WorldWideScience

Sample records for body contouring surgery

  1. Complications following body contouring surgery after massive weight loss

    DEFF Research Database (Denmark)

    Hasanbegovic, Emir; Sørensen, Jens Ahm

    2014-01-01

    Bariatric surgery is a way to achieve lasting weight loss in the obese. Body contouring surgery seeks to alleviate some of the discomfort caused by the excessive loose skin following massive weight loss. Higher complication rates are described in this type of surgery when done post......-bariatric. The purpose of this article is to compare complication rates of body contouring surgery when performed on patients with weight loss due to bariatric surgery compared to patients who lost weight due to dietary changes and/or exercise....

  2. Prevalence and desire for body contouring surgery in postbariatric patients in Saudi Arabia

    Directory of Open Access Journals (Sweden)

    Saleh M Aldaqal

    2012-01-01

    Full Text Available Background: Morbid obesity has become a common problem worldwide and as a result the demand for bariatric surgery has increased as well. Most patients develop skin redundancy and sagging at many body parts after major weight loss procedures which increased the demand for body contouring procedures. Aims : The study was to address the prevalence and patient′s desire for body contouring procedures. Materials and Methods: A cross-sectional study targeting the postbariatric patients from April 2011 to October 2011 was conducted at our hospital. Questionnaire was administered in order to measure frequency and patients desire to undergo body contouring surgery after massive weight loss. Results: The total number of patients was 128 patients. The mean age of our patients was 37-year old (range 18-56 year. The percentage of the desire for body contouring surgery after bariatric surgery was 78.1%. There was very pronounced desire to body contouring surgery after those who underwent gastric bypass surgery with P-value 0.001. Only 18 patients (14% have underwent body contouring surgery, with a total of 29 procedures, in which abdominoplasty considered the most commonly procedure performed (57%. Conclusion : With the increasing number of weight loss surgery, there is higher number of patients that desire a body contouring surgery, which create huge disparity between demand and accessibility.

  3. Post-Bariatric Surgery Satisfaction and Body-Contouring Consideration after Massive Weight Loss

    OpenAIRE

    Saleh M Aldaqal; Ahmad M Makhdoum; Ali M Turki; Awan, Basim A; Osama A Samargandi; Hytham Jamjom

    2013-01-01

    Background: Following a bariatric surgery and massive weight-loss, the outcome is usually sullied by consequences on the body′s contour and redundant skin. Aims: We aimed to record the frequency of contour irregularities and quantify patients′ satisfaction with appearance and anticipations from body contouring surgery. Materials and Methods: The ethical committee at King Abdulaziz University Hospital approved the study, and patients were consented. A cross-sectional study targeting the post-b...

  4. Body Contouring After Major Weight Loss

    Science.gov (United States)

    ... Blog Plastic Surgery Statistics ASPS TV News Program History of Plastic Surgery For Medical Professionals ... Major Weight Loss Body Contouring After Major Weight Loss For Men and Women Body contouring following major weight loss improves the ...

  5. Body image and quality of life in patients with and without body contouring surgery following bariatric surgery: a comparison of pre- and post-surgery groups

    Science.gov (United States)

    de Zwaan, Martina; Georgiadou, Ekaterini; Stroh, Christine E.; Teufel, Martin; Köhler, Hinrich; Tengler, Maxi; Müller, Astrid

    2014-01-01

    Background: Massive weight loss (MWL) following bariatric surgery frequently results in an excess of overstretched skin causing physical discomfort and negatively affecting quality of life, self-esteem, body image, and physical functioning. Methods: In this cross-sectional study 3 groups were compared: (1) patients prior to bariatric surgery (n = 79), (2) patients after bariatric surgery who had not undergone body contouring surgery (BCS) (n = 252), and (3) patients after bariatric surgery who underwent subsequent BCS (n = 62). All participants completed self-report questionnaires assessing body image (Multidimensional Body-Self Relations Questionnaire, MBSRQ), quality of life (IWQOL-Lite), symptoms of depression (PHQ-9), and anxiety (GAD-7). Results: Overall, 62 patients (19.2%) reported having undergone a total of 90 BCS procedures. The most common were abdominoplasties (88.7%), thigh lifts (24.2%), and breast lifts (16.1%). Post-bariatric surgery patients differed significantly in most variables from pre-bariatric surgery patients. Although there were fewer differences between patients with and without BCS, patients after BCS reported better appearance evaluation (AE), body area satisfaction (BAS), and physical functioning, even after controlling for excess weight loss and time since surgery. No differences were found for symptoms of depression and anxiety, and most other quality of life and body image domains. Discussion: Our results support the results of longitudinal studies demonstrating significant improvements in different aspects of body image, quality of life, and general psychopathology after bariatric surgery. Also, we found better AE and physical functioning in patients after BCS following bariatric surgery compared to patients with MWL after bariatric surgery who did not undergo BCS. Overall, there appears to be an effect of BCS on certain aspects of body image and quality of life but not on psychological aspects on the whole. PMID:25477839

  6. Body image and quality of life in patients with and without body contouring surgery following bariatric surgery: a comparison of pre- and post-surgery groups

    Directory of Open Access Journals (Sweden)

    Martina eDe Zwaan

    2014-11-01

    Full Text Available Background: Massive weight loss (MWL following bariatric surgery frequently results in an excess of overstretched skin causing physical discomfort and negatively affecting quality of life, self-esteem, body image and physical functioning.Methods: In this cross-sectional study 3 groups were compared: 1 patients prior to bariatric surgery (n=79, 2 patients after bariatric surgery who had not undergone BCS (n=252, and 3 patients after bariatric surgery who underwent subsequent body contouring surgery (BCS (n=62. All participants completed self-report questionnaires assessing body image (MBSRQ, quality of life (IWQOL-Lite, symptoms of depression (PHQ-9 and anxiety (GAD-7.Results: Overall, 62 patients (19.2% reported having undergone a total of 90 BCS procedures. The most common were abdominoplasties (88.7%, thigh lifts (24.2%, and breast lifts (16.1%. Post-bariatric surgery patients differed significantly in most variables from pre-bariatric surgery patients; however, there were fewer differences between patients with and without BCS. Patients after BCS reported better appearance evaluation, body area satisfaction, and physical functioning, even after controlling for excess weight loss and time since surgery. No differences were found for symptoms of depression and anxiety, and most other quality of life and body image domains. Discussion: Our results support the results of longitudinal studies demonstrating significant improvements in different aspects of body image, quality of life, and general psychopathology after bariatric surgery. Also, we found better appearance evaluation and physical functioning in patients after BCS following bariatric surgery compared to patients with MWL after bariatric surgery who did not undergo BCS. Overall, there appears to be an effect of BCS on certain aspects of body image and quality of life but not on psychological aspects on the whole.

  7. Funding for Postbariatric Body-Contouring (Bariplastic Surgery in England: A Postcode Lottery

    Directory of Open Access Journals (Sweden)

    Samrat Mukherjee

    2014-01-01

    Full Text Available Background. With the increase in bariatric surgery in the UK, there has been a substantial increase in patients undergoing massive weight loss (MWL seeking postbariatric body-contouring (bariplastic surgery. However, there is a wide variation of availability on the National Health Service (NHS. Aims. To (1 review the funding policies of Primary Care Trusts (PCTs in England for bariplastic surgery and (2 analyse the number of procedures funded in two consecutive financial years. Methods. We sent out questionnaires to all PCTs in England regarding their funding policies for bariplastic surgery and requested the number of procedures funded in 2008-09 and 2009-10. Findings. 121/147 (82% PCTs replied to our questionnaires. 73 (60% excluded all bariplastic procedures. 106/121 (87.6% PCTs had referral guidelines for plastic surgery. 46/121 (38% PCTs provided the total number of funded abdominoplasty-apronectomy (A-A in the two financial years: total number of A-A applicants rose from 393 to 531, but approval for funding fell from 24.2% to 19.6%. Only 3 (2% PCTs indicated increase in their future spending on bariplastic procedures in the next 5 years, with 67% planning to decrease or unsure about future funding. Conclusion. There exists a postcode lottery for bariplastic surgery in England and we feel the need for guidelines on provision of bariplastic procedures following MWL.

  8. Funding for postbariatric body-contouring (bariplastic) surgery in England: a postcode lottery.

    Science.gov (United States)

    Mukherjee, Samrat; Kamat, Sachin; Adegbola, Samuel; Agrawal, Sanjay

    2014-01-01

    Background. With the increase in bariatric surgery in the UK, there has been a substantial increase in patients undergoing massive weight loss (MWL) seeking postbariatric body-contouring (bariplastic) surgery. However, there is a wide variation of availability on the National Health Service (NHS). Aims. To (1) review the funding policies of Primary Care Trusts (PCTs) in England for bariplastic surgery and (2) analyse the number of procedures funded in two consecutive financial years. Methods. We sent out questionnaires to all PCTs in England regarding their funding policies for bariplastic surgery and requested the number of procedures funded in 2008-09 and 2009-10. Findings. 121/147 (82%) PCTs replied to our questionnaires. 73 (60%) excluded all bariplastic procedures. 106/121 (87.6%) PCTs had referral guidelines for plastic surgery. 46/121 (38%) PCTs provided the total number of funded abdominoplasty-apronectomy (A-A) in the two financial years: total number of A-A applicants rose from 393 to 531, but approval for funding fell from 24.2% to 19.6%. Only 3 (2%) PCTs indicated increase in their future spending on bariplastic procedures in the next 5 years, with 67% planning to decrease or unsure about future funding. Conclusion. There exists a postcode lottery for bariplastic surgery in England and we feel the need for guidelines on provision of bariplastic procedures following MWL.

  9. Changing Body Image and Well-Being: Following the Experience of Massive Weight Loss and Body Contouring Surgery

    Directory of Open Access Journals (Sweden)

    Jo Gilmartin

    2014-03-01

    Full Text Available This paper reports on the perception of changing body image and well-being for patients who had undergone plastic surgery following massive weight loss. The exploratory, qualitative study was undertaken with 20 patients from one teaching hospital in the south of England. Semi-structured interviews were carried out and a thematic analysis of the data undertaken. The results provide important insights regarding body contouring influencing body image change and the adjustment process involved. The ability to pursue self-esteem and the accruing social benefits is emphasized in the interrelated sub themes including social acceptance, undoing depression and sexual vitality. Body contouring surgery following massive weight loss appears to facilitate improvement in body image and well-being. Adjustment to the changing body image is both empowering and challenging. Supportive educational programmes need to be developed to assist this transition to a more positive body image and appreciation; these could usefully include access to and involvement with patient support groups.

  10. Changing Body Image and Well-Being: Following the Experience of Massive Weight Loss and Body Contouring Surgery

    Science.gov (United States)

    Gilmartin, Jo; Long, Andrew F.; Soldin, Mark

    2014-01-01

    This paper reports on the perception of changing body image and well-being for patients who had undergone plastic surgery following massive weight loss. The exploratory, qualitative study was undertaken with 20 patients from one teaching hospital in the south of England. Semi-structured interviews were carried out and a thematic analysis of the data undertaken. The results provide important insights regarding body contouring influencing body image change and the adjustment process involved. The ability to pursue self-esteem and the accruing social benefits is emphasized in the interrelated sub themes including social acceptance, undoing depression and sexual vitality. Body contouring surgery following massive weight loss appears to facilitate improvement in body image and well-being. Adjustment to the changing body image is both empowering and challenging. Supportive educational programmes need to be developed to assist this transition to a more positive body image and appreciation; these could usefully include access to and involvement with patient support groups. PMID:27429267

  11. Body Image and Body Contouring Procedures.

    Science.gov (United States)

    Sarwer, David B; Polonsky, Heather M

    2016-10-01

    Dissatisfaction with physical appearance and body image is a common psychological phenomena in Western society. Body image dissatisfaction is frequently reported by those who have excess body weight, but also is seen in those of normal body weight. For both groups of individuals, this dissatisfaction impacts self-esteem and quality of life. Furthermore, it is believed to be the motivational catalyst to a range of appearance-enhancing behaviors, including weight loss efforts and physical activity. Body image dissatisfaction is also believed to play a role in the decision to seek the wide range of body contouring procedures offered by aesthetic physicians. Individuals who seek these procedures typically report increased body image dissatisfaction, focus on the feature they wish to alter with treatment, and often experience improvement in body image following treatment. At the same time, extreme body image dissatisfaction is a symptom of a number of recognized psychiatric disorders. These include anorexia nervosa, bulimia nervosa, and body dysmorphic disorder (BDD), all of which can contraindicate aesthetic treatment. This special topic review paper provides an overview of the relationship between body image dissatisfaction and aesthetic procedures designed to improve body contouring. The review specifically focuses on the relationship of body image and body weight, as well as the presentation of body image psychopathology that would contraindicate aesthetic surgery. The overall goal of the paper is to highlight the clinical implications of the existing research and provide suggestions for future research on the psychological aspects of body contouring procedures. PMID:27634782

  12. Body Image and Body Contouring Procedures.

    Science.gov (United States)

    Sarwer, David B; Polonsky, Heather M

    2016-10-01

    Dissatisfaction with physical appearance and body image is a common psychological phenomena in Western society. Body image dissatisfaction is frequently reported by those who have excess body weight, but also is seen in those of normal body weight. For both groups of individuals, this dissatisfaction impacts self-esteem and quality of life. Furthermore, it is believed to be the motivational catalyst to a range of appearance-enhancing behaviors, including weight loss efforts and physical activity. Body image dissatisfaction is also believed to play a role in the decision to seek the wide range of body contouring procedures offered by aesthetic physicians. Individuals who seek these procedures typically report increased body image dissatisfaction, focus on the feature they wish to alter with treatment, and often experience improvement in body image following treatment. At the same time, extreme body image dissatisfaction is a symptom of a number of recognized psychiatric disorders. These include anorexia nervosa, bulimia nervosa, and body dysmorphic disorder (BDD), all of which can contraindicate aesthetic treatment. This special topic review paper provides an overview of the relationship between body image dissatisfaction and aesthetic procedures designed to improve body contouring. The review specifically focuses on the relationship of body image and body weight, as well as the presentation of body image psychopathology that would contraindicate aesthetic surgery. The overall goal of the paper is to highlight the clinical implications of the existing research and provide suggestions for future research on the psychological aspects of body contouring procedures.

  13. Assessing Improvement in Quality of Life and Patient Satisfaction following Body Contouring Surgery in Patients with Massive Weight Loss: A Critical Review of Outcome Measures Employed

    Directory of Open Access Journals (Sweden)

    Shehab Jabir

    2013-01-01

    Full Text Available Body contouring following massive weight loss is a rapidly expanding field in plastic surgery. However, healthcare payers are reluctant to fund such procedures, viewing them as purely cosmetic. This has resulted in a flurry of studies assessing quality of life (QoL and patient satisfaction following body contouring surgery in this cohort of patients to establish an evidence base to support the idea that body contouring is as much (or even more a functional procedure as it is cosmetic. However, the methods employed in these studies are seldom ideal, and hence the conclusions are unreliable. The gold standard to assess QoL and patient satisfaction is to use patient specific psychometrically validated patient reported outcome (PRO measures. Developing such measures consists of a three-step process which includes a review of the current literature, qualitative patient interviews to determine what patients consider the most important, and expert opinion. This study aims to appraise the currently available literature on assessment of QoL and patient satisfaction in body contouring surgery patients. This will hopefully provide an understanding of methodological weaknesses in current studies and inform future investigators of the design of ideal instruments for assessing QoL and patient satisfaction in body contouring patients.

  14. Two Cases of Lower Body Contouring with

    Directory of Open Access Journals (Sweden)

    Hyun Ho Han

    2012-01-01

    Full Text Available Massive weight loss results in skin excess, leading to an unsatisfying body contour. Variousthigh lift procedures can correct flabby skin in the lower leg. We present a lower bodycontouring technique with a report on two patients. The procedure is determined by the bodycontour of the patient. As the skin excess in the thigh area tended to appear mostly on themedial side, a vertical medial thigh lift was considered. Moreover, for patients with a pear/guitar-shaped body contour, we added the spiral thigh lift for skin excess in the buttocks andthe lateral thigh area. The extent of tissue to excise was determined by pinching the patientin a standing position. The inferior skin flap was fixed to non-movable tissue, which was helpfulfor lifting the tissue and preventing the widening of the scar. After the operation, a drain waskept for 3 to 4 days. A compressive garment was used after removing the drain. There wereno complications. The patients were discharged 6 to 8 days after the operation. In conclusion,skin excess, especially in the lower body, can be corrected by a thigh lift combining severalprocedures, varying from person to person.

