, movements essential to ballet may become impossible and arthroscopic ankle surgery is often effective for both diagnosis and treatment, allowing athletes to return to da...

  19. Multiple Rib Exostoses in a Boy: A Rare CaseResulting in Surgery Secondary to Cosmetic Concerns

    Directory of Open Access Journals (Sweden)

    Seyed Hosein Fattahi Masoum

    2014-09-01

    Full Text Available A seven year-old boy with several painless masses on the ribs and shoulder was referred to our hospital. The masses were so prominent that they prevented the child’s sleep. Since the patient had been ridiculed by his friends due to the rib prominences, he had refused to attend school. After clinical and radiological evaluations, the masses were diagnosed as hereditary multiple exostoses of the shoulder and ribs. He underwent surgery for cosmetic reasons resulting in the patient’s return to a normal life.

  20. Multiple Rib Exostoses in a Boy: A Rare CaseResulting in Surgery Secondary to Cosmetic Concerns

    OpenAIRE

    Seyed Hosein Fattahi Masoum; Ali Moradi; Mohammad Hosein Ebrahimzadeh

    2014-01-01

    A seven year-old boy with several painless masses on the ribs and shoulder was referred to our hospital. The masses were so prominent that they prevented the child’s sleep. Since the patient had been ridiculed by his friends due to the rib prominences, he had refused to attend school. After clinical and radiological evaluations, the masses were diagnosed as hereditary multiple exostoses of the shoulder and ribs. He underwent surgery for cosmetic reasons resulting in the patient’s return to a ...

  1. The role of acoustic nonlinearity in tissue heating behind the rib cage using high intensity focused ultrasound phased array

    OpenAIRE

    Yuldashev, Petr V.; Shmeleva, Svetlana M.; Ilyin, Sergey A.; Sapozhnikov, Oleg A.; Gavrilov, Leonid R.; Khokhlova, Vera A.

    2013-01-01

    The goal of this study was to investigate theoretically the effects of nonlinear propagation in a high intensity focused ultrasound (HIFU) field produced by a therapeutic phased array and the resultant heating of tissue behind a rib cage. Three configurations of focusing were simulated: in water, in water with ribs in the beam path, and in water with ribs backed by a layer of soft tissue. The Westervelt equation was used to model the nonlinear HIFU field and a 1 MHz phased array consisting of...

  2. Improvement of diagnostic confidence for detection of multiple myeloma involvement of the ribs by a new CT software generating rib unfolded images: Comparison with 5- and 1-mm axial images

    Energy Technology Data Exchange (ETDEWEB)

    Homann, Georg; Mustafa, Deedar Farhad; Nikolaou, Konstantin; Horger, Marius [Eberhard Karls University Tuebingen, Department of Diagnostic and Interventional Radiology, Tuebingen (Germany); Weisel, Katja [Eberhard Karls University Tuebingen, Department of Internal Medicine II, Tuebingen (Germany); Ditt, Hendrik [Healthcare Sector Imaging and Therapy Division, Siemens AG, Forchheim (Germany)

    2015-04-02

    To investigate the performance of a new CT software generating rib unfolded images for improved detection of rib osteolyses in patients with multiple myeloma. One hundred sixteen patients who underwent whole-body reduced-dose multidetector computed tomography (WBRD-MDCT) for multiple myeloma diagnosis and during follow-up were retrospectively evaluated. Nonenhanced CT scans with 5- and 1-mm slice thickness were interpreted by two readers with focus on detection of rib involvement (location, number, fracture). Image analysis of ''unfolded,'' 1-mm-based CT rib images was subsequently undertaken. We classified the number of lytic bone lesions into 0, 1, 2, <5, <10 and ≥10. For all three data sets the reading time was registered. An approximated sum of 6,727 myeloma-related rib lesions was found. On a patient-based analysis, CT (5 mm), CT (1 mm) and CT (1 mm ''unfolded rib'') yielded a sensitivity, specificity and accuracy of 79.7/94.7/87.1, 88.1/93/90.5 and 98.3/96.5/97.4, respectively. In a lesion-based analysis, the sensitivity, specificity and accuracy of the three evaluations were 69.7/87.2/70.5, 79.8/55.9/78 and 96.5/89.7/96.1. Mean reading time for 5 mm/1 mm axial images and unfolded images was 178.7/215.1/90.8 s, respectively. The generation of ''unfolded rib'' images improves detection of rib involvement in patients with multiple myeloma and significantly reduces reading time. (orig.)

  3. Improvement of diagnostic confidence for detection of multiple myeloma involvement of the ribs by a new CT software generating rib unfolded images: Comparison with 5- and 1-mm axial images

    International Nuclear Information System (INIS)

    To investigate the performance of a new CT software generating rib unfolded images for improved detection of rib osteolyses in patients with multiple myeloma. One hundred sixteen patients who underwent whole-body reduced-dose multidetector computed tomography (WBRD-MDCT) for multiple myeloma diagnosis and during follow-up were retrospectively evaluated. Nonenhanced CT scans with 5- and 1-mm slice thickness were interpreted by two readers with focus on detection of rib involvement (location, number, fracture). Image analysis of ''unfolded,'' 1-mm-based CT rib images was subsequently undertaken. We classified the number of lytic bone lesions into 0, 1, 2, <5, <10 and ≥10. For all three data sets the reading time was registered. An approximated sum of 6,727 myeloma-related rib lesions was found. On a patient-based analysis, CT (5 mm), CT (1 mm) and CT (1 mm ''unfolded rib'') yielded a sensitivity, specificity and accuracy of 79.7/94.7/87.1, 88.1/93/90.5 and 98.3/96.5/97.4, respectively. In a lesion-based analysis, the sensitivity, specificity and accuracy of the three evaluations were 69.7/87.2/70.5, 79.8/55.9/78 and 96.5/89.7/96.1. Mean reading time for 5 mm/1 mm axial images and unfolded images was 178.7/215.1/90.8 s, respectively. The generation of ''unfolded rib'' images improves detection of rib involvement in patients with multiple myeloma and significantly reduces reading time. (orig.)

  4. A combined thermal dissociation and electron impact ionization source for RIB generation

    International Nuclear Information System (INIS)

    The probability for simultaneously dissociating and efficiently ionizing the individual atomic constituents of molecular feed materials with conventional, hot-cathode, electron-impact ion sources is low and consequently, the ion beams from these sources often appear as mixtures of several molecular sideband beams. This fragmentation process leads to dilution of the intensity of the species of interest for RIB applications where beam intensity is at a premium. We have conceived an ion source that combines the excellent molecular dissociation properties of a thermal dissociator and the high ionization efficiency characteristics of an electron impact ionization source that will, in principle, overcome this handicap. The source concept will be evaluated as a potential candidate for use for RIB generation at the Holifield Radioactive Ion Beam Facility (HRIBF), now under construction at the Oak Ridge National Laboratory. The design features and principles of operation of the source are described in this article

  5. Development of the HRIBF 25-MV tandem accelerator as a RIB accelerator

    International Nuclear Information System (INIS)

    The Holifield Facility 25URC tandem accelerator will begin accelerating radioactive ion beams (RIBs) for nuclear structure and astrophysics research in 1996. This paper addresses the development of the accelerator to allow optimum operation with the particular challenges associated with RIBs. New diagnostics for ultra-low-intensity beams are being installed and the terminal potential stabilization system is being studied to optimize control with these low beam intensities. A new resistor-based voltage-grading system has resulted in more stable operation as well as allowing operation at the very low terminal potentials which are required for some astrophysics experiments. Also addressed is beam transmission optimization, particularly at low terminal potentials, and operation of the accelerator at high terminal potentials

  6. A Rare Case of Rib Osteoblastoma: Imaging Features and Review of Literature

    International Nuclear Information System (INIS)

    Osteoblastoma is a rare benign, but locally aggressive bone tumor with rare malignant transformation. It mostly affects the vertebral column and long bones. Radiographically, it is seen as an expansile, oval, sclerotic or lytic mass-like lesion with well-defined borders, although sometimes it may mimic a malignant tumor such as osteogenic sarcoma by its irregular borders. Herein, we report a case of osteoblastoma in a 22 year-old man with a long history of back and neck pain accompanied with neck stiffness. On the routine chest X-ray, the salient lesion appeared as an expansile, oval, sclerotic mass with well-defined borders and speckled calcification without any internal lucency and periosteal reaction, involving the posterolateral aspect of the first left thoracic rib, a rare anatomical site. Despite the unusual location, osteoblastoma should be considered in the differential diagnosis of a solitary rib lesion

  7. Performance estimation of artificially roughened solar air heater duct provided with continuous ribs

    Directory of Open Access Journals (Sweden)

    Mridul Sharma, Varun

    2010-09-01

    Full Text Available The use of an artificial roughness on a surface is an effective technique to enhance the rate of heat transfer to fluid flow in the duct of a solar air heater. This paper presents a comparison of exergetic performance of solar air heaters having different types of geometry of roughness elements (continuous ribs on the absorber plate. The exergy efficiency has been computed by using the correlations for heat transfer and friction factor developed by various investigators within the investigated range of operating and system parameters. The exergy efficiency based criterion shows the better results at lower value of Re. There is not a single roughness geometry which gives best exergetic performance for whole range of Reynolds number. Solar air heater having rib-grooved and arc shaped wire as artificial roughness is found to have better exergy efficiency in the lower range of Reynolds number. However, smooth duct is found suitable in the higher range of Reynolds number.

  8. Flow and heat transfer in parallel channel attached with equally-spaced ribs, 3

    International Nuclear Information System (INIS)

    The computer code for analysing the flow and heat transfer characteristics in a parallel channel with equally-spaced ribs, which was reported in the previous paper with numerical results in the range of Reynolds number from 10 to 250, was revised in order to eliminate the wiggles of the solution of finite difference equation contained convective and diffusive terms by the upwind-difference method. Using this code, numerical calculations were carried out in the range of Reynolds number from 150 to 850. The following were the results obtained: (1) The mean Nusselt number of a ribbed channel is about 10 at the upper wall and about 7.5 at the lower wall in the range of Reynolds number from 150 to 850. (2) The upwind-difference method is useful to eliminate the wiggles of the solution of a finite difference equation contained convective and diffusive terms. (author)

  9. Rib fractures after reirradiation plus hyperthermia for recurrent breast cancer. Predictive factors

    Energy Technology Data Exchange (ETDEWEB)

    Oldenborg, Sabine; Valk, Christel; Os, Rob van; Voerde Sive Voerding, Paul zum; Crezee, Hans; Tienhoven, Geertjan van; Rasch, Coen [University of Amsterdam, Department of Radiation Oncology, Z1-215, Academic Medical Center, Amsterdam (Netherlands); Oei, Bing; Venselaar, Jack [Institute Verbeeten (BVI), Tilburg (Netherlands); Randen, Adrienne van [University of Amsterdam (AMC), Department of Radiology Academic Medical Center, Amsterdam (Netherlands)

    2016-04-15

    Combining reirradiation (reRT) and hyperthermia (HT) has shown high therapeutic value for patients with locoregional recurrent breast cancer (LR). However, additional toxicity of reirradiation (e.g., rib fractures) may occur. The aim of this study is to determine the impact of potential risk factors on the occurrence of rib fractures. From 1982-2005, 234 patients were treated with adjuvant reRT + HT after surgery for LR. ReRT consisted typically of 8 fractions of 4 Gy twice a week, or 12 fractions of 3 Gy four times a week. A total of 118 patients were irradiated with abutted photon and electron fields. In all, 60 patients were irradiated using either one or alternating combinations of abutted AP electron fields. Hyperthermia was given once or twice a week. The 5-year infield local control (LC) rate was 70 %. Rib fractures were detected in 16 of 234 patients (actuarial risk: 7 % at 5 years). All rib fractures occurred in patients treated with a combination of photon and abutted electron fields (p = 0.000); in 15 of 16 patients fractures were located in the abutment regions. The other significant predictive factors for rib fractures were a higher fraction dose (p = 0.040), large RT fields, and treatment before the year 2000. ReRT + HT results in long-term LC. The majority of rib fractures were located in the photon/electron abutment area, emphasizing the disadvantage of field overlap. Large abutted photon/electron fields combined with 4 Gy fractions increase the number of rib fractures in this study group. However, as these factors were highly correlated no relative importance of the individual factors could be estimated. Increasing the number of HT sessions a week does not increase the risk of rib fractures. (orig.) [German] Der kombinierte Einsatz von Rebestrahlung (reRT) und Hyperthermie (HT) zeigt eine hohe Wirksamkeit bei Patienten mit lokoregional rezidiviertem Brustkrebs (LR). Jedoch koennen zusaetzliche toxische Effekte von reRT (z. B. Rippenfrakturen

  10. Study of heat transfer due to turbulent flow of nanofluids through rib-groove channel

    Science.gov (United States)

    Al-Shamani, A. N.; Sopian, K.; Abed, A. M.; Alghoul, M. A.; Ruslan, M. H.; Mat, S.

    2015-09-01

    Nanofluids for improve characteristics flow in a rib-groove channel are investigate. The continuity, momentum and energy equations were solved by FLUENT program. The bottom wall of channel is heated while the upper wall is symmetry, the left side velocity inlet, and the right side is outlet (pressure out). Four different rib-groove shapes are used. Four different types of nanoparticles, Al2O3, CuO, SiO2, and ZnO with different volumes fractions in the range of 1% to 4% and different nanoparticle diameter in the range of 25 nm to 70 nm, are dispersed in the base fluid water are used. In this paper, several parameters such as different Reynolds numbers in the range of 10000 nanoparticle diameter increases.

  11. A Rare Case of Dacron Graft Rupture due to Friction against a Rib.

    Science.gov (United States)

    Matsuyama, Katsuhiko; Kuinose, Masahiko; Koizumi, Nobusato; Iwahashi, Toru; Toguchi, Kayo; Ogino, Hitoshi

    2014-12-01

    A 54-year-old man underwent aortic repair for the infected thoracoabdominal aneurysm with a woven Dacron graft (Vascutek, Renfrewshire, Scotland) treated with gentian violet. Four months later, he complained of sudden back pain, resulting in preshock status. Computed tomographic scans showed massive hematoma around the Dacron graft, suggesting graft rupture. Initially, emergency thoracic endovascular aortic repair was performed, which was subsequently followed by open repair. The Dacron graft had a small hole, which was completely compatible with the site contacting with the rib. The graft rupture was considered due to its friction against the rib. We report on a rare event of mechanical Dacron graft rupture after the thoracoabdominal aortic replacement. PMID:25798369

  12. Recent results from the TwinSol low-energy RIB facility

    Science.gov (United States)

    Becchetti, F. D.; Kolata, J. J.

    2016-06-01

    We report on some of the recent developments and experimental work done at the twin-solenoid low-energy radioactive-ion-beam (RIB) facility TwinSol installed at the U Notre Dame 10 MV FN tandem accelerator. The TwinSol facility is a joint project of the University of Michigan (UM) and the University of Notre Dame (UND), and includes several U.S. and foreign collaborators. A number of significant experiments including RIB-induced transfer reactions, elastic scattering, resonant scattering, and fusion at energies near and well below the Coulomb barrier have been performed with this facility. Several of these as well as future work and upgrades planned will be described.

  13. Performance of a non-tapered 3D morphing wing with integrated compliant ribs

    International Nuclear Information System (INIS)

    Morphing wings have a high potential for improving the performance and reducing the fuel consumption of modern aircraft. Thanks to its simplicity, the compliant belt-rib concept is regarded by the authors as a promising solution. Using the compliant rib designed by Hasse and Campanile as a starting point, a compliant morphing wing made of composite materials is designed. Innovative methods for optimal placing of the actuation and for the quantification of the morphing are used. The performance of the compliant morphing wing in terms of three-dimensional (3D) structural behaviour and aerodynamic properties, both two- and three-dimensional, is presented and discussed. The fundamental importance of considering 3D coupling effects in the determination of the performance of morphing aerofoils is shown. (paper)

  14. Dynamic Stability of a Cylindrical Shell Reinforced by Longitudinal Ribs and a Hollow Cylinder Under the Action of Axial Forces

    Science.gov (United States)

    Bakulin, V. N.; Volkov, E. N.; Nedbai, A. Ya.

    2016-05-01

    The dynamic stability of a cylindrical orthotropic shell reinforced by longitudinal ribs and a hollow cylinder under the action of axial forces changing harmonically with time was investigated with regard for the axial contact interaction of the shell with the ribs. A solution of the differential equations defining this process has been obtained in the form of trigonometric series in the angular and time coordinates. A two-term approximation of the Mathieu-Hill equations of motion was used for construction of the main region of instability of the shell. As a result, the problem was reduced to a system of algebraic equations for components of displacements of the shell at the locations of the ribs. The problem for uniformly spaced ribs was solved in the explicit form. A numerical example of this solution is presented.

  15. Jaw cyst-Basal cell nevus-Bifid rib syndrome: A case report

    OpenAIRE

    Rai S; Gauba K

    2007-01-01

    Jaw cyst-Basal cell nevus-Bifid rib syndrome or Gorlin-Goltz syndrome involves multiple organ system. The most common findings include multiple odontogenic keratocysts in the jaws and basal cell nevus on the skin that have an early age onset. These multiple odontogenic keratocysts warrant aggressive treatment at the earliest because of the damage and possible complications associated with them. Recurrence in these lesions is the most characteristic feature that has to be taken in consideratio...

  16. The chemical heritage of Aspergillus flavus in A. oryzae RIB 40

    DEFF Research Database (Denmark)

    Rank, Christian; Klejnstrup, Marie Louise; Petersen, Lene Maj; Frisvad, Jens Christian; Larsen, Thomas Ostenfeld

    Aspergillus oryzae is a very important species in biotechnology and has been used for centuries in traditional Asian fermentation. The RIB40 strain is particularly interesting as it was one of the first genome sequenced Aspergilli together with A. flavus, a prominent food and feed contaminant...... with indications to specific genetic changes. Several new metabolites and changes in biosynthetic routes have been found in A. oryzae, indicating subtle changes in the genomic heritage from A. flavus....

  17. Bone images from dual-energy subtraction chest radiography in the detection of rib fractures

    International Nuclear Information System (INIS)

    Objective: To assess the sensitivity and image quality of chest radiography (CXR) with or without dual-energy subtracted (ES) bone images in the detection of rib fractures. Materials and methods: In this retrospective study, 39 patients with 204 rib fractures and 24 subjects with no fractures were examined with a single exposure dual-energy subtraction digital radiography system. Three blinded readers first evaluated the non-subtracted posteroanterior and lateral chest radiographs alone, and 3 months later they evaluated the non-subtracted images together with the subtracted posteroanterior bone images. The locations of rib fractures were registered with confidence levels on a 3-grade scale. Image quality was rated on a 5-point scale. Marks by readers were compared with fracture localizations in CT as a standard of reference. Results: The sensivity for fracture detection using both methods was very similar (34.3% with standard CXR and 33.5% with ES-CXR, p = 0.92). At the patient level, both sensitivity (71.8%) and specificity (92.9%) with or without ES were identical. Diagnostic confidence was not significantly different (2.61 with CXR and 2.75 with ES-CXR, p = 0.063). Image quality with ES was rated higher than that on standard CXR (4.08 vs. 3.74, p < 0.001). Conclusions: Despite a better image quality, adding ES bone images to standard radiographs of the chest does not provide better sensitivity or improved diagnostic confidence in the detection of rib fractures.

  18. Turbulent flow in rib-roughened channel under the effect of Coriolis and rotational buoyancy forces

    Science.gov (United States)

    Coletti, Filippo; Jacono, David Lo; Cresci, Irene; Arts, Tony

    2014-04-01

    The turbulent flow inside a rotating channel provided with transverse ribs along one wall is studied by means of two-dimensional time-resolved particle image velocimetry. The measurement set-up is mounted on the same rotating disk with the test section, allowing to obtain the same accuracy and resolution as in a non-rotating rig. The Reynolds number is 15 000, and the rotation number is 0.38. As the ribbed wall is heated, both the Coriolis force and the centrifugal force play a role in the fluid dynamics. The mean velocity fields highlight the major impact of the rotational buoyancy (characterized by a buoyancy number of 0.31) on the flow along the leading side of the duct. In particular, since the flow is directed radially outward, the near-wall layers experience significant centripetal buoyancy. The recirculation area behind the obstacles is enlarged to the point of spanning the whole inter-rib space. Also the turbulent fluctuations are significantly altered, and overall augmented, with respect to the non-buoyant case, resulting in higher turbulence levels far from the rib. On the other hand the centrifugal force has little or no impact on the flow along the trailing wall. Vortex identification, proper orthogonal decomposition, and two-point correlations are used to highlight rotational effects, and in particular to determine the dominant scales of the turbulent unsteady flow, the time-dependent behavior of the shear layer and of the recirculation bubble behind the wall-mounted obstacles, the lifetime and advection velocity of the coherent structures.

  19. Single mode and polarization independence in the strained silicon-on-insulator rib waveguides

    Directory of Open Access Journals (Sweden)

    Milošević Milan M.

    2008-01-01

    Full Text Available In this paper we investigate the most popular silicon waveguide structures in the form of a silicon-on-insulator (SOI rib waveguide. Single mode and birefringence free conditions in these relatively small waveguides are discussed and the influence of the top oxide cladding stress is analyzed. Field profiles for a wide range of waveguide cross section shapes and dimensions are systematically considered. Design guidelines for this type of SOI waveguides are presented.

  20. Performance estimation of artificially roughened solar air heater duct provided with continuous ribs

    OpenAIRE

    Mridul Sharma, Varun

    2010-01-01

    The use of an artificial roughness on a surface is an effective technique to enhance the rate of heat transfer to fluid flow in the duct of a solar air heater. This paper presents a comparison of exergetic performance of solar air heaters having different types of geometry of roughness elements (continuous ribs) on the absorber plate. The exergy efficiency has been computed by using the correlations for heat transfer and friction factor developed by various investigators within the investigat...

  1. Bone images from dual-energy subtraction chest radiography in the detection of rib fractures

    Energy Technology Data Exchange (ETDEWEB)

    Szucs-Farkas, Zsolt, E-mail: zsolt.szuecs@insel.ch [Department of Diagnostic, Interventional and Pediatric Radiology, University Hospital Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland); Lautenschlager, Katrin, E-mail: katrin@students.unibe.ch [Department of Diagnostic, Interventional and Pediatric Radiology, University Hospital Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland); Flach, Patricia M., E-mail: patricia.flach@irm.unibe.ch [Institute of Forensic Medicine, University of Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland); Ott, Daniel, E-mail: daniel.ott@insel.ch [Department of Diagnostic, Interventional and Pediatric Radiology, University Hospital Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland); Strautz, Tamara, E-mail: tamara.strautz@insel.ch [Department of Diagnostic, Interventional and Pediatric Radiology, University Hospital Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland); Vock, Peter, E-mail: peter.vock@insel.ch [Department of Diagnostic, Interventional and Pediatric Radiology, University Hospital Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland); Ruder, Thomas D., E-mail: thomas.ruder@irm.unibe.ch [Institute of Forensic Medicine, University of Bern, Freiburgstrasse 4, Bern CH-3010 (Switzerland)

    2011-08-15

    Objective: To assess the sensitivity and image quality of chest radiography (CXR) with or without dual-energy subtracted (ES) bone images in the detection of rib fractures. Materials and methods: In this retrospective study, 39 patients with 204 rib fractures and 24 subjects with no fractures were examined with a single exposure dual-energy subtraction digital radiography system. Three blinded readers first evaluated the non-subtracted posteroanterior and lateral chest radiographs alone, and 3 months later they evaluated the non-subtracted images together with the subtracted posteroanterior bone images. The locations of rib fractures were registered with confidence levels on a 3-grade scale. Image quality was rated on a 5-point scale. Marks by readers were compared with fracture localizations in CT as a standard of reference. Results: The sensivity for fracture detection using both methods was very similar (34.3% with standard CXR and 33.5% with ES-CXR, p = 0.92). At the patient level, both sensitivity (71.8%) and specificity (92.9%) with or without ES were identical. Diagnostic confidence was not significantly different (2.61 with CXR and 2.75 with ES-CXR, p = 0.063). Image quality with ES was rated higher than that on standard CXR (4.08 vs. 3.74, p < 0.001). Conclusions: Despite a better image quality, adding ES bone images to standard radiographs of the chest does not provide better sensitivity or improved diagnostic confidence in the detection of rib fractures.