  15. Body dysmorphia and plastic surgery.

    Science.gov (United States)

    Kyle, Allison

    2012-01-01

    Body dysmorphic disorder is a mental disorder characterized by a preoccupation with some aspect of one's appearance. In cosmetic surgery, this preoccupation can be overlooked by practitioners resulting in a discrepancy between expected and realistic outcome. Identifying the characteristics of this disorder may be crucial to the practitioner-patient relationship in the plastic surgery setting. PMID:22929194

  16. Cirurgia do contorno corporal no paciente após perda ponderal maciça: experiência de três anos em hospital público secundário Body contour surgery in the massive weight loss patient: three year-experience in a secondary public hospital

    Directory of Open Access Journals (Sweden)

    Simone Cristina Orpheu

    2009-01-01

    Full Text Available OBJETIVO: Apresentar a experiência clínico-cirúrgica de três anos relacionada às cirurgias de contorno corporal no paciente após perda ponderal maciça, realizadas pela equipe de Cirurgia Plástica do Hospital Estadual de Sapopemba. MÉTODOS: Estudo retrospectivo realizado no Hospital Estadual de Sapopemba, vinculado ao Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, no período de julho de 2005 a julho de 2008. Foram operados 98 pacientes submetidos a tratamento de obesidade mórbida por meio de gastroplastia redutora, com sucesso para a técnica, ou emagrecimento por método não-cirúrgico. Os critérios de exclusão foram tabagismo, intenção gestacional e instabilidade ponderal, exigindo-se peso estável por pelo menos seis meses após atingido a perda ponderal satisfatória. RESULTADOS: Dos 98 pacientes operados, 97% eram do sexo feminino, com idade média de 40,5 anos e o método de emagrecimento foi cirúrgico em 88% deles. Das 177 cirurgias plásticas realizadas, 46% foram abdominoplastias, seguidas por mastoplastias (15%, suspensões de coxa (13% e braquioplastias (12%. O período médio de internação foi dois dias e as principais complicações diagnosticadas foram: seroma (28%, necroses/deiscências de pequeno porte (18%, necroses/ deiscências de grande porte (4%, hematomas (4%, tromboflebite superficial de veia safena (2% e trombose venosa profunda (1%. CONCLUSÃO: O desejo de cirurgias para melhora do contorno corporal após perda ponderal maciça constitui demanda crescente. Cabe ao cirurgião plástico conhecer as peculiaridades clínicas e os riscos maiores de complicações desses pacientes, ponderar suas expectativas, analisar os resultados e manter a busca constante pelo aperfeiçoamento das técnicas cirúrgicas.OBJECTIVE: To present the clinical-surgical three year-experience related to body contour surgery in the massive weight loss patient, performed by the Plastic Surgery team of

  17. An anthropometric classification of body contour deformities after massive weight loss.

    Science.gov (United States)

    Iglesias, Martin; Butron, Patricia; Abarca, Leonardo; Perez-Monzo, Mario F; de Rienzo-Madero, Beatriz

    2010-08-01

    Deformities caused by massive weight loss were originally subsidized at the Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán." This caused great economical losses, which led to the development of a classification to select patients with functional problems secondary to massive weight loss. The parameter used is the size of the pannus in relation to fixed anatomic structures within the following anatomic regions: abdomen, arms, thighs, mammary glands, lateral thoracic area, back, lumbar region, gluteal region, sacrum, and mons pubis. Grade 3 deformities are candidates for body contouring surgery because they constitute a functional problem. Grade 2 deformities reevaluated whether the patient has comorbidities. Lesser grades are considered aesthetic procedures and are not candidates for surgical rehabilitation at the Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán." This classification allowed an improvement in communication between the different surgical-medical specialties; therefore, we suggest its application not only for surgical-administrative reasons but also for academic purposes.

  18. Does ultrasound provide any added value in breast contouring for radiotherapy after conserving surgery for cancer?

    International Nuclear Information System (INIS)

    Whole breast irradiation after conserving surgery for breast cancer requires precise definition of the target volume. The standard approach uses computed tomography (CT) images. However, since fatty breast and non-breast tissues have similar electronic densities, difficulties in differentiating between them hamper breast volume delineation. To overcome this limitation the breast contour is defined by palpation and then radio-opaque wire is put around it before the CT scan. To optimize assessment of breast margins in the cranial, caudal, medial, lateral and posterior directions, the present study evaluated palpation and CT and determined whether ultrasound (US) provided any added value. Twenty consecutive patients were enrolled after they had provided informed consent to participating in this prospective study which was approved by the Regional Public Health Ethics Committee. Palpation and US defined breast margins and each contour was marked and outlined with a fine plastic wire. Breasts were then contoured on axial CT images using the breast window width (WW) and window level (WL) (401 and 750 Hounsfield Units –HU- respectively), at which setting the plastic wires were invisible. Then, the lung window function (WW 1601 HU; WL −300 HU) was inserted to visualize the plastic wires which were used as guidelines to contour the palpable and US breast volumes. As each wire had a different diameter, both volumes were easily defined on CT slices. Results were analyzed using descriptive statistics, percentage overlap and reproducibility measures (agreement and reliability). Volumes: US gave the largest and palpation the smallest. Agreement was best between palpation and CT. Reliability was almost perfect in all correlations. Extensions: Cranial and posterior were highest with US and smallest with palpation. Agreement was best between palpation and CT in all extensions except the cranial. Since strong to almost perfect agreement emerged for all comparisons, reliability

  19. Efficacy of injections of phosphatidylcholine into fat deposits-a non-surgical alternative to liposuction in body-contouring

    Directory of Open Access Journals (Sweden)

    Karl-G Heinrich

    2005-01-01

    Full Text Available Injecting phosphatidylcholine has been used in South America as a non-surgical treatment in body contouring. The objective of this study was to demonstrate the efficacy of injecting phosphatidylcholine in the reduction of localised fat deposits. 86 patients were included in the study. Patients received 1-3 treatments in localised fat deposits in various areas of the body using phosphatidylcholine. After treatment with phosphatidylcholine (250 mg / 5 ml, fat deposits show an average circumferential reduction per application of 2.70 cm. No patient showed irregularities, dimples or any serious side effect after treatment. Results remained stable during the time of follow up. All patients showed remarkable reductions of the fat deposits treated with phosphatidylcholine. Using the correct technique, injecting phosphatidylcholine may be a safe and efficacious alternative to liposuction in patients objecting to surgery.

  20. Elevation Contour Analysis and Water body Extraction for Finding Water Scarcity Locations using DEM

    OpenAIRE

    Kodge, B. G.; P.S Hiremath

    2014-01-01

    The presents study was aimed to create new methods for extraction and analysis of land elevation contour lines, automatic extraction of water bodies (river basins and lakes), from the digital elevation models (DEM) of a test area. And extraction of villages which are fell under critical water scarcity regions for agriculture and drinking water with respect to their elevation data and available natural water resources.

  1. Automatic delineation of body contours on cone-beam CT images using a delineation booster

    Science.gov (United States)

    Stippel, G.; van Rooijen, D. C.; Crezee, J.; Bel, A.

    2012-07-01

    In radiotherapy, cone-beam computerized tomography (CBCT) scans are used for position correction for various tumour sites. At the start of the treatment, a CT scan that serves as input for a treatment planning is acquired. A CBCT scan is made prior to the irradiation of the tumour. Because there might be significant interfractional tumour movement, online recalculation of the dose improves decision making on how to proceed. A prerequisite for such recalculation is an accurately delineated body contour. In this note, we present an automatic delineation method for the body contour in the unprocessed CBCT scans, that employs a novel delineation boosting technique. The main idea of this technique is to construct an accurate delineation by combining the strength of several edge detectors in an innovative way. Quantitative validation reveals that the algorithm performs comparably with the manual delineations of two trained observers. Furthermore, because of the generic nature of the delineation boosting procedure, the algorithm can easily be extended with additional edge detectors to further increase the accuracy. Finally, the processing time of one scan when delineated manually is 3 h, and the total processing time is 24 min for one scan if the algorithm is used in its present form. Current investigation includes the conversion of the Matlab algorithm to C++ and the development of a visual tool to quickly detect which automatically delineated slices need manual correction. From this we expect further speeding up of the process, allowing online computation.

  2. Selective radiofrequency therapy as a non-invasive approach for contactless body contouring and circumferential reduction.

    Science.gov (United States)

    Fajkošová, Kateřina; Machovcová, Alena; Onder, Meltem; Fritz, Klaus

    2014-03-01

    In this study, the efficacy of non-contact, selective radiofrequency (RF) were evaluated for body contouring as non-invasive fat and circumferential reduction of the abdomen. 40 healthy (36 female, 4 male) subjects showing significant volume of subcutaneous fat tissue on the abdomen and waistline were included. Once a week for 30 minutes, 4 sessions were performed. The applicator was placed on a supplied spacer covering the treatment area. Maximum power was 200W, which induced heat in the fat and connective tissue layer. The homogeneity of heat distribution and temperature of the skin surface were controlled. The circumferential reduction was measured at the baseline and after the last treatment. The photographs and adverse effects were recorded. Participants completed the self-evaluation questionnaires and rated their level of satisfaction. All subjects tolerated the treatments well. The only side effect was mild to moderate erythema. 35 subjects finished the protocol as planned and 5 subjects dropped off due to events not related to the study. 32 subjects had a 1-13 cm decrease in abdominal circumference and 3 subjects did not show significant response (0-1 cm). Most likely, a very thin fat layer was the reason for lack of response (the non-responding group was the thinnest patient group). No significant differences were found between men and women. The average decrease of 4.93 cm was calculated as a result of circumferential reduction statistical evidence. This study demonstrates that the selective RF system designed for contactless deep tissue heating is a painless, safe, and effective treatment for non-surgical body contouring and circumferential fat reduction.

  3. Effects of Multilevel Facetectomy and Screw Density on Postoperative Changes in Spinal Rod Contour in Thoracic Adolescent Idiopathic Scoliosis Surgery.

    Science.gov (United States)

    Kokabu, Terufumi; Sudo, Hideki; Abe, Yuichiro; Ito, Manabu; Ito, Yoichi M; Iwasaki, Norimasa

    2016-01-01

    Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively. The concave and convex rod shapes from patients with thoracic AIS (n = 49) were traced prior to insertion. Postoperative sagittal rod shape was determined by computed tomography. The angle of intersection of the tangents to the rod end points was measured. Multiple stepwise linear regression analysis was used to identify variables independently predictive of change in rod contour (Δθ). Average Δθ at the concave and convex side were 13.6° ± 7.5° and 4.3° ± 4.8°, respectively. The Δθ at the concave side was significantly greater than that of the convex side (P < 0.0001) and significantly correlated with Risser sign (P = 0.032), the preoperative main thoracic Cobb angle (P = 0.031), the preoperative TK angle (P = 0.012), and the number of facetectomy levels (P = 0.007). Furthermore, a Δθ at the concave side ≥14° significantly correlated with the postoperative TK angle (P = 0.003), the number of facetectomy levels (P = 0.021), and screw density at the concave side (P = 0.008). Rod deformation at the concave side suggests that corrective forces acting on that side are greater than on the convex side. Multilevel facetectomy and/or screw density at the concave side have positive effects on reducing the rod deformation that can lead to a loss of TK angle postoperatively. PMID:27564683

  4. Effects of Multilevel Facetectomy and Screw Density on Postoperative Changes in Spinal Rod Contour in Thoracic Adolescent Idiopathic Scoliosis Surgery

    Science.gov (United States)

    Kokabu, Terufumi; Sudo, Hideki; Abe, Yuichiro; Ito, Manabu; Ito, Yoichi M.; Iwasaki, Norimasa

    2016-01-01

    Flattening of the preimplantation rod contour in the sagittal plane influences thoracic kyphosis (TK) restoration in adolescent idiopathic scoliosis (AIS) surgery. The effects of multilevel facetectomy and screw density on postoperative changes in spinal rod contour have not been documented. This study aimed to evaluate the effects of multilevel facetectomy and screw density on changes in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with AIS prospectively. The concave and convex rod shapes from patients with thoracic AIS (n = 49) were traced prior to insertion. Postoperative sagittal rod shape was determined by computed tomography. The angle of intersection of the tangents to the rod end points was measured. Multiple stepwise linear regression analysis was used to identify variables independently predictive of change in rod contour (Δθ). Average Δθ at the concave and convex side were 13.6° ± 7.5° and 4.3° ± 4.8°, respectively. The Δθ at the concave side was significantly greater than that of the convex side (P < 0.0001) and significantly correlated with Risser sign (P = 0.032), the preoperative main thoracic Cobb angle (P = 0.031), the preoperative TK angle (P = 0.012), and the number of facetectomy levels (P = 0.007). Furthermore, a Δθ at the concave side ≥14° significantly correlated with the postoperative TK angle (P = 0.003), the number of facetectomy levels (P = 0.021), and screw density at the concave side (P = 0.008). Rod deformation at the concave side suggests that corrective forces acting on that side are greater than on the convex side. Multilevel facetectomy and/or screw density at the concave side have positive effects on reducing the rod deformation that can lead to a loss of TK angle postoperatively. PMID:27564683

  5. Young adult women's experiences of body image after bariatric surgery

    DEFF Research Database (Denmark)

    Froulund Jensen, Janet; Petersen, Mette H; Larsen, Tine B;

    2014-01-01

    AIM: To understand the lived experience of body image in young women after obesity surgery. BACKGROUND: Quantitative studies have documented that health-related quality of life and body image are improved after bariatric surgery, probably due to significant weight loss. Female obesity surgery...... candidates are likely to be motivated by dissatisfaction regarding physical appearance. However, little is known about the experience of the individual woman, leaving little understanding of the association between bariatric surgery and changes in health-related quality of life and body image. DESIGN...... synthesized into one major theme: on the edge of control, that is describing these women's feelings of being on the edge of balance between control and loss of control. CONCLUSION: Perception of control may be an essential aspect of body image and the key to understanding these young women's feelings...

  6. Complications of Lower Body Lift Surgery in Postbariatric Patients

    Science.gov (United States)

    van Dijk, Martine M.; Klein, Steven; Hoogbergen, Maarten M.

    2016-01-01

    Background: There is an exponential rise of patients with massive weight loss because of bariatric surgery or lifestyle changes. The result is an increase of patients with folds of redundant skin that may cause physical and psychological problems. The lower body lift is a procedure to correct deformities in the abdomen, mons, flanks, lateral thighs, and buttocks. Complication rates are quite high and could negatively affect the positive outcomes. The purpose of this study is to assess complication rates and to identify predictors of complications to optimize outcomes for patients after lower body lift surgery. Methods: A retrospective analysis of 100 patients who underwent a lower body lift procedure was performed. The patients were reviewed for complications, demographic data, comorbidities, smoking, highest lifetime body mass index, body mass index before lower body lift surgery, percentage of excess weight loss, and amount of tissue excised. Results: The overall complication rate was 78%. Twenty-two percent of the patients had major complications and 56% had minor complications. There is a linear relationship between body mass index before lower body lift surgery and complications (P = 0.03). The percentage of excess weight loss (odds ratio [OR] 0.97; 95% confidence interval [CI] 0.92–1.00), highest lifetime body mass index (OR 1.08; 95% CI 1.01–1.15), body mass index before lower body lift surgery (OR 1.17; 95% CI 1.02–1.33), and smoking (OR 7.74; CI 0.98–61.16) are significantly associated with the development of complications. Conclusions: This study emphasizes the importance of a good weight status before surgery and cessation of smoking to minimize the risk of complications.

  7. Addiction to Cosmetic Surgery: Representations and Medicalization of the Body

    Science.gov (United States)

    Suissa, Amnon Jacob

    2008-01-01

    Contemporary social transformations of the body are essentially mediated by medical discourse. With the body conceived of as "soft and modifiable," we are witnessing an unprecedented rise in recourse to medicine in order to validate primarily social conditions. In this context, plastic surgery functions as a modality of social control and…

  8. Nontangent, Developed Contour Bulkheads for a Wing-Body Single Stage Launch Vehicle

    Science.gov (United States)

    Wu, K. Chauncey; Lepsch, Roger A., Jr.

    1999-01-01

    Dry weights for a SSTO vehicle which incorporates nontangent, developed contour bulkheads are estimated and compared to a baseline vehicle with 1.41 4 aspect ratio ellipsoidal bulkheads, Weights, volumes and heights of optimized bulkhead designs are computed using a preliminary design bulkhead analysis code. The dry weight of a vehicle which incorporates the optimized bulkheads is predicted using a vehicle weights and sizing code. Two optimization approaches are employed. A structural-level method, where the vehicle s three major bulkhead regions are optimized separately and then incorporated into a model for computation of the vehicle dry weight, predicts a reduction of 4365 Ib (2.2 percent) from the 200,679 Ib baseline vehicle dry weight. In the second, vehicle-level, approach, the vehicle dry weight is the objective function for the optimization. During the vehicle- level analysis, modified bulkhead designs are first analyzed, then incorporated into the weights model for computation of a dry weight. The optimizer simultaneously manipulates design variables for all three bulkheads to reduce the dry weight. The vehicle-level analysis predicts a dry weight reduction of 5129 Ib, a 2.6 percent reduction from the baseline value. These results suggest that nontangent, developed contour bulkheads may provide substantial weight savings for SSTO vehicles.

  9. [Body dysmorphic disorder and aesthetic surgery: A systematic review].

    Science.gov (United States)

    Kerfant, N; Henry, A-S; Ta, P; Trimaille, A; Philandrianos, C; Hu, W

    2015-12-01

    Patients suffering from body dysmorphic disorder (BDD) are preoccupied with an imagined or minor defect in appearance that causes significant distress and impairment in social and occupational functioning. Despite a rate of up to 15% of BDD patients reported in cosmetic surgery settings, there is no consensus on the best management for these patients. The main purpose of this article was to conduct a literature review on BDD and cosmetic surgery. Properly trained healthcare professionals in recognizing and diagnosing this pathology is essential for the delivery of quality psychiatric care while taking into account the high prevalence of body dysmorphic disorder patients in cosmetic surgery and the poor outcome of these patients following cosmetic procedures. PMID:26184610

  10. A Rarely Seen Complication After Strabismus Surgery: Forgotten Foreign Body

    Directory of Open Access Journals (Sweden)

    Umut Karaca

    2014-01-01

    Full Text Available A 21-year-old male patient operated for esotropia 10 months ago presented to our clinic with the complaint of swelling and stinging on the right upper eyelid. Physical examination revealed a yellowish foreign body (cellulose sponge at the lateral fornix, which induced localized papillary reaction on eyelid conjunctiva and vascularization on bulbar conjunctiva. The foreign body was removed and medical treatment was initiated. Foreign body surrounded with giant cells was reported on histopathologic examination. Although cellulose sponge is not routinely used in strabismus surgery, it may be used especially in some hemorrhagic cases. It is important to control the field and to remove all materials from the eye at the end of the surgery. (Turk J Ophthalmol 2014; 44: 78-9

  11. Patient Selection in Plastic Surgery: Recognizing Body Dysmorphic Disorder

    Directory of Open Access Journals (Sweden)

    Cihan Sahin

    2013-04-01

    Full Text Available Plastic surgery is a branch of medicine that provides significant improvements to the people with positive changes. But first of all, this branch has a characteristic which requires analysing patients' psychological situation very carefully. Plastic surgeons are often confronted by patients with mental disorders seeking aesthetic surgery. It is imperative for surgeons to recognize possible underlying psychiatric illnesses. Common psychiatric conditions seen in cosmetic surgery patients include body dysmorphic disorder (BDD, narcissistic personality disorder and histrionic personality disorders. BDD is of particular importance to plastic surgeons. Because outrageous dissatisfaction with one's appearance may conceal psychopathologic traits that are not always easily recognizable, and which, if neglected, may result in serious iatrogenic and medicolegal consequences, we hope that this paper will help plastic surgeons in ultimately preventing patient and surgeon dissatisfaction within the population of patients with psychiatric disorders, and should recognize the diagnostic features of body dysmorphic disorder and screen psychologically unstable patients who may never be satisfied with surgery. [Arch Clin Exp Surg 2013; 2(2.000: 109-115

  12. The impact of cosmetic surgery media portrayals on body image and attitudes

    OpenAIRE

    Ashikali, Eleni-Marina

    2014-01-01

    The cosmetic surgery industry has rapidly expanded and Professional Associations for surgery in the UK and USA have expressed concern over the ways in which surgery is portrayed in the media. This thesis aimed to investigate how different portrayals of cosmetic surgery in the media impact women and adolescent girls’ body image and attitudes towards surgery. Moreover, it examined a number of moderating variables which may affect responses to such media. The first three studies examined the ...

  13. The body as metaphor: digestive bodies and political surgery in Shakespeare's Macbeth.

    Science.gov (United States)

    Spicci, M

    2007-12-01

    The article aims to reconstruct the perspective of bodily pathology underpinning Shakespeare's Macbeth. In the play, Scotland's body politic is frequently depicted as a macro-system suffering from a complexional imbalance of digestive origins. More specifically, Scotland comes over as a huge stomach strangled by a carcinogenic foreign body in need of being "raze[d] out". Since traditional purgative drugs such as "rhubarb" and "cynne" turn out to be totally inefficient to cure the body of Scotland, the resolution to adopt a drastic medical measure becomes more than urgent. The conclusion of the play coincides with the most terrible form of political surgery: Shakespeare's reiterated use of verbs such as "pluck" and "purge", commonly used in Renaissance herbals and handbooks, suggests that Macbeth's physical body is suffering from a kind of "blockage", for which herbal treatments are no longer sufficient. Nothing less than a surgical operation is needed to "purge" the corrupt entrails of the State dominated by Macbeth's tyranny.

  14. Acceptance of cosmetic surgery, body appreciation, body ideal internalization, and fashion blog reading among late adolescents in Sweden.

    Science.gov (United States)

    Lunde, Carolina

    2013-09-01

    This study examined adolescents' attitudes of cosmetic surgery, as well as the relationships between these attitudes, body appreciation, body ideal internalization, and fashion blog reading. The sample comprised 110 (60 boys, 50 girls) late adolescents (mean age 16.9 years) from a Swedish high school. The results indicated that younger adolescents seem somewhat more accepting of cosmetic surgery. This was especially the case for boys' acceptance of social motives for obtaining cosmetic surgery (boys' M=2.3±1.55 vs. girls' M=1.7±0.89). Girls', and to a limited extent boys', internalization of the thin ideal was related to more favorable cosmetic surgery attitudes. Athletic ideal internalization and body appreciation were unrelated to these attitudes. Finally, girls who frequently read fashion blogs reported higher thin ideal internalization, and also demonstrated a slight tendency of more cosmetic surgery consideration.

  15. Transnational Body Projects: Media Representations of Cosmetic Surgery Tourism in Argentina and the United States

    OpenAIRE

    Erynn Masi de Casanova; Barbara Sutton

    2015-01-01

    Cosmetic surgery tourism (CST) is part of the growing trend known as medical tourism. As people in the global North travel to less affluent countries to modify their bodies through cosmetic surgery, their transnational body projects are influenced by both economic "materialities" and traveling cultural "imaginaries." This article presents a content analysis of media representations of cosmetic surgery tourism in a major country sending patient-tourists (the United States) and a popular receiv...

  16. Patient Selection in Plastic Surgery: Recognizing Body Dysmorphic Disorder

    OpenAIRE

    Cihan Sahin; Onat Yilmaz; Yalcin Bayram; Huseyin Karagoz; Celalettin Sever; Yalcin Kulahci; Alpay Ates

    2013-01-01

    Plastic surgery is a branch of medicine that provides significant improvements to the people with positive changes. But first of all, this branch has a characteristic which requires analysing patients' psychological situation very carefully. Plastic surgeons are often confronted by patients with mental disorders seeking aesthetic surgery. It is imperative for surgeons to recognize possible underlying psychiatric illnesses. Common psychiatric conditions seen in cosmetic surgery patients includ...

  17. Contour Tones.

    Science.gov (United States)

    Yip, Moira

    1989-01-01

    Argues that contour tones in East Asian languages behave as melodic units consisting of a root node [upper] dominating a branching specification. It is also argued that, with upper as the tonal root node, no more than two rising or falling tones will contrast underlying. (49 references) (JL)

  18. Female college students and cosmetic surgery: an investigation of experiences, attitudes, and body image.

    Science.gov (United States)

    Sarwer, David B; Cash, Thomas F; Magee, Leanne; Williams, Emily Fleming; Thompson, J Kevin; Roehrig, Megan; Tantleff-Dunn, Stacey; Agliata, Allison Kanter; Wilfley, Denise E; Amidon, Amy D; Anderson, Drew A; Romanofski, Michelle

    2005-03-01

    This large, multisite study investigated female college students' experiences with and attitudes about cosmetic surgery. The study also assessed the relationship between several aspects of body image, including appearance satisfaction and investment and symptoms of body dysmorphic disorder, and interest in cosmetic surgery. Thirty (5 percent) of the 559 women surveyed reported that they had undergone cosmetic surgery. Two thirds of respondents reported knowing someone who had received cosmetic surgery, and approximately one third indicated that a family member had undergone surgery. Overall, participants held relatively favorable attitudes about surgery. Regression analysis suggested that a greater psychological investment in physical appearance and greater internalization of mass media images of beauty predicted more favorable attitudes toward cosmetic surgery. Fourteen women (2.5 percent) screened positive for body dysmorphic disorder based on the nature and severity of their self-reported body-image concerns. Results of this study provide new information on young women's experiences and attitudes about cosmetic surgery and how these attitudes relate to body image. PMID:15731697

  19. Investigating Mental Status and Body Image in Cosmetic Surgery Applicants in Comparison with Non-applicants

    OpenAIRE

    Z Khanjani; J Babapour; G Saba

    2012-01-01

    Introduction: Today revising and rethinking of the appearance and eliminating its flaws, real or imaginary, through cosmetic surgery is the main concern of some individuals. This study was conducted in order to compare the body image, depression and anxiety disorders between applicants of cosmetic surgery and non-applicants. Methods: The present study is of cause–comparison type. Cosmetic surgery applicants involved 62 participants who were selected by available sampling from those who referr...

  20. Cosmetic Surgery

    Science.gov (United States)

    ... Body Looking and feeling your best Cosmetic surgery Cosmetic surgery Teens might have cosmetic surgery for a number ... about my body? What are the risks of cosmetic surgery? top People who have cosmetic surgery face many ...

  1. Cosmetic Surgery

    Science.gov (United States)

    ... Submit Home > Body Image > Cosmetic surgery Body Image Cosmetic surgery ASPS list of inappropriate candidates for surgery ... their appearance. Return to top Additional resources on cosmetic surgery Breast surgery Explore other publications and websites ...

  2. Attitudes toward Cosmetic Surgery in Middle-Aged Women: Body Image, Aging Anxiety, and the Media

    Science.gov (United States)

    Slevec, Julie; Tiggemann, Marika

    2010-01-01

    Our study investigated factors that influence attitudes toward cosmetic surgery in middle-aged women. A sample of 108 women, aged between 35 and 55 years, completed questionnaire measures of body dissatisfaction, appearance investment, aging anxiety, media exposure (television and magazine), and attitudes toward cosmetic surgery (delineated in…

  3. Body image in obese patients before and after stable weight reduction following bariatric surgery.

    Science.gov (United States)

    Adami, G F; Meneghelli, A; Bressani, A; Scopinaro, N

    1999-03-01

    The role of possessing an abnormal body weight in the body image alterations of obese patients was evaluated in bariatric surgery subjects prior to and at long term after operation, when body weight and shape had become steadily normalized. Body image was assessed by the body dissatisfaction scale of the Eating Disorders Inventory, the Body Shape Questionnaire, and the Body Attitude Questionnaire. When the individuals were obese, a sharply impaired body image was observed; following operation, weight loss corresponded to normalization of body dissatisfaction, feeling of fatness, and physical attractiveness, whereas body disparagement and salience of shape, although improved in comparison to preoperative data, remained significantly different from that of controls. In the obese patients, some aspects of body image alterations are substantially accounted for by overweight status; other aspects reflect inner feelings, which are partially independent of the actual body weight and shape. PMID:10193918

  4. Successful Removal of Large Intraocular Foreign Body by 25-Gauge Microincision Vitrectomy Surgery

    OpenAIRE

    Hiroshi Kunikata; Megumi Uematsu; Toru Nakazawa; Nobuo Fuse

    2011-01-01

    We describe a new technique for removing a large intraocular foreign body by 25-gauge microincision vitrectomy surgery (25G-MIVS). Noncomparative interventional case series were performed at a single centre. Two patients with a long smooth intraocular vitreal foreign body underwent phacoemulsification and aspiration, intraocular lens implantation, 25G-MIVS, and extraction of the foreign body. The foreign body was removed through a posterior capsulorhexis, anterior continuous curvilinear capsu...

  5. Quality of Life, Body Image and Sexual Functioning in Bariatric Surgery Patients.

    Science.gov (United States)

    Sarwer, David B; Steffen, Kristine J

    2015-11-01

    This article provides an overview of the literature on quality of life, body image and sexual behaviour in individuals with extreme obesity and who undergo bariatric surgery. Quality of life is a psychosocial construct that includes multiple domains, including health-related quality of life, weight-related quality of life, as well as other psychological constructs such as body image and sexual functioning. A large literature has documented the impairments in quality of life and these other domains in persons with obesity and extreme obesity in particular. These impairments are believed to play an influential role in the decision to undergo bariatric surgery. Individuals who undergo bariatric surgery typically report significant improvements in these and other areas of psychosocial functioning, often before they reach their maximum weight loss. The durability of these changes as patients maintain or regain weight, however, is largely unknown. PMID:26608946

  6. A Qualitative Assessment of the My True Body Bariatric Surgery Preparation Program

    Science.gov (United States)

    Nakamura, Tracy; Mamary, Edward

    2013-01-01

    Background: The My True Body (MTB) group intervention incorporates cognitive restructuring and social support into bariatric surgery preparation. Purpose: To identify and describe program components that support long-term behavioral modifications and influence confidence in healthy weight maintenance. Methods: Semistructured telephone interviews…

  7. 自体脂肪移植在面部轮廓整形中的应用%Autologous fat transplantation in facial contour surgery application

    Institute of Scientific and Technical Information of China (English)

    田霞; 李芸

    2013-01-01

    Objective To investigate the transplantation of autologous fat granules for improvement of facial contour, the restoration of facial volumejmprove facial aging methods and experience. Methods Using tumescent suction autologous subcutaneous fat,after cleaning, purified fat granule injection will be over 30% frontotemporal,chin,nose,nasal lip ditch, subcutaneous facial depression,wrinkles.sagging upper eyelid,lower eyelid sulcus. Results using autologous fat transplantation for facial contour shaping.filling the facial depression in 187 cases.a forming.no case of infection. With good histocompatibility,facial contour and aging can be improved.the results are satisfactory. Conclusion The use of autologous fat improve facial contour.the recovery of facial appearance.Simple operation,less trauma,good effectjs worth popularizing.%目的:探讨将自体脂肪颗粒移植用于改善面部轮廓,恢复面部容积,改善面部衰老的方法和体会.方法:用肿胀法抽吸自体皮下脂肪,经过清洗、提纯后将超量30%脂肪颗粒注入额颞部、下颏、鼻部、鼻唇沟、皮下皱纹、面部凹陷、上睑凹陷、下睑沟.结果:用自体脂肪移植用于面部轮廓整形,填充面部凹陷1 87例,多数一次成形,无一例感染.与组织相容性好,面部轮廓及衰老得以改善,结果均满意.结论:利用自体脂肪改善面部轮廓,恢复面部容貌.手术易行,创伤小,效果好,值得推广.

  8. Investigating Mental Status and Body Image in Cosmetic Surgery Applicants in Comparison with Non-applicants

    Directory of Open Access Journals (Sweden)

    Z Khanjani

    2012-06-01

    Full Text Available Introduction: Today revising and rethinking of the appearance and eliminating its flaws, real or imaginary, through cosmetic surgery is the main concern of some individuals. This study was conducted in order to compare the body image, depression and anxiety disorders between applicants of cosmetic surgery and non-applicants. Methods: The present study is of cause–comparison type. Cosmetic surgery applicants involved 62 participants who were selected by available sampling from those who referred to specialized centers for cosmetic surgery in Urumia during a three-month period; the non-applicants were homogenized with applicants regarding their age, gender, and level of education who were selected from the applicants’ relatives. So the study subjects were 124 individuals. Data were collected via a questionnaire about demographic characteristics, SCL-90-R and PSDQ questionnaires. The data were submitted to SPSS (ver. 16 and were analyzed using descriptive statistics, multivariable analysis of variance (MANOVA, and t-test. Results: Results showed that there is a significant difference between applicants for cosmetic surgery and non-applicants in regard to body image, depression and anxiety disorders. Conclusion: Like other medical specialties, cosmetic surgical interventions should undergo precise clinical trial before exerting on the patients. Therefore, Assessment and encouraging patients to refer to psychiatrists and consultants before operation is significant.