  2. Scoliosis Caused by Rib Fusion Following Thoracotomy for Tracheoesophageal Fistula: Case Report

    OpenAIRE

    Dunlay, Ryan P; Jones, Kevin B.; Weinstein, Stuart L.

    2007-01-01

    Scoliosis as a late complication of thoracotomy has been described previously, but reports are rare. We present the case of a 22 year-old female referred for symptomatic scoliosis. Radiographs demonstrated a severe, structural, upper-thoracic scoliosis with associated right-sided rib fusions. Her medical history was noteworthy for a right posterolateral thoracotomy for repair of a tracheoesophageal fistula during infancy. Radiographs from her general surgical treatments during infancy demonst...

  3. A Novel MoM Approach for Obtaining Accurate and Efficient Solutions in Optical Rib Waveguide

    OpenAIRE

    YENER, Namık

    2002-01-01

    The optical rib waveguide (ORW) plays an important role in the design of several integrated optical devices. Various methods have been proposed for obtaining the modal field solutions in ORW. However, to the best of our knowledge none of them is capable of providing accurate full-wave benchmark solutions. Here we present a novel MoM approach wherein the modes of a loaded rectangular waveguide are utilized as basis functions and demonstrate that this approach is very efficient and yie...

  4. Prediction of Turbulent Flow Structure in a Fully Developed Rib-Roughened Narrow Rectangular Channel

    Institute of Scientific and Technical Information of China (English)

    Md. Shafiqul IsIam; M. Kaminaga; R. Hino; M. Monde

    2009-01-01

    Fully developed turbulent water-flow structure over one-side repeated-fibs in narrow two-dimensional rectangular channels was investigated experimentally by Particle Image Velocimetry (PIV) and analytically by the standard κ-εand nonlinear κ-ε turbulent models. Two fib-pitch to height ratios (p/k) of 10 and 20 were investigated while the rib height was held constant at 4 mm. The rib height-to-channel equivalent diameter ratio (k/De) was 0.1. The streamwise mean velocity and turbulent kinetic energy distributions at six selected axial stations from the center fib for the two Reynolds number (Re) of 7,000 and 20,000 were obtained and compared with the predicted one The performance ability in predicting separating and reattaching turbulent water-flow between the standard κ-ε and nonlinear κ-ε models had yielded no clear conclusion. A large-scale turbulent eddy was generated by the rib promoter and then propagated into the mainstream flow, which led to the deformation of the velocity profile. The turbulent kinetic energy was increased about two times higher at p/k = 20 than that at p/k =10 under the two Reynolds numbers. The effect of the p/k value and the Reynolds number (Re) on reattachment length (XR) was investigated and showed that the p/k and Re had no significant effect on the reattachment length beyond a critical value of Re = 15,000 where XR was found to be approximately 4 times of the rib height under water-flow condi-tion.

  5. Examination of the Lunatic fringe and Uncx4.1 expression by whole-mount in situ hybridization in the embryo of the CKH-Jsr (jumbled spine and ribs) mouse.

    Science.gov (United States)

    Okano, Shinya; Asano, Atsushi; Sasaki, Nobuya; Kon, Yasuhiro; Watanabe, Tomomasa; Agui, Takashi

    2005-02-01

    The CKH-Jsr (jumbled spine and ribs) mouse was found as a spontaneous mutant with malformation of vertebrae, that is, a short trunk and kinky tail. We examined Lunatic Fringe (Lfng) and Uncx4.1 expression in the presomitic mesoderm (PSM) and somites of Jsr-mutant (CKH-Jsr/+) embryos to elucidate pathogenesis of the Jsr mutation. Expression pattern of Lfng in the PSM of Jsr-mutant embryos was similar to that of the normal (C57BL/6) embryos. However, expression pattern of Uncx4.1 in the somites of Jsr-mutant embryos was impaired to be irregular and mosaic, suggesting that the anterior-posterior (A-P) polarity is disordered in the Jsr mutant. These results indicate that the Jsr mutation disrupts the A-P polarity of somites during the somitogenesis without altering Lfng expression pattern in the PSM. PMID:15822856

  6. Validation of connection details between a UHPFRC ribbed slab and steel girders for a new composite bridge deck type

    OpenAIRE

    Toutlemonde, François; LAUVIN, Ludovic; Renaud, Jean Claude; BABY, Florent; Bouteille, Sébastien; RESPLENDINO, Jacques

    2008-01-01

    Within the French R & D project MIKTI focusing on innovative steel-concrete composite bridges, an exhaustive experimental program was carried out to provide an experimental validation of a new ultra-high performance fibre reinforced concrete (UHPFRC) 2 way-ribbed slab made of segments assembled by post-tensioning. Provisions concerning the realization of connection between the UHPFRC ribbed deck and steel profiles, which are critical for ensuring the composite behavior of the full structure, ...

  7. Mach-Zehnder Interferometer Biochemical Sensor Based on Silicon-on-Insulator Rib Waveguide with Large Cross Section

    Directory of Open Access Journals (Sweden)

    Dengpeng Yuan

    2015-08-01

    Full Text Available A high-sensitivity Mach-Zehnder interferometer (MZI biochemical sensing platform based on Silicon-in-insulator (SOI rib waveguide with large cross section is proposed in this paper. Based on the analyses of the evanescent field intensity, the mode polarization and cross section dimensions of the SOI rib waveguide are optimized through finite difference method (FDM simulation. To realize high-resolution MZI read-out configuration based on the SOI rib waveguide, medium-filled trenches are employed and their performances are simulated through two-dimensional finite-difference-time domain (2D-FDTD method. With the fundamental EH-polarized mode of the SOI rib waveguide with a total rib height of 10 μm, an outside rib height of 5 μm and a rib width of 2.5 μm at the operating wavelength of 1550 nm, when the length of the sensitive window in the MZI configuration is 10 mm, a homogeneous sensitivity of 7296.6%/refractive index unit (RIU is obtained. Supposing the resolutions of the photoelectric detectors connected to the output ports are 0.2%, the MZI sensor can achieve a detection limit of 2.74 × 10−6 RIU. Due to high coupling efficiency of SOI rib waveguide with large cross section with standard single-mode glass optical fiber, the proposed MZI sensing platform can be conveniently integrated with optical fiber communication systems and (opto- electronic systems, and therefore has the potential to realize remote sensing, in situ real-time detecting, and possible applications in the internet of things.

  8. Comparison of the Analgesic Effect of Intravenous Acetaminophen and Morphine Sulfate in Rib Fracture; a Randomized Clinical Trial

    OpenAIRE

    Mehrdad Esmailian; Roshanak Moshiri; Majid Zamani

    2015-01-01

    Introduction: Rib fracture is one of the common causes of trauma disabilities in many events and the outcome of these patients are very extensive from temporary pain management to long-term significant disability. Control and management of the pain in such patients is one of the most important challenges in emergency departments. Thus, the aim of the present study was assessing the efficacy of IV acetaminophen in pain control of patients with rib fracture. Methods: In this double-blind study,...

  9. Fabrication procedure effects on fatigue resistance of rib -to-deck welded joints of steel orthotropic bridge decks

    OpenAIRE

    Sim, Hyoung-Bo

    2010-01-01

    Orthotropic steel bridge decks have been widely used for long- and medium-span bridges due to excellent structural characteristics. However, orthotropic decks have experienced various fatigue problems, resulting from high cyclic stresses in conjunction with inadequate welding details. In particular, crack at rib-to-deck welded joints due to wheel load is a concern because inspection and repair of the back side of this weld for closed ribs is not practical due to lack of access. Fatigue resist...

  10. Evaluation of the iPhone with an acrylic sleeve versus the Scoliometer for rib hump measurement in scoliosis

    OpenAIRE

    Izatt Maree T; Bateman Gary R; Adam Clayton J

    2012-01-01

    Abstract Background Vertebral rotation found in structural scoliosis contributes to trunkal asymmetry which is commonly measured with a simple Scoliometer device on a patient's thorax in the forward flexed position. The new generation of mobile 'smartphones' have an integrated accelerometer, making accurate angle measurement possible, which provides a potentially useful clinical tool for assessing rib hump deformity. This study aimed to compare rib hump angle measurements performed using a Sm...

  11. Mach-Zehnder Interferometer Biochemical Sensor Based on Silicon-on-Insulator Rib Waveguide with Large Cross Section.

    Science.gov (United States)

    Yuan, Dengpeng; Dong, Ying; Liu, Yujin; Li, Tianjian

    2015-01-01

    A high-sensitivity Mach-Zehnder interferometer (MZI) biochemical sensing platform based on Silicon-in-insulator (SOI) rib waveguide with large cross section is proposed in this paper. Based on the analyses of the evanescent field intensity, the mode polarization and cross section dimensions of the SOI rib waveguide are optimized through finite difference method (FDM) simulation. To realize high-resolution MZI read-out configuration based on the SOI rib waveguide, medium-filled trenches are employed and their performances are simulated through two-dimensional finite-difference-time domain (2D-FDTD) method. With the fundamental EH-polarized mode of the SOI rib waveguide with a total rib height of 10 μm, an outside rib height of 5 μm and a rib width of 2.5 μm at the operating wavelength of 1550 nm, when the length of the sensitive window in the MZI configuration is 10 mm, a homogeneous sensitivity of 7296.6%/refractive index unit (RIU) is obtained. Supposing the resolutions of the photoelectric detectors connected to the output ports are 0.2%, the MZI sensor can achieve a detection limit of 2.74 × 10(-6) RIU. Due to high coupling efficiency of SOI rib waveguide with large cross section with standard single-mode glass optical fiber, the proposed MZI sensing platform can be conveniently integrated with optical fiber communication systems and (opto-) electronic systems, and therefore has the potential to realize remote sensing, in situ real-time detecting, and possible applications in the internet of things. PMID:26343678

  12. Absence of scalenus anterior muscle.

    OpenAIRE

    Murakami S; Horiuchi K; Yamamoto C; Ohtsuka A; Murakami T.

    2003-01-01

    A rare anomaly of the scalenus muscles is described. In this case, the right scalenus anterior muscle was absent. As a substitute for this muscle, some aberrant muscle slips arose from the lower vertebrae and descended in front of the ventral rami of the lower cervical nerves. These aberrant slips then ran between the ventral rami of the the eighth cervical and first thoracic nerves, and were fused with the right scalenus medius muscle. Thus, the subclavian artery and vein ran in front of the...

  13. Lesiones del ligamento cruzado anterior

    OpenAIRE

    Alejandro Álvarez López; Yenima García Lorenzo

    2015-01-01

    Fundamento: el ligamento cruzado anterior desempeña un papel muy importante en la estabili-dad de la rodilla. La incidencia de esta afección es alta en pacientes que practican deportes de contacto y de no ser tratados de forma adecuada, los resultados son desfavorables. Objetivo: profundizar en los factores necesarios para el tratamiento adecuado de enfermos con esta lesión y evitar las complicaciones. Método: se realizó una revisión bibliográfica de un total de 300 artículos publicados en Pu...

  14. Numerical Simulation and Observational Analysis of the Bora of Pag's Ribs

    Science.gov (United States)

    Trošić, Tanja; Trošić, Živko

    2010-02-01

    The severe bora case that lasted from 13 to 15 November 2004 has been selected for the analysis of the bora of Pag’s ribs, which occurs in the northern part of the eastern Adriatic coast over the Pag island area (Croatia). According to the measurements from automatic stations, the MM5 numerical model is successful in the 10-min mean wind speed prediction at 10-m height. The vertical analysis of the wind speed and potential temperature also gave satisfactory results. At the commencement of the bora the modelled wind had a magnitude of 20ms-1 at 10-m height in the Pag island area, which sharply attenuated in the cross direction and to the open sea. In this way the model has proved successful in predicting the characteristics of the bora of Pag’s ribs. Potential vorticity (PV) at 600m has lower values within PV banners than during the developed bora. The consequence is a strong jet emanating from the nearest gap. The vertical cross-sections through the centre of the gap point out a permanent hydraulic-like flow. At the time of the bora of Pag’s ribs the highest modelled turbulent kinetic energy is found in the jump-like region above the inversion and within the boundary layer along the lower boundary, ranging from 6-8m2 s-2. It is concluded that the dissipation in the hydraulic jumps and the wave breaking regions are the reasons for PV generation.

  15. Hybrid RANS/LES of turbulent flow in a rotating rib-roughened channel

    Science.gov (United States)

    Xun, Qian-Qiu; Wang, Bing-Chen

    2016-07-01

    In this paper, we investigate the effect of the Coriolis force on the flow field in a rib-roughened channel subjected to either clockwise or counter-clockwise system rotation using hybrid RANS/LES based on wall modelling. A simplified dynamic forcing scheme incorporating backscatter is proposed for the hybrid simulation approach. The flow is characterized by a Reynolds number of Re = 1.5 × 104 and a rotation number Ro ranging from -0.6 to 0.6. The mean flow speed and turbulence level near the roughened wall are enhanced under counter-clockwise rotation and suppressed under clockwise rotation. The Coriolis force significantly influences the stability of the wall shear layer and the free shear layers generated by the ribs. Consequently, it is interesting to observe that the classification of the roughness type relies not only on the pitch ratio, but also on the rotation number in the context of rotating rib-roughened flows. In order to validate the present hybrid approach, the first- and second-order statistical moments of the velocity field obtained from the simulations are thoroughly compared with the available laboratory measurement data.

  16. Desmoplastic fibroma of the rib with cystic change: a case report and literature review

    International Nuclear Information System (INIS)

    Desmoplastic fibroma (DF) is a rare, locally aggressive, solitary tumor microscopically composed of well-differentiated myofibroblasts with abundant dense collagen deposition. The most common sites are the long tubular bones and mandible. To our knowledge, only five cases of DF in the ribs have been reported. Here, we report a case of DF in this rare location with unusual radiological findings. A 40-year-old man presented with a 4-year history of swelling of the right chest wall. Radiographs revealed a mass at the right 9th rib, and computed tomography demonstrated a mass of 14 x 12 x 8 cm at the right 9th rib with expanded cystic change and marked calcification that appeared to have arisen from the bone. Open biopsy suggested DF. Total excision was performed, and the chest wall was reconstructed. The surgical specimen was a yellowish tumor with multilocular cystic change containing a viscous liquid. The tumor was composed of a proliferation of less-atypical spindle-shaped cells in a collagenous background. The cystic change was observed in the extra-osseous lesion. No β-catenin cytoplasmic/nuclear accumulation was detected, and no β-catenin or GNAS genetic mutations were detected. A final diagnosis of DF was made on the basis of the pathological and radiological findings. The patient was successfully treated with total excision of the tumor with no evidence of recurrence 6 months after surgery. (orig.)

  17. Desmoplastic fibroma of the rib with cystic change: a case report and literature review

    Energy Technology Data Exchange (ETDEWEB)

    Okubo, Taketo [Juntendo University, Department of Orthopaedic Surgery, School of Medicine, Tokyo (Japan); Juntendo University, Department of Human Pathology, School of Medicine, Bunkyo-ku, Tokyo (Japan); Saito, Tsuyoshi [Juntendo University, Department of Human Pathology, School of Medicine, Bunkyo-ku, Tokyo (Japan); Takagi, Tatsuya; Suehara, Yoshiyuki; Kaneko, Kazuo [Juntendo University, Department of Orthopaedic Surgery, School of Medicine, Tokyo (Japan)

    2014-05-15

    Desmoplastic fibroma (DF) is a rare, locally aggressive, solitary tumor microscopically composed of well-differentiated myofibroblasts with abundant dense collagen deposition. The most common sites are the long tubular bones and mandible. To our knowledge, only five cases of DF in the ribs have been reported. Here, we report a case of DF in this rare location with unusual radiological findings. A 40-year-old man presented with a 4-year history of swelling of the right chest wall. Radiographs revealed a mass at the right 9th rib, and computed tomography demonstrated a mass of 14 x 12 x 8 cm at the right 9th rib with expanded cystic change and marked calcification that appeared to have arisen from the bone. Open biopsy suggested DF. Total excision was performed, and the chest wall was reconstructed. The surgical specimen was a yellowish tumor with multilocular cystic change containing a viscous liquid. The tumor was composed of a proliferation of less-atypical spindle-shaped cells in a collagenous background. The cystic change was observed in the extra-osseous lesion. No β-catenin cytoplasmic/nuclear accumulation was detected, and no β-catenin or GNAS genetic mutations were detected. A final diagnosis of DF was made on the basis of the pathological and radiological findings. The patient was successfully treated with total excision of the tumor with no evidence of recurrence 6 months after surgery. (orig.)

  18. Characteristics of entropy generation and heat transfer in a microchannel with fan-shaped reentrant cavities and internal ribs

    Institute of Scientific and Technical Information of China (English)

    XIA; GuoDong; ZHAI; YuLing; CUI; ZhenZhen

    2013-01-01

    Three-dimensional laminar fluid flow and heat transfer in a micro heat sink with cavities and internal ribs are investigated us-ing numerical methods. Moreover, according to the second law of thermodynamics, the model of entropy generation is also established for variable cross section of the microchannel. The simulation encompasses Reynolds number of 198-600, relative cavity height e1/Dhvalues of 0-0.65, relative rib height e2/Dhrange of 0-0.2167. The results show that the effect of relative rib height on entropy generation is significant, while the relative cavity height has little effect on it. The combined effect of cavities and ribs in the microchannel has better performance of heat transfer than the smooth microchannel under similar conditions. Extensive simulations are conducted to collect data on the characteristics of heat transfer and fluid flow in a micro heat sink with cavities and internal ribs. Using these data, correlations for Nusselt number and friction factor in terms of Reynolds number and the geometry of cavity and rib have been developed.

  19. The red-eared slider turtle carapace under fatigue loading: The effect of rib-suture arrangement.

    Science.gov (United States)

    Achrai, Ben; Daniel Wagner, H

    2015-08-01

    Biological structures consisting of strong boney elements interconnected by compliant but tough collagenous sutures are abundantly found in skulls and shells of, among others, armadillos, alligators, turtles and more. In the turtle shell, a unique arrangement of alternating rigid (rib) and flexible (suture) elements gives rise to superior mechanical performance when subjected to low and high strain-rate loadings. However, the resistance to repeated load cycling - fatigue - of the turtle shell has yet to be examined. Such repeated loading could approximately simulate the consecutive high-stress bending loads exerted during (a predator) biting or clawing. In the present study flexural high-stress cyclic loads were applied to rib and suture specimens, taken from the top dorsal part of the red-eared slider turtle shell, termed carapace. Subsequently, to obtain a more complete and integrated fatigue behavior of the carapace, specimens containing a complex alternating rib-suture-rib-suture-rib configuration were tested as well. Although the sutures were found to be the least resistant to repeated loads, a synergistic effect was observed for the complex specimens, displaying improved fatigue durability compared to the individual (suture or even rib) constituents. This study may assist in the design of future high-stress fatigue-resistant materials incorporating complex assemblies of rigid and flexible elements. PMID:26042699

  20. Rib fracture after stereotactic radiotherapy on follow-up thin-section computed tomography in 177 primary lung cancer patients

    International Nuclear Information System (INIS)

    Chest wall injury after stereotactic radiotherapy (SRT) for primary lung cancer has recently been reported. However, its detailed imaging findings are not clarified. So this study aimed to fully characterize the findings on computed tomography (CT), appearance time and frequency of chest wall injury after stereotactic radiotherapy (SRT) for primary lung cancer A total of 177 patients who had undergone SRT were prospectively evaluated for periodical follow-up thin-section CT with special attention to chest wall injury. The time at which CT findings of chest wall injury appeared was assessed. Related clinical symptoms were also evaluated. Rib fracture was identified on follow-up CT in 41 patients (23.2%). Rib fractures appeared at a mean of 21.2 months after the completion of SRT (range, 4 -58 months). Chest wall edema, thinning of the cortex and osteosclerosis were findings frequently associated with, and tending to precede rib fractures. No patients with rib fracture showed tumors > 16 mm from the adjacent chest wall. Chest wall pain was seen in 18 of 177 patients (10.2%), of whom 14 patients developed rib fracture. No patients complained of Grade 3 or more symptoms. Rib fracture is frequently seen after SRT for lung cancer on CT, and is often associated with chest wall edema, thinning of the cortex and osteosclerosis. However, related chest wall pain is less frequent and is generally mild if present

  1. Study of the temperature rise induced by a focusing transducer with a wide aperture angle on biological tissue containing ribs

    Science.gov (United States)

    Xin, Wang; Jiexing, Lin; Xiaozhou, Liu; Jiehui, Liu; Xiufen, Gong

    2016-04-01

    We used the spheroidal beam equation to calculate the sound field created by focusing a transducer with a wide aperture angle to obtain the heat deposition, and then we used the Pennes bioheat equation to calculate the temperature field in biological tissue with ribs and to ascertain the effects of rib parameters on the temperature field. The results show that the location and the gap width between the ribs have a great influence on the axial and radial temperature rise of multilayer biological tissue. With a decreasing gap width, the location of the maximum temperature rise moves forward; as the ribs are closer to the transducer surface, the sound energy that passes through the gap between the ribs at the focus decreases, the maximum temperature rise decreases, and the location of the maximum temperature rise moves forward with the ribs. Project supported by the National Basic Research Program of China (Grant Nos. 2012CB921504 and 2011CB707902), the National Natural Science Foundation of China (Grant No. 11274166), the Fundamental Research Funds for the Central Universities, China (Grant No. 020414380001), the Fund from State Key Laboratory of Acoustics, Chinese Academy of Sciences (Grant No. SKLA201401), China Postdoctoral Science Foundation (Grant No. 2013M531313), and the Priority Academic Program Development of Jiangsu Higher Education Institutions and SRF for ROCS, SEM.