  9. Transnational Body Projects: Media Representations of Cosmetic Surgery Tourism in Argentina and the United States

    Directory of Open Access Journals (Sweden)

    Erynn Masi de Casanova

    2015-08-01

    Full Text Available Cosmetic surgery tourism (CST is part of the growing trend known as medical tourism. As people in the global North travel to less affluent countries to modify their bodies through cosmetic surgery, their transnational body projects are influenced by both economic "materialities" and traveling cultural "imaginaries." This article presents a content analysis of media representations of cosmetic surgery tourism in a major country sending patient-tourists (the United States and a popular receiving country (Argentina. The power relations of globalization appear to be played out in the media. U.S. sources assert U.S. hegemony through a discourse emphasizing the risks of CST in the global South, in contrast with medical excellence in the U.S. Argentine sources portray Argentina as a country struggling to gain a foothold in the global economy, but staking a claim on modernity through cultural and professional resources. The analyzed articles also offer a glimpse of how patient-tourists fuel sectors of the global economy by placing their bodies at the forefront, seeking to merge medical procedures and touristic pleasures. There is a gender dimension to these portrayals, as women are especially likely to engage in CST. Their transnational body projects are tainted by negative media portrayals, which represent them as ignorant, uninformed, and driven mainly by the low price of surgery overseas. Our comparative approach sheds light on converging and diverging perspectives on both ends of the cosmetic surgery tourism chain, showing that patterns in CST portrayals differ according to the position of a country in the world-system.

  10. Effect of irrigation fluid temperature on body temperature during arthroscopic elbow surgery in dogs

    Directory of Open Access Journals (Sweden)

    K.R. Thompson

    2013-10-01

    Full Text Available This prospective randomised clinical trial evaluated the effect of warmed irrigation fluid on body temperature in anaesthetised dogs undergoing arthroscopic elbow surgery. Nineteen dogs undergoing elbow arthroscopy were included in the study and were randomly allocated to one of two groups. Group RT received irrigation fluid at room temperature (RT while dogs in group W received warmed (W irrigation fluid (36oC. A standardised patient management and anaesthetic protocol was used and body temperature was measured at four time points; (T1 pre-anaesthetic examination, (T2 arrival into theatre, (T3 end of surgery and (T4 arrival into recovery. There was no significant difference in body temperature at any time point between the groups. The mean overall decrease in body temperature between pre-anaesthetic examination (T1 and return to the recovery suite (T4 was significant in both groups, with a fall of 1.06±0.58oC (p<0.001 in group RT and 1.53±0.76oC (p<0.001 group W. There was no significant difference between the groups. At the end of surgery (T3 4/19 (21.1% of dogs were hypothermic (<37oC. The addition of warmed irrigation fluids to a temperature management protocol in dogs undergoing elbow arthroscopy during general anaesthesia did not lead to decreased temperature losses.

  11. The Prevalence of Body Dysmorphic Disorder in Patients Undergoing Cosmetic Surgery: a Systematic Review.

    Science.gov (United States)

    Panayi, Andreana

    2015-09-01

    Body dysmorphic disorder (BDD) is a somatoform disorder characterised by a distressing obsession with an imagined or slight appearance defect, which can significantly impair normal day-to-day functioning. Patients with BDD often first present, and are hence diagnosed, in cosmetic surgery settings. Several studies have investigated the prevalence rate of BDD in the general population or have done so for patients referring to cosmetic medical centers. To date, however, no review has been undertaken to compare the prevalence in the general community versus in a cosmetic surgery setting. Despite the lack of such a review it is a commonly held belief that BDD is more common in patients seeking cosmetic surgery. The current study aims to review the available literature in order to investigate whether BDD is indeed more prevalent in patients requesting cosmetic surgery, and if that is the case, to provide possible reasons for the difference in prevalence. In addition this review provides evidence on the effectiveness of cosmetic surgery as a treatment of BDD. PMID:26417812

  12. Measuring outcomes in plastic surgery: body image and quality of life in abdominoplasty patients.

    Science.gov (United States)

    Bolton, Michael A; Pruzinsky, Thomas; Cash, Thomas F; Persing, John A

    2003-08-01

    Abdominoplasty is an increasingly common aesthetic surgery procedure that has yet to be evaluated using the most recently developed and psychometrically sophisticated measures of body image and quality-of-life outcomes. This study prospectively evaluated 30 consecutive female abdominoplasty patients, preoperatively and postoperatively, using measures of body image, psychological investment in appearance, and general psychosocial functioning. One-way repeated-measures (pretest versus posttest) analyses of variance revealed significant positive postsurgical changes on the Appearance Evaluation subscale of the Multidimensional Body-Self Relations Questionnaire. Mean scores for the questionnaire's Body Areas Satisfaction Scale improved postoperatively (p < 0.001). Scores for the Body Exposure and Sexual Relations Questionnaire also improved significantly (p < 0.001) postoperatively. These findings indicate significant improvements in body image outcome, including positive changes in patients' evaluations of their overall appearance, their average body image dissatisfaction, and their experiences of self-consciousness and avoidance of body exposure during sexual activities. As predicted, no changes were seen on any measure of psychological investment in appearance or on patients' reports of general psychosocial functioning (self-esteem, satisfaction with life, or social anxiety). PMID:12900625

  13. High Resolution Elevation Contours

    Data.gov (United States)

    Minnesota Department of Natural Resources — This dataset contains contours generated from high resolution data sources such as LiDAR. Generally speaking this data is 2 foot or less contour interval.

  14. Fairfax County Contours

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — This layer contains contours that were derived from the digital terrain model made up of irregularly spaced mass points and breaklines. The contours are 5 foot...

  15. Ocean Sediment Thickness Contours

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Ocean sediment thickness contours in 200 meter intervals for water depths ranging from 0 - 18,000 meters. These contours were derived from a global sediment...

  16. Tagged Vector Contour (TVC)

    Data.gov (United States)

    Kansas Data Access and Support Center — The Kansas Tagged Vector Contour (TVC) dataset consists of digitized contours from the 7.5 minute topographic quadrangle maps. Coverage for the state is incomplete....

  17. CONTOUR 7 Preview catalog

    OpenAIRE

    Gelder, Hilde Van

    2015-01-01

    This is an online publication on the website of CONTOUR 7, including both the English and the Dutch versions of my catalog essay entitled Lessons from Moria / Lessen uit Moria. The weblink is: http://contour7.be/files/uploads/page/CONTOUR7_PREVIEW_FOOLING_UTOPIA_CATALOG.pdf.

  18. Standardization of surgical techniques used in facial bone contouring.

    Science.gov (United States)

    Lee, Tae Sung

    2015-12-01

    Since the introduction of facial bone contouring surgery for cosmetic purposes, various surgical methods have been used to improve the aesthetics of facial contours. In general, by standardizing the surgical techniques, it is possible to decrease complication rates and achieve more predictable surgical outcomes, thereby increasing patient satisfaction. The technical strategies used by the author to standardize facial bone contouring procedures are introduced here. The author uses various pre-manufactured surgical tools and hardware for facial bone contouring. During a reduction malarplasty or genioplasty procedure, double-bladed reciprocating saws and pre-bent titanium plates customized for the zygomatic body, arch and chin are used. Various guarded oscillating saws are used for mandibular angloplasty. The use of double-bladed saws and pre-bent plates to perform reduction malarplasty reduces the chances of post-operative asymmetry or under- or overcorrection of the zygoma contours due to technical faults. Inferior alveolar nerve injury and post-operative jawline asymmetry or irregularity can be reduced by using a guarded saw during mandibular angloplasty. For genioplasty, final placement of the chin in accordance with preoperative quantitative analysis can be easily performed with pre-bent plates, and a double-bladed saw allows more procedural accuracy during osteotomies. Efforts by the surgeon to avoid unintentional faults are key to achieving satisfactory results and reducing the incidence of complications. The surgical techniques described in this study in conjunction with various in-house surgical tools and modified hardware can be used to standardize techniques to achieve aesthetically gratifying outcomes. PMID:26346781

  19. Successful Removal of Large Intraocular Foreign Body by 25-Gauge Microincision Vitrectomy Surgery

    Directory of Open Access Journals (Sweden)

    Hiroshi Kunikata

    2011-01-01

    Full Text Available We describe a new technique for removing a large intraocular foreign body by 25-gauge microincision vitrectomy surgery (25G-MIVS. Noncomparative interventional case series were performed at a single centre. Two patients with a long smooth intraocular vitreal foreign body underwent phacoemulsification and aspiration, intraocular lens implantation, 25G-MIVS, and extraction of the foreign body. The foreign body was removed through a posterior capsulorhexis, anterior continuous curvilinear capsulorhexis, and a corneal incision. In both cases, the foreign body was safely removed through the corneal incision, and IOL was implanted and well positioned. The surgical incision did not require suturing. No postoperative complications associated with this technique were found. The corneal endothelial cell density was maintained over 2000 cells/mm2 in both cases during recent follow-up examinations. Our findings indicate that 25G-MIVS with this technique can be used to extract a long slender smooth foreign body. It is safe, without complications, and can be performed without enlarging the 25-gauge sclerotomy.

  20. 岩土介质中不良地质体轮廓探测技术研究%Technology for Detection of Contour of Bad Geological Bodies in Rock and Soil Media

    Institute of Scientific and Technical Information of China (English)

    叶英

    2011-01-01

    It is difficult to detect the contours of the bad geological bodies ahead of the excavation faces of underground works in case of huge overburdens or complex ground surface conditions.The contours of bad geological bodies are detected by means of seismic waves "angle + position" offset system.The mechanisms and importance of the seismic waves angle offset system in the detection of underground 3D bodies are discussed.The rationality and feasibility of angle offset system in the detection of contours of bad geological bodies in underground works are further presented by means of studying on the mechanisms of ocular bionics.Conclusions drawn are follows: due to the small space needed, the angle offset system is suitable for the detection of the contours of bad geological bodies ahead of the excavation face of underground works;the application of the "angle + position" offset system in the detection of weak rock mass has achieved good result.%为解决埋深较大或地面条件复杂的地下工程开挖前方不良地质体轮廓探测不易从地面展开的难题,利用地震波"角度+位置"偏移的联合体系探测隧道施工前方不良地质体的形状,通过对地面地震波位置偏移法探测三维形状体的研究分析,论述地震波角度偏移在探测地下三维形状体的理论与重要作用,并借用人眼仿生学的原理进一步阐述角度偏移在地下工程前方探测的合理性与可行性.得出以下结论:角度偏移技术不需占用较大空间,非常适合地下工程开挖掌子面有限空间的前方不良地质体轮廓探测,利用"角度+位置"偏移的联合体系探测软弱岩体取得了很好的实际效果.

  1. Little effect of physical training on body composition and nutritional intake following colorectal surgery - a randomised placebo-controlled trial

    DEFF Research Database (Denmark)

    Houborg, KB; Jensen, Martin Bach; Hessov, Ib.;

    2005-01-01

    Objective: Postoperatively patients have a reduction in nutritional intake and body weight. We studied the effect of postoperative physical training on nutritional intake and body composition. Methods: Patients greater than or equal to60 y admitted for elective colorectal surgery were randomised to...... between groups in weight, LBM, or FM. The energy and protein intake rose during postoperative day 1–7 and rose further after discharge. At no time were differences between groups. Conclusion: Physical training had little effect on body composition following abdominal surgery. The nutritional intake in...

  2. Distributed Contour Trees

    Energy Technology Data Exchange (ETDEWEB)

    Morozov, Dmitriy; Weber, Gunther H.

    2014-03-31

    Topological techniques provide robust tools for data analysis. They are used, for example, for feature extraction, for data de-noising, and for comparison of data sets. This chapter concerns contour trees, a topological descriptor that records the connectivity of the isosurfaces of scalar functions. These trees are fundamental to analysis and visualization of physical phenomena modeled by real-valued measurements. We study the parallel analysis of contour trees. After describing a particular representation of a contour tree, called local{global representation, we illustrate how di erent problems that rely on contour trees can be solved in parallel with minimal communication.

  3. Reconstruction of surfaces from planar contours through contour interpolation

    Science.gov (United States)

    Sunderland, Kyle; Woo, Boyeong; Pinter, Csaba; Fichtinger, Gabor

    2015-03-01

    Segmented structures such as targets or organs at risk are typically stored as 2D contours contained on evenly spaced cross sectional images (slices). Contour interpolation algorithms are implemented in radiation oncology treatment planning software to turn 2D contours into a 3D surface, however the results differ between algorithms, causing discrepancies in analysis. Our goal was to create an accurate and consistent contour interpolation algorithm that can handle issues such as keyhole contours, rapid changes, and branching. This was primarily motivated by radiation therapy research using the open source SlicerRT extension for the 3D Slicer platform. The implemented algorithm triangulates the mesh by minimizing the length of edges spanning the contours with dynamic programming. The first step in the algorithm is removing keyholes from contours. Correspondence is then found between contour layers and branching patterns are determined. The final step is triangulating the contours and sealing the external contours. The algorithm was tested on contours segmented on computed tomography (CT) images. Some cases such as inner contours, rapid changes in contour size, and branching were handled well by the algorithm when encountered individually. There were some special cases in which the simultaneous occurrence of several of these problems in the same location could cause the algorithm to produce suboptimal mesh. An open source contour interpolation algorithm was implemented in SlicerRT for reconstructing surfaces from planar contours. The implemented algorithm was able to generate qualitatively good 3D mesh from the set of 2D contours for most tested structures.

  4. Sodium Deoxycholate for Submental Contouring.

    Science.gov (United States)

    Humphrey, S; Beleznay, K; Beleznay, J D A

    2016-09-01

    The chin and jaw line are integral parts of an individual's aesthetic profile, and the presence of submental fat detracts from this and can lead to displeasure with one's facial appearance. While liposuction and cosmetic surgery are regarded as the gold standard in treating submental fat, surgical intervention is not appealing to all patients and has potential surgical complications including longer recovery, and contour irregularities. Despite ample advances in aesthetic medicine to enhance the appearance of the face, very little is available in non-invasive options to reduce submental fat that has been supported by robust evidence. ATX-101, a proprietary formulation of deoxycholic acid that is synthetically derived, has been extensively explored in a vigorous clinical development program that has established the safety and efficacy of the injectable. It has recently received approval by regulatory authorities in Canada (Belkyra™) and the US (Kybella®) for the treatment of submental fat. PMID:27603325

  5. Men, appearance, and cosmetic surgery: The role of confidence, self-esteem, and comfort with the body

    OpenAIRE

    Rosemary Ricciardelli; Kimberley Ann Clow

    2009-01-01

    This paper situates male perceptions of the body within Bourdieu’s theories of human practice. Recent research (Bordo 1999; Featherstone 1991; Giddens 1991; Gill, Henwood, and McLean 2005) has suggested that perceptions of the body are important to men’s sense of confidence and that men see the body as a vehicle for personal improvement. To build on this research, an online survey investigated Canadian men’s perspectives on their appearance and their attitudes toward cosmetic surgery. A two-c...

  6. Dietary Supplementation at Home Improves the Regain of Lean Body Mass After Surgery

    DEFF Research Database (Denmark)

    Jensen, Martin Bach; Hessov, Ib

    1997-01-01

    Little is known about nutritional intake after discharge though it takes months to regain preoperative weight after gastrointestinal surgery. We studied whether a 4-mo intervention with dietary advice and protein-rich supplements would increase nutritional intake and gain in lean body mass (LBM...... with the intake of the general population that did not increase further. During the 4 m, the intervention patients had an increased intake of protein (+22%) and energy (+16%), and an enhanced gain of LBM after 2 mo (control 0.8 kg versus intervention 2.1 kg; P = 0.009). After the 4-mo intervention, both LBM...... and fat were gained (control 1.7 kg LBM and 0.2 kg fat versus intervention 3.1 kg LBM and 1.5 kg fat; LBM: P = 0.029 and fat: P = 0.056). At discharge patients should increase protein intake to 1.5 g·kg−1·d−1 for 2 mo, e.g., by taking protein-rich liquid supplements....

  7. Radiobiological mechanisms of stereotactic body radiation therapy and stereotactic radiation surgery

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Mi Sook; Kim, Won Woo; Park, In Hwan; Kim, Hee Jong; Lee, Eun Jin; Jung, Jae Hoon [Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Cho, Lawrence Chin Soo; Song, Chang W. [Dept. of Radiation Oncology, University of Minnesota Medical School, Minneapolis (United States)

    2015-12-15

    Despite the increasing use of stereotactic body radiation therapy (SBRT) and stereotactic radiation surgery (SRS) in recent years, the biological base of these high-dose hypo-fractionated radiotherapy modalities has been elusive. Given that most human tumors contain radioresistant hypoxic tumor cells, the radiobiological principles for the conventional multiple-fractionated radiotherapy cannot account for the high efficacy of SBRT and SRS. Recent emerging evidence strongly indicates that SBRT and SRS not only directly kill tumor cells, but also destroy the tumor vascular beds, thereby deteriorating intratumor microenvironment leading to indirect tumor cell death. Furthermore, indications are that the massive release of tumor antigens from the tumor cells directly and indirectly killed by SBRT and SRS stimulate anti-tumor immunity, thereby suppressing recurrence and metastatic tumor growth. The reoxygenation, repair, repopulation, and redistribution, which are important components in the response of tumors to conventional fractionated radiotherapy, play relatively little role in SBRT and SRS. The linear-quadratic model, which accounts for only direct cell death has been suggested to overestimate the cell death by high dose per fraction irradiation. However, the model may in some clinical cases incidentally do not overestimate total cell death because high-dose irradiation causes additional cell death through indirect mechanisms. For the improvement of the efficacy of SBRT and SRS, further investigation is warranted to gain detailed insights into the mechanisms underlying the SBRT and SRS.

  8. Capturing lightness between contours.

    Science.gov (United States)

    Vergeer, Mark; van Lier, Rob

    2010-01-01

    Homogeneously coloured bars may exhibit lightness differences at the intersections. A well-known example is the Hermann grid illusion, where crossing white bars on a black background show dark patches at the crossings. Jung (1973, Handbook of Sensory Physiology volume VII/3, pp 1-152) found that the dark patches persist when thin outlines are drawn at the intersections, and are even visible in foveal vision. Recently, it has been shown that making distortions to the contours of a Hermann grid-like configuration results in the disappearance of the illusory dark spots (Geier et al, 2008 Perception 37 651 665). We show that thin outlines at the crossings of the distorted Hermann grid induce lightness differences in the same direction as in the original Hermann grid illusion, even in foveal vision and in displays consisting of two crossing bars. Our experiments reveal that the induced lightness differences are independent of the luminance polarity and shape of the contours at the intersection. We suggest that the effect results from lateral inhibition and an additional spreading and capturing of these differences between luminance contours. A similar capturing between collinear contours may play a role in peripheral vision in the original Hermann grid.

  9. LEPTIN, A NEW PROINFLAMMATORY MARKER AND BODY COMPOSITION – CORRELATIONS DURING EARLY POSTOPERATIVE PERIOD AFTER MAJOR SURGERY

    Directory of Open Access Journals (Sweden)

    D. Rusu

    2011-11-01

    Full Text Available Introduction: Leptin is an adipokine regulating energy balance but recently has been related to immune system and inflammatory response. Objectives: To investigate the correlation between leptin plasma level and body composition in patients with signs of systemic inflammatory response syndrome after major abdominal surgery and to characterise early dynamics of this and other proinflamatory cytokines in such patients. Methods: We prospectivelly enrolled 40 patients divided in 2 groups: study group (20 pts – patients with major abdominal surgery and signs of SIRS and control group (20 pts – preoperative patients without inflammatory disease. Plasma concentration of leptin, CPR and IL6 were measured preoperatively in both groups and in first three days postoperative (9 samples in the study group. Body composition (percent of body fat, lean body mass, total body water was recorded using bioelectrical impedance analysis method. Results: In control group leptin has a positive correlation (r2=0.52 with the percent of body fat. In study group this correlation is present (r=0.85 preoperatively but is lost at 24,48 and 72 hours postoperative measurements (r=0.04, 0.07, 0.15. In study group leptin acts as a pro-inflammatory cytokine. The plasmatic peak of 17.31 ng/ml is reached at 12 h, later than IL 6 (plasmatic peak at 6h but earlier comparing with CRP (plasmatic peak at 24h. Conclusions: In patients with major abdominal surgery and SIRS leptin acts as a proinflammatory mediator with mainly extraadipocitary source. Leptin has specific early dynamics and may be useful as an early diagnostic marker of systemic inflammation.

  10. Contours, 2006 Contour Lines, Published in 2006, Johnson County, Iowa.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset as of 2006. It is described as '2006 Contour Lines'. Data by this publisher are often provided in State Plane coordinate system; in a Lambert...

  11. Impact of preoperative weight loss and body composition changes on postoperative outcome in surgery for inflammatory bowel disease.

    OpenAIRE

    Higgens, C S; Keighley, M. R.; Allan, R N

    1984-01-01

    One hundred and twenty seven patients undergoing elective surgery for inflammatory bowel disease were divided into three groups according to their preoperative ideal body weight (less than 80%, 80-90%, and greater than 90%). The groups were well matched in respect of age, sex, corticosteroid therapy, pre-existing sepsis, peroperative antimicrobial chemotherapy, and resection site. None received peroperative nutritional support. The postoperative outcome was similar in each of the three nutrit...

  12. Variation in contour and cancer of stomach

    International Nuclear Information System (INIS)

    There were four types of stomach contour included eutonic, hypotonic, steerhorn, and cascade. The aim of this study is to clarify relationship between incidence of stomach cancer and contour variation of the stomach. Double- contrast upper gastrointestinal study was performed in 1,546 patients, who had dyspepsia or other gastrointestinal tract symptoms. The radiographs were classified into the four types including eutonic, hypotonic, steerhorn, and cascade according to stomach contour in relation to body build. We also reviewed pathologic reports on endoscopic biopsy or surgical specimen. We studied the presence of relationship between incidence of stomach cancer and variation of stomach contour. We also examined the incidence of gastritis and gastric ulcer to the stomach contour variation. Of total 1,546 patients, eutonic stomach were 438(28.3%), hypotonic 911(58.9%), steerhorn 102(6.5%) and cascade 95(6.2%). Stomach cancer was found in 139(31.7%) of 438 eutonic stomachs, in 135(14.8%) of 911 hypotonic, in 42(41.2%) of 102 steerhorn, and in 24(36.9%) of 95 cascade (P=0.001). In hypotonic stomach, the incidence of stomach cancer was lower compared to the other three types significantly (p<0.05). Gastritis or gastric ulcer was found in 146(33.3%) of eutonic stomach, in 293(32.1%) of hypotonic, in 36(35.2%) of steerhorn, and in 26(27.3%) of cascade (p=0.640). In conclusion, gastric contour variation seems to be a factor affecting development of stomach cancer. The patients with hypotonic stomach may have lower incidence of stomach cancer than that of the other types. There was no relationship between the contour and gastric ulcer

  13. Variation in contour and cancer of stomach

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Won Hong; Hwang, Seon Moon [Asan Medical Center, Asan (Korea, Republic of); Yoon, Kwon Ha [College of Medicine, Wonkwang Univ., Iksan (Korea, Republic of)

    1999-04-01

    There were four types of stomach contour included eutonic, hypotonic, steerhorn, and cascade. The aim of this study is to clarify relationship between incidence of stomach cancer and contour variation of the stomach. Double- contrast upper gastrointestinal study was performed in 1,546 patients, who had dyspepsia or other gastrointestinal tract symptoms. The radiographs were classified into the four types including eutonic, hypotonic, steerhorn, and cascade according to stomach contour in relation to body build. We also reviewed pathologic reports on endoscopic biopsy or surgical specimen. We studied the presence of relationship between incidence of stomach cancer and variation of stomach contour. We also examined the incidence of gastritis and gastric ulcer to the stomach contour variation. Of total 1,546 patients, eutonic stomach were 438(28.3%), hypotonic 911(58.9%), steerhorn 102(6.5%) and cascade 95(6.2%). Stomach cancer was found in 139(31.7%) of 438 eutonic stomachs, in 135(14.8%) of 911 hypotonic, in 42(41.2%) of 102 steerhorn, and in 24(36.9%) of 95 cascade (P=0.001). In hypotonic stomach, the incidence of stomach cancer was lower compared to the other three types significantly (p<0.05). Gastritis or gastric ulcer was found in 146(33.3%) of eutonic stomach, in 293(32.1%) of hypotonic, in 36(35.2%) of steerhorn, and in 26(27.3%) of cascade (p=0.640). In conclusion, gastric contour variation seems to be a factor affecting development of stomach cancer. The patients with hypotonic stomach may have lower incidence of stomach cancer than that of the other types. There was no relationship between the contour and gastric ulcer.

  14. Body mass index, conversion rate and complications among patients undergoing robotic surgery for endometrial carcinoma.

    Science.gov (United States)

    Cunningham, Mary J; Dorzin, Esther; Nguyen, Loan; Anderson, Elizabeth; Bunn, W Douglas

    2015-12-01

    A retrospective cohort study was performed to evaluate the relationship of BMI to conversion rate in patients undergoing robotic surgery for endometrial cancer. Secondary outcomes were operative times, number of lymph nodes retrieved, and complications. Women with endometrial cancer scheduled for robotic surgery from September 2008 to September 2012 were included. Women were divided into three groups based on BMI, and conversion rates to laparotomy were compared. Descriptive and comparative analyses were performed among non-obese, obese, and morbidly obese women who completed robotic surgery. 298 women were scheduled for robotic surgery for endometrial carcinoma: 87 non-obese (BMI 19-29, μ 25.23), 110 obese (BMI 30-39, μ 34.21), and 101 morbidly obese (BMI 40-71, μ 47.38). Conversion to laparotomy occurred in 18 patients (6%), with no difference in conversion rate between BMI categories. Direct comparison between converted and completed robotic patients showed no significant differences in preoperative characteristics, except that patients who required conversion had a higher number of previous abdominal surgeries. Patients completing robotic surgery underwent node dissections at similar rates in all three BMI categories. Operating room time, but not surgical time, was increased in morbidly obese patients. There were no significant differences in complications, performance of lymphadenectomy, or lymph node yields between BMI categories. Increase in BMI was not associated with an increase in rate of conversion to laparotomy or complication rate in patients undergoing robotic surgery for endometrial carcinoma. Node dissections were pathologically equivalent between BMI categories.

  15. Bathymetric Contours - Gulf of Mexico

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This dataset consists of a vector coverage of bathymetric contours with increasing resolution in coastal areas. Contours were derived from gridded National Ocean...

  16. Template-Based Active Contours

    OpenAIRE

    Mogali, Jayanth Krishna; Pediredla, Adithya Kumar; Seelamantula, Chandra Sekhar

    2013-01-01

    We develop a generalized active contour formalism for image segmentation based on shape templates. The shape template is subjected to a restricted affine transformation (RAT) in order to segment the object of interest. RAT allows for translation, rotation, and scaling, which give a total of five degrees of freedom. The proposed active contour comprises an inner and outer contour pair, which are closed and concentric. The active contour energy is a contrast function defined based on the intens...

  17. Body image, psychosocial functioning, and personality: how different are adolescents and young adults applying for plastic surgery?

    Science.gov (United States)

    Simis, K J; Verhulst, F C; Koot, H M

    2001-07-01

    This study addressed three questions: (1) Do adolescents undergoing plastic surgery have a realistic view of their body? (2) How urgent is the psychosocial need of adolescents to undergo plastic surgery? (3) Which relations exist between bodily attitudes and psychosocial functioning and personality? From 1995 to 1997, 184 plastic surgical patients aged 12 to 22, and a comparison group of 684 adolescents and young adults from the general population aged 12 to 22 years, and their parents, were interviewed and completed questionnaires and standardised rating scales. Adolescents accepted for plastic surgery had realistic appearance attitudes and were psychologically healthy overall. Patients were equally satisfied with their overall appearance as the comparison group, but more dissatisfied with the specific body parts concerned for operation, especially when undergoing corrective operations. Patients had measurable appearance-related psychosocial problems. Patient boys reported less self-confidence on social areas than all other groups. There were very few patient-comparison group differences in correlations between bodily and psychosocial variables, indicating that bodily attitudes and satisfaction are not differentially related to psychosocial functioning and self-perception in patients than in peers. We concluded that adolescents accepted for plastic surgery have considerable appearance-related psychosocial problems, patients in the corrective group reporting more so than in the reconstructive group. Plastic surgeons may assume that these adolescents in general have a realistic attitude towards their appearance. are psychologically healthy, and are mainly dissatisfied about the body parts concerned for operation. corrective patients more so than reconstructive patients. Introverted patients may need more attention from plastic surgeons during the psychosocial assessment. PMID:11464971

  18. Evaluation for asbestos exposure in lung cancer surgery cases. Relationships between asbestos body count and pleural plaques and between asbestos body count and pulmonary fibrosis

    International Nuclear Information System (INIS)

    This study was designed to examine the significance of pleural plaques and pulmonary fibrosis in the evaluation of asbestos exposure level. The subjects were patients who had undergone surgery for lung cancer. There were 64 patients who had pleural plaques based on surgical findings (pleural plaque group) and 9 patients who had neither a history of asbestos exposure nor pleural plaque (control group). An examination was performed regarding the extent of pleural plaques and the presence or absence of pulmonary fibrosis. The relationships between these findings and the asbestos body count in the resected lung were investigated. If chest CT showed no pleural plaque, the case was classified as class 0. If chest CT showed pleural plaques, the CT slice with the most extensive pleural plaque in either side was selected. If the plaque extended to less than one quarter of the inner chest wall, the case was classified as class 1. If the extent was one quarter or more, the case was classified as class 2. The cases were considered to have pulmonary fibrosis if the fibrotic findings were equivalent to those of asbestosis of type 1 or more by chest X-ray photography (XP) and if fibrosis was observed in CT. All other cases were considered not to have pulmonary fibrosis. The median asbestos body counts were 1,018 bodies per gram of dried lung in the pleural plaque group and 263 per gram of dried lung in the control group. There was a statistically significant difference between these groups (p=0.0034). There were 25 patients with class 0 pleural plaque, 17 patients with class 1, and 22 patients with class 2. Their median asbestos body counts were 612, 439, and 5,626 bodies, respectively. All class 0 or 1 patients had an asbestos body count of less than 5,000 bodies. There was no significant difference in the counts between patients with class 0 and 1. All class 2 patients had an asbestos body count of 1,000 bodies or more. The count of class 2 patients was significantly higher

  19. Female genital mutilation and cosmetic surgery: regulating non-therapeutic body modification.

    Science.gov (United States)

    Sheldon, Sally; Wilkinson, Stephen

    1998-10-01

    In the UK, female genital mutilation is unlawful, not only when performed on minors, but also when performed on adult women. The aim of our paper is to examine several arguments which have been advanced in support of this ban and to assess whether they are sufficient to justify banning female genital mutilation for competent, consenting women. We proceed by comparing female genital mutilation, which is banned, with cosmetic surgery, towards which the law has taken a very permissive stance. We then examine the main arguments for the prohibition of the former, assessing in each case both (a) whether the argument succeeds in justifying the ban and, if so, (b) whether a parallel argument would not also support a ban on the latter. We focus on the following arguments. Female genital mutilation should be unlawful because: (1) no woman could validly consent to it; (2) it is an oppressive and sexist practice; (3) it involves the intentional infliction of injury; (4) it causes offence. Our view is that arguments (3) and (4) are unsound and that, although arguments (1) and (2) may be sound, they support not only a ban on female genital mutilation, but also one on (some types of) cosmetic surgery. Hence, we conclude that the present legal situation in the UK is ethically unsustainable in one of the following ways. Either the ban on female genital mutilation is unjustified because arguments (1) and (2) are not in fact successful; or the law's permissive attitude towards cosmetic surgery is unjustified because arguments (1) and (2) are in fact successful and apply equally to female genital mutilation and (certain forms of) cosmetic surgery. The people of the countries where female genital mutilation is practised resent references to 'barbaric practices imposed on women by male-dominated primitive societies', especially when they look at the Western world and see women undergoing their own feminization rites intended to increase sexual desirability: medically dangerous forms of

  20. Prognostic factors in patients with advanced cholangiocarcinoma:Role of surgery,chemotherapy and body mass index

    Institute of Scientific and Technical Information of China (English)

    Mirna H Farhat; Ali I Shamseddine; Ayman N Tawil; Ghina Berjawi; Charif Sidani; Wael Shamseddeen; Kassem A Barada

    2008-01-01

    AIM:To study the factors that may affect survival of cholangiocarcinoma in Lebanon.METHODS:A retrospective review of the medical records of 55 patients diagnosed with cholangiocarcinoma at the American University of Beirut between 1990 and 2005 was conducted.Univariate and multivariate analyses were performed to determine the impact of surgery,chemotherapy,body mass index,bilirubin level and other factors on survival.RESULTS:The median survival of all patients was 8.57 mo (0.03-105.2).Univariate analysis showed that low bilirubin level (<10 mg/dL),radical surgery and chemotherapy administration were significantly associated with better survival (P = 0.012,0.038 and 0.038,respectively).In subgroup analysis on patients who had no surgery,chemotherapy administration prolonged median survival significantly (17.0 mo vs 3.5 too,P = 0.001).Multivariate analysis identified only low bilirubin level < 10 mg/dL and chemotherapy administration as independent predictors associated with better survival (P < 0.05).CONCLUSION:Our data show that palliative and postoperative chemotherapy as well as a bilirubin level < 10 mg/dL are independent predictors of a significant increase in survival in patients with cholangiocarcinoma.