  2. Anterior chest wall examination reviewed

    Directory of Open Access Journals (Sweden)

    F. Trotta

    2011-09-01

    Full Text Available Anterior chest wall involvement is not infrequently observed within inflammatory arthropaties, particularly if one considers seronegative spondiloarthritides and SAPHO syndrome. Physical examination is unreliable and conventional X-rays analysis is an unsatisfactory tool during diagnostic work-up of this region. Scintigraphic techniques yield informations both on the activity and on the anatomical extent of the disease while computerized tomography visualize the elementary lesions, such as erosions, which characterize the process. Moreover, when available, magnetic resonance imaging couple the ability to finely visualize such lesions with the possibility to show early alterations and to characterize the “activity” of the disease, presenting itself as a powerful tool both for diagnosis and follow-up. This review briefly shows the applications of imaging techniques for the evaluation of the anterior chest wall focusing on what has been done in the SAPHO syndrome which can be considered prototypical for this regional involvement since it is the osteo-articular target mainly affected by the disease.

  3. Dolor anterior de la rodilla

    Directory of Open Access Journals (Sweden)

    Alejandro Álvarez López

    2010-01-01

    Full Text Available Introducción:el dolor anterior de la rodilla constituye una importante causa de consulta en la especialidad de Ortopedia y Traumatología. La incidencia de otras enfermedades relacionadas con este síntoma es cada vez mayor, ejemplo de ello es la condromalacia de rótula, tendinitis patelar, osteoartritis patelofemoral entre otras, el diagnóstico de estas enfermedades se debe al cúmulo de experiencia y a la introducción de técnicas y equipos imagenológicos de avanzada. Desarrollo: se realizó una revisión bibliográfica sobre el dolor anterior de la rodilla, con especial énfasis en las teorías involucradas en su fisiopatología, entre las que se encuentran la mala-alineación patelo-femoral, equilibrio de la homeostasis tisular y aumento de la presión intra-ósea, además de brindar brevemente el cuadro clínico de la enfermedad. Para finalizar se expone el enfoque terapéutico que se basa fundamentalmente en el tratamiento conservador, se mencionan además las modalidades de tratamiento quirúrgico.

  4. Manufacturing and assembly of IWS support RIB and lower bracket for ITER vacuum vessel

    International Nuclear Information System (INIS)

    ITER Vacuum Vessel (VV) is made of double walls connected by ribs structure and flexible housings, space between these walls is filled up with In Wall Shielding (IWS) blocks to shield neutrons streaming out of plasma and reduce toroidal magnetic field ripple. These blocks will be connected to the VV through a supporting structure of Support Rib (SR) and Lower Bracket (LB) assembly. SR and LB are two independent components manufactured from SS316L (N)-IG material using water jet cutting followed by CNC machining. Water jet cutting is used to prevent Heat Affected Zone, while CNC machining is required to meet the desired surface roughness. Total 1584 support ribs and 3168 lower bracket of different sizes and shapes will be manufactured for the IWS. Two lower brackets will be welded with one support rib to make an assembly. The welding between SR and LB is a full penetration welding by combining Tungsten Inert Gas (TIG) welding and Shielded Metal Arc Welding (SMAW). K type weld joint has been selected for assembly to minimise the welding distortion and a unique welding fixture has been designed to facilitate this weld joint. This unique fixture has an arrangement of rotation of assembly and maintaining appropriate flow of purging gas (Argon) to minimise the welding defects and distortion. Total 1584 assemblies of different sizes and shapes will be manufactured within fastened tolerance to support IWS blocks in the VV. Various mock ups have been manufactured to establish and validate the manufacturing processes, welding and inspection procedures. Process qualification documents (WPS, PQR and WPQR) have been developed. With sufficient experience gained from manufacturing and testing of mock ups, final manufacturing of IWS support rib and lower bracket has been started at the site of IWS manufacturer M/s. Avasarala Technologies Limited, India. This paper will describe, optimization of water jet cutting speed on IWS material, selection criteria for K type weld joint

  5. Positioning of anterior teeth in removable dentures

    Directory of Open Access Journals (Sweden)

    Strajnić Ljiljana

    2002-01-01

    Full Text Available Introduction The aim of this paper was to present methods of placement of artificial anterior teeth in edentulous individuals. The following review takes account of the majority of papers published during the last 100 years. The review has been divided into sections regarding the method used to determine the position of artificial anterior teeth. Geometric aspect Gysi (1895-1920 produced the first scientific theory about the position of artificial anterior teeth. Physiognomic theory The aim of this theory is to find the most natural position for artificial anterior teeth for each individual. Camper's "face angle" as a physiognomic criterion, has been introduced in papers of Wehrli (1961, Marxhors (1966, Tanzer (1968, Lombardi (1973. Esthetic aspect Important names in the field of dental esthetics are: Schön and Singer (1961, Arnheim (1965, Krajiček (1969, Tanzer (1968, Lombardi (1973, Goldstein (1976. They have introduced principles of visual aspects for selection of contours, dimension and position of artificial anterior teeth. Constitution aspect Flagg (1880, Williams (1913 and Hrauf (1957, 1958, have considered body constitution and individual characteristics regarding position of artificial anterior teeth. Physiological theory In 1971, Marxhors pointed to the fact that the position of artificial teeth corresponds with the function of the surrounding soft tissue and from the aspect of physiognomy as well. Phonetic aspect According to Silverman (1962 artificial anterior teeth are nearest when we pronounce the sound "S". Cephalometrical research Rayson (1970, Watson (1989, Strajnić Lj. (1999, Bassi F. (2001 have presented cephalometric radiographic analyses of natural anterior teeth compared with cephalometric radiographic analyses of artificial anterior teeth. A review of dental literature shows several factors suggesting modalities which should determine the position of artificial anterior teeth. Numerous methods have been designed for

  6. Pharyngocutaneous fistula after anterior cervical spine surgery

    OpenAIRE

    Sansur, Charles A.; Early, Stephen; Reibel, James; Arlet, Vincent

    2009-01-01

    Pharyngocutaneous fistulae are rare complications of anterior spine surgery occurring in less than 0.1% of all anterior surgery cases. We report a case of a 19 year old female who sustained a C6 burst fracture with complete quadriplegia. She was treated urgently with a C6 corpectomy with anterior cage and plating followed by posterior cervical stabilization at another institution. Post operatively she developed a pharyngocutaneous fistula that failed to heal despite several attempts of closu...

  7. Herniation of the anterior lens capsule

    Directory of Open Access Journals (Sweden)

    Pereira Nolette

    2007-01-01

    Full Text Available Herniation of the anterior lens capsule is a rare abnormality in which the capsule bulges forward in the pupillary area. This herniation can be mistaken for an anterior lenticonus where both the capsule and the cortex bulge forward. The exact pathology behind this finding is still unclear. We report the clinical, ultrasound biomicroscopy (UBM and histopathological findings of a case of herniation of the anterior lens capsule. UBM helped to differentiate this entity from anterior lenticonus. Light microscopy revealed capsular splitting suggestive of capsular delamination and collection of fluid (aqueous in the area of herniation giving it a characteristic appearance.

  8. Experimental investigation of heat transfer and flow using V and broken V ribs within gas turbine blade cooling passage

    Science.gov (United States)

    Kumar, Sourabh; Amano, R. S.

    2015-05-01

    Gas turbines are extensively used for aircraft propulsion, land-based power generation, and various industrial applications. With an increase in turbine rotor inlet temperatures, developments in innovative gas turbine cooling technology enhance the efficiency and power output; these advancements of turbine cooling have allowed engine designs to exceed normal material temperature limits. For internal cooling design, techniques for heat extraction from the surfaces exposed to hot stream of gas are based on an increase in the heat transfer areas and on the promotion of turbulence of the cooling flow. In this study, an improvement in performance is obtained by casting repeated continuous V- and broken V-shaped ribs on one side of the two pass square channels into the core of the blade. A detailed experimental investigation is done for two pass square channels with a 180° turn. Detailed heat transfer distribution occurring in the ribbed passage is reported for a steady state experiment. Four different combinations of 60° V- and broken 60° V-ribs in a channel are considered. A series of thermocouples are used to obtain the temperature on the channel surface and local heat transfer coefficients are obtained for Reynolds numbers 16,000, 56,000 and 85,000 within the turbulent flow regime. Area averaged data are calculated in order to compare the overall performance of the tested ribbed surface and to evaluate the degree of heat transfer enhancement induced by the rib. Flow within the channels is characterized by heat transfer enhancing ribs, bends, rotation and buoyancy effects. A series of experimental measurements is performed to predict the overall performance of the channel. This paper presents an attempt to collect information about the Nusselt number, the pressure drop and the overall performance of the eight different ribbed ducts at the specified Reynolds number. The main contribution of this study is to evaluate the best combination of rib arrangements

  9. Perawatan Gigitan Terbalik Anterior Dengan Menggunakan Inclined Plane

    OpenAIRE

    Siregar, Wilda A.

    2008-01-01

    Gigitan terbalik anterior adalah suatu anomali posisi gigi anterior atas yang lebih ke lingual dibandingkan gigi anterior bawah. Anomali gigitan terbalik anterior dapat ditemui pada periode gigi sulung, gigi bercampur, dan gigi permanen. Faktor etiologi gigitan terbalik anterior dibedakan atas dental, fungsional atau skeletal. Untuk menentukan etiologi dari anomali gigitan terbalik anterior perlu dilakukan diagnosa yang tepat. Perawatan gigitan terbalik anterior ini dapat dilakukan de...

  10. Absence of scalenus anterior muscle.

    Directory of Open Access Journals (Sweden)

    Murakami S

    2003-06-01

    Full Text Available A rare anomaly of the scalenus muscles is described. In this case, the right scalenus anterior muscle was absent. As a substitute for this muscle, some aberrant muscle slips arose from the lower vertebrae and descended in front of the ventral rami of the lower cervical nerves. These aberrant slips then ran between the ventral rami of the the eighth cervical and first thoracic nerves, and were fused with the right scalenus medius muscle. Thus, the subclavian artery and vein ran in front of the aberrant slips, together with the ventral ramus of the first thoracic nerve. The aberrant muscle slips issued 2 accessory bundles. One bundle ran between the ventral rami of the fourth and fifth cervical nerves and was fused with the scalenus medius muscle; the other bundle ran between the ventral rami of the fifth and sixth cervical nerves and was fused with the scalenus medius muscle.

  11. Toxic Anterior Segment Syndrome (TASS

    Directory of Open Access Journals (Sweden)

    Özlem Öner

    2011-12-01

    Full Text Available Toxic anterior segment syndrome (TASS is a sterile intraocular inflammation caused by noninfectious substances, resulting in extensive toxic damage to the intraocular tissues. Possible etiologic factors of TASS include surgical trauma, bacterial endotoxin, intraocular solutions with inappropriate pH and osmolality, preservatives, denatured ophthalmic viscosurgical devices (OVD, inadequate sterilization, cleaning and rinsing of surgical devices, intraocular lenses, polishing and sterilizing compounds which are related to intraocular lenses. The characteristic signs and symptoms such as blurred vision, corneal edema, hypopyon and nonreactive pupil usually occur 24 hours after the cataract surgery. The differential diagnosis of TASS from infectious endophthalmitis is important. The main treatment for TASS formation is prevention. TASS is a cataract surgery complication that is more commonly seen nowadays. In this article, the possible underlying causes as well as treatment and prevention methods of TASS are summarized. (Turk J Oph thal mol 2011; 41: 407-13

  12. Rib fractures in chronic alcoholic men: Relationship with feeding habits, social problems, malnutrition, bone alterations, and liver dysfunction.

    Science.gov (United States)

    González-Reimers, Emilio; García-Valdecasas-Campelo, Elena; Santolaria-Fernández, Francisco; Milena-Abril, Antonio; Rodríguez-Rodríguez, Eva; Martínez-Riera, Antonio; Pérez-Ramírez, Alina; Alemán-Valls, María Remedios

    2005-10-01

    Rib fractures are common in alcoholics. This high prevalence might be due to ethanol-associated malnutrition, bone disease, liver dysfunction, or the peculiar lifestyle of the alcoholic with frequent trauma and altercations. In this study we try to discern the role of these factors on rib fracture (assessed on a plain thoracic X-ray film) in 81 consecutive alcoholic patients, 25 of them cirrhotics. Serum albumin, prothrombin aspartate aminotransferase (ASAT), alanine aminotransferase (ALAT), gamma-glutamyl transpeptidase, C-terminal cross-linking telopeptide of type 1 collagen, osteocalcin, insulin growth factor 1, 1,25-dihydroxyvitamin D, parathyroid hormone, estradiol, free testosterone, and corticosterone were measured, and the patients also underwent assessment of bone mineral density by a HOLOGIC QDR-2000 bone densitometer (Waltham, MA, USA). Body mass index, triceps skinfold, and brachial perimeter were also determined, and the patients and their families were asked about tobacco consumption, social and familial links, consumption of ethanol by other members of the family, kind of job, and feeding habits. Forty-two male nondrinker sanitary workers of similar age served as controls. Forty of the 81 patients showed rib fractures. There was a statistically significant association between rib fractures and disruption of social and familial links, irregular feeding habits (in bars or pubs, not at home), ethanol consumption by close relatives, and intensity of tobacco consumption, but not between rib fractures and liver function tests, nutritional parameters, or bone mineral density, besides a nearly significant trend (p = .053) with the presence of osteopenia at the femoral neck. Patients with major withdrawal symptoms at admission also presented more frequent rib fractures. We conclude that rib fractures in alcoholics are related to the peculiar lifestyle of these patients rather than to bone alterations, liver dysfunction, or nutritional status. PMID:16584975

  13. Rib Fracture Fixation Restores Inspiratory Volume and Peak Flow in a Full Thorax Human Cadaveric Breathing Model

    Directory of Open Access Journals (Sweden)

    Slobogean

    2015-11-01

    Full Text Available Background Multiple rib fractures cause significant pain and potential for chest wall instability. Despite an emerging trend of surgical management of flail chest injuries, there are no studies examining the effect of rib fracture fixation on respiratory function. Objectives Using a novel full thorax human cadaveric breathing model, we sought to explore the effect of flail chest injury and subsequent rib fracture fixation on respiratory outcomes. Patients and Methods We used five fresh human cadavers to generate negative breathing models in the left thorax to mimic physiologic respiration. Inspiratory volumes and peak flows were measured using a flow meter for all three chest wall states: intact chest, left-sided flail chest (segmental fractures of ribs 3 - 7, and post-fracture open reduction and internal fixation (ORIF of the chest wall with a pre-contoured rib specific plate fixation system. Results A wide variation in the mean inspiratory volumes and peak flows were measured between specimens; however, the effect of a flail chest wall and the subsequent internal fixation of the unstable rib fractures was consistent across all samples. Compared to the intact chest wall, the inspiratory volume decreased by 40 ± 19% in the flail chest model (P = 0.04. Open reduction and internal fixation of the flail chest returned the inspiratory volume to 130 ± 71% of the intact chest volumes (P = 0.68. A similar 35 ± 19% decrease in peak flows was seen in the flail chest (P = 0.007 and this returned to 125 ± 71% of the intact chest following ORIF (P = 0.62. Conclusions Negative pressure inspiration is significantly impaired by an unstable chest wall. Restoring mechanical stability of the fractured ribs improves respiratory outcomes similar to baseline values.

  14. Mild toxic anterior segment syndrome mimicking delayed onset toxic anterior segment syndrome after cataract surgery

    Directory of Open Access Journals (Sweden)

    Su-Na Lee

    2014-01-01

    Full Text Available Toxic anterior segment syndrome (TASS is an acute sterile postoperative anterior segment inflammation that may occur after anterior segment surgery. I report herein a case that developed mild TASS in one eye after bilateral uneventful cataract surgery, which was masked during early postoperative period under steroid eye drop and mimicking delayed onset TASS after switching to weaker steroid eye drop.

  15. Totally thrombosed giant anterior communicating artery aneurysm

    Directory of Open Access Journals (Sweden)

    V R Roopesh Kumar

    2015-01-01

    Full Text Available Giant anterior communicating artery aneurysmsarerare. Apatient presented with visual dysfunction, gait ataxia and urinary incontinence. MRI showed a giant suprasellar mass.At surgery, the lesion was identified as being an aneurysm arising from the anterior communicating artery.The difficulty in preoperative diagnosis and relevant literature are reviewed.

  16. Anterior capsular rupture following blunt ocular injury

    OpenAIRE

    Gremida, Anas; Kassem, Iris; Traish, Aisha

    2011-01-01

    A 10-year-old boy suffered a large, oblique anterior capsular tear following blunt injury to his right eye. The boy was followed daily for hyphema resolution and progressive traumatic cataract formation. After the hyphema had resolved, the lens was removed using an anterior approach and an intraocular lens was placed with excellent visual outcome.

  17. Dentulous Appliance for Upper Anterior Edentulous Span

    OpenAIRE

    Chalakkal, Paul; Devi, Ramisetty Sabitha; Srinivas, G Vijay; Venkataramana, Pammi

    2013-01-01

    This article discusses about a fixed dentulous appliance that was constructed to replace the primary upper anterior edentulous span in a four year old girl. It constituted a design, whereby the maxillary primary second molars were used to support the appliance through bands and a wire that contained an acrylic flange bearing trimmed acrylic teeth, anteriorly. The appliance was functionally and aesthetically compliant.

  18. Anterior cervical hypertrichosis: a sporadic case.

    Science.gov (United States)

    Bostan, Sezen; Yaşar, Şirin; Serdar, Zehra Aşiran; Gizlenti, Sevda

    2016-03-01

    Anterior cervical hypertrichosis is a very rare form of primary localized hypertrichosis. It consists of a tuft of terminal hair on the anterior neck just above the laryngeal prominence. The etiology is still unknown. In this article, we reported a 15-year-old female patient who presented to our clinic with a complaint of hypertrichosis on the anterior aspect of the neck for the last five years. Her past medical history revealed no pathology except for vesicoureteral reflux. On the basis of clinical presentation, our patient was diagnosed with anterior cervical hypertrichosis and she was considered to be a sporadic case due to lack of other similar cases in familial history. To date, 33 patients with anterior cervical hypertrichosis have been reported. Anterior cervical hypertrichosis can be associated with other abnormalities, but it frequently presents as an isolated defect (70%). The association of vesicoureteral reflux and anterior cervical hypertrichosis which was observed in our patient might be coincidental. So far, no case of anterior cervical hypertrichosis associated with vesicoureteral reflux has been reported in the literature. PMID:27103865

  19. Multi-detector thoracic CT findings in cerebro-costo-mandibular syndrome: rib gaps and failure of costo-vertebral separation

    Energy Technology Data Exchange (ETDEWEB)

    Watson, Tom Anthony; Arthurs, Owen John; Calder, Alistair Duncan [Great Ormond Street Hospital for Children NHS Foundation Trust, Department of Radiology, London (United Kingdom); Muthialu, Nagarajan [Great Ormond Street Hospital for Children NHS Foundation Trust, Department of Cardiothoracic surgery, London (United Kingdom)

    2014-02-15

    Cerebro-costo-mandibular syndrome (CCMS) describes a triad of mandibular hypoplasia, brain dysfunction and posterior rib defects (''rib gaps''). We present the CT imaging for a 2-year-old girl with CCMS that highlights the rib gap defects and shows absent transverse processes with abnormal fusion of the ribs directly to the vertebral bodies. We argue that this is likely to relate to abnormal lateral sclerotome development in embryology, with the failure of normal costo-vertebral junctions compounding impaired thoracic function. The case also highlights the use of CT for specific indications in skeletal dysplasia. (orig.)

  20. Visual evaluation of rib shadow and lung marking during high-voltage chest radiography

    International Nuclear Information System (INIS)

    Visual evaluation of rib shadow and lung marking during high voltage chest radiography. The purpose of this study is to improvement of visual discrimination of pulmonary structures on the conventional chest radiogram. The author prepared an artificial lung using an acryl plate, 8 cm in thickness, which is nearly equivalent to human lung, and 0.6 cm thickness of an aluminum plate for an artificial rib, and 0.5 cm of an acryl plate as a pulmonary vessel as well. And they were used as objects for experimental radiograms. This study performed with gradual increasing densities of film bases in the sequences of densities of 0.6, 0.9, 1.1 and 1.3. We made two combinations of images after multiple and regular cuts, with width of 1 cm, of 4 radiograms at the above mentioned densities of film bases. One image consisted of alternative combination of radiograms taken at densities of 0.6 and 1.3, and the other did at 0.9 and 1.1. The latter image provided better visual perception of pulmonary structures than the former. Experimental radiograms were also taken with 60 kV and 120 kV respectively. After careful evaluation and comparison to images taken on varieties of different densities with combinations and kV, the author had a conclusion that it is advisable to use a high kV X-ray which makes rib shadow subtle, for better visual delineation of pulmonary structures behind ribcage, even though contrast of pulmonary structures are decreased at high kV radiogram

  1. The clinical significance of adjacent rib involvement on MRI in patients with acute osteoporotic compression fractures of the thoracic spine

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyun Joo; Kim, Jae Hyun; Kwon, Kui Hyang; Choi, Deuk Lin; Goo, Dong Erk; Suh, You Sung [Soonchunhyang Univ. Seoul Hospital/Soonchunhyang Univ. College of Medicine, Seoul (Korea, Republic of); Bae, Won Kyung [Soonchunhyang Univ. Cheonan Hospital/Soonchunhyang Univ. College of Medicine, Cheonan (Korea, Republic of)

    2012-05-15

    The purpose of this study was to evaluate the significance of the presence of adjacent rib involvement in osteoporotic compression fractures. All the patients with acute osteoporotic compression fractures of the thoracic spine on thoracic spine MRI that presented to our clinic between September 2003 and January 2010 were retrospectively reviewed. All the vertebrae were divided into two groups: those that showed signal intensity change in the rib adjacent to the compression fracture and those that did not. We compared the results between the two groups to determine if there were differences in the degree of osteoporosis, the compression fracture level and the age of patients between the two groups. We calculated the degree of correlation between the MRI and the bone scan images of these patients. We also reviewed whether percutaneous vertebroplasty relieved symptoms or not. Signal intensity changes were found in the adjacent rib(s) in 12 of the 60 patients and in 14 of the 94 levels (the total number of levels). The MRI and bone scan showed significant correlation (p < 0.001). There was a statistically significant difference in the incidence of pain at the one month outpatient follow up between the two groups (p = 0.0215). The radiologist should comment on the presence or absence of adjacent rib involvement when reporting on the thoracic spine MRI of patients suffering from osteoporotic compression fractures in order to more accurately determine prognosis.

  2. Position and Thickness Optimization of Ribs for Ventilation Covering Using the Micro Genetic Algorithm with an Interpolated Smooth Objective Function

    Directory of Open Access Journals (Sweden)

    Young-Doo Kwon

    2015-01-01

    Full Text Available Structures with supporting ribs are adopted in many fields of engineering. These ribs are attached to the main plate or shell to increase stiffness and reduce the stresses of a structure. Currently, much research in structural optimization has been devoted to size or thickness optimizations. In this study, the discrete positions of the ribs of a structure are optimized in addition to their thicknesses. The objective function, which is the total weight of a structure, is a continuous function with respect to the thickness of the ribs. However, it is a stepwise function of a dimensionless variable, which represents the set of positions of the ribs. Because of this stepwise objective function, the gradient method of optimization is not applicable. Therefore, we applied the micro genetic algorithm (MGA, which does not need derivatives of the objective function. To accelerate the rate of convergence, the stepwise objective function is interpolated to a smooth artificial objective function that does not alter the optimal solution.

  3. Biaxial creep behavior of ribbed GCFR cladding at 650/sup 0/C in nominally pure helium (99. 99%)

    Energy Technology Data Exchange (ETDEWEB)

    Yaggee, F. L.; Purohit, A.; Grajek, W. J.; Peoppel, R. B.

    1977-11-01

    Biaxial creep-rupture tests were conducted on 12 prototypic GCFR fuel-cladding specimens at 650/sup 0/C and a nominal hoop stress of 241.3 MPa. All test specimens were fabricated from 20% cold-worked Type 316 stainless steel tubes that were ribbed on the outer surface by mechanical grinding or electro-chemical etching. Test variables included specimen length and the presence or absence of weld-reinforcing end collars. Test results have indicated that, compared with data on smooth specimens, ribbing has no detrimental effect on creep-rupture lifetime. Specimens fabricated from tubes ribbed by electrochemical etching exhibit a significantly shorter creep-rupture lifetime and a higher secondary (steady-state) creep rate than specimens fabricated from tubes ribbed by mechanical grinding. Specimen length does not strongly affect creep-rupture lifetime, but the presence of an end collar does exhibit a significant influence on both the axial strain profile and the ratio of maximum diametral strain at the failure site to average diametral strain away from the failure site. The ribs do not inhibit the propagation of fissure or rupture failures.

  4. Study on critical heat flux in narrow rectangular channel with repeated-rib roughness. 1. Experimental facility and preliminary experiments

    Energy Technology Data Exchange (ETDEWEB)

    Kinoshita, Hidetaka; Terada, Atsuhiko; Kaminaga, Masanori; Hino, Ryutaro [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    2001-10-01

    In the design of a spallation target system, the water cooling system, for example a proton beam window and a safety hull, is used with narrow channels, in order to remove high heat flux and prevent lowering of system performance by absorption of neutron. And in narrow channel, heat transfer enhancement using 2-D rib is considered for reduction the cost of cooling component and decrease inventory of water in the cooling system, that is, decrease of the amount of irradiated water. But few studies on CHF with rib have been carried out. Experimental and analytical studies with rib-roughened test section, in 10:1 ratio of pitch to height, are being carried out in order to clarify the CHF in rib-roughened channel. This paper presents the review of previous researches on heat transfer in channel with rib roughness, overview of the test facility and the preliminary experimental and analytical results. As a result, wall friction factors were about 3 times as large as that of smooth channel, and heat transfer coefficients are about 2 times as large as that of smooth channel. The obtained CHF was as same as previous mechanistic model by Sudo. (author)

  5. INFLUENCE OF HOUSING RIBBING MODIFICATION ON FREQUENCIES AND SHAPES OF VIBRATIONS

    Directory of Open Access Journals (Sweden)

    Piotr FOLĘGA

    2014-03-01

    Full Text Available In article an experimental and theoretical modal analysis of selected structural solutions of housings gear was carried out. Results of the examinations enabled to determine a rate of FEM modal parameters conformity with parameters of actual objects by determination of MAC ratio value. Basing on obtained results of the experimental modal analysis, the numerical models of housings were fine tuned. The obtained conformity of the results of experimental and theoretical modal analysis of examined housings’ solutions enabled to ascertain the correctness of prepared FEM models. The executed modal analysis of various housing versions enabled to estimate influence of made ribbing modifications on form and frequency of its own vibrations.

  6. Development of a high power VHF CW transmitter for RIB programme

    International Nuclear Information System (INIS)

    SAMEER has been entrusted with the responsibility of developing a high power VHF MOPA transmitter for use in the RIB programme of VECC, Kolkata.The transmitter is capable of operating in both CW and pulsed RF mode. Low power RF subsystems, such as level controller and phase controller, ensure smooth control and good stability over power level and relative phase of the output signal. As, at a future date, multiple transmitters are to be operated using the same stable source, phase control of individual transmitter is absolutely essential

  7. Low-loss rib waveguides containing Si nanocrystals embedded in SiO2

    OpenAIRE

    Pellegrino, Paolo; Garrido Fernández, Blas; García Favrot, Cristina; Arbiol i Cobos, Jordi; Morante i Lleonart, Joan Ramon; Melchiorri, Mirko; Daldosso, Nicola; Pavesi, Lorenzo; Scheid, E; Sarrabayrouse, G.

    2005-01-01

    We report on the study and modeling of the structural and optical properties of rib-loaded waveguides working in the 600-900-nm spectral range. A Si nanocrystal (Si-nc) rich SiO2 layer with nominal Si excess ranging from 10% to 20% was produced by quadrupole ion implantation of Si into thermal SiO2 formed on a silicon substrate. Si-ncs were precipitated by annealing at 1100°C, forming a 0.4-um-thick core layer in the waveguide. The Si content, the Si-nc density and size, the Si-nc emission, a...

  8. The design of a radio frequency quadrupole LINAC for the RIB project at VECC Kolkata

    Indian Academy of Sciences (India)

    V Banerjee; Alok Chakrabarti; Arup Bandyopadhyay; T K Bhaumik; M Mondal; T K Chakraborty; H Pande; O Kamigaito; A Goto; Y Yano

    2002-12-01

    A radio frequency quadrupole LINAC has been designed for the VECC-RIB project for an input beam energy of 1.0 keV/u and / ≥ 1/16. The output energy will be about 90 keV/u for a 3.4 m long, 35 MHz structure. A half-scale cold model of the RFQ has been fabricated and tested for rf structure design study. The beam dynamics and rf-structure design along with the results of the cold model tests will be presented.

  9. Heat transfer performance of the thermal entrance region of the narrow ribbed-surface channel

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Akira; Kaminaga, Masanori; Hino, Ryutaro [Center for Neutron Science, Tokai Research Establishment, Japan Atomic Energy Research Institute, Tokai, Ibaraki (Japan); Kanamaru, Nobuhisa; Sudo, Yukio

    1999-02-01

    The heat transfer argumentation in the thermal entrance region of a narrow rectangular channel roughened with repeated ribs was investigated experimentally for removing high-density heat generated in a solid target. This solid target works as a spallation neutron source coupled with a proton beam accelerator of 1.5 MW power. Experimental results showed that the thermal entrance region could extent to the range of 50-60 times as long as the equivalent diameter from the coolant inlet, and that the heat transfer coefficient in the region could be estimated with the Gnielinski`s correlation. (author)

  10. Parameter survey of a rib stiffened wooden floor using sinus modes model

    DEFF Research Database (Denmark)

    Sjökvist, Lars-Göran; Brunskog, Jonas; Jacobsen, Finn

    2008-01-01

    the sound insulation for lightweight buildings have the possibility to speed up the development of new techniques and in the end give tenants better quality of life. This study uses Fourier sinus series to calculate the vibrations on a rib stiffened plate. The beams are modelled as line forces and...... moments that reacts onto the plate vibrations. A parameter study is performed with the aim to identify the most important parameters and their behaviour. The preliminary results show that the attenuation of the system is by far most evident in the direction across the beams. The influence from the basic...

  11. Assessment by imaging of Iscan's method on aging of the fourth rib in forensic

    OpenAIRE

    Ramos Bruach, Marc

    2013-01-01

    [ANGLÈS] Iscan's method (1984) is the analysis of the sternal end cavity of the human fourth rib. In this project we will compute the shape descriptors described in his work with advanced image processing tools and try to automate the process to avoid some of the difficulties the forensics have to deal with every time. The measurements are done at pixel level using Matlab. Looking at its size, profundity, irregularity and circularity we get those shape descriptors and run the statistical anal...

  12. Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage.

    Science.gov (United States)

    Bruno, Alexander G; Bouxsein, Mary L; Anderson, Dennis E

    2015-08-01

    We developed and validated a fully articulated model of the thoracolumbar spine in opensim that includes the individual vertebrae, ribs, and sternum. To ensure trunk muscles in the model accurately represent muscles in vivo, we used a novel approach to adjust muscle cross-sectional area (CSA) and position using computed tomography (CT) scans of the trunk sampled from a community-based cohort. Model predictions of vertebral compressive loading and trunk muscle tension were highly correlated to previous in vivo measures of intradiscal pressure (IDP), vertebral loading from telemeterized implants and trunk muscle myoelectric activity recorded by electromyography (EMG). PMID:25901907

  13. Experimental Investigation of Jet Impingement Cooling On a Ribbed Surface with Holes

    OpenAIRE

    Kartik Jujare,; Shashank Kumat

    2014-01-01

    Jet impingement has found applications in many processes where there is a need for higher heat transfer The paper reports the results of experimental investigations of the flow and heat transfer from a triangular ribbed heated plate with holes, impinged by a round jet in a confined case built around the plate. The parameters varied are heat flux, ratio of the distance of the nozzle from the plate to the diameter of the nozzle and flow rate of air. These values are further proc...

  14. Experimental Investigation of Jet Impingement Cooling On a Ribbed Surface with Holes

    Directory of Open Access Journals (Sweden)

    Kartik Jujare,

    2014-01-01

    Full Text Available Jet impingement has found applications in many processes where there is a need for higher heat transfer The paper reports the results of experimental investigations of the flow and heat transfer from a triangular ribbed heated plate with holes, impinged by a round jet in a confined case built around the plate. The parameters varied are heat flux, ratio of the distance of the nozzle from the plate to the diameter of the nozzle and flow rate of air. These values are further processed to calculate the Reynolds number, heat transfer coefficients and consequently the Nusselt numbers for each combination.

  15. Investigation of turbulent flow in an open channel with transversal ribs

    Czech Academy of Sciences Publication Activity Database

    Příhoda, Jaromír; Šulc, J.; Sedlář, M.; Zubík, P.

    Praha : Ústav termomechaniky AV ČR, v. v. i., 2008 - (Jonáš, P.; Uruba, V.), s. 47-48 ISBN 978-80-87012-14-7. [Colloquium FLUID DYNAMICS 2008. Praha (CZ), 22.10.2008-24.10.2008] R&D Projects: GA ČR GA103/06/0461 Institutional research plan: CEZ:AV0Z20760514 Keywords : free-surface flow * supercritical flow over ribs * numerical and experimental modelling Subject RIV: BK - Fluid Dynamics

  16. Neutron activation analysis of calcium/phosphorus ratio in rib bone of healthy humans

    International Nuclear Information System (INIS)

    The Ca/P ratio was estimated in intact rib bone samples from healthy humans, 37 women and 45 men, aged from 15 to 55 years using instrumental neutron activation analysis. No statistically significant differences (p>0.05) age- or sex-related differences in the Ca/P ratio were observed. The mean value (M±SD) for the investigated parameter for the whole group studied, 2.33±0.34, was within a very wide range of published data and close to the median value

  17. Ultra-fast timing detectors to probe exotic properties of nuclei using RIB facility

    CERN Document Server

    Datta, Ushasi; Rahaman, A

    2016-01-01

    Recently, the facilities of radioactive ion beam (RIB) combined with advanced detector systems provide us unique opportunity to probe the exotic properties of the nuclei with unusual neutron-to-proton ratio. In this article, a study of characterization of different types of ultra-fast timing detectors: a special type of gas detector (multi-strip multi-gap resistive plate chamber, MMRPC) ($\\sigma$ $<$100 ps), scintillators array ( viz., $LaBr_3:Ce$) (timing resolution ($\\sigma<$250 ps) are being presented. A brief discussion on usage of these different types of ultra-fast timing detector systems at radioactive ion beam facilities is also included.

  18. Control of Metal Arrays Based on Heterometallics Masquerading in Heterochiral Aggregations of Chiral Clothespin-Shaped Complexes.

    Science.gov (United States)

    Naito, Masaya; Inoue, Ryo; Iida, Masayuki; Kuwajima, Yuuki; Kawamorita, Soichiro; Komiya, Naruyoshi; Naota, Takeshi

    2015-09-01

    Heterometal arrays in molecular aggregations were obtained by the spontaneous and ultrasound-induced gelation of organic liquids containing the chiral, clothespin-shaped trans-bis(salicylaldiminato) d8 transition-metal complexes 1. Heterometallic mixtures of complexes 1 a (Pd) and 1 b (Pt) underwent strict heterochiral aggregation entirely due to the organic shell structure of the clothespin shape, with no effect of the metal cores. This phenomenon provides an unprecedented means of generating highly controlled heterometallic arrangements such as alternating sequences [(+)-Pd(-)-Pt(+)-Pd(-)-Pt⋅⋅⋅] as well as a variety of single metal-enriched arrays (e.g., [(+)-Pt(-)-Pd(+)-Pd(-)-Pd(+)-Pd(-)-Pd⋅⋅⋅] and [(+)-Pd(-)-Pt(+)-Pt(-)-Pt(+)-Pt(-)-Pt⋅⋅⋅]) upon the introduction of an optically active masquerading unit with a different metal core in the heterochiral single-metal sequence. The present method can be applied to form various new aggregates with optically active Pd and Pt units, to allow 1) tuning of the gelation ultrasound sensitivity based on the different hearing abilities of the metal units; 2) aggregation-induced chirality transfer between heterometallic species; and 3) aggregation-induced chirality enhancement. A mechanistic rationale is proposed for these molecular aggregations based on the molecular structures of the units and the morphologies of the aggregates. PMID:26212577

  19. Anterior Shoulder Instability with Concomitant Superior Labrum from Anterior to Posterior (SLAP) Lesion Compared to Anterior Instability without SLAP Lesion

    Science.gov (United States)

    Durban, Claire Marie C.; Kim, Je Kyun; Kim, Sae Hoon

    2016-01-01

    Background The aims of this study were to investigate the clinical characteristics of patients with combined anterior instability and superior labrum from anterior to posterior (SLAP) lesions, and to analyze the effect of concomitant SLAP repair on surgical outcomes. Methods We retrospectively reviewed patients who underwent arthroscopic stabilization for anterior shoulder instability between January 2004 and March 2013. A total of 120 patients were available for at least 1-year follow-up. Forty-four patients with reparable concomitant detached SLAP lesions (group I) underwent combined SLAP and anterior stabilization, and 76 patients without SLAP lesions (group II) underwent anterior stabilization alone. Patient characteristics, preoperative and postoperative pain scores, Rowe scores, and shoulder ranges of motion were compared between the 2 groups. Results Patients in group I had higher incidences of high-energy trauma (p = 0.03), worse preoperative pain visual analogue scale (VAS) (p = 0.02), and Rowe scores (p = 0.04). The postoperative pain VAS and Rowe scores improved equally in both groups without significant differences. Limitation in postoperative range of motion was similar between the groups (all p-value > 0.05). Conclusions Anterior instability with SLAP lesion may not be related to frequent episodes of dislocation but rather to a high-energy trauma. SLAP fixation with anterior stabilization procedures did not lead to poor functional outcomes if appropriate surgical techniques were followed. PMID:27247742

  20. Telemetrija rib

    OpenAIRE

    MERHAR, DAVID

    2016-01-01

    Za dosego določenih ciljev in razlage migracij določenih vrst živali si naravoslovci pomagajo s tehnologijo, ki se imenuje telemetrija. V diplomski nalogi sem želel dobiti pregled sistemov, ki se jih uporablja za opazovanje in preučevanje migracij ter ostalih fizioloških lastnosti živali. Najprej sem se seznanil z dosedanjim zgodovinskim delom uporabe telemetrije in se seznanil s posameznimi tehnologijami, ki se uporabljajo za sledenje. Del izobraževanja sem namenil predstavitvi uporabe...

  1. Electrical pumping Fabry–Perot lasing of a III-V layer on a highly doped silicon micro rib

    International Nuclear Information System (INIS)

    Direct-current-pumped Fabry–Perot lasing was observed from a Si/III-V hybrid laser fabricated by the Ar/O2 plasma assisted direct bonding of an InP-based III-V active layer on a highly doped silicon micro rib. Electrical pumping from a silicon micro rib to InGaAsP multiple quantum wells (MQWs) for generating CW Fabry–Perot lasing was successfully demonstrated at a threshold current of 65 mA at 5 °C. The semiconductive and optical properties of the hetero-junction between the silicon micro rib and InGaAsP MQWs under direct current injection were measured and discussed. (letter)

  2. Photonic crystal cavity embedded barium strontium titanate thin-film rib waveguide prepared by focused ion beam etching

    International Nuclear Information System (INIS)

    A photonic crystal (PC) cavity embedded Ba0.7Sr0.3TiO3 (barium strontium titanate, or BST) rib waveguide, which functions as an optical filter at λ = 1550 nm, is designed using finite-difference time-domain (FDTD) simulation. The PC cavity is composed of two 5-row photonic crystal mirrors, which are formed by air holes (radii 250 nm) arranged in triangular lattice (periodicity 625 nm) in the BST matrix. Calculations suggested that the required cavity length should be 800 nm for the resonant peak to be situated at 1550 nm. Based on this design, PC cavities were fabricated on BST thin-film rib waveguides by focused ion beam etching with satisfactory results. The transmission spectra of the BST thin-film rib waveguides with PC cavities have been measured. The results agreed well with the FDTD simulation.

  3. Relationships among chemical compositions of 9-10-11th ribs, carcass and empty body of young Nellore bulls

    Directory of Open Access Journals (Sweden)

    Luiz Henrique Olivera Silva

    2013-12-01

    Full Text Available The direct determination of carcass and empty body composition as experimental routine, despite being the most accurate method, is time consuming, laborious and expensive. Therefore, indirect methods have been developed to estimate on quick, simple, economical and reliable ways for the compositions of carcass and empty body of beef cattle. This study aimed to obtain the correlations among the compositions of 9-10-11th ribs, carcass and empty body for protein, fat, ashes and water contents, expressed in percentage and kilograms, in young Nellore bulls. Sixty-seven non-castrated Nellore bulls were randomly selected for confining period in two consecutive years (2008 and 2009 and were confined in individual pens for approximately 100 days, until they reached a subcutaneous fat thickness of 4 mm over the Longissimus muscle. They were slaughtered at an average age of 540 days and body weight of 398 kg. Chemical analysis of the 9-10-11th ribs, carcass and empty body were carried for protein, fat, ashes and water. The 9-10-11th ribs cut was obtained according to Hankins and Howe (1946. Carcass composition was obtained after grinding, homogenizing, sampling, analyzing and combining edible portions and bones. Empty body composition was obtained after grinding, homogenizing, sampling, analyzing, and combining blood, hide, head + feet, viscera, and carcass. The correlation coefficients were calculated between ribs and carcass, and between ribs and empty body for the contents expressed in percentage and kilograms. The correlations obtained between composition of 9-10-11th ribs and carcass were 0.68; 0.62; 0.05; and 0.79, respectively, for percentages of protein, fat, ashes and water. For the same tissues, expressed in kilograms, the correlations obtained were 0.66; 0.73; 0.49; and 0.79, respectively, for contents of protein, fat, ashes and water. For the relationships between composition of the 9-10-11th ribs and empty body, the correlation coefficients

  4. Impingement cooling in a rotating curved square annular duct with crossflow effect from Rib-roughened surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Hsieh, Shou-Shing; Huang, Jung-Tai; Tsai, Huang-Hsiu [Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan (Taiwan)

    2003-01-01

    An experimental investigation was carried out to determine the effects of jets in crossflow on impingement heat transfer from rib-roughened curved duct with rotational speeds of 120 and 240 rpm. The jet impinged on curved surface in crossflow having repeated square ribs (3 x 3mm). The curvature of the duct was fixed and has a value of 300 mm. The rib height (e) was fixed at 1.5 mm and pitch-to-height ratio (p/e) kept at 2. The study covered jet Reynolds number in the range 6500 to 26000, and duct stream crossflow Reynolds number from 3250 to 13000 based on jet nozzle diameter, respectively, which gave M = 0.12 to 2. Results were presented for rotational, crossflow, roughened surfaces and curvature effects on local Nusselt numbers. Significant heat transfer enhancement was found for the present physical geometry and within the ranges of operating parameters considered in the study. (orig.)

  5. Radiological safety observations in the gas-jet transport system for transporting radioactive atoms of RIB facility

    International Nuclear Information System (INIS)

    RIB facility of VECC with its significant progress leading to the ultimate project 'ANURIB' unfastens a wide spectrum of radiological safety issues which need to be systematically attended. The issues range from, limiting of external exposure, containment of both fixed and transferable type of radioactive contamination of short and long lived radioisotopes and controlling any probable internal exposure to complex ones like estimation of various limiting values of radiation protection and operational quantities. The present work is mainly focussed on the radiological safety issues of transporting the radioactive atoms generated inside the He-Jet multi target chamber (from RTC vault) to the RIB facility (Radioactive Ion Beam facility) at HR Cave using the gas-jet transport system. The radiological safety issues are discussed for both ISOL and PFS method of RIB production

  6. The usefulness of bone scintigraphy and 67Ga scintigraphy in the evaluation of rib lesions in patients with multiple myeloma

    International Nuclear Information System (INIS)

    Rib lesions in 13 patients with multiple myeloma were evaluated by using 99mTc-phosphorous compounds bone scintigraphy and 67Ga scintigraphy. In 10 patients (22 sites), hot lesions were observed on bone scintigraphy. In 6 of 10 patients no abnormal accumulations were noted on 67Ga scintigraphy. Among these 6 patients, osteolytic change was recognized on skeletal roentgenograms in only one patient. In 7 patients, both radionuclides accumulated in the rib lesions. Osteolytic change was observed in 3 patients (one lesion was histologically confirmed) and osteoporotic change was noted in 2 patients on skeletal roentgenograms. The appearance of multiple hot spots was observed in one patients on sequential 67Ga scintigraphy. Thus, the combination technique of bone and 67Ga scintigraphy seems to be a useful method for evaluating rib lesions in patients with multiple myeloma. (author)

  7. Nonlinear equations of ribbed shells motion taking into account the different properties of the material. II

    Directory of Open Access Journals (Sweden)

    V.M. Zhgutov

    2010-03-01

    Full Text Available It is known that in the process of deformation of shells depending on the level and duration of external influences may appear different properties of the material of construction: elasticity, plasticity, creep, etc. The manifestation of plasticity or creep leads to irreversible consequences. To design is an obviously strong and stable construction, it is necessary to exclude the possibility of manifestation of these properties.That is why urgent and important tasks are the development of better models of deformation of ribbed shells and corresponding algorithms for research and analysis of the strength and stability of ribbed shells taking into account the different material properties.In [1] we were actually obtained the equilibrium equations of elastic isotropic shallow shells [which are an integral part of the dynamics (movement of these shells from the perspective of German-known principle of d'Alembert-Euler equations] with allowance for geometric nonlinearity, the discrete location of the edges, their width, the shear and torsional stiffness, as well as the effect of transverse shear and rotational inertia.This paper presents the generalization, development and analysis of mathematical models proposed by the author in the case of shells of general form and taking into account the different properties of the material under static (both short-and long-term stress.