  1. Plastic paradise: transforming bodies and selves in Costa Rica's cosmetic surgery tourism industry.

    Science.gov (United States)

    Ackerman, Sara L

    2010-10-01

    Long popular as a nature tourism destination, Costa Rica has recently emerged as a haven for middle class North Americans seeking inexpensive, state-of-the-art cosmetic surgery. This paper examines "cosmetic surgery tourism" in Costa Rica as a form of medicalized leisure, situated in elite private spaces and yet inextricably linked to a beleaguered national medical program. Through historical context and ethnographic analysis of activities at medical hotels and clinics, I describe how the recovery industry operates on the embodied subjectivities of visiting patients and their local caretakers. Recovery sociality and healing landscapes facilitate patients' transition through a period of post-surgical liminality and provide nostalgic transport to an imagined medical arcadia, while clinicians are attracted by a neoliberal promise of prosperity and autonomy. Ultimately, Costa Rica's transformation into a paradise of medical consumption and self-optimization is contingent on a mythology that obscures growing uncertainties and inequities in the nation's broader medical landscape. PMID:21082485

  2. Plastic paradise: transforming bodies and selves in Costa Rica's cosmetic surgery tourism industry.

    Science.gov (United States)

    Ackerman, Sara L

    2010-10-01

    Long popular as a nature tourism destination, Costa Rica has recently emerged as a haven for middle class North Americans seeking inexpensive, state-of-the-art cosmetic surgery. This paper examines "cosmetic surgery tourism" in Costa Rica as a form of medicalized leisure, situated in elite private spaces and yet inextricably linked to a beleaguered national medical program. Through historical context and ethnographic analysis of activities at medical hotels and clinics, I describe how the recovery industry operates on the embodied subjectivities of visiting patients and their local caretakers. Recovery sociality and healing landscapes facilitate patients' transition through a period of post-surgical liminality and provide nostalgic transport to an imagined medical arcadia, while clinicians are attracted by a neoliberal promise of prosperity and autonomy. Ultimately, Costa Rica's transformation into a paradise of medical consumption and self-optimization is contingent on a mythology that obscures growing uncertainties and inequities in the nation's broader medical landscape.

  3. Evaluation of Body Image and Sexual Satisfaction in Women Undergoing Female Genital Plastic/Cosmetic Surgery

    OpenAIRE

    Goodman, Michael P; Placik, Otto J; Matlock, David L; Simopoulos, Alex F; Dalton, Teresa A; Veale, David; Hardwick-Smith, Susan

    2016-01-01

    BACKGROUND: Little prospective data exists regarding the procedures constituting female genital plastic/cosmetic surgery (FGPS).OBJECTIVES: To evaluate whether the procedures of labiaplasty and vaginoperineoplasty improve genital self image, and evaluate effects on sexual satisfaction.METHODS: Prospective cohort case-controlled study of 120 subjects evaluated at baseline, 6, 12, and 24 months postoperative, paired with a demographically similar control group. Interventions include labiaplasty...

  4. Modifying the Body: Canadian Men's Perspectives on Appearance and Cosmetic Surgery

    Science.gov (United States)

    Ricciardelli, Rosemary; White, Philip

    2011-01-01

    In postmodern scholarship there has been a temporal shift to thinking of the body as malleable rather than fixed, which has opened space for the remaking of the self via the remaking of the body (Featherstone, 1991; Giddens, 1991). Among men, this process is thought to interact with shifting understandings of masculinity. In this study, 14…

  5. Management of bladder stones associated with foreign bodies following incontinence and contraception surgery

    Directory of Open Access Journals (Sweden)

    Abdulmuttalip Simsek

    2014-06-01

    Full Text Available Aim of the study: To investigate success of endoscopic lithotripsy for bladder stone following stress urinary incontinance surgery and contraception surgery. Materials and methods: Charts of patients admitted in two centers between January 2006 and March 2013 were retrospectively reviewed and seven women were enrolled in our study. Patients demographic parameters including age, main complaint(s, previous surgery type, time to diagnosis were analyzed. Also operative time, hospitalisation lenght, perioperative and postoperative complication( s were evaluated. Results: Five patients had undergone tension free vaginal tape procedure and one patient had undergone transobturator tape procedure. Median age was 62 (50-71 years. In one patient bladder stone formed around an intrauterine device. Dysuria (85%, hematuria (57% and recurrent urinary tract infection (57% were the main complaints. The median diagnosis time was 44.1 months. Abdominal ultrasonography and non contrast enhanced computer tomography were performed for five and two patients respectively and diagnosis was confirmed cystoscopically. Endoscopic lithotripsy using Holmium laser lithotripter or pneumatic lithotripter was used for all cases. The mean operation time was 41.2 minutes (20-70 and success was 100%. There was no intraoperative complication. Only one patient had fever higher than 38ºC postoperatively and was treated by appropriate antibiotic. The median hospitalisation time was 1.57 day. Conclusion: In conclusion endoscopic lithotripsy is a safe and effective approach to manage bladder stone associated with mid-urethral synthetic slings and intrauterine devices.

  6. Comparison of quality of life after stereotactic body radiotherapy and surgery for early-stage prostate cancer

    Directory of Open Access Journals (Sweden)

    Katz Alan

    2012-11-01

    Full Text Available Abstract Background As the long-term efficacy of stereotactic body radiation therapy (SBRT becomes established and other prostate cancer treatment approaches are refined and improved, examination of quality of life (QOL following prostate cancer treatment is critical in driving both patient and clinical treatment decisions. We present the first study to compare QOL after SBRT and radical prostatectomy, with QOL assessed at approximately the same times pre- and post-treatment and using the same validated QOL instrument. Methods Patients with clinically localized prostate cancer were treated with either radical prostatectomy (n = 123 Spanish patients or SBRT (n = 216 American patients. QOL was assessed using the Expanded Prostate Cancer Index Composite (EPIC grouped into urinary, sexual, and bowel domains. For comparison purposes, SBRT EPIC data at baseline, 3 weeks, 5, 11, 24, and 36 months were compared to surgery data at baseline, 1, 6, 12, 24, and 36 months. Differences in patient characteristics between the two groups were assessed using Chi-squared tests for categorical variables and t-tests for continuous variables. Generalized estimating equation (GEE models were constructed for each EPIC scale to account for correlation among repeated measures and used to assess the effect of treatment on QOL. Results The largest differences in QOL occurred in the first 1–6 months after treatment, with larger declines following surgery in urinary and sexual QOL as compared to SBRT, and a larger decline in bowel QOL following SBRT as compared to surgery. Long-term urinary and sexual QOL declines remained clinically significantly lower for surgery patients but not for SBRT patients. Conclusions Overall, these results may have implications for patient and physician clinical decision making which are often influenced by QOL. These differences in sexual, urinary and bowel QOL should be closely considered in selecting the right treatment

  7. Comparison of quality of life after stereotactic body radiotherapy and surgery for early-stage prostate cancer

    International Nuclear Information System (INIS)

    As the long-term efficacy of stereotactic body radiation therapy (SBRT) becomes established and other prostate cancer treatment approaches are refined and improved, examination of quality of life (QOL) following prostate cancer treatment is critical in driving both patient and clinical treatment decisions. We present the first study to compare QOL after SBRT and radical prostatectomy, with QOL assessed at approximately the same times pre- and post-treatment and using the same validated QOL instrument. Patients with clinically localized prostate cancer were treated with either radical prostatectomy (n = 123 Spanish patients) or SBRT (n = 216 American patients). QOL was assessed using the Expanded Prostate Cancer Index Composite (EPIC) grouped into urinary, sexual, and bowel domains. For comparison purposes, SBRT EPIC data at baseline, 3 weeks, 5, 11, 24, and 36 months were compared to surgery data at baseline, 1, 6, 12, 24, and 36 months. Differences in patient characteristics between the two groups were assessed using Chi-squared tests for categorical variables and t-tests for continuous variables. Generalized estimating equation (GEE) models were constructed for each EPIC scale to account for correlation among repeated measures and used to assess the effect of treatment on QOL. The largest differences in QOL occurred in the first 1–6 months after treatment, with larger declines following surgery in urinary and sexual QOL as compared to SBRT, and a larger decline in bowel QOL following SBRT as compared to surgery. Long-term urinary and sexual QOL declines remained clinically significantly lower for surgery patients but not for SBRT patients. Overall, these results may have implications for patient and physician clinical decision making which are often influenced by QOL. These differences in sexual, urinary and bowel QOL should be closely considered in selecting the right treatment, especially in evaluating the value of non-invasive treatments, such as SBRT

  8. Contour Completion Without Region Segmentation.

    Science.gov (United States)

    Ming, Yansheng; Li, Hongdong; He, Xuming

    2016-08-01

    Contour completion plays an important role in visual perception, where the goal is to group fragmented low-level edge elements into perceptually coherent and salient contours. Most existing methods for contour completion have focused on pixelwise detection accuracy. In contrast, fewer methods have addressed the global contour closure effect, despite psychological evidences for its importance. This paper proposes a purely contour-based higher order CRF model to achieve contour closure, through local connectedness approximation. This leads to a simplified problem structure, where our higher order inference problem can be transformed into an integer linear program and be solved efficiently. Compared with the methods based on the same bottom-up edge detector, our method achieves a superior contour grouping ability (measured by Rand index), a comparable precision-recall performance, and more visually pleasing results. Our results suggest that contour closure can be effectively achieved in contour domain, in contrast to a popular view that segmentation is essential for this purpose. PMID:27168599

  9. Detection of elliptical contours

    International Nuclear Information System (INIS)

    This dissertation describes the quantitation of myocardial perfusion defects in planar thallium-201 scintigrams. To be able to quantify the distribution of 201Tl in the myocardium as imaged by the scintigram, accurate delineation of the target object is a prerequisite. The distribution of the radionuclide within the contour of the left ventricle can be described by application of circumferential profiles. By comparing the computed circumferential profile with those of normal subjects, humans with no evidence of coronary artery disease, segments of the left ventricle with decreased bloodflow can be detected. In practice there is no real standard to compare with, and due to noise and biological variations, it is not always possible to make a definite decision regarding the presence of a defect in the distribution of the radionuclide. The value and limitations of the developed quantification procedure are discussed. Some future developments are suggested. 108 refs.; 57 figs.; 5 tabs

  10. Body hair transplant: An additional source of donor hair in hair restoration surgery

    OpenAIRE

    Poswal Arvind

    2007-01-01

    Androgenic alopecia (pattern baldness) is a condition in which there is androgen mediated progressive miniaturization and loss of hair follicles in a genetically susceptible individual. A 47-year-old male patient with advanced degree of hair loss (Norwood 6 category) wanted to go for full hair restoration surgery. Due to the limited availability of donor hair in the scalp, a small session with 700-chest hair was performed. On follow-up at eight months it was observed that chest hair grew and ...

  11. Body hair transplant: An additional source of donor hair in hair restoration surgery

    Directory of Open Access Journals (Sweden)

    Poswal Arvind

    2007-01-01

    Full Text Available Androgenic alopecia (pattern baldness is a condition in which there is androgen mediated progressive miniaturization and loss of hair follicles in a genetically susceptible individual. A 47-year-old male patient with advanced degree of hair loss (Norwood 6 category wanted to go for full hair restoration surgery. Due to the limited availability of donor hair in the scalp, a small session with 700-chest hair was performed. On follow-up at eight months it was observed that chest hair grew and formed a cosmetically acceptable forelock.

  12. Body Image

    Science.gov (United States)

    ... Help your child have a healthy body image Cosmetic surgery Breast surgery Botox Liposuction Varicose or spider veins Body dysmorphic disorder (BDD) Eating disorders Anorexia nervosa Binge eating ... nervosa Cosmetics and your health Depression during and after pregnancy ...

  13. Deformable registration for image-guided spine surgery: preserving rigid body vertebral morphology in free-form transformations

    Science.gov (United States)

    Reaungamornrat, S.; Wang, A. S.; Uneri, A.; Otake, Y.; Zhao, Z.; Khanna, A. J.; Siewerdsen, J. H.

    2014-03-01

    Purpose: Deformable registration of preoperative and intraoperative images facilitates accurate localization of target and critical anatomy in image-guided spine surgery. However, conventional deformable registration fails to preserve the morphology of rigid bone anatomy and can impart distortions that confound high-precision intervention. We propose a constrained registration method that preserves rigid morphology while allowing deformation of surrounding soft tissues. Method: The registration method aligns preoperative 3D CT to intraoperative cone-beam CT (CBCT) using free-form deformation (FFD) with penalties on rigid body motion imposed according to a simple intensity threshold. The penalties enforced 3 properties of a rigid transformation - namely, constraints on affinity (AC), orthogonality (OC), and properness (PC). The method also incorporated an injectivity constraint (IC) to preserve topology. Physical experiments (involving phantoms, an ovine spine, and a human cadaver) as well as digital simulations were performed to evaluate the sensitivity to registration parameters, preservation of rigid body morphology, and overall registration accuracy of constrained FFD in comparison to conventional unconstrained FFD (denoted uFFD) and Demons registration. Result: FFD with orthogonality and injectivity constraints (denoted FFD+OC+IC) demonstrated improved performance compared to uFFD and Demons. Affinity and properness constraints offered little or no additional improvement. The FFD+OC+IC method preserved rigid body morphology at near-ideal values of zero dilatation (D = 0.05, compared to 0.39 and 0.56 for uFFD and Demons, respectively) and shear (S = 0.08, compared to 0.36 and 0.44 for uFFD and Demons, respectively). Target registration error (TRE) was similarly improved for FFD+OC+IC (0.7 mm), compared to 1.4 and 1.8 mm for uFFD and Demons. Results were validated in human cadaver studies using CT and CBCT images, with FFD+OC+IC providing excellent preservation

  14. Investigation of Peri-implant Status and Risk Variables for Implant Failure in Body of Maxilla after Oral Tumor Surgery

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The aim of this study was to assess the peri-implant parameters and evaluate the clinical status with the survival of dental implants in body of maxilla after treatments of oral tumor. A follow-up examination included 27 patients who underwent the ablative tumor and (or) reconstructive surgery during a 5-year period. The follow-up protocol included clinical examination, radiological evaluation, and an interview using a standardized questionnaire. The reasons related to implant failure were studied by comparing the amount of failure with the value of marginal bone resorption, probing pocket depth, and plaque index using statistical t-test. The relationship between smoking and implant failure was analyzed statistically by chi-square test. The results showed among the 112 implants observed after implant loading, 29 have failed with the failure rate being 22.14 %. There was no significant correlation between the peri-implant status and the implant failure (P>0.05), however, the association of smoking and implant failure was statistically tested (P<0.05). It was suggested that the association of peri-implant status and implant failure in the maxilla after tumor surgery can't be statistically tested, however smoking was still a mainly significant factor.

  15. Beauty is in the eye of the beholder: body dysmorphic disorder in ophthalmic plastic and reconstructive surgery.

    Science.gov (United States)

    McConnell, Lindsay K; Lee, Wendy W; Black, Donald W; Shriver, Erin M

    2015-01-01

    Despite the fact that up to 15% of patients in an aesthetic surgery practice have body dysmorphic disorder (BDD), little has been written about the condition in the oculoplastic literature. The authors describe 3 patients with suspected BDD who presented with perceived periocular defects. To appear "Asian," a 39-year-old Hispanic woman underwent over 30 surgeries. She developed disfiguring scars and lagophthalmos with corneal scarring, remained unsatisfied, and tragically committed suicide. A 52-year-old woman with moderate dermatochalasis underwent a blepharoplasty to improve her vision and appearance and help her gain employment. Despite a good outcome, she remained dissatisfied and blamed the surgeon for her unemployment. Finally, a 73-year-old woman presented demanding treatment for brow rhytids causing severe emotional distress. She was denied intervention due to unrealistic expectations. These patients are suspected to be suffering from BDD. Increased awareness is critical as BDD patients often remain unsatisfied after surgical intervention and are in need of psychiatric care. PMID:24833442

  16. Contours - MO 2012 Greene County NE 1ft Contours (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — 1ft contour file for the northeast portion of Greene County, Missouri. This file was created using the USGS corrected elevation data from the 2011 LiDAR flight. It...

  17. Contours - MO 2012 Greene County SE 1ft Contours (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — 1ft contour file for the southeast portion of Greene County, Missouri. This file was created using the USGS corrected elevation data from the 2011 LiDAR flight. It...

  18. Contours - MO 2012 Greene County NW 1ft Contours (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — 1ft contour file for the northwest portion of Greene County, Missouri. This file was created using the USGS corrected elevation data from the 2011 LiDAR flight. It...

  19. Contours - MO 2012 Greene County SW 1ft Contours (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — 1ft contour file for the southwest portion of Greene County, Missouri. This file was created using the USGS corrected elevation data from the 2011 LiDAR flight. It...

  20. Contours - MO 2012 Greene County 5ft Contours (SHP)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — 5ft cartographic contour file for Greene County, Missouri. This file was created using the elevation data from the 2011 LiDAR flight. It includes indexes for 10,...

  1. Contours--Offshore Aptos, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Aptos map area, California. The vector data file is...