  8. Ribbing disease: radiographic and biochemical characterization, lack of response to pamidronate

    International Nuclear Information System (INIS)

    Ribbing disease is a rare form of sclerosing dysplasia characterized by benign endosteal and periosteal bone growth confined to the diaphyses of the long bones, usually the tibiae and femora. The onset is usually after puberty and the most common presentation is pain that is usually self-limited, but may progress. The etiology and optimal treatment for the disease are unknown. We present the case of a 39-year-old Hispanic man with clinical and radiological manifestations of Ribbing disease. Radiographs and CT imaging demonstrated typical cortical thickening in the mid-diaphyses of the tibiae bilaterally that correlated with intense tracer uptake on 99mTc-MDP bone scans. MRI demonstrated cortical thickening and abnormal marrow signal consistent with marrow edema. Bone marrow edema may explain the pain frequently associated with the disease. Multiple serum and urine markers of bone metabolism were within normal limits. In an effort to ameliorate pain, the patient was treated with the bisphosphonate, pamidronate. In spite of treatment, pain increased, requiring additional and larger doses of analgesics. Serial radiographs, CT, bone scans, and MRI all demonstrated disease progression with pamidronate treatment. In this report we present for the first time the finding of bone marrow edema with MRI as well as disease progression during intravenous pamidronate treatment. (orig.)

  9. The Vertebral Column, Ribs, and Sternum of the African Giant Rat (Cricetomys gambianus Waterhouse

    Directory of Open Access Journals (Sweden)

    Matthew Ayokunle Olude

    2013-01-01

    Full Text Available Examined bones were obtained from eight adult African giant rats, Cricetomys gambianus Waterhouse. Animals used had an average body mass of 730.00±41.91 gm and body length of 67.20±0.05 cm. The vertebral formula was found to be C7, T13, L6, S4, Ca31–36. The lowest and highest points of the cervicothoracic curvature were at C5 and T2, respectively. The spinous process of the axis was the largest in the cervical group while others were sharp and pointed. The greatest diameter of the vertebral canal was at the atlas (0.8 cm and the lowest at the caudal sacral bones (2 mm. The diameter of the vertebral foramen was the largest at C1 and the smallest at the S4; the foramina were negligibly indistinct caudal to the sacral vertebrae. There were 13 pairs of ribs. The first seven pairs were sternal, and six pairs were asternal of which the last 2-3 pairs were floating ribs. The sternum was composed of deltoid-shaped manubrium sterni, four sternebrae, and a slender processus xiphoideus. No sex-related differences were observed. The vertebral column is adapted for strong muscular attachment and actions helping the rodent suited for speed, agility, dexterity, and strength which might enable it to overpower prey and escape predation.

  10. Scattering of the field of a multi-element phased array by human ribs

    Science.gov (United States)

    Gélat, P.; ter Haar, G.; Saffari, N.

    2012-03-01

    The efficacy of high intensity focused ultrasound (HIFU) for the non-invasive treatment of cancer has been demonstrated for a range of different cancers including those of the liver, kidney, prostate and breast. As a non-invasive focused therapy, HIFU offers considerable advantages over other techniques such as chemotherapy and surgical resection, in terms of invasiveness and risk of harmful side effects. Despite its advantages, however, there are a number of significant challenges currently hindering its widespread clinical application. One of these challenges is the need to transmit sufficient energy through the ribcage to induce tissue necrosis at the required foci whilst minimising the formation of side lobes. Multielement random arrays are currently showing great promise in overcoming the limitations of single-element transducers. Nevertheless, successfully treating a patient for liver tumours requires a thorough understanding of the way in which the ultrasonic pressure field from a HIFU array is scattered by the ribcage. A mesh of quadratic pressure patches was generated using CT scan data for ribs nine to twelve on the right side. A boundary element approach based on a Generalised Minimal Residual (GMRES) implementation of the Burton-Miller formulation was used, in conjunction with phase conjugation techniques to focus the field of a 256-element random HIFU array past the ribs at both intercostal and transcostal treatment locations. This method has the advantage of accounting for full effects of scattering and diffraction in three dimensions under continuous wave excitation.

  11. Tensile and compressive behaviour of multilayer flax-rib knitted preform reinforced epoxy composites

    International Nuclear Information System (INIS)

    Highlights: ► We examine the tensile and compressive behaviour of flax knitted/epoxy composite laminates. ► The effect of number of preform layers and the lay-up architecture were studied. ► Morphological study on the fractured surface of the composite laminate is carried out. ► Tensile behaviour is a synergy of fibre/matrix whereas compressive properties are contributed by reinforcing matrix. - Abstract: Flax fibres can be considered as a natural composite, made of concentric layers in which cellulose microfibrils are surrounded helicoidally in a polysaccharidic matrix. They are characterised by low density, high aspect ratio and good specific mechanical properties. These considerations make flax a potential contender for reinforcement in polymer matrix composites, as replacement for the widely used glass fibres. 1 × 1 rib knitted structures are manufactured on a V-bed manual knitting machine using flax yarn. Composites with two and four rib knitted preform layers were fabricated in a hot press. Tensile and compressive tests were carried out and the failure mechanism was analysed, structure of the broken end of the composite was observed by scanning electron microscope (SEM). It is observed that tensile strength and stiffness is a product of the fibre/matrix synergy, whereas the compressive strength and stiffness are contributed by the reinforcing matrix

  12. Preliminary shielding estimates for the proposed National ISOL Radioactive Ion Beam (RIB) Facility at Oak Ridge

    International Nuclear Information System (INIS)

    ORNL built a first-generation Radioactive Ion Beam (RIB) facility for astrophysics and nuclear physics research; it was named Holifield Radioactive Ion Beam Facility (HRIBF) and is based on the Isotope Separator On Line (ISOL) technique. Planning is underway for a second- generation facility, the National ISOL RIB facility at Oak Ridge; it will build on the existing HRIBF and may utilize many existing components and shielded areas. Preliminary upgrade plan for the new facility includes: adding a superconducting booster for the tandem accelerator; replacing the 1960-vintage, 60-MeV proton, 50-microamp ORIC (Oak Ridge Isochronous Cyclotron) with a modern 200-MeV proton, 200-microamp cyclotron; and building a high-power 238U fission target to accept the 200-MeV proton beam. This report summarizes the results of a preliminary 1-D shielding analysis of the proposed upgrade, to determine the shielding requirements for a 0.25 mrem/h dose rate at the external surface of the exclusion area. Steel shielding weights ranging from 60 to 100 metric tons, were considered manageable; these could be reduced by a factor of 2 to 3 if the orientation of the proposed target station was changed

  13. Jumbled spine and ribs (Jsr): a new mutation on mouse chromosome 5.

    Science.gov (United States)

    Miyoshi, H; Kon, Y; Seo, K W; Jin, H K; Hasegawa, A; Watanabe, T

    1999-03-01

    Jumbled spine and ribs (Jsr) is an autosomal dominant mutation that results in malformation of the axial skeleton. The vertebrae of mutant mice (Jsr/+) are all shorter than those of normal mice (+/+) in the inbred line and show various abnormalities. In addition, several ribs are fused at their proximal region because of fusion of thoracic vertebrae. In this study, we localized the Jsr mutation on distal Chromosome (Chr) 5 and constructed a high-resolution map. Chromosomal mapping was performed with an inter-subspecific backcross of (CKH-Jsr/+ x MOG) F1 carrying the Jsr allele and CKH-+/+. The predicted gene order around Jsr was determined to be cen-(Epo, Pdgfa, D5Mit31, D5Mit374)-(Jsr, Nfe2u, D5Mit99, D5Mit247, D5Mit284, D5Mit292, D5Mit327)-D5Mit328-tel. Subsequently, high-resolution mapping concluded the Jsr localization to be cen-Nfe2u-1.0cM-Jsr-0.2cM-D5Mit247,292-tel . Jsr/Jsr homozygotes are alive, as the mutation is not lethal. Based on histological analysis of mutant embryos, Jsr is hypothesized to be caused by abnormal development of primordial cells in the axial skeleton. PMID:10051313

  14. The effect of Mounted Ribs on the Radiation of a Soundboard

    CERN Document Server

    Kappel, Marcel; Gerhard, Reimund

    2010-01-01

    The grand piano is one of the most important instruments in western music. Its functioning and details are investigated and understood to a reasonable level, however, differences between manufacturers exist which are hard to explain. To add a new piece of understanding, we decided to investigate the effect of ribs mounted on a soundboard. Apart from pianos, this is important to a wider class of instruments which radiate from a structured surface. From scattering theory, it is well-known that a regular array of scatterers yields a band structure. By a systematic study of the latter, the effect of the ribs on the radiated spectrum is demonstrated for a specially manufactured multichord mimicking topologically a piano soundboard. To distinguish between radiated sound and sound propagated inside the board we use piezopolymers, an innovative, non-invasive technique. As a result we find a dramatic change in the spectrum allowed to propagate in the soundboard which is consequently radiated. An explanation by a simpl...

  15. Targets for ion sources for RIB generation at the Holifield Radioactive Ion Beam Facility

    International Nuclear Information System (INIS)

    The Holifield Radioactive Ion Beam Facility (HRIBF), now under construction at the Oak Ridge National Laboratory, is based on the use of the well-known on-line isotope separator (ISOL) technique in which radioactive nuclei are produced by fusion type reactions in selectively chosen target materials by high-energy proton, deuteron, or He ion beams from the Oak Ridge Isochronous Cyclotron (ORIC). Among several major challenges posed by generating and accelerating adequate intensities of radioactive ion beams (RIBs), selection of the most appropriate target material for production of the species of interest is, perhaps, the most difficult. In this report, we briefly review present efforts to select target materials and to design composite target matrix/heat-sink systems that simultaneously incorporate the short diffusion lengths, high permeabilities, and controllable temperatures required to effect maximum diffusion release rates of the short-lived species that can be realized at the temperature limits of specific target materials. We also describe the performance characteristics for a selected number of target ion sources that will be employed for initial use at the HRIBF as well as prototype ion sources that show promise for future use for RIB applications

  16. Anterior retropharyngeal approach to the cervical spine.

    OpenAIRE

    Behari S; Banerji D; Trivedi P; Jain V; Chhabra D

    2001-01-01

    The anterior retropharyngeal approach (ARPA) accesses anteriorly situated lesions from the clivus to C3, in patients with a short neck, Klippel Feil anomaly or those in whom the C2-3 and C3-4 disc spaces are situated higher in relation to the hyoid bone and the angle of mandible where it is difficult to approach this region using the conventional anterior approach, due to the superomedial obliquity of the trajectory. The ARPA avoids the potentially contaminated oropharyngeal cavity providing ...

  17. Mini-open anterior lumbar interbody fusion.

    Science.gov (United States)

    Gandhoke, Gurpreet S; Ricks, Christian; Tempel, Zachary; Zuckerbraun, Brian; Hamilton, D Kojo; Okonkwo, David O; Kanter, Adam S

    2016-07-01

    In deformity surgery, anterior lumbar interbody fusion provides excellent biomechanical support, creates a broad surface area for arthrodesis, and induces lordosis in the lower lumbar spine. Preoperative MRI, plain radiographs, and, when available, CT scan should be carefully assessed for sacral slope as it relates to pubic symphysis, position of the great vessels (especially at L4/5), disc space height, or contraindication to an anterior approach. This video demonstrates the steps in an anterior surgical procedure with minimal open exposure. The video can be found here: https://youtu.be/r3bC4_vu1hQ . PMID:27364424

  18. Shabwa, Ma'rib et San'â'. Le devenir des capitales sudarabiques à la veille de l'islam

    OpenAIRE

    Schiettecatte, Jérémie

    2008-01-01

    Le destin de trois des plus grandes villes sudarabiques - Shabwa, Ma'rib et San'ā' - est observé du tournant de l'ère chrétienne à l'avènement de l'islam. Pour chacun de ces sites, l'observation de ses fonctions politiques, religieuses, défensives et économiques nous permet de voir comment chacune de ces capitales de royaume évolue. Ces trois parcours illustrent combien la scission entre les temps préislamiques et islamiques est artificielle. Si deux d'entre-elles, Shabwa et Ma'rib, déclinent...

  19. A Rare Cause of Persistent Pulmonary Hypertension Resistant to Therapy in The Newborn: Short-Rib Polydactyly Syndrome

    Directory of Open Access Journals (Sweden)

    Nihat Demir

    2015-01-01

    Full Text Available Short-rib polydactyly syndrome is an autosomal recessively inherited lethal skeletal dysplasia. The syndrome is characterized by marked narrow fetal thorax, short extremities, micromelia, cleft palate/lip, polydactyly, cardiac and renal abnormalities, and genital malformations. In cases with pulmonary hypoplasia, persistent pulmonary hypertension of the newborn can develop. In this paper, we present a term newborn with persistent pulmonary hypertension of the newborn, which has developed secondary to short-rib polydactyly syndrome and was resistant to therapy with inhaled nitric oxide and oral sildenafil.

  20. Secondary anterior crocodile shagreen of Vogt.

    Science.gov (United States)

    Tripathi, R C; Bron, A J

    1975-01-01

    The clincopathological features and pathogenesis of secondary mosaic degeneration of the cornea (anterior crocodile shagreen of Vogt) are described. The structural basis for the normal anterior corneal mosaic pattern seems to lie in the particular arrangement of many prominent collagen lamellae of the anterior stroma that thake an oblique course to gain insertion into Bowman's layer. Since, at normal intraocular pressure, Bowman's layer is under tension, when viewed from the anterior surface the cornea appears smooth. By releasing the tension, however, a reproducible polygonal ridge pattern becomes manifest. It is suggested that a prolonged phthisical state of the eye is one condition wherein the mosaic pattern may become permanent and that, as a secondary event, this is followed by irregular calcification of Bowman's layer which particularly involves the ridges projecting into the epithelium. Biomicroscopically these ridges corresponded to the branching reticular arrangement of the mosaic opacities. Images PMID:1079137

  1. Anterior Cervical Discectomy and Fusion with Plating

    Medline Plus

    Full Text Available Anterior Cervical Discectomy and Fusion with Plating Broward Health Medical Center Fort Lauderdale, FL November 17, 2011 I'm Dr. Matthew Moore, head of the Spine Care Center here at North Broward Medical Center. And ...

  2. Trypan blue dye for anterior segment surgeries

    OpenAIRE

    Jhanji, V; Chan, E.; Das, S.; Zhang, H; Vajpayee, R B

    2011-01-01

    Use of vital dyes in ophthalmic surgery has gained increased importance in the past few years. Trypan blue (TB) has been a popular choice among anterior segment surgeons mainly due to its safety, ease of availability, and remarkable ability to enable an easy surgery in difficult situations mostly related to visibility of the targeted tissue. It is being used in cataract surgery since nearly a decade and its utilization has been extended to other anterior segment surgeries like trabeculectomy ...

  3. Asymmetrically increased rib cage uptake on bone scintigraphy: Incidental detection of pleural mesothelioma on single photon emission computed tomography/computed tomography

    International Nuclear Information System (INIS)

    Follow-up bone scintigraphy (BS) in a patient of carcinoma left breast, who was treated with surgery followed by radiotherapy 12 years back, revealed asymmetrically increased radiotracer uptake in left-sided ribs. Since, this pattern was atypical for metastatic rib involvement, single photon emission computed tomography/computed tomography (SPECT/CT) of thorax was done in the same setting which revealed circumferential nodular left-sided pleural thickening. Biopsy confirmed it to be pleural mesothelioma. Left-sided ribs showed no abnormality on CT, thus suggesting the rib uptake as reactive in nature. This pattern of asymmetric rib uptake on BS should be kept in mind and warrants further investigation for determining underlying pathology

  4. Functional Outcomes of Primary Anterior Cruciate Ligament Reconstruction with Tibialis Anterior Allograft

    OpenAIRE

    Başar, Selda; Büyükafşar, Enes; Hazar, Zeynep; Ataoğlu, Baybars; Kanatlı, Ulunay

    2014-01-01

    Objectives: Allografts have potential advantages in primary anterior cruciate ligament reconstruction (ACLR), including the absence of donor site morbidity, shorter operative times, improved cosmesis, and easier rehabilitation. There is limited and conflicting outcome data for ACLR with tibialis anterior allograft. The purpose of this study was to evaluate the functional outcomes of ACLR with tibialis anterior allograft. Methods: We retrospectively evaluated patients underwent ACLR using with...

  5. Anterior Eye Imaging with Optical Coherence Tomography

    Science.gov (United States)

    Huang, David; Li, Yan; Tang, Maolong

    The development of corneal and anterior segment optical coherence tomography (OCT) technology has advanced rapidly in recently years. The scan geometry and imaging wavelength are both important choices to make in designing anterior segment OCT systems. Rectangular scan geometry offers the least image distortion and is now used in most anterior OCT systems. The wavelength of OCT light source affects resolution and penetration. An optimal choice of the OCT imaging wavelength (840, 1,050, or 1,310 nm) depends on the application of interest. Newer generation Fourier-domain OCT technology can provide scan speed 100-1000 times faster than the time-domain technology. Various commercial anterior OCT systems are available on the market. A wide spectrum of diagnostic and surgical applications using anterior segment OCT had been investigated, including mapping of corneal and epithelial thicknesses, keratoconus screening, measuring corneal refractive power, corneal surgery planning and evaluation in LASIK, intracorneal ring implantation, assessment of angle closure glaucoma, anterior chamber biometry and intraocular lens implants, intraocular lens power calculation, and eye bank donor cornea screening.

  6. Lesiones del ligamento cruzado anterior

    Directory of Open Access Journals (Sweden)

    Alejandro Álvarez López

    2015-01-01

    Full Text Available Fundamento: el ligamento cruzado anterior desempeña un papel muy importante en la estabili-dad de la rodilla. La incidencia de esta afección es alta en pacientes que practican deportes de contacto y de no ser tratados de forma adecuada, los resultados son desfavorables. Objetivo: profundizar en los factores necesarios para el tratamiento adecuado de enfermos con esta lesión y evitar las complicaciones. Método: se realizó una revisión bibliográfica de un total de 300 artículos publicados en Pubmed, Hinari y Medline mediante el localizador de información Endnote, de ellos se utilizaron 52 citas selecciona-das para realizar la revisión, 48 de ellas de los últimos cinco años donde se incluyeron seis libros. Desarrollo: se discuten los aspectos relacionados con el diagnóstico clínico e imaginológico. Se aborda la clasificación de esta lesión en cuanto a varios aspectos como: tiempo, lesión de ligamentos u ósea, aislada o combinada y parcial o total. Se mencionan los parámetros para obtener resultados satisfac-torios al considerar factores como la edad del enfermo, lesiones asociadas y tiempo de la lesión. Se relacio-nan los requisitos para la selección del implante y se mostró las ventajas y desventajas de cada tipo de in-jerto. Las complicaciones de esta cirugía están relacionadas con la técnica quirúrgica y médicas. Conclusiones: las lesiones del ligamento son entidades traumáticas que afectan por lo general a pacientes jóvenes. Para lograr un resultado satisfactorio en el tratamiento es necesario el conocimiento de su anatomía, clasificación, tipo de injerto a emplear según sus ventajas y desventajas.

  7. Wastewater contaminant transport and treatment in a nutrient limited ribbed fen

    Science.gov (United States)

    McCarter, C. P. R.; Price, J. S.; Branfireun, B. A.

    2015-12-01

    To minimize the discharge of wastewater contaminants from remote northern communities and mining operations, fen peatlands in sub-arctic regions are used for tertiary wastewater treatment to detain, transform, and remove these contaminants. However, there is a limited understanding of contaminant transport and treatment in fen peatlands, particularly in sub-arctic Canada. To better characterize wastewater contaminant transport and treatment in these systems, approximately 44 m3 day-1 of simulated wastewater, concentrated custom-blend fertilizer (NO3-, PO33-, and SO42-) and Cl- diluted with water, was pumped into a small 0.5 ha sub-arctic ribbed fen continuously for 47 days (July 15th -August 31st 2014). Contaminant concentration of 3 similar ribbed fens varied between 0.0-3.0 mg L-1 over the study period (May - September 2014). An exponential increase in transmissivity (2.4 to 16.8 m2 day-1) as the water table rose (~0.16 m) increased the average linear groundwater velocity (0.5 to 3.4 m day-1) and resulted in rapid SO42- (0.8 m day-1) and Cl- (1.9 m day-1) transport. Notwithstanding the rapid transport of Cl-, diffusion into inactive pores still retarded Cl- transport by a factor of 1.8. Contrary to the rapid transport of SO42- and Cl-, the other contaminants were rapidly removed from the pore water (likely through biological uptake or adsorption) and minimal transport was observed (0.29 and 0.04 m day-1 for PO33- and NO3-, respectively). Northern ribbed fens have a large capacity to detain certain wastewater contaminants (e.g., NO3- and PO33-), yet allow rapid transport of others (e.g., SO42- and Cl-). Thus, these peatlands have the potential to significantly decrease wastewater contamination in northern aquatic environment by both biogeochemical and physical processes but careful management of the hydrology is required to prevent the release of mobile contaminants.

  8. Fabrication and characterization of Ge20Sb15Se65 chalcogenide glass rib waveguides for telecommunication wavelengths

    International Nuclear Information System (INIS)

    We report on the fabrication and optical properties of Ge20Sb15Se65 chalcogenide glass rib waveguides on a single photonic chip. Radio-frequency magnetron sputtering method is employed to deposit 1.36-μm-thick films and reactive ion etching with CHF3 is used to pattern 0.76-μm-deep rib waveguides of 1–4 μm wide with low surface roughness and vertical sidewalls. Using lensed fibers, the insertion losses for rib waveguides of different widths are measured and propagation losses are estimated to be lower than 1 dB/cm. Finite difference method simulations and refractive index/curve fitting are used to observe a moderate normal dispersion of the waveguides at 1550 nm. - Highlights: • RF magnetron sputtering was used to deposit uniform Ge20Sb15Se65 thin films. • CHF3 reactive ion etching of rib waveguides vertical profile and smooth sidewall. • Insertion losses at 1550 nm measured and low propagation losses estimated. • Dispersion engineered by finite difference methods and refractive curve fitting

  9. Ti:sapphire rib waveguides as single-transverse-mode broadband fluorescence sources for optical coherence tomography applications

    NARCIS (Netherlands)

    Grivas, C.; Shepherd, D.P.; May-Smith, T.C.; Eason, R.W.; Pollnau, M.; Crunteanu, A.; Jelinek, M.

    2003-01-01

    Ar+-beam-milled rib waveguides in pulsed-laser-deposited Ti:sapphire layers show broadband single transverse mode fluorescence emission at output powers up to 300 μW and propagation losses comparable to those in unstructured planar waveguide counterparts.

  10. Broadband single-transverse-mode fluorescence sources based on ribs fabricated in pulsed laser deposited Ti: sapphire waveguides

    NARCIS (Netherlands)

    Grivas, C.; May-Smith, T.C.; Shepherd, D.P.; Eason, R.W.; Pollnau, M.; Jelinek, M.

    2004-01-01

    Active rib waveguides with depths and widths varying from 3 to 5 μm and from 9 to 24 μm, respectively, have been structured by $Ar^{+}$-beam etching in pulsed laser deposited Ti:sapphire layers. Losses in the channel structures were essentially at the same levels as the unstructured planar waveguide

  11. A novel and effective acupuncture modality as a complementary therapy to acute pain relief in inpatients with rib fractures

    Directory of Open Access Journals (Sweden)

    Hsin-Yi Ho

    2014-06-01

    Full Text Available Background: Pain control has been emphasized as a priority for both practitioners and inpatients with rib fractures, since analgesia could only offer limited relief from severe pain. A prospective and randomized controlled trial was conducted to analyze the efficacy and efficiency of acupuncture in acute pain relief for inpatients with rib fractures. Methods: A total of 58 inpatients were recruited and allocated to two groups, receiving identical doses of conventional oral analgesics as well as filiform needles as treatment and thumbtack intradermal (TI needles placed upon the skin surface as a control, respectively, via novel acupuncture modality once daily for three consecutive days. The effect of pain relief was evaluated during activities that induce pain, and sustained maximal inspiration (SMI lung volumes and sleep quality were assessed. Results: The patients treated with filiform needles had more effective pain relief than those in the TI needle group during deep breathing, coughing, and turning over the body (p < 0.05, and the effect persisted for at least 6 h in most patients. Sustained maximal inspiration lung volumes and sleep quality did not show improvement through every acupuncture intervention, and they could not respond accurately to pain relief via acupuncture. Conclusion: The active evaluation could provide a more adaptive model for assessing pain intensity due to rib fractures. This novel acupuncture modality in which the needle insertion sites are corresponding to the pain spots can be a safe and viable therapy for relieving pain in inpatients with rib fractures.

  12. Radiation-Induced Rib Fractures After Hypofractionated Stereotactic Body Radiation Therapy: Risk Factors and Dose-Volume Relationship

    Energy Technology Data Exchange (ETDEWEB)

    Asai, Kaori [Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan); Shioyama, Yoshiyuki, E-mail: shioyama@radiol.med.kyushu-u.ac.jp [Department of Heavy Particle Therapy and Radiation Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan); Nakamura, Katsumasa; Sasaki, Tomonari; Ohga, Saiji; Nonoshita, Takeshi [Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan); Yoshitake, Tadamasa [Department of Heavy Particle Therapy and Radiation Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan); Ohnishi, Kayoko [Department of Radiology, National Center for Global Health and Medicine, Tokyo (Japan); Terashima, Kotaro; Matsumoto, Keiji [Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan); Hirata, Hideki [Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan); Honda, Hiroshi [Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka (Japan)

    2012-11-01

    Purpose: The purpose of this study was to clarify the incidence, the clinical risk factors, and the dose-volume relationship of radiation-induced rib fracture (RIRF) after hypofractionated stereotactic body radiation therapy (SBRT). Methods and Materials: One hundred sixteen patients treated with SBRT for primary or metastatic lung cancer at our institution, with at least 6 months of follow-up and no previous overlapping radiation exposure, were included in this study. To determine the clinical risk factors associated with RIRF, correlations between the incidence of RIRF and the variables, including age, sex, diagnosis, gross tumor volume diameter, rib-tumor distance, and use of steroid administration, were analyzed. Dose-volume histogram analysis was also conducted. Regarding the maximum dose, V10, V20, V30, and V40 of the rib, and the incidences of RIRF were compared between the two groups divided by the cutoff value determined by the receiver operating characteristic curves. Results: One hundred sixteen patients and 374 ribs met the inclusion criteria. Among the 116 patients, 28 patients (46 ribs) experienced RIRF. The estimated incidence of rib fracture was 37.7% at 3 years. Limited distance from the rib to the tumor (<2.0 cm) was the only significant risk factor for RIRF (p = 0.0001). Among the dosimetric parameters used for receiver operating characteristic analysis, the maximum dose showed the highest area under the curve. The 3-year estimated risk of RIRF and the determined cutoff value were 45.8% vs. 1.4% (maximum dose, {>=}42.4 Gy or less), 51.6% vs. 2.0% (V40, {>=}0.29 cm{sup 3} or less), 45.8% vs. 2.2% (V30, {>=}1.35 cm{sup 3} or less), 42.0% vs. 8.5% (V20, {>=}3.62 cm{sup 3} or less), or 25.9% vs. 10.5% (V10, {>=}5.03 cm{sup 3} or less). Conclusions: The incidence of RIRF after hypofractionated SBRT is relatively high. The maximum dose and high-dose volume are strongly correlated with RIRF.

  13. Evaluation of the iPhone with an acrylic sleeve versus the Scoliometer for rib hump measurement in scoliosis

    Directory of Open Access Journals (Sweden)

    Izatt Maree T

    2012-07-01

    Full Text Available Abstract Background Vertebral rotation found in structural scoliosis contributes to trunkal asymmetry which is commonly measured with a simple Scoliometer device on a patient's thorax in the forward flexed position. The new generation of mobile 'smartphones' have an integrated accelerometer, making accurate angle measurement possible, which provides a potentially useful clinical tool for assessing rib hump deformity. This study aimed to compare rib hump angle measurements performed using a Smartphone and traditional Scoliometer on a set of plaster torsos representing the range of torsional deformities seen in clinical practice. Methods Nine observers measured the rib hump found on eight plaster torsos moulded from scoliosis patients with both a Scoliometer and an Apple iPhone on separate occasions. Each observer repeated the measurements at least a week after the original measurements, and were blinded to previous results. Intra-observer reliability and inter-observer reliability were analysed using the method of Bland and Altman and 95% confidence intervals were calculated. The Intra-Class Correlation Coefficients (ICC were calculated for repeated measurements of each of the eight plaster torso moulds by the nine observers. Results Mean absolute difference between pairs of iPhone/Scoliometer measurements was 2.1 degrees, with a small (1 degrees bias toward higher rib hump angles with the iPhone. 95% confidence intervals for intra-observer variability were +/- 1.8 degrees (Scoliometer and +/- 3.2 degrees (iPhone. 95% confidence intervals for inter-observer variability were +/- 4.9 degrees (iPhone and +/- 3.8 degrees (Scoliometer. The measurement errors and confidence intervals found were similar to or better than the range of previously published thoracic rib hump measurement studies. Conclusions The iPhone is a clinically equivalent rib hump measurement tool to the Scoliometer in spinal deformity patients. The novel use of plaster torsos as rib

  14. Delayed life-threatening hemothorax without rib fractures after blunt chest trauma

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    Chinnan Nevin

    2006-01-01

    Full Text Available Delayed hemothorax in blunt chest trauma is described as a late presentation of hemothorax after a normal chest X-ray on admission. To detect this clinical entity a repeat chest X-ray is advised after six hours, especially when the first radiograph reveals rib or thoracic vertebral fractures or any significant injury to the thoracic viscera. However, this repeats chest X-ray examination is often not done in patients in whom a significant thoracic trauma has been excluded in the primary and secondary survey. Here, we discuss a case of massive delayed hemothorax after 16 hours of the blunt chest trauma despite a near normal admission chest X-ray and absence of significant chest trauma in the primary and secondary surveys.

  15. Predator-prey interactions between blue crabs and ribbed mussels living in clumps

    Science.gov (United States)

    Lin, Junda

    1991-01-01

    Predator-prey interactions between blue crabs ( Callinectes sapidus) and ribbed mussels ( Geukensia demissa) were studied by manipulating different components of mussel clump structure in the laboratory to test their effects on the mussels' susceptibility to crab predation. Mussels with stronger attachment strength or those buried deeper in the sediment suffered lower mortality. Blue crabs showed no significant size selectivity when two size classes of mussles (30-40 and 50-60 mm in shell heights) were offered. When juvenile mussels were attached to adult conspecifics and completely buried in the centres of clumps as in the field, blue crabs did not actively search for them. The crabs, however, did consume juveniles as by-products when they preyed upon the adult mussels to which the juveniles were attached.

  16. Recent results from the Louvain-la-Neuve RIB-facility

    CERN Document Server

    Ryckewaert, G; Gaelens, M; Loiselet, M; Postiau, N

    2002-01-01

    At the end of 1999, a first on-line RIB was accelerated, extracted and separated with the new cyclotron, CYCLONE44. An efficiency of 7% (from ion source exit to experiment target), resulting in 6x10 sup 8 pps of sup 1 sup 9 Ne sup 3 sup + , was obtained. Up to 9 kW of beam power has been put on the LiF target giving increased intensities for sup 6 He, sup 1 sup 8 Ne and sup 1 sup 5 O. A new accelerated and pure sup 7 Be-beam of 2x10 sup 7 pps has been produced, using the sputtering electrode in the ECR-source. Production tests of sup 1 sup 4 O using CYCLONE110 have started in view of their acceleration with CYCLONE44.

  17. Lipoma parosteal de arco costal: relato de caso Parosteal lipoma of the rib: a case report

    Directory of Open Access Journals (Sweden)

    Celso Montenegro Turtelli

    2005-08-01

    Full Text Available Os autores relatam o caso de um paciente com história de tumoração na região subaxilar esquerda, de crescimento progressivo, com início há vários anos. A radiografia e a tomografia computadorizada evidenciaram lesão expansiva com densidade menor do que partes moles adjacentes, com contornos bem definidos, contígua ao quinto arco costal esquerdo, com ossificações irregulares em seu interior. Histologicamente, foi diagnosticado lipoma parosteal, um raro tumor benigno de crescimento lento.The authors report a case of a patient with a progressive-growing mass in the left subaxillary region, since childhood. Chest x-ray and computed tomography showed a well-defined low attenuation mass with irregular calcifications contiguous with the left fifth rib. Histological findings were consistent with parosteal lipoma, a rare slow-growing benign tumor.

  18. Genetic analysis of jumbled spine and ribs (Jsr) mutation affecting the vertebral development in mice.

    Science.gov (United States)

    Okano, Shinya; Asano, Atsushi; Kon, Yasuhiro; Miyoshi, Hiroyuki; Watanabe, Tomomasa

    2002-10-01

    The jumbled spine and ribs (Jsr) mouse was derived from a spontaneous mutation. As the phenotype, a shortened trunk and kinky tail are characteristic Jsr traits. In this study, on high resolution mapping it was found that Lunatic fringe (Lfng) mapped at the same position as Jsr. Lfng was identified as the candidate gene for Jsr, but sequence analysis of this gene revealed no substitution in the coding region of cDNA. Therefore, we adopted the strategy of positional cloning for Jsr using a mouse bacterial artificial chromosome (BAC) library. A BAC contig was constructed from three BAC clones showing positive signals of Lfng and 11MMHAP75FRD8.seq near the Jsr locus on chromosome 5. Based on the genetic mapping of both T7 and sp6 ends of a clone of BAC382-O-7 (BAC382), the Jsr gene was considered to exist in BAC382 and to be positioned near the sp6 side. PMID:12392169

  19. Process Design for Hot Forging of Asymmetric to Symmetric Rib-web Shaped Steel

    Directory of Open Access Journals (Sweden)

    H. Cho

    2003-01-01

    Full Text Available The process design of hot forging, asymmetric to symmetric rib-web shaped steel, which is used for the turnout of express rails has been studied. Owing to the great difference in shape between the initial billet and the final forged product, it is impossible to hot forge the rail in a single stage operation. Therefore, multi stage forging and also die design for each stage are necessary for the production process. The numerical simulation for hot forging of asymmetric shape to symmetric shape was carried out using commercial FEM code, DEFORMTM-2D. Modification of the design and repeated simulation was carried out on the basis of the simulation results. For comparison with the simulation results, a flow analysis experiment using plasticine was also carried out. The results of the flow analysis experiment showed good agreement with those of the simulation.

  20. The use of lasers for the selective ionization of radionuclei for RIB generation

    International Nuclear Information System (INIS)

    The method of laser resonance step-wise ionization of atoms is used for radioactive ion beams production. Two types of selective laser ion sources (LIS) are applied at on-line mass-separators: a buffer gas cell LIS and a hot cavity LIS. These sources provide both high selectivity and high efficiency of the ionization process. At the ISOLDE/CERN facility short-lived isotopes of Ag, Mn, Zn, Be, Ni, Cu were studied using a hot cavity LIS and a system of pulsed copper vapor and dye lasers. RIBs of a dozen different elements have been generated with the LIS technique, while such possibility exists for about 80% of the total number of chemical elements

  1. Experimental study on heat transfer augmentation for high heat flux removal in rib-roughened narrow channels

    International Nuclear Information System (INIS)

    Frictional pressure drop and heat transfer performance in a very narrow rectangular channel having one-sided constant heat flux and repeated-ribs for turbulent flow have been investigated experimentally, and their experimental correlations were obtained using the least square method. The rib pitch-to-height ratios(p/k) were 10 and 20 while holding the rib height constant at 0.2mm, the Reynolds number(Re) from 2,414 to 98,458 under different channel heights of 1.2mm, 2.97mm, and 3.24mm, the rib height-to-channel equivalent diameter(k/De) of 0.03, 0.04, and 0.09 respectively. The results show that the rib-roughened surface augments heat transfer 2-3 times higher than that of the smooth surface with the expense of 2.8-4 times higher frictional pressure drop under Re=5000-105, p/k=10, and H=1.2mm. Experimental results obtained by channel height, H=1.2mm shows a little bit higher heat transfer and friction factor performance than the higher channel height, H=3.24mm. The effect of fin and consequently higher turbulence intensity are responsible for producing higher heat transfer rates. The obtained correlations could be used to design the cooling passages between the target plates to remove high heat flux up to 12MW/m2 generated at target plates in a high-intensity proton accelerator system. (author). 54 refs

  2. Rib cage deformities alter respiratory muscle action and chest wall function in patients with severe osteogenesis imperfecta.

    Directory of Open Access Journals (Sweden)

    Antonella LoMauro

    Full Text Available BACKGROUND: Osteogenesis imperfecta (OI is an inherited connective tissue disorder characterized by bone fragility, multiple fractures and significant chest wall deformities. Cardiopulmonary insufficiency is the leading cause of death in these patients. METHODS: Seven patients with severe OI type III, 15 with moderate OI type IV and 26 healthy subjects were studied. In addition to standard spirometry, rib cage geometry, breathing pattern and regional chest wall volume changes at rest in seated and supine position were assessed by opto-electronic plethysmography to investigate if structural modifications of the rib cage in OI have consequences on ventilatory pattern. One-way or two-way analysis of variance was performed to compare the results between the three groups and the two postures. RESULTS: Both OI type III and IV patients showed reduced FVC and FEV(1 compared to predicted values, on condition that updated reference equations are considered. In both positions, ventilation was lower in OI patients than control because of lower tidal volume (p<0.01. In contrast to OI type IV patients, whose chest wall geometry and function was normal, OI type III patients were characterized by reduced (p<0.01 angle at the sternum (pectus carinatum, paradoxical inspiratory inward motion of the pulmonary rib cage, significant thoraco-abdominal asynchronies and rib cage distortions in supine position (p<0.001. CONCLUSIONS: In conclusion, the restrictive respiratory pattern of Osteogenesis Imperfecta is closely related to the severity of the disease and to the sternal deformities. Pectus carinatum characterizes OI type III patients and alters respiratory muscles coordination, leading to chest wall and rib cage distortions and an inefficient ventilator pattern. OI type IV is characterized by lower alterations in the respiratory function. These findings suggest that functional assessment and treatment of OI should be differentiated in these two forms of the

  3. Floating anterior lens capsule: an unusual case of true exfoliation

    OpenAIRE

    Riffle, John

    2010-01-01

    A rare case of delamination and replication of the anterior lens capsule into prominent floating folds in the anterior chamber approximately 55 years after a penetrating injury to the eye and anterior lens capsule is reported. Classically, true exfoliation of the anterior lens capsule has been reported in individuals who have been exposed to intense heat over a prolonged period. However, more recently cases of true exfoliation of the anterior lens capsule have been reported in patients who ha...

  4. Aphasia following anterior cerebral artery occlusion

    International Nuclear Information System (INIS)

    We have report two cases of aphasia that had infarcts in the distribution of the left or right anterior cerebral artery, as confirmed by computed tomography. Case 1 is a right-handed, 65-year-old man in whom computerized tomographic scanning revealed an infarction of the territory of the left anterior cerebral artery after the clipping of the anterior communicating artery aneurysm. The standard language test of aphasia (SLTA) revealed non-fluent aphasia with dysarthria, good comprehension, almost normal repetition with good articulation, and a defectiveness in writing. This syndrome was considered an instance of transcortical motor aphasia. Although three years had passed from the onset, his aphasia did not show any improvement. Case 2 is a 37-year-old man who is right-handed but who can use his left hand as well. He was admitted because of subarachnoid hemorrhage from an anterior communicating aneurysm. Because of postoperative spasm, an infarction in the distribution of the right anterior cerebral artery developed. He was totally unable to express himself vocally, but he could use written language quite well to express his ideas and had a good comprehension of spoken language. This clinical picture was considered that of an aphemia. After several weeks, his vocalization returned, but the initial output was still hypophonic. (J.P.N.)

  5. THYMOLIPOMA: A RARE, LARGE ANTERIOR MEDIASTINAL MASS

    Directory of Open Access Journals (Sweden)

    Premananth

    2015-07-01

    Full Text Available Thymolipoma is a rare benign tumor of anterior mediastinum, described by Lange in 1916. 1 Less than 200 cases have been reported worldwide. 2 It accounts for 2% to 9% of thymic tumours. 3 We report a case of thymolipoma in a 37 year s old male patient, who pre sented with cough, dys p nea, chest pain for 2 months. CT THORAX revealed a large anterior mediastinal mass extending in to right hemithorax arising from thymus gland, with multiple areas of fat density, no significant mediastinal adenopathy, complete collap se of right middle and lower lobe suggestive of thymolipoma. CT guided biopsy suggestive of thymic neoplasm. The tumour was removed enbloc through surgery. Histopathological examination of large mass lesion confirmed thymolipoma. We report this case to emp hasize the importance of considering thymolipoma as a differential diagnosis of anterior mediastinal mass, although rare.

  6. Upstream binding factor stabilizes Rib 1, the TATA-binding-protein-containing Xenopus laevis RNA polymerase I transcription factor, by multiple protein interactions in a DNA-independent manner.

    OpenAIRE

    Bodeker, M; Cairns, C; McStay, B

    1996-01-01

    Initiation of RNA polymerase I transcription in Xenopus laevis requires Rib 1 and upstream binding factor (UBF). UBF and Rib 1 combine to form a stable transcription complex on the Xenopus ribosomal gene promoter. Here we show that Rib 1 comprises TATA-binding protein (TBP) and TBP-associated factor components. Thus, Rib 1 is the Xenopus equivalent of mammalian SL 1. In contrast to SL 1, Rib 1 is an unstable complex that readily dissociates into TBP and associated components. We identify a no...

  7. Anterior tooth relations in Kenyan Africans.

    Science.gov (United States)

    Hassanali, J; Pokhariyal, G P

    1993-04-01

    Dental plaster casts of 235 Maasai, 116 Kikuyu and 61 Kalenjin children aged 3-16 yr were studied to determine the incidence and magnitude of diastemas, overbite, overjet and anterior open bite. The highest prevalence of diastema was amongst the Maasai (61.3%), of overbite (84%) and overjet (99%) amongst the Kikuyu, and of anterior open bite amongst Kalenjin (24%), with values greater than 0.4 mm up to 11.5 mm. Comparison of the mean values showed that diastema (1.77 mm) and overjet (4.4 mm) were greatest in Maasai, overbite (3.53 mm) in Kalenjin, and anterior open bite (3.50 mm) in Kikuyu. In the total sample, the prevalence and mean of diastema were 49%, 1.68 mm; of overbite 77.4%, 2.96 mm; of overjet 88.6%, 3.83 mm; and of anterior open bite 16.5%, 2.69 mm (with values between 0.4-11.5 mm), while 5.5% had an edge-to-edge bite (-0.5-0.5 mm). The prevalence of diastema decreased whilst its magnitude increased with age. The mean values of overbite and overjet increased, while those for anterior open bite decreased with age. The mean values of diastema, overbite and overjet were greater amongst the females, but the difference was significant only for overjet. The high prevalence and greater values of measurements of anterior tooth relations may be related to variable growth of the bimaxillary dentoalveolar complex and soft tissue influences. This may be important in orthodontic treatment planning, dental prostheses and other clinical dental treatments in Kenyan populations. PMID:8517805

  8. ANTERIOR OSTEOPHYTE IDENTIFICATION IN CERVICAL VERTEBRAE

    Directory of Open Access Journals (Sweden)

    A. T. Chougale

    2011-06-01

    Full Text Available Radiologist always examines X-ray to determine abnormal changes in cervical, lumbar & thoracic vertebrae. Osteophyte (bony growth may appear at the corners of vertebrae so that vertebral shape becomes abnormal. This paper presents the idea from Image processing techniques such as customised Hough transform which will be used for segmentation which should be independent of rotation, scale, noise & shape. This segmented image will be then used for computing size invariant, convex hull based features to differentiate normal cervical vertebrae from cervical vertebrae containing anterior osteophyte. This approach effectively finds anterior osteophytes in cervical vertebrae.

  9. Roentgenographic findings following anterior cervical fusion

    International Nuclear Information System (INIS)

    We reviewed the pre- and postoperative lateral cervical roentgenograms in 90 patients who had anterior fusions and compared their findings with age and sex-matched people without neck problems. The average interval from surgery to review was 5 years. Preoperatively, all patients had a higher incidence of degenerative spondylosis at the levels to be fused than their asymptomatic counterparts. Postoperatively, there was no difference in the incidence of degenerative change between the operated and the control group at the levels above and below the fusion with the exception of anterior osteophyte formation which was more frequent in those with fusions. (orig.)

  10. Invasive amebiasis and ameboma formation presenting as a rectal mass: An uncommon case of malignant masquerade at a western medical center

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A 54-year-old man presented with rectal pain and bleeding secondary to ulcerated, necrotic rectal and cecal masses that resembled colorectal carcinoma upon colonoscopy. These masses were later determined to be benign amebomas caused by invasive Entamoeba histolytica, which regressed completely with medical therapy. In Western countries, the occurrence of invasive protozoan infection with formation of amebomas is very rare and can mistakenly masquerade as a neoplasm. Not surprisingly, there have been very few cases reported of this clinical entity within the United States. Moreover, we report a patient that had an extremely rare occurrence of two synchronous lesions, one involving the rectum and the other situated in the cecum. We review the current literature on the pathogenesis of invasive E. Histolytica infection and ameboma formation, as well as management of this rare disease entity at a western medical center.