  2. Visualizing Contour Trees within Histograms

    DEFF Research Database (Denmark)

    Kraus, Martin

    2010-01-01

    Many of the topological features of the isosurfaces of a scalar volume field can be compactly represented by its contour tree. Unfortunately, the contour trees of most real-world volume data sets are too complex to be visualized by dot-and-line diagrams. Therefore, we propose a new visualization...... that is suitable for large contour trees and efficiently conveys the topological structure of the most important isosurface components. This visualization is integrated into a histogram of the volume data; thus, it offers strictly more information than a traditional histogram. We present algorithms...... to automatically compute the graph layout and to calculate appropriate approximations of the contour tree and the surface area of the relevant isosurface components. The benefits of this new visualization are demonstrated with the help of several publicly available volume data sets....

  3. Contours--Offshore Monterey, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents bathymetric contours for several seafloor maps of the Monterey Canyon and Vicinity map area, California. The raster data file is...

  4. Multivariate elliptically contoured autoregressive process

    OpenAIRE

    Taras Bodnar; Arjun K. Gupta

    2014-01-01

    In this paper, we introduce a new class of elliptically contoured processes. The suggested process possesses both the generality of the conditional heteroscedastic autoregressive process and the elliptical symmetry of the elliptically contoured distributions. In the empirical study we find the link between the conditional time varying behavior of the covariance matrix of the returns and the time variability of the investor’s coefficient of risk aversion. Moreover, it is shown that the non-dia...

  5. Book review: media and the rhetoric of body perfection: cosmetic surgery, weight loss and beauty in popular culture by Deborah Harris-Moore

    OpenAIRE

    Monson, Olivia

    2014-01-01

    Against the background of the so-called ‘obesity epidemic’, Media and the Rhetoric of Body Perfection critically examines the discourses of physical perfection that pervade Western societies, aiming to shed new light on the rhetorical forces behind body anxieties and extreme methods of weight loss and beautification. Drawing on interview material with cosmetic surgery patients and offering fresh analyses of various texts from popular culture, this book examines the ways in which the media cap...

  6. Impact of Body Mass Index on In-Hospital Mortality and Morbidity after Coronary Artery Bypass Grafting Surgery

    Directory of Open Access Journals (Sweden)

    Mohammad Hasan Ghaffari Nejad

    2008-07-01

    Full Text Available Background: Obesity is a common risk factor for morbidity and mortality after cardiac surgery. However, the relationship between obesity and postoperative risk has not been fully defined. Methods: A prospective study of 1015 consecutive patients undergoing isolated coronary artery bypass grafting (CABG was carried out. Body mass index (BMI was used as the measure of obesity and was categorized as normal weight (BMI=20-25 and obese (BMI>25 and<35. The preoperative, operative, and postoperative risk factors as well as the complication and in-hospital death rates were compared between the two groups. Results: Of the 1015 patients, 40% had a normal weight and 49% were obese. Compared with the normal-weight group, the obese group had a significantly higher incidence of diabetes mellitus (P=0.007 and lower arterial partial pressure of oxygen (PaO2 (P=0.03. The normal-weight patients had a higher New York Heart Association (NYHA Functional Class (P=0.03 and were at a higher risk for emergent surgery (P=0.003 or reoperation (P=0.002. Among the postoperative complications, respiratory complications (P=0.027 were more frequent in the obese patients. The duration of mechanical ventilation (P=0.001, the incidence of arrhythmia (P=0.011, low cardiac output syndrome (P=0.001, reintubation (P=0.001, and neurological complications (P=0.003 were significantly higher in the normal-weight patients. Obesity was associated with a lower risk of reoperation for bleeding (P=0.032. There were no significant differences in infective complications, length of intensive care unit (ICU stay, total length of stay in hospital, and operative mortality between the groups. Conclusion: In the patients undergoing isolated CABG procedures, obesity did not increase the risk of operative mortality and morbidity with the exception of respiratory complications. The normal body weight patients were at a higher risk for complications than were the obese patients. Therefore, obese patients

  7. Development of a contour meter

    International Nuclear Information System (INIS)

    The dosimetric calculation in patients that receive radiotherapy treatment it requires the one knowledge of the geometry of some anatomical portions, which differs from a patient to another. Making reference to the specific case of mammary neoplasia, one of the measurements that is carried out on the patient is the acquisition of the contour of the breast, which is determined from a point marked on the breastbone until another point marked on the lateral of the thorax, below the armpit, with the patient located in the irradiation position. This measurement is carried out with the help of a mechanical contour meter that is a device conformed by a series of wires with a polymeric coating, which support on the breast of the patient and it reproduces its form. Then it is transported in the more careful possible form on a paper and the contour is traced with a tracer one. The geometric error associated to this procedure is of ±1 cm, which is sensitive of being reduced. The present work finds its motivation in the patient's radiological protection radiotherapy. The maximum error in dose allowed in radiotherapeutic treatments is 5%. It would be increase the precision and with it to optimize the treatment received by the patient, reducing the error in the acquisition process of the mammary contour. With this objective, a digital device is designed whose operation is based in the application of a spatial transformation on a picture of the mammary contour, which corrects the geometric distortion introduced in the process of the photographic acquisition. An algorithm that allows to obtain a front image (without distortion) of the plane of the contour was developed. A software tool especially developed carries out the processing of the digital images. The maximum geometric error detected in the validation process is 2 mm located on a small portion of the contour. (Author)

  8. "Oriental anthropometry" in plastic surgery

    Directory of Open Access Journals (Sweden)

    Senna-Fernandes Vasco

    2008-01-01

    Full Text Available Background : According to Chinese medicine, the acupuncture-points′ (acupoints locations are proportionally and symmetrically distributed in well-defined compartment zones on the human body surface Oriental Anthropometry" (OA. Acupoints, if considered as aesthetic-loci, might be useful as reference guides in plastic surgery (PS. Aim: This study aimed to use aesthetic-loci as anatomical reference in surgical marking of Aesthetic Plastic Surgery. Method: This was an observational study based on aesthetic surgeries performed in private clinic. This study was based on 106 cases, comprising of 102 women and 4 men, with ages varying from 07 to 73 years, and with heights of between 1.34 m and 1.80 m. Patients were submitted to aesthetic surgical planning by relating aesthetic-loci to conventional surgical marking, including breast surgeries, abdominoplasty, rhytidoplasty, blepharoplasty, and hair implant. The aesthetic-surgical-outcome (ASO of the patients was assessed by a team of plastic surgeons (who were not involved in the surgical procedures over a follow-up period of one year by using a numeric-rating-scale in percentage (% terms. A four-point-verbal-rating-scale was used to record the patients′ opinion of therapeutic-satisfaction (TS. Results: ASO was 75.3 ± 9.4% and TS indicated that most patients (58.5% obtained "good" results. Of the remainder, 38.7% found the results "excellent", and 2.8% found them "fair". Discussion and Conclusion : The data suggested that the use of aesthetic-loci may be a useful tool for PS as an anatomical reference for surgical marking. However, further investigation is required to assess the efficacy of the OA by providing the patients more reliable balance and harmony in facial and body contours surgeries.

  9. [Influence of the social context on the body image perception of women undergoing breast cancer surgery].

    Science.gov (United States)

    Aguilar Cordero, M J; Neri Sánchez, M; Mur Villar, N; Gómez Valverde, E

    2013-01-01

    El pecho de la mujer está muy relacionado en la cultura occidental con el mundo de la sexualidad y el atractivo físico, aunque puede variar en función del contexto. Objetivo: Determinar la influencia del contexto social en la percepción de la imagen corporal de las mujeres intervenidas de cáncer de mama. Material y método: Se llevó a cabo un estudio observacional, descriptivo y transversal. Los escenarios del estudio estuvieron constituidos por el Centro Oncológico Estatal del ISSEMyM en la ciudad de Toluca (México), y el Hospital Clínico San Cecilio de la ciudad de Granada (España). La totalidad del universo estuvo formado por 72 mujeres mastectomizadas. De ellas, 30 correspondieron a México y 42 a España. Se recogieron datos de variables sociodemográficas y las mujeres respondieron a preguntas sobre su historia clínica personal y familiar. Se aplicó la Escala validada BIS (Body Image Scale) de Hopwood. Resultados: El 67,7% mujeres mastectomizadas españolas se encuentran activas laboralmente en comparación al 43,3% de las mujeres mexicanas. Diferencia estadísticamente significativas en los dos grupos (p < 0,05). En la medida en que las mujeres se vinculan al mundo laboral e incrementan su nivel de escolaridad, la aceptación de la imagen corporal muestra mejores resultados. Las mujeres que viven en contextos sociales desarrollados tienen una mejor percepción de su imagen corporal. Con una diferencia significativa de (p < 0,05). Conclusiones: El contexto social influye en la percepción de la imagen corporal de las mujeres intervenidas de cáncer de mama. La ocupación laboral y el grado de escolaridad fueron determinantes de la percepción de la misma.

  10. Penetrating thoracic injury with retained foreign body: can video-assisted thoracic surgery take up the leading role in acute management?

    Science.gov (United States)

    Yu, Peter S Y; Chan, Herman H M; Lau, Rainbow W H; Capili, Freddie G; Underwood, Malcolm J; Wan, Innes Y P

    2016-08-01

    Video-assisted thoracic surgery (VATS) is widely adopted in acute management of patient with thoracic trauma, but its use in penetrating thoracic injuries with retained foreign bodies were rarely reported. We described three of such cases using VATS as the first line approach. Identification of injuries, control of bleeders, clot evacuation, resection of damaged lung parenchyma and safe retrieval of foreign bodies were all performed via complete VATS within short operative time. Patient were uneventfully discharged during early post-operative period. We suggest that, for haemodynamically stable patients, VATS offers a safe and minimally-invasive alternative to conventional thoracotomy for penetrating thoracic injury with retained foreign bodies.

  11. Cosmetic Facial Surgery

    OpenAIRE

    Adamson, Peter A.

    1987-01-01

    Canadians have committed themselves to a healthier lifestyle, and many are seeking to look as well as they feel. For patients with realistic expectations, modern techniques of cosmetic facial surgery can enhance appearance and be of psychological benefit. Today most procedures can be done under local anesthesia on an out-patient basis. Facial contour defects can be improved by means of procedures such as rhinoplasty, mentoplasty, otoplasty and malarplasty. Facial rejuvenation surgery to decre...

  12. Multivariate elliptically contoured autoregressive process

    Directory of Open Access Journals (Sweden)

    Taras Bodnar

    2014-05-01

    Full Text Available In this paper, we introduce a new class of elliptically contoured processes. The suggested process possesses both the generality of the conditional heteroscedastic autoregressive process and the elliptical symmetry of the elliptically contoured distributions. In the empirical study we find the link between the conditional time varying behavior of the covariance matrix of the returns and the time variability of the investor’s coefficient of risk aversion. Moreover, it is shown that the non-diagonal elements of the dispersion matrix are slowly varying in time.

  13. Topological Cacti: Visualizing Contour-based Statistics

    Energy Technology Data Exchange (ETDEWEB)

    Weber, Gunther H.; Bremer, Peer-Timo; Pascucci, Valerio

    2011-05-26

    Contours, the connected components of level sets, play an important role in understanding the global structure of a scalar field. In particular their nestingbehavior and topology-often represented in form of a contour tree-have been used extensively for visualization and analysis. However, traditional contour trees onlyencode structural properties like number of contours or the nesting of contours, but little quantitative information such as volume or other statistics. Here we use thesegmentation implied by a contour tree to compute a large number of per-contour (interval) based statistics of both the function defining the contour tree as well asother co-located functions. We introduce a new visual metaphor for contour trees, called topological cacti, that extends the traditional toporrery display of acontour tree to display additional quantitative information as width of the cactus trunk and length of its spikes. We apply the new technique to scalar fields ofvarying dimension and different measures to demonstrate the effectiveness of the approach.

  14. Towards Stabilizing Parametric Active Contours

    DEFF Research Database (Denmark)

    Liu, Jinchao; Fan, Zhun; Olsen, Søren Ingvor;

    2014-01-01

    Numerical instability often occurs in evolving of parametric active contours. This is mainly due to the undesired change of parametrization during evolution. In this paper, we propose a new tangential diffusion term to compensate this undesired change. As a result, the parametrization will conver...

  15. Illusory contour formation survives crowding.

    Science.gov (United States)

    Lau, Jonathan Siu Fung; Cheung, Sing-Hang

    2012-06-12

    Flanked objects are difficult to identify using peripheral vision due to visual crowding, which limits conscious access to target identity. Nonetheless, certain types of visual information have been shown to survive crowding. Such resilience to crowding provides valuable information about the underlying neural mechanism of crowding. Here we ask whether illusory contour formation survives crowding of the inducers. We manipulated the presence of illusory contours through the (mis)alignment of the four inducers of a Kanizsa square. In the inducer-aligned condition, the observers judged the perceived shape (thin vs. fat) of the illusory Kanizsa square, manipulated by small rotations of the inducers. In the inducer-misaligned condition, three of the four inducers (all except the upper-left) were rotated 90°. The observers judged the orientation of the upper-left inducer. Crowding of the inducers worsened observers' performance significantly only in the inducer-misaligned condition. Our findings suggest that information for illusory contour formation survives crowding of the inducers. Crowding happens at a stage where the low-level featural information is integrated for inducer orientation discrimination, but not at a stage where the same information is used for illusory contour formation.

  16. MULTISCALE DISCRETIZATION OF SHAPE CONTOURS

    Energy Technology Data Exchange (ETDEWEB)

    Prasad, L.; Rao, R.

    2000-09-01

    We present an efficient multi-scale scheme to adaptively approximate the continuous (or densely sampled) contour of a planar shape at varying resolutions. The notion of shape is intimately related to the notion of contour, and the efficient representation of the contour of a shape is vital to a computational understanding of the shape. Any polygonal approximation of a planar smooth curve is equivalent to a piecewise constant approximation of the parameterized X and Y coordinate functions of a discrete point set obtained by densely sampling the curve. Using the Haar wavelet transform for the piecewise approximation yields a hierarchical scheme in which the size of the approximating point set is traded off against the morphological accuracy of the approximation. Our algorithm compresses the representation of the initial shape contour to a sparse sequence of points in the plane defining the vertices of the shape's polygonal approximation. Furthermore, it is possible to control the overall resolution of the approximation by a single, scale-independent parameter.

  17. Motion estimation of elastic articulated objects from image contours

    Institute of Scientific and Technical Information of China (English)

    PAN Hai-lang; DAI Yue-wei; SHI Lei

    2008-01-01

    A new method of elastic articulated objects (human bodies) modeling was presented based on a new conic curve. The model includes 3D object deform able curves which can represent the deformation of human occluding contours. The deformation of human occluding contour can be represented by adjusting only four de-formation parameters for each limb. Then, the 3D deformation parameters are determined by corresponding 2Dcontours from a sequence of stereo images. The algorithm presented in this paper includes deform able conic curve parameters determination and the plane, 3D conic curve lying on, parameter determination.

  18. 高密度多孔聚乙烯假体置入隆颏在面下1/3轮廓成形术中的应用%Application of high-density porous polyethylene implant in chin augmentation in contour plastic surgery of low face

    Institute of Scientific and Technical Information of China (English)

    马静; 吕长胜; 牛峰; 唐晓军; 俞冰; 刘剑峰; 归来

    2010-01-01

    目的 探讨高密度多孔聚乙烯(porous high-density polyethylene,Medpor)假体置入隆颏在面下1/3轮廓成形术中的应用效果.方法 149例同时行口内入路Medpor假体置入隆颏及面下1/3轮廓整形,其中行双侧下颌角截骨成形术121例,行双侧下颌角截骨成形术及双侧颧骨截骨降低术28例,并进行术前术后照相对比,观察判断临床效果.结果 术后145例(97.3%)颏部外形及面下1/3轮廓改善满意.2例(1.3%)感觉颏部突度改善欠佳,其中1例再次行Medpor假体取出及颏部截骨前移颏成形术.1例(0.7%)感觉颏部假体偏大,行二次手术将假体修小;1例(0.7%)术后6个月因假体偏斜改行颏部截骨颏成形术.20例(13.4%)术后短期感觉下唇麻木,1~3个月后基本消失.随访期间没有发现伤口血肿、感染及假体外露、断裂等并发症.结论 Medpor假体组织相容性好,同时经口内入路置入隆颏及下颌角截骨成形术在面下1/3轮廓整形中效果良好.%Objective High-density porous polyethylene(Medpor)has been widely used in chin augmentation in recent years.The study aimed to observe the outcomes of clinical use of high-density porous polyethylene implant in chin augmentation in contour plastic surgery of low face.Methods From 2005 to 2008,149 cases of chin augmentations intraorally with Medpor implants combined with were collected.121 of them received bilateral mandibular angle osteotomy and 28 cases received bilateral mandibular angle osteotomy and bilateral malar reduction simultaneously.They wre all females aged from 17 to 46 years.The patients were followed up for 6 to 36 months(average 24 months)and photographs were taken before and after operations.Clinical outcomes were observed and analysed.Resuits 145 patients(97.3%)were satisfied with their chin and contour of low face.2 patients (1.3%)were not satisfied with the projection of their chin,and 1 of them were admitted to take out the implant and received sliding

  19. Foreign body granulomas in the left main bronchus resulting from the sutures for esophageal cancer surgery: the report of two cases

    Institute of Scientific and Technical Information of China (English)

    JIAO Yang; SHANG Yan; LI Qiang; WANG Yang; WU Ning; WANG Qin; WANG Xiang-qi; XIA Ying

    2012-01-01

    In this report,we present two cases of bronchial foreign body granulomas caused by the suture ties used in bronchial surgery for esophageal cancer.Both of them was hospitalized as “tumor transfer or an invasion”,but pathological examination of the neoplasms indicated an inflammatory granuloma showing reaction to the foreign body,These two cases give us an attention that the neoplasms in tracheal or bronchial was not only the invasion or transfer of the primary tumor,but also the possibility of grenuloma development due to the surgical sutures.