  11. Non-Hodgkin′s lymphoma "masquerading" as Pott′s disease in a 13-year old boy

    Directory of Open Access Journals (Sweden)

    Olasunkanmi Abdulrasheed Adegboye

    2011-01-01

    Full Text Available Lymphomas are malignant neoplasms of the lymphoid lineage. They are broadly classified as either Hodgkin disease or as non-Hodgkin lymphoma (NHL. Burkitt′s lymphoma, a variety of NHL, is significantly most common in sub-Saharan Africa, where it accounts for approximately one half of childhood cancers. Lymphoblastic lymphoma is less common. A case of paravertebral high grade non-Hodgkin′s lymphoma (lymphoblastic lymphoma "masquerading" as Pott′s disease in a 13-year-old child is reported. The present report was informed by the unusual presentation of this case and the intent of increasing the index of diagnostic suspicion. A brief appraisal is provided of the clinical parameters, management strategies and challenges. AT was a 13-year boy that presented on account of a slowly evolving and progressively increasing hunch on the back and inability to walk over 4 and 8 months duration, respectively. There was subsequent inability to control defecation and urination. There was no history of cough. He and his twin brother lived with their paternal grandfather who had chronic cough with associated weight loss. The grandfather died shortly before the child′s admission. The child had no BCG immunization. The essential findings on examination were in keeping with lower motor neurons (LMN paralysis of the lower limbs. The upper limbs appeared normal. There was loss of cutaneous sensation from the umbilicus (T10 downward. There was a firm, (rather tense, non-tender non-pulsatile, smooth swelling over the mid-third of the back (T6-L1 the mass had no differential warmth. It measures about 20×12 cm. Chest radiograph showed no active focal lung lesion, but the thoraco-lumbar spine showed a vertebral planner at L1 and a wedged collapse of T11-T12 vertebrae. There was sclerosis of the end plates of all the vertebral bodies with associated reduction in the bone density. He had an excision biopsy on the 90th day on admission, following which his clinical

  12. Perawatan Ortodontik Gigi Anterior Berjejal dengan Tulang Alveolar yang Tipis

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    Miesje K. Purwanegara

    2015-09-01

    Full Text Available Anterior teeth movement in orthodontic treatment is limited to labiolingual direction by very thin alveolar bone. An uncontrolled anterior tooth movement to labiolingual direction can cause alveolar bone perforation at its root segment. This case report is to remind us that alveolar bone thickness limits orthodontc tooth movement. A case of crowded anterior teeth with thin alveolar bone in malocclusion I is reported. This case is treated using adgewise orthodontic appliance. Protraction of anterior teeth is anticipated due to thin alveolar bone on the anterior surface. The conclusion is although the alveolar bone surrounding the crowded anterior teeth is thin, by controlling the movement the teeth reposition is allowed.

  13. Anterior retropharyngeal approach to the cervical spine.

    Directory of Open Access Journals (Sweden)

    Behari S

    2001-10-01

    Full Text Available The anterior retropharyngeal approach (ARPA accesses anteriorly situated lesions from the clivus to C3, in patients with a short neck, Klippel Feil anomaly or those in whom the C2-3 and C3-4 disc spaces are situated higher in relation to the hyoid bone and the angle of mandible where it is difficult to approach this region using the conventional anterior approach, due to the superomedial obliquity of the trajectory. The ARPA avoids the potentially contaminated oropharyngeal cavity providing for a simultaneous arthrodesis and instrumentation during the primary surgical procedure. Experience of five patients with high cervical extradural compression, who underwent surgery using this approach between 1994 and 1999, is presented. The surgical procedures included excision of ossified posterior longitudinal ligament (n=2; excision of prolapsed disc and osteophytes (n=2; and excision of a vertebral body neoplasm (n=1. Following the procedure, vertebral arthrodesis was achieved using an iliac graft in all the patients. Only one patient with vertebral body neoplasm required an additional anterior cervical plating procedure for stabilisation the construct. The complications included transient respiratory insufficiency and neurological deterioration in two patients; and, pharyngeal fistula and donor site infection in one patient.

  14. Treatment for acute anterior cruciate ligament tear

    DEFF Research Database (Denmark)

    Frobell, Richard B; Roos, Harald P; Roos, Ewa M; Roemer, Frank W; Ranstam, Jonas; Lohmander, Stefan

    2013-01-01

    To compare, in young active adults with an acute anterior cruciate ligament (ACL) tear, the mid-term (five year) patient reported and radiographic outcomes between those treated with rehabilitation plus early ACL reconstruction and those treated with rehabilitation and optional delayed ACL...

  15. Anterior Chamber Live Loa loa: Case Report.

    Science.gov (United States)

    Kagmeni, G; Cheuteu, R; Bilong, Y; Wiedemann, P

    2016-01-01

    We reported a case of unusual intraocular Loa loa in a 27-year-old patient who presented with painful red eye. Biomicroscopy revealed a living and active adult worm in the anterior chamber of the right eye. After surgical extraction under local anesthesia, parasitological identification confirmed L. loa filariasis. PMID:27441005

  16. Anterior Chamber Live Loa loa: Case Report

    Science.gov (United States)

    Kagmeni, G.; Cheuteu, R.; Bilong, Y.; Wiedemann, P.

    2016-01-01

    We reported a case of unusual intraocular Loa loa in a 27-year-old patient who presented with painful red eye. Biomicroscopy revealed a living and active adult worm in the anterior chamber of the right eye. After surgical extraction under local anesthesia, parasitological identification confirmed L. loa filariasis. PMID:27441005

  17. Novel Insights into Anterior Cruciate Ligament Injury

    NARCIS (Netherlands)

    D.E. Meuffels (Duncan)

    2011-01-01

    textabstractAnterior cruciate ligament (ACL) injury is one of the most common sports injuries of the knee. ACL reconstruction has become, standard orthopaedic practice worldwide with an estimated 175,000 reconstructions per year in the United States.6 The ACL remains the most frequently studied liga

  18. Anorgasmia in anterior spinal cord syndrome.

    OpenAIRE

    Berić, A; Light, J K

    1993-01-01

    Three male and two female patients with anorgasmia and dissociated sensory loss due to an anterior spinal cord syndrome are described. Clinical, neurophysiological and quantitative sensory evaluation revealed preservation of the large fibre dorsal column functions from the lumbosacral segments with concomitant severe dysfunction or absence of the small fibre neospinothalamic mediated functions. These findings indicate a role for the spinothalamic system in orgasm.

  19. Anterior process fractures of the calcaneus

    Energy Technology Data Exchange (ETDEWEB)

    Renfrew, D.L.; El-Khoury, G.Y.

    1985-07-01

    Fractures of the anterior process of the calcaneus are often missed. This error follows from the tendency to focus exclusively on the mortise and malleoli when a history of ankle trauma is supplied. Seven patients with this fracture are presented. The anatomy, mechanism of injury, clinical presentation, and the radiographic features of this injury are discussed.

  20. Causes of anterior cruciate ligament injuries

    Directory of Open Access Journals (Sweden)

    Ristić Vladimir

    2010-01-01

    Full Text Available In order to prevent anterior cruciate ligament injuries it is necessary to define risk factors and to analyze the most frequent causes of injuries - that being the aim of this study. The study sample consisted of 451 surgically treated patients, including 400 sportsmen (65% of them being active and 35% recreational sportsmen, 29% female and 71% male; of whom 90% were younger than 35. Sports injuries, as the most frequent cause of anterior cruciate ligament injuries, were recorded in 88% of patients (non-contact ones in 78% and contact ones in 22%, injuries occurring in everyday activities in 11% and in traffic in 1%. Among sportsmen, reconstruction of the anterior cruciate ligament was most frequently performed in football players (48%, then in handball players (22%, basketball players (13%, volleyball players (8%, martial arts fighters (4%. However, the injury incidence was the highest among the active basketball players (1 injured among 91 active players. Type of footwear, warming up before the activity, genetic predisposition and everyday therapy did not have a significant influence on getting injured. Anterior cruciate ligament injuries happened three times more often during matches, in the middle and at the end of a match and training session (79%, at landing after the jump or when changing direction of movement (75% without a contact with other competitors, on dry surfaces (79%, among not so well prepared sportsmen.

  1. Study on frictional pressure drop of steam-water two phase flow in optimized four-head internal-ribbed tube

    International Nuclear Information System (INIS)

    The optimized internal-ribbed tube is different from the normal internal-ribbed tube on the frictional pressure drop characteristics. The frictional pressure drop characteristics of steam-water two phase flow in horizontal four-head optimized internal-ribbed were studied under adiabatic condition. According to the experimental and calculation results, the two-phase multiplier is greatly affected by the steam quality and pressure. The two-phase multiplier increases with increasing quality, and decreases with increasing pressure. In the near-critical pressure region, the two-phase multiplier is close to 1. The frictional pressure drop of two phase flow in optimized tube is less than that in the normal tube under the same work condition. The good hydrodynamic condition could be achieved when the optimized internal-ribbed tube is used in the heat transfer equipment because the self-compensating characteristics exist due to the reduction of frictional pressure drop. (authors)

  2. Comparison Thoracic Epidural and Intercostal Block to Improve Ventilation Parameters and Reduce Pain in Patients with Multiple Rib Fractures

    Directory of Open Access Journals (Sweden)

    Raheleh Aligholipour Maleki

    2011-08-01

    Full Text Available Introduction: Chest wall blunt trauma causes multiple rib fractures and will often be associated with significant pain and may compromise ventilator mechanics. Analgesia has great roll in rib fracture therapies, opioid are useful, but when used as sole agent may re-quire such high dose that they produce respiratory depression, especially in el-derly .the best analgesia for a severe chest wall injury is a continuous epidural infusion of local anesthetic. This provides complete analgesia allowing inspiration and coughing without of the risk of respiratory depression. Methods: sixty adult patients who with multiple rib fractures were enrolled in this study. They were divided into Group A or thoracic epidural with bupivacaine 0.125 % +1mg/5ml morphine and group B or inter-costal block with %0.25 bupivacaine. The patients were assessed through ICU and hos-pital stay length, ventilation function tests. Pain score among the patients was meas-ured with verbal rating scale, before and after administration of the analgesia. Results: We found a significant improvement in ventilatory function tests during the 1st, 2nd, and 3rd days after epidural analgesia compared with the intercostal block (P < 0.004. Changes in the visual Analogue Scale were associated with marked improvement re-garding pain at rest and pain caused by coughing and deep breathing in group A com-pared group B... ICU and hospital stay markedly reduced in Group A. Conclusion: tho-racic epidural analgesia is superior to intercostals block regarding pain relief of rib frac-tures. Patients who received epidural analgesia had significantly lower pain scores at all studied times.

  3. Finite Element Analysis of Composite Deck Slab Using Perfobond Rib as Shear Connection System under Vertical Loading

    Directory of Open Access Journals (Sweden)

    Omid Monshi Toussi

    2016-01-01

    Full Text Available Nowadays, the composite decks are very common to use in composite or steel construction. In this case of study the composite slabs have been investigated numerically by Finite Element Method (FEM. Five composite slabs were analyzed using finite element software LUSAS. The deflection of each model were obtained and compared with experimental test. Results showed a good agreement with the experimental data and indicate that the perfobond rib is appropriate shear connector for the bridges decks.

  4. A single-lithography SOI rib waveguide sensing circuit with apodized low back-reflection surface grating fiber coupling

    OpenAIRE

    Dubois, Valentin J.; Antelius, Mikael; Sohlström, Hans; Gylfason, Kristinn B.

    2012-01-01

    We present a single-lithography Mach-Zehnder interferometer sensor circuit, with integrated low back-reflection input and output grating couplers. The low back-reflection is accomplished by a duty cycle apodization optimized for coupling light between single-mode silica fibers and the nanometric silicon-on-insulator (SOI) rib-waveguides. We discuss the design, fabrication, and characterization of the circuit. The apodization profile of the gratings is algorithmically generated using eigenmode...

  5. Modelling of a DBR laser based on Raman effect in a silicon-on-insulator rib waveguide

    International Nuclear Information System (INIS)

    In this paper, third-order nonlinearities in silicon-on-insulator rib waveguides are investigated to obtain complete modelling, describing the behaviour of a stimulated Raman scattering based laser. The simulations of a distributed Bragg reflector laser operation in a time domain allow for the first time to study in detail the dependence of threshold and output powers on different device parameters. Both continuous wave and pulsed laser operations are theoretically demonstrated, as well as their dependence on device parameters

  6. Bone mineral density, rib pain and other features of the female athlete triad in elite lightweight rowers

    OpenAIRE

    Dimitriou, Lygeri; Weiler, Richard; Lloyd-Smith, Rebecca; Turner, Anthony N.; Heath, Luke; James, Nic; Reid, Anna

    2014-01-01

    Objective: To determine bone mineral density (BMD) and the associations among BMD, menstrual history, disordered eating (DE), training history, intentional weight loss (IWL) and rib pain for the first time in female lightweight rowers. Setting: 9 lightweight rowing clubs, UK. Participants: 29 Caucasian female lightweight rowers volunteered. 21 (12 active, 9 retired) completed the study. Inclusion criteria: female lightweight rowers aged over 18 years. Exclusion crit...

  7. EBF3GLWingOpt: A Framework for Multidisciplinary Design Optimization of Wings Using SpaRibs

    OpenAIRE

    Liu, Qiang

    2014-01-01

    A global/local framework for multidisciplinary optimization of generalized aircraft wing structure has been developed. The concept of curvilinear stiffening members (spars, ribs and stiffeners) has been applied in the optimization of a wing structure. A global wing optimization framework EBF3WingOpt, which integrates the static aeroelastic, flutter and buckling analysis, has been implemented for exploiting the optimal design at the wing level. The wing internal structure is optimized using cu...

  8. Comparison of the Analgesic Effect of Intravenous Acetaminophen and Morphine Sulfate in Rib Fracture; a Randomized Double-Blind Clinical Trial

    OpenAIRE

    Esmailian, Mehrdad; Moshiri, Roshanak; Zamani, Majid

    2015-01-01

    Introduction: Rib fracture is one of the common causes of trauma disabilities in many events and the outcome of these patients are very extensive from temporary pain management to long-term significant disability. Control and management of the pain in such patients is one of the most important challenges in emergency departments. Thus, the aim of the present study was assessing the efficacy of IV acetaminophen in pain control of patients with rib fracture. Methods: In this double-blind clinic...

  9. Ketamine Infusion Therapy as an Alternative Pain Control Strategy in Patients with Multi-Trauma including Rib Fracture; Case Report and Literature Review

    OpenAIRE

    Ashley K Losing; Justin M Jones; Adis Keric; Steven E Briggs; Leedahl, David D.

    2016-01-01

    Ketamine is a promising alternative agent for pain control that offers benefit to traditional strategies, particularly in the setting of rib fracture. Current pharmacologic therapies have clear adverse effects, and other options may be invasive, cost prohibitive, or marginally effective. We describe three consecutive patients with traumatic injuries including rib fracture for which a ketamine infusion was utilized as part of their pain control strategy. For each patient, use of a ketamine in...

  10. Anterior ethmoidal artery emerging anterior to bulla ethmoidalis: An abnormal anatomical variation in Waardenburg's syndrome

    OpenAIRE

    Wong, Danny K. C.; Shao, Angus; Campbell, Raewyn; Douglas, Richard

    2014-01-01

    In endoscopic sinus surgery, the anterior ethmoidal artery (AEA) is usually identified as it traverses obliquely across the fovea ethmoidalis, posterior to the bulla ethmoidalis and anterior to or within the ground lamella's attachment to the skull base. Injury to the AEA may result in hemorrhage, retraction of the AEA into the orbit, and a retrobulbar hematoma. The resulting increase in intraorbital pressure may threaten vision. Waardenburg's syndrome (WS) is a rare congenital, autosomal dom...

  11. Accuracy of Lachman and Anterior Drawer Tests for Anterior Cruciate Ligament Injuries

    OpenAIRE

    Hadi Makhmalbaf; Ali Moradi; Saeid Ganji; Farzad Omidi-Kashani

    2013-01-01

      Background: The knee joint is prone to injury because of its complexity and weight-bearing function. Anterior cruciate ligament (ACL) ruptures happen in young and physically active population and can result in instability, meniscal tears, and articular cartilage damage. The aim of this study is to evaluate the accuracy of Lachman and anterior drawer test in ACL injury in compare with arthroscopy.   Methods: In a descriptive, analytical study from 2009 to 2013, 653 patients who were suspecte...

  12. The anterior insular and anterior cingulate cortices in emotional processing for self-face recognition

    OpenAIRE

    Morita, Tomoyo; Tanabe, Hiroki C.; Akihiro T Sasaki; Shimada, Koji; Kakigi, Ryusuke; Sadato, Norihiro

    2013-01-01

    Individuals can experience embarrassment when exposed to self-feedback images, depending on the extent of the divergence from the internal representation of the standard self. Our previous work implicated the anterior insular cortex (AI) and the anterior cingulate cortex (ACC) in the processing of embarrassment; however, their exact functional contributions have remained uncertain. Here, we explored the effects of being observed by others while viewing self-face images on the extent of embarr...

  13. Silicon rib waveguide electro-absorption optical modulator using transparent conductive oxide bilayer

    Science.gov (United States)

    Ayata, Masafumi; Nakano, Yoshiaki; Tanemura, Takuo

    2016-04-01

    We propose a novel ultra compact electro-absorption optical modulator based on a silicon rib waveguide and numerically demonstrate its performance. The proposed design employs two types of transparent conductive oxide (TCO) layers with different carrier densities to achieve both high modulation efficiency and low optical insertion loss. The thin TCO layer with high carrier density enables efficient modulation through the metal-oxide-semiconductor structure. On the other hand, the upper TCO layer with low carrier density allows low-resistance electrical contact for the top electrode without large optical loss. Using an indium tin oxide bilayer with optimized carrier densities, we numerically demonstrate a 4.3 dB extinction ratio and a 2.6 dB optical insertion loss with 1 µm device length. We estimate that the modulator operates under a low driving voltage of 1.3 V, exhibiting an ultra low energy consumption of 22.5 fJ/bit and a broad RC modulation bandwidth of over 40 GHz.

  14. Mechanical design and development of analyzing magnet for the RIB charge breeder beam line

    International Nuclear Information System (INIS)

    An iron dominated analyzing magnet of uniform peak field 0.6 T has been developed for Radioactive Ion Beam (RIB) charge breeder beam line at VECC, Kolkata. It has two room temperature coils made of copper having channels for passage of cooling water. The other important parts of the magnet includes two yokes, two poles, vacuum chamber, view port, iron plates and the support structures. The most important properties of magnets designed and fabricated for this application is the need for high field quality. The magnet assembly has got overall dimensions of 1.1 metres x 0.91 metres x 0.63 metres and the required field uniformity is 6 x 10-4 over pole width of ± 2.5 cm. The most critical parameter that has to be maintained to achieve the desired magnetic field is the pole gap of 80 ± 0.25 rom.This paper describes in detail about the mechanical design, coil cooling analysis, development and assembly of this magnet. (author)

  15. Design of the IXO optics based on thin glass plates connected by reinforcing ribs

    Science.gov (United States)

    Parodi, G.; Martelli, F.; Basso, S.; Citterio, O.; Civitani, M.; Conconi, P.; Ghigo, M.; Pareschi, G.; Zambra, A.

    2011-09-01

    Effective area requirements for the large X-ray mirror of the International X-ray Observatory (IXO) are about 3 m2 at 1keV, 0.65 m2 at 6 keV and 150 cm2 at 30 keV. Because of its large dimension, the telescope cannot be realized as a monolithic structure but rather it requires the integration and assembly in the telescope optical bench of a number of basic module units, called X-ray Optical Unit (XOU). We are currently studying a method for the production of these basic units that is based on the slumping technology for the production of thin glass segmented mirrors. It foresees the implementation of a stacking integration concept based on the use of reinforcing ribs connecting the glass segments in order to create very stiff structures. This paper reports on the last design of the single optical module and describe the results of FEM analyses that show how it is possible to use an innovative approach to the integration of the slumped glass foils.

  16. Effect of rib fat thickness on the quality of aged meat from Nellore young bulls

    Directory of Open Access Journals (Sweden)

    Erick Escobar Dallantonia

    2015-05-01

    Full Text Available This trial aimed to evaluate the quality of aged beef from Nellore young bulls under two yield grade (YG. Fourteen animals with approximately 450 ± 30 kg body weight were evaluated for backfat thickness (BFT at the beginning of the experimental period. Seven animals had BFT of 0-3 mm and seven animals, 3.1-6 mm. Two groups were formed at the end of the experiment: animals finished with 3-6 mm BFT (seven animals and animals finished with 6.1 to 10 mm BFT (seven animals. Every 28 days, we evaluated by ultrasound the BFT between the 12nd 13rd ribs. There was no interaction between YG and aging for beef color, pH, cooking losses and shear force (p > 0.05. There was no effect of YG on sarcomere length (p = 0.11. However, there was interaction between YG and aging on water holding capacity (p < 0.01. The yield grades evaluated did not interfere with meat quality, but carcasses with 6.1 - 10 mm of backfat thickness showed highest water holding capacity. The aging of the longissimus muscle for up to 14 days improves beef tenderness.

  17. Numerical Simulation of Turbulent Fluid Flow and Heat Transfer in a Ribbed Rotating Two-Pass Square Duct

    Directory of Open Access Journals (Sweden)

    Liou Tong-Miin

    2005-01-01

    Full Text Available The local turbulent fluid flow and heat transfer in a rotating two-pass square duct with 19 pairs of in-line 90 ∘ ribs have been investigated computationally. A Reynolds-averaged Navier-Stokes equation (RANS with a two-layer k − ϵ turbulence model was solved. The in-line 90 ∘ ribs were arranged on the leading and trailing walls with rib height-to-hydraulic diameter ratio and pitch-to-height ratio of 0.136 and 10, respectively. The Reynolds number, based on duct hydraulic diameter and bulk mean velocity, was fixed at 1.0 × 10 4 whereas the rotational number varied from 0 to 0.2 . Results are validated with previous measured velocity field and heat transfer coefficient distributions. The validation shows that the effect of rotation on the passage-averaged Nusselt number ratio can be predicted reasonably well; nevertheless, the transverse mean velocity and, in turn, the distribution of regional-averaged Nusselt number ratio are markedly underpredicted in the regions toward which the Coriolis force is directed. Further CFD studies are needed.

  18. A case report of a patient with Ribbing disease underlines the connections between the skeletal and cardiovascular complications

    Directory of Open Access Journals (Sweden)

    Giuseppe Cocco

    2011-07-01

    Full Text Available A 69-year-old woman suffered from Ribbing disease, a hereditary X autosomal dominant disease with multiple sclerosing dysplasias. However, it is less known that the genetic mutation can often induce cardiovascular complications. The patient had a hypertensive cardiopathy and had been treated with percutaneous coronary angioplasty and stenting because of a myocardial infarction. She was seen because of dyspnea and we detected an aneurysm of the ascending thoracic aorta. The patient underwent surgical repair. In Ribbing disease an up-regulation of genes interferes with the production, processing, or formation of collagen type II and XI. These genetic effects are thought to be specific for osteoblasts and are responsible for the skeletal pathology. However, the defective synthesis of collagen can also induce cardiovascular complications which may be similar to those described in patients with type III Ehlers-Danlos syndrome, with type IV Marfan syndrome, and with osteogenesis imperfecta. Rheumatologists who treat patients with Ribbing disease should seek the advice of cardiologists for the occurrence of cardiovascular complications.

  19. Partial costectomy for tracheal collapse and stenosis associated with perinatal rib fracture in three Japanese Black calves.

    Science.gov (United States)

    Hidaka, Yuichi; Hagio, Mitsuyoshi; Kashiba, Ichiro; Ando, Kei; Otani, Yuki; Satoh, Hiroyuki; Konishi, Yuko; Tsuzuki, Nao; Hokamura, Junichi; Kajisa, Makoto; Wada, Mie; Kirino, Yumi; Asanuma, Taketoshi

    2016-04-01

    2.3-month-old (Case 1), one-month-old (Case 2) and 6-month-old (Case 3), Japanese Black calves presented with mild to severe wheezing. All calves had histories of dystocia at birth with breech presentation. Physical examination, thoracic radiography, endoscopy or computed tomography indicated wheezing associated with tracheal collapse and stenosis caused by perinatal rib fractures. Partial resection of the fractured first and second ribs was performed on all calves. The respiration in Cases 1 and 2 immediately improved after the surgery, while Case 3 required two weeks to improve. Cases 1 and 3 grew up healthy and were sold at auction, but Case 2 had a recurrence of wheezing at three months post-discharge and showed growth retarding. Partial costectomy may be an effective solution for control of respiration, however, further cases are required to discuss the criteria for surgical management and to obtain favorable postoperative prognosis in calves with tracheal collapse and stenosis caused by perinatal rib fractures. PMID:26522686

  20. Reconstruction of iliac crest with rib to prevent donor site complications: A prospective study of 26 cases

    Directory of Open Access Journals (Sweden)

    Dave B

    2007-01-01

    Full Text Available Background: The tricortical bone graft from the iliac crest are used to reconstruct the post corpectomy spinal defects. The donor iliac area defect is large and may give rise to pain at donor site, instability of pelvis, fracture of ilium, donor site muscle herniation or abdominal content herniation. Rib removed during thoracotomy was used by us to reconstruct the iliac crest defect. Materials and Methods: Twenty-six patients who underwent thoracotomy for dorsal spine corpectomy or curettage for various spinal pathologies from June 2002 to May 2004 were included in the study. After adequate decompression the spine was reconstructed by tricortical bone graft from iliac crest and reconstruction of the iliac crest was done with the rib removed for exposure during thoracotomy. Results: The mean follow up was 15 months. All patients had good graft incorporation which was evaluated on the basis of local tenderness and radiographs. One patient had graft displacement. Conclusion: The reconstruction of iliac crest by rib is a simple and effective procedure to prevent donor site complications.

  1. Birth-related mid-posterior rib fractures in neonates: a report of three cases (and a possible fourth case) and a review of the literature

    International Nuclear Information System (INIS)

    Posterior rib fractures in young children have a high positive predictive value for non-accidental injury (NAI). Combined data of five studies on birth trauma (115,756 live births) showed no cases of rib fractures resulting from birth trauma. There have, however, been sporadic cases reported in the literature. We present three neonates with both posterior rib fractures and ipsilateral clavicular fractures resulting from birth trauma. A review of the literature is also presented. The common denominator and a possible mechanical aetiology are discussed. In total, 13 cases of definitive birth-related posterior rib fractures were identified. Nearly all (9/10) posterior rib fractures were (as far as reported in the original publications) in the midline. In 12 of the 13 children, birth weight was high and in 7 children birth was complicated by shoulder dystocia. An interesting finding was that in cases where a clavicular fracture was present, this was on the ipsilateral side. Radiologists, when presented with a neonate with posterior rib fractures, should be aware of this rare differential diagnosis. (orig.)

  2. Heat Transfer and Friction Studies in a Tilted and Rib-Roughened Trailing-Edge Cooling Cavity with and without the Trailing-Edge Cooling Holes

    Directory of Open Access Journals (Sweden)

    M. E. Taslim

    2014-01-01

    Full Text Available Local and average heat transfer coefficients and friction factors were measured in a test section simulating the trailing-edge cooling cavity of a turbine airfoil. The test rig with a trapezoidal cross-sectional area was rib-roughened on two opposite sides of the trapezoid (airfoil pressure and suction sides with tapered ribs to conform to the cooling cavity shape and had a 22-degree tilt in the flow direction upstream of the ribs that affected the heat transfer coefficients on the two rib-roughened surfaces. The radial cooling flow traveled from the airfoil root to the tip while exiting through 22 cooling holes along the airfoil trailing-edge. Two rib geometries, with and without the presence of the trailing-edge cooling holes, were examined. The numerical model contained the entire trailing-edge channel, ribs, and trailing-edge cooling holes to simulate exactly the tested geometry. A pressure-correction based, multiblock, multigrid, unstructured/adaptive commercial software was used in this investigation. Realizable k-ε turbulence model in conjunction with enhanced wall treatment approach for the near wall regions was used for turbulence closure. The applied thermal boundary conditions to the CFD models matched the test boundary conditions. Comparisons are made between the experimental and numerical results.

  3. Anterior capsule tear after laser iridotomy complicating phacoemulsification

    OpenAIRE

    Vivien Cherng Hui, Yip; Sanjay, Srinivasan; Benjamin Chong-Ming, Chang

    2011-01-01

    A 70-year-old Indian lady had a history of bilateral laser peripheral iridotomy (LPI) for primary angle closure. Subsequently she developed cataract in both the eyes. Right eye cataract surgery was complicated by an anterior capsule rupture, which was discovered intra-operatively at the site of the LPI. Trypan blue was used to stain the anterior capsule to delineate the anterior capsule defect. An attempt at continuous curvilinear capsulorhexis was unsuccessful, and the anterior capsulotomy w...

  4. Radiation-induced rib fracture after stereotactic body radiotherapy with a total dose of 54–56 Gy given in 9–7 fractions for patients with peripheral lung tumor: impact of maximum dose and fraction size

    International Nuclear Information System (INIS)

    Radiation-induced rib fracture after stereotactic body radiotherapy (SBRT) for lung cancer has been recently reported. However, incidence of radiation-induced rib fracture after SBRT using moderate fraction sizes with a long-term follow-up time are not clarified. We examined incidence and risk factors of radiation-induced rib fracture after SBRT using moderate fraction sizes for the patients with peripherally located lung tumor. During 2003–2008, 41 patients with 42 lung tumors were treated with SBRT to 54–56 Gy in 9–7 fractions. The endpoint in the study was radiation-induced rib fracture detected by CT scan after the treatment. All ribs where the irradiated doses were more than 80% of prescribed dose were selected and contoured to build the dose-volume histograms (DVHs). Comparisons of the several factors obtained from the DVHs and the probabilities of rib fracture calculated by Kaplan-Meier method were performed in the study. Median follow-up time was 68 months. Among 75 contoured ribs, 23 rib fractures were observed in 34% of the patients during 16–48 months after SBRT, however, no patients complained of chest wall pain. The 4-year probabilities of rib fracture for maximum dose of ribs (Dmax) more than and less than 54 Gy were 47.7% and 12.9% (p = 0.0184), and for fraction size of 6, 7 and 8 Gy were 19.5%, 31.2% and 55.7% (p = 0.0458), respectively. Other factors, such as D2cc, mean dose of ribs, V10–55, age, sex, and planning target volume were not significantly different. The doses and fractionations used in this study resulted in no clinically significant rib fractures for this population, but that higher Dmax and dose per fraction treatments resulted in an increase in asymptomatic grade 1 rib fractures

  5. High intensity focused ultrasound (HIFU) therapy for local treatment of hepatocellular carcinoma: Role of partial rib resection

    Energy Technology Data Exchange (ETDEWEB)

    Zhu Hui; Zhou Kun; Zhang Lian; Jin Chengbin; Peng Song; Yang Wei; Li Kequan; Su Haibing [Clinical Center for Tumor Therapy of 2nd Hospital of Chongqing University of Medical Sciences, Chongqing 400010 (China); Chen Wenzhi [Clinical Center for Tumor Therapy of 2nd Hospital of Chongqing University of Medical Sciences, Chongqing 400010 (China); State Key Laboratory, Department of Biomedical Engineering, Chongqing University of Medical Sciences, Chongqing 400037 (China); Bai Jin; Wu Feng [State Key Laboratory, Department of Biomedical Engineering, Chongqing University of Medical Sciences, Chongqing 400037 (China); National Engineering and Research Center for Ultrasound Medicine, Chongqing 401121 (China); Wang, Zhibiao [Clinical Center for Tumor Therapy of 2nd Hospital of Chongqing University of Medical Sciences, Chongqing 400010 (China); State Key Laboratory, Department of Biomedical Engineering, Chongqing University of Medical Sciences, Chongqing 400037 (China); National Engineering and Research Center for Ultrasound Medicine, Chongqing 401121 (China)], E-mail: wangzhibiao@haifu.com.cn

    2009-10-15

    Objective: It has long been known that high intensity focused ultrasound (HIFU) can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible. Since the ribs have strong reflections to ultrasonic beams, they may affect the deposition of ultrasound energy, decreasing the efficacy of HIFU treatment and increasing the chance of adverse events when the intra-abdominal tumours concealed by ribs are treated. The aim of this study was to evaluate the influence of partial rib resection on the efficacy and safety of HIFU treatment. Methods: This prospective study was approved by the ethics committee at Chongqing University of Medical Sciences. An informed consent form was obtained from each patient and family member. A total of 16 patients with hepatocellular carcinoma (HCC), consisting of 13 males and 3 females, were studied. All patients had the successful HIFU treatment. To create a better acoustic pathway for HIFU treatment, all of the 16 patients had the ribs that shield the tumour mass to be removed. Magnetic resonance imaging (MRI) was used to evaluate the efficacy of HIFU treatment. Results: Sixteen cases had 23 nodules, including 12 cases with a single nodule, 1 case with 2 nodules, 3 cases with 3 nodules. The mean diameter of tumours was 7.0 {+-} 2.1 cm (5-10 cm). According to TNM classification, 9 patients were diagnosed as stage II, 4 patients were stage III, and 3 patients were stage IV. Follow-up imaging showed an absence of tumour blood supply and shrinkage of all treated lesions. The survival rates at 1, 2, 3, 4, and 5 years were 100%, 83.3%, 69.4%, 55.6%, and 55.6%, respectively. No serious complications were observed in the patients treated with HIFU. Conclusion: Partial rib resection can create a better acoustic pathway of HIFU therapy. Even though it is an invasive treatment, this measure offers patients an improved prospect of complete tumour ablation when no other treatment

  6. High intensity focused ultrasound (HIFU) therapy for local treatment of hepatocellular carcinoma: Role of partial rib resection

    International Nuclear Information System (INIS)

    Objective: It has long been known that high intensity focused ultrasound (HIFU) can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible. Since the ribs have strong reflections to ultrasonic beams, they may affect the deposition of ultrasound energy, decreasing the efficacy of HIFU treatment and increasing the chance of adverse events when the intra-abdominal tumours concealed by ribs are treated. The aim of this study was to evaluate the influence of partial rib resection on the efficacy and safety of HIFU treatment. Methods: This prospective study was approved by the ethics committee at Chongqing University of Medical Sciences. An informed consent form was obtained from each patient and family member. A total of 16 patients with hepatocellular carcinoma (HCC), consisting of 13 males and 3 females, were studied. All patients had the successful HIFU treatment. To create a better acoustic pathway for HIFU treatment, all of the 16 patients had the ribs that shield the tumour mass to be removed. Magnetic resonance imaging (MRI) was used to evaluate the efficacy of HIFU treatment. Results: Sixteen cases had 23 nodules, including 12 cases with a single nodule, 1 case with 2 nodules, 3 cases with 3 nodules. The mean diameter of tumours was 7.0 ± 2.1 cm (5-10 cm). According to TNM classification, 9 patients were diagnosed as stage II, 4 patients were stage III, and 3 patients were stage IV. Follow-up imaging showed an absence of tumour blood supply and shrinkage of all treated lesions. The survival rates at 1, 2, 3, 4, and 5 years were 100%, 83.3%, 69.4%, 55.6%, and 55.6%, respectively. No serious complications were observed in the patients treated with HIFU. Conclusion: Partial rib resection can create a better acoustic pathway of HIFU therapy. Even though it is an invasive treatment, this measure offers patients an improved prospect of complete tumour ablation when no other treatment is

  7. Uveítes anteriores associadas a doenças sistêmicas Anterior uveitis associated to systemic diseases

    Directory of Open Access Journals (Sweden)

    Maria Angélica Pavão Dimantas

    2003-01-01

    Full Text Available As uveítes anteriores são caracterizadas pela inflamação preponderante do segmento anterior do olho. Hiperemia conjuntival, reação de câmara anterior com células e "flare", precipitados ceráticos e sinéquias posteriores são sinais que compõem o quadro inflamatório. Aspectos clínicos de algumas doenças sistêmicas envolvidas na etiologia das uveítes anteriores serão abordados neste artigo.Anterior uveitis describes a disease predominantly limited to the anterior segment of the eye. Conjunctival hyperemia, anterior chamber cell and flare, keratic precipitates, and iris abnormalities including posterior synechiae characterize the inflammation. This article discusses clinical aspects of the systemic diseases that cause anterior uveitis with review of the literature.

  8. Displaced fracture through the anterior atlantal synchondrosis

    Energy Technology Data Exchange (ETDEWEB)

    Thakar, Chrishan; Allibone, James [Royal National Orthopaedic Hospital NHS Trust, Department of Spinal Deformity, Stanmore, Middlesex (United Kingdom); Harish, Srinivasan [Royal National Orthopaedic Hospital NHS Trust, Department of Radiology, Stanmore, Middlesex (United Kingdom); Saifuddin, Asif [Royal National Orthopaedic Hospital NHS Trust, Department of Radiology, Stanmore, Middlesex (United Kingdom); University College, The Institute of Orthopaedics and Musculoskeletal Sciences, London (United Kingdom)

    2005-09-01

    In the acute setting, accurate radiological interpretation of paediatric cervical spine trauma can be difficult due to a combination of normal variants and presence of multiple synchondroses. We present a rare case of a fracture through the anterior atlantal synchondrosis in a paediatric spine. A five-year-old boy, who fell backwards onto the top of his head while swinging across on a monkey bar frame, presented with neck pain, cervical muscle spasm and decreased right lateral rotation and extension of his neck. Computed tomography showed a displaced diastatic fracture through right anterior atlantal synchondrosis. There are only 12 cases of paediatric C1 fractures reported in the world literature. The importance of considering this diagnosis in the appropriate clinical setting, and the normal variants in the paediatric atlas that can cause diagnostic dilemma to the interpreting radiologist, are discussed in this case report. (orig.)

  9. Prediction of physical and chemical body compositions of purebred and crossbred Nellore cattle using the composition of a rib section.

    Science.gov (United States)

    Marcondes, M I; Tedeschi, L O; Valadares Filho, S C; Chizzotti, M L

    2012-04-01

    The goal of this research was to develop empirical equations to predict chemical and physical compositions of the carcass and the body using the composition of the 9th- to 11th-rib section (rib(9-11)) and other measurements. A database (n = 246) from 6 studies was developed and comprised 37 bulls (BU), 115 steers (STR), and 94 heifers (HF), of which 132 were Nellore (NEL), 76 were NEL × Angus crossbreds (NA), and 38 were NEL × Simmental crossbreds (NS). The right half carcass and the rib(9-11) from the left half carcass were analyzed for ether extract (EE), CP, and water. The remaining components were chemically analyzed to determine the composition of the body. A stepwise procedure was used to determine the variable inclusion in the regression models. The variables included were EE in the rib(9-11) (EER; %), CP in the rib(9-11) (CPR; %), water in the rib(9-11) (WR; %), visceral fat (VF; %; KPH and mesenteric fats), organs plus viscera (OV; %), carcass dressing percentage (CD; %), cold carcass weight (kg), and empty BW (EBW; kg). No sex or breed effects were found on EE and CP compositions of the carcass (C(EE) and C(CP), respectively; %); the equations were as follows: C(EE) = 4.31 + 0.31 × EER + 1.37 × VF [n = 241; R(2) = 0.83; mean square error (MSE) = 4.53] and C(CP) = 17.92 + 0.60 × CPR - 0.17 × CD (n = 238; R(2) = 0.50; MSE = 1.58). Breed affected water content in the carcass (C(W), %); the equations were as follows: C(W) = 48.74 + 0.28 × WR - 0.017 × EBW for NEL; C(W) = 46.69 + 0.32 × WR - 0.017 × EBW for NA; and C(W) = 38.06 + 0.48 × WR - 0.017 × EBW for NS (n = 243; R(2) = 0.67; MSE = 5.17). A sex effect was found on body chemical EE composition (BW(EE)); the equations were as follows: BW(EE) = 2.75 + 0.33 × EER + 1.80 × VF for BU; BW(EE) = 1.84 + 0.33 × EER + 1.91 × VF for STR; and BW(EE) = 4.77 + 0.33 × EER + 1.28 × VF for HF (n = 243; R(2) = 0.89; MSE = 3.88). No sex or breed effects were found on CP composition in the body (BW

  10. Anterior Cruciate Ligament Injuries in Growing Skeleton

    OpenAIRE

    AlHarby, Saleh W.

    2010-01-01

    Anterior cruciate ligament (ACL) injuries in the adult patients are thoroughly studied and published in orthopedic literature. Until recently, little was known about similar injuries in skeletally growing patients. The more frequent involvement of this age group in various athletic activities and the improved diagnostic modalities have increased the awareness and interest of ACL injuries in skeletally immature patients. ACL reconstruction in growing skeleton is controversial and carries some ...

  11. Biomechanics and anterior cruciate ligament reconstruction

    OpenAIRE

    Vercillo Fabio; Dede Ozgur; Wu Changfu; Woo Savio; Noorani Sabrina

    2006-01-01

    Abstract For years, bioengineers and orthopaedic surgeons have applied the principles of mechanics to gain valuable information about the complex function of the anterior cruciate ligament (ACL). The results of these investigations have provided scientific data for surgeons to improve methods of ACL reconstruction and postoperative rehabilitation. This review paper will present specific examples of how the field of biomechanics has impacted the evolution of ACL research. The anatomy and biome...

  12. Current Trends in Anterior Cruciate Ligament Reconstruction

    OpenAIRE

    Kim, Ha Sung; Seon, Jong Keun; Jo, Ah Reum

    2013-01-01

    The advances in the knowledge of anatomy, surgical techniques, and fixation devices have led to the improvement of anterior cruciate ligament (ACL) reconstruction over the past 10 years. Nowadays, double bundle and anatomical single bundle ACL reconstruction that more closely restores the normal anatomy of the ACL are becoming popular. Although there is still no definite conclusion whether double bundle ACL reconstruction provides better clinical results than single bundle reconstruction, the...

  13. Familial predisposition to anterior cruciate ligament injury

    OpenAIRE

    Kenichi Goshima; Katsuhiko Kitaoka; Junsuke Nakase; Hiroyuki Tsuchiya

    2014-01-01

    Although several risk factors for anterior cruciate ligament (ACL) injury have been evaluated in the literature, there are few reports on familial predisposition. This study investigated the familial predisposition to ACL injury. The study included 350 patients who underwent ACL reconstruction between January 2005 and September 2008. All patients were surveyed by telephone or a written questionnaire about family history (FH) of ACL injury, sports played by family members, and mechanisms of in...

  14. Foreign Body Embedded in Anterior Chamber Angle

    OpenAIRE

    Shmuel Graffi; Beatrice Tiosano; Ran Ben Cnaan; Jonathan Bahir; Modi Naftali

    2012-01-01

    Introduction. We present a case of a metallic foreign body embedded in the anterior chamber angle. After standing in close proximity to a construction worker breaking a tile, a 26-year-old woman using soft contact lens for the correction of mild myopia presented to emergency department for evaluation of a foreign body sensation of her right eye. Methods and Results. Diagnosis was confirmed by gonioscopic examination and a noncontrast CT scan of head and orbits. The foreign body was removed by...

  15. Anterior Cruciate Ligament Injuries in Wakeboarding

    OpenAIRE

    Starr, Harlan M.; Sanders, Brett

    2012-01-01

    Background: Wakeboarding is an increasingly popular sport that involves aggressive stunts with high risk for lower extremity injury, including anterior cruciate ligament (ACL) rupture. Little has been reported on prevalence or mechanism of ACL injury while wakeboarding. Hypothesis: The prevalence of ACL injury in wakeboarding approaches that of other high-risk sports. Analyzing the mechanism of ACL injury may aid in future efforts of prevention. Study Design: Descriptive epidemiology study. M...

  16. Risk Factors for Anterior Cruciate Ligament Injury

    OpenAIRE

    Smith, Helen C.; Vacek, Pamela; Johnson, Robert J.; Slauterbeck, James R.; Hashemi, Javad; Shultz, Sandra; Beynnon, Bruce D.

    2012-01-01

    Context: Injuries to the anterior cruciate ligament (ACL) are immediately disabling and are associated with long-term consequences, such as posttraumatic osteoarthritis. It is important to have a comprehensive understanding of all possible risk factors for ACL injury to identify individuals who are at risk for future injuries and to provide an appropriate level of counseling and programs for prevention. Objective: This review, part 2 of a 2-part series, highlights what is known and still unkn...

  17. Erlotinib-related bilateral anterior uveitis

    OpenAIRE

    Ali, Kashif; Kumar, Indu; Usman-Saeed, Muniba; Usman Saeed, Muhammad

    2011-01-01

    The authors report the case of a 68-year-old woman with secondary adenocarcinoma of the lungs from an unknown primary. Erlotinib was started which produced symptoms suggestive of uveitis. Erlotinib was stopped and restarted a month later at a lower dose, which resulted in severe bilateral anterior uveitis. The uveitis settled after stopping erlotinib and treatment with topical steroids and cycloplegics. To the best of the authors’ knowledge, this is the first case of erlotinib-related anterio...

  18. Anterior segment dysgenesis in mosaic Turner syndrome

    OpenAIRE

    Lloyd, I; Haigh, P; Clayton-Smith, J.; Clayton, P.; Price, D.; Ridgway, A; Donnai, D

    1997-01-01

    AIMS/BACKGROUND—Females with Turner syndrome commonly exhibit ophthalmological abnormalities, although there is little information in the literature documenting findings specific to Turner syndrome mosaics. Ophthalmic findings are described in four patients with mosaic Turner syndrome. All had anterior chamber abnormalities and all four had karyotypic abnormalities with a 45, X cell line. The possible relation between the karyotypic and the phenotypic findings in these patients is discussed.
...

  19. Anterior uveitis and its relation to stress

    OpenAIRE

    MULHOLLAND, B; Marks, M; Lightman, S

    2000-01-01

    BACKGROUND/AIMS—Idiopathic recurrent acute anterior uveitis (RAAU) is a common reason for attendance at ophthalmic casualty departments. Patients who suffer with this condition may have multiple recurrent episodes which are often debilitating and necessitate time off work. If recurrences are identified early and treatment initiated rapidly, the inflammation can be minimised and settles quickly on topical treatment with a speedy functional recovery by the patient. It has been our clinical impr...

  20. Bilateral anterior uveitis secondary to erlotinib

    OpenAIRE

    Lim, Lik Thai; Blum, Robert Alexander; Cheng, Chee Peng; Hanifudin, Abdul

    2010-01-01

    Bilateral anterior uveitis secondary to erlotinib phone: +44-784-3617788 (Lim, Lik Thai) (Lim, Lik Thai) Ophthalmology Department, Gartnavel General Hospital - Great Western Road - G12 0YN - Glasgow - UNITED KINGDOM (Lim, Lik Thai) Ophthalmology Department, Gartnavel General Hospital - Great Western Road - G12 0YN - Glasgow - UNITED KINGDOM (Blum, Robert Alexander) Ophthalmology Department, Gartnavel General Hospital - Great Western Road - G12 0YN - G...