  20. Human bones obtained from routine joint replacement surgery as a tool for studies of plutonium, americium and {sup 90}Sr body-burden in general public

    Energy Technology Data Exchange (ETDEWEB)

    Mietelski, Jerzy W., E-mail: jerzy.mietelski@ifj.edu.pl [Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Cracow (Poland); Golec, Edward B. [Traumatology and Orthopaedic Clinic, 5th Military Clinical Hospital and Polyclinic, Independent Public Healthcare Facility, Wroclawska 1-3, 30-901 Cracow (Poland); Orthopaedic Rehabilitation Department, Chair of Clinical Rehabilitation, Faculty of Motor of the Bronislaw Czech' s Academy of Physical Education, Cracow (Poland); Department of Physical Therapy Basics, Faculty of Physical Therapy, Administration College, Bielsko-Biala (Poland); Tomankiewicz, Ewa [Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Cracow (Poland); Golec, Joanna [Orthopaedic Rehabilitation Department, Chair of Clinical Rehabilitation, Faculty of Motor of the Bronislaw Czech' s Academy of Physical Education, Cracow (Poland); Physical Therapy Department, Institute of Physical Therapy, Faculty of Heath Science, Jagiellonian University, Medical College, Cracow (Poland); Nowak, Sebastian [Traumatology and Orthopaedic Clinic, 5th Military Clinical Hospital and Polyclinic, Independent Public Healthcare Facility, Wroclawska 1-3, 30-901 Cracow (Poland); Orthopaedic Rehabilitation Department, Chair of Clinical Rehabilitation, Faculty of Motor of the Bronislaw Czech' s Academy of Physical Education, Cracow (Poland); Szczygiel, Elzbieta [Physical Therapy Department, Institute of Physical Therapy, Faculty of Heath Science, Jagiellonian University, Medical College, Cracow (Poland); Brudecki, Kamil [Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Cracow (Poland)

    2011-06-15

    The paper presents a new sampling method for studying in-body radioactive contamination by bone-seeking radionuclides such as {sup 90}Sr, {sup 239+240}Pu, {sup 238}Pu, {sup 241}Am and selected gamma-emitters, in human bones. The presented results were obtained for samples retrieved from routine surgeries, namely knee or hip joints replacements with implants, performed on individuals from Southern Poland. This allowed to collect representative sets of general public samples. The applied analytical radiochemical procedure for bone matrix is described in details. Due to low concentrations of {sup 238}Pu the ratio of Pu isotopes which might be used for Pu source identification is obtained only as upper limits other then global fallout (for example Chernobyl) origin of Pu. Calculated concentrations of radioisotopes are comparable to the existing data from post-mortem studies on human bones retrieved from autopsy or exhumations. Human bones removed during knee or hip joint surgery provide a simple and ethical way for obtaining samples for plutonium, americium and {sup 90}Sr in-body contamination studies in general public. - Highlights: > Surgery for joint replacement as novel sampling method for studying in-body radioactive contamination. > Proposed way of sampling is not causing ethic doubts. > It is a convenient way of collecting human bone samples from global population. > The applied analytical radiochemical procedure for bone matrix is described in details. > The opposite patient age correlations trends were found for 90Sr (negative) and Pu, Am (positive).

  1. Human bones obtained from routine joint replacement surgery as a tool for studies of plutonium, americium and 90Sr body-burden in general public

    International Nuclear Information System (INIS)

    The paper presents a new sampling method for studying in-body radioactive contamination by bone-seeking radionuclides such as 90Sr, 239+240Pu, 238Pu, 241Am and selected gamma-emitters, in human bones. The presented results were obtained for samples retrieved from routine surgeries, namely knee or hip joints replacements with implants, performed on individuals from Southern Poland. This allowed to collect representative sets of general public samples. The applied analytical radiochemical procedure for bone matrix is described in details. Due to low concentrations of 238Pu the ratio of Pu isotopes which might be used for Pu source identification is obtained only as upper limits other then global fallout (for example Chernobyl) origin of Pu. Calculated concentrations of radioisotopes are comparable to the existing data from post-mortem studies on human bones retrieved from autopsy or exhumations. Human bones removed during knee or hip joint surgery provide a simple and ethical way for obtaining samples for plutonium, americium and 90Sr in-body contamination studies in general public. - Highlights: → Surgery for joint replacement as novel sampling method for studying in-body radioactive contamination. → Proposed way of sampling is not causing ethic doubts. → It is a convenient way of collecting human bone samples from global population. → The applied analytical radiochemical procedure for bone matrix is described in details. → The opposite patient age correlations trends were found for 90Sr (negative) and Pu, Am (positive).

  2. Stereotactic Body Radiotherapy Versus Surgery for Medically Operable Stage I Non–Small-Cell Lung Cancer: A Markov Model–Based Decision Analysis

    International Nuclear Information System (INIS)

    Purpose: To compare the quality-adjusted life expectancy and overall survival in patients with Stage I non–small-cell lung cancer (NSCLC) treated with either stereotactic body radiation therapy (SBRT) or surgery. Methods and Materials: We constructed a Markov model to describe health states after either SBRT or lobectomy for Stage I NSCLC for a 5-year time frame. We report various treatment strategy survival outcomes stratified by age, sex, and pack-year history of smoking, and compared these with an external outcome prediction tool (Adjuvant! Online). Results: Overall survival, cancer-specific survival, and other causes of death as predicted by our model correlated closely with those predicted by the external prediction tool. Overall survival at 5 years as predicted by baseline analysis of our model is in favor of surgery, with a benefit ranging from 2.2% to 3.0% for all cohorts. Mean quality-adjusted life expectancy ranged from 3.28 to 3.78 years after surgery and from 3.35 to 3.87 years for SBRT. The utility threshold for preferring SBRT over surgery was 0.90. Outcomes were sensitive to quality of life, the proportion of local and regional recurrences treated with standard vs. palliative treatments, and the surgery- and SBRT-related mortalities. Conclusions: The role of SBRT in the medically operable patient is yet to be defined. Our model indicates that SBRT may offer comparable overall survival and quality-adjusted life expectancy as compared with surgical resection. Well-powered prospective studies comparing surgery vs. SBRT in early-stage lung cancer are warranted to further investigate the relative survival, quality of life, and cost characteristics of both treatment paradigms.

  3. Splines, contours and SVD subroutines

    International Nuclear Information System (INIS)

    Portability of Fortran code is a major concern these days, since hardware and commercial software change faster than the codes themselves. Hence, using public domain, portable, mathematical subroutines is imperative. Here we present a collection of subroutines we have used in the past, and found to be particularly useful. They are: 2-dimensional splines, contour tracing of flux surface (based on 2-D spline), and singular Value Matrix Decomposition (for Chi-square minimization)

  4. Intonation contour in synchronous speech

    Science.gov (United States)

    Wang, Bei; Cummins, Fred

    2003-10-01

    Synchronous Speech (Syn-S), obtained by having pairs of speakers read a prepared text together, has been shown to result in interesting properties in the temporal domain, especially in the reduction of inter-speaker variability in supersegmental timing [F. Cummins, ARLO 3, 7-11 (2002)]. Here we investigate the effect of synchronization among speakers on the intonation contour, with a view to informing models of intonation. Six pairs of speakers (all females) read a short text (176 words) both synchronously and solo. Results show that (1) the pitch accent height above a declining baseline is reduced in Syn-S, compared with solo speech, while the pitch accent location is consistent across speakers in both conditions; (2) in contrast to previous findings on duration matching, there is an asymmetry between speakers, with one speaker exerting a stronger influence on the observed intonation contour than the other; (3) agreement on the boundaries of intonational phrases is greater in Syn-S and intonation contours are well matched from the first syllable of the phrase and throughout.

  5. Grouping by proximity in haptic contour detection.

    Directory of Open Access Journals (Sweden)

    Krista E Overvliet

    Full Text Available We investigated the applicability of the Gestalt principle of perceptual grouping by proximity in the haptic modality. To do so, we investigated the influence of element proximity on haptic contour detection. In the course of four sessions ten participants performed a haptic contour detection task in which they freely explored a haptic random dot display that contained a contour in 50% of the trials. A contour was defined by a higher density of elements (raised dots, relative to the background surface. Proximity of the contour elements as well as the average proximity of background elements was systematically varied. We hypothesized that if proximity of contour elements influences haptic contour detection, detection will be more likely when contour elements are in closer proximity. This should be irrespective of the ratio with the proximity of the background elements. Results showed indeed that the closer the contour elements were, the higher the detection rates. Moreover, this was the case independent of the contour/background ratio. We conclude that the Gestalt law of proximity applies to haptic contour detection.

  6. Active Contour with A Tangential Component

    CERN Document Server

    Wang, Junyan

    2012-01-01

    Conventional edge-based active contours often require the normal component of an edge indicator function on the optimal contours to approximate zero, while the tangential component can still be significant. In real images, the full gradients of the edge indicator function along the object boundaries are often small. Hence, the curve evolution of edge-based active contours can terminate early before converging to the object boundaries with a careless contour initialization. We propose a novel Geodesic Snakes (GeoSnakes) active contour that requires the full gradients of the edge indicator to vanish at the optimal solution. Besides, the conventional curve evolution approach for minimizing active contour energy cannot fully solve the Euler-Lagrange (EL) equation of our GeoSnakes active contour, causing a Pseudo Stationary Phenomenon (PSP). To address the PSP problem, we propose an auxiliary curve evolution equation, named the equilibrium flow (EF) equation. Based on the EF and the conventional curve evolution, w...

  7. Full body photography in the massive weight loss population: an inquiry to optimize patient-centered care.

    Science.gov (United States)

    Wasicek, Philip; Kaswan, Sumesh; Messing, Susan; Gusenoff, Jeffrey A

    2013-11-01

    Medical photography of body contouring patients often requires complete nudity, placing patients in a vulnerable situation. We investigated patient perspectives on full body photography in an effort to better protect the patients and enhance comfort with the photography process. Sixty-five massive weight loss patients were identified who underwent body contouring surgery with full body photography. Photographs were taken at the time of initial consult, time of marking, and postoperatively. A retrospective chart review was performed to assess body mass indices and comorbidities, and a telephone survey inquired about several aspects of the photographic process. Fifty-six (86%) patients participated. Patients were more comfortable at the time of markings (P = 0.0004) and at the postoperative session (P = 0.0009). Patients' perception of positive body image increased after body contouring surgery (P photography improves quickly as they move through the surgical process. Maintaining professionalism is the most important factor in achieving patient trust and comfort. Limiting the number of observers in the room, providing explicit details of the photography process, and having at least 1 person of the same sex in the room can optimize patient safety and comfort.

  8. An Obesity Paradox of Asian Body Mass Index after Cardiac Surgery: Arterial Oxygenations in Duration of Mechanic Ventilation

    Directory of Open Access Journals (Sweden)

    Chiu-Hsia Chang

    2013-01-01

    Full Text Available Background. Numerous studies have documented an obesity paradox that overweight of Caucasian patients has better prognosis after cardiac surgery. This study is to examine Asian patients’ BMI to see whether an obesity paradox exists in DMV after cardiac surgery. Methods. A retrospective study consisted of 428 patients after cardiac surgery from January 2006 to December 2010 in the medical center of Taiwan. The Asian BMI was divided into 3 groups: under-normal weight patients (; , overweight patients (BMI 24 to <27; , and obese patients (; . Multivariable analysis and paired were used to compare all variables. Results. Overweight patients were significantly associated with the shortest DMV. Under-normal weight patients had significantly better oxygenations of AaDO2 and P/F ratio in the DMV; however, they correlated with the longest DMV, older age, more female, lower LVSV, higher BUN, more dialysis-dependent, and poorer outcomes, namely, 1-year mortality, HAP, reintubation, tracheotomy, and LOS. Conclusions. Asian overweight patients after cardiac surgery have better prognosis. Under-normal weight patients have higher risk factors, longer DMV, and poorer outcomes; even though they have better arterial oxygenations, they seem to need better arterial oxygenations for successful weaning ventilator.

  9. Brightness Alteration with Interweaving Contours

    Directory of Open Access Journals (Sweden)

    Sergio Roncato

    2012-12-01

    Full Text Available Chromatic induction is observed whenever the perceived colour of a target surface shifts towards the hue of a neighbouring surface. Some vivid manifestations may be seen in a white background where thin coloured lines have been drawn (assimilation or when lines of different colours are collinear (neon effect or adjacent (watercolour to each other. This study examines a particular colour induction that manifests in concomitance with an opposite effect of colour saturation (or anti-spread. The two phenomena can be observed when a repetitive pattern is drawn in which outline thin contours intercept wider contours or surfaces, colour spreading appear to fill the surface occupied by surfaces or thick lines whereas the background traversed by thin lines is seen as brighter or filled of a saturated white. These phenomena were first observed by Bozzi (1975 and Kanizsa (1979 in figural conditions that did not allow them to document their conjunction. Here we illustrate various manifestations of this twofold phenomenon and compare its effects with the known effects of brightness and colour induction. Some conjectures on the nature of these effects are discussed.

  10. Antenna surface contour control system

    Science.gov (United States)

    Ahl, Elvin L.; Miller, James B.

    1989-03-01

    The invention is a system for automatically controlling the surface contour of a deployable and restowable antenna having a mesh reflector surface supported by a circular, folding hoop affixed to a central, telescoping column. The antenna, when deployed, forms a quad-aperture reflector with each quadrant of the mesh surface shaped to provide an offset parabolic radio frequency (RF) reflector. The hoop is supported and positioned by quartz support cords attached to the top of a column and by lower graphite hoop control cords that extend between the hoop and base of the column. The antenna, an RF reflective surface, is a gold plated molybdenum wire mesh supported on a graphite cord truss structure that includes the hoop control cords and a plurality of surface control cords attached at selected points on the surface and to the base of the column. The contour of the three-dimensional surface of the antenna is controlled by selectively adjusting the lengths of the surface control cords and the graphite hoop control cords by means of novel actuator assemblies that automatically sense and change the lengths of the lower hoop control cords and surface control cords.

  11. Formulation of wire control mechanism for surgical robot to create virtual reality environment aimed at conducting surgery inside the body.

    Science.gov (United States)

    Suzuki, Naoki; Hattori, Asaki; Ieiri, Satoshi; Tomikawa, Morimasa; Kenmotsu, Hajime; Hashizume, Makoto

    2013-01-01

    We here report on the process of developing a surgical robot that can conduct operation "going inside the body without spreading the operational region". The endoscopic robot that we are developing now has a flexible cylindrical body with functions of a set of human arms at the tip and also with vision and haptic sense functions. We evaluated necessary technology factor to complete this robot into categories such as, transmission of energy, adaptation to insides of the body. PMID:23400196

  12. Contouring variability of human- and deformable-generated contours in radiotherapy for prostate cancer

    International Nuclear Information System (INIS)

    This study was designed to evaluate contouring variability of human-and deformable-generated contours on planning CT (PCT) and CBCT for ten patients with low-or intermediate-risk prostate cancer. For each patient in this study, five radiation oncologists contoured the prostate, bladder, and rectum, on one PCT dataset and five CBCT datasets. Consensus contours were generated using the STAPLE method in the CERR software package. Observer contours were compared to consensus contour, and contour metrics (Dice coefficient, Hausdorff distance, Contour Distance, Center-of-Mass [COM] Deviation) were calculated. In addition, the first day CBCT was registered to subsequent CBCT fractions (CBCTn: CBCT2–CBCT5) via B-spline Deformable Image Registration (DIR). Contours were transferred from CBCT1 to CBCTn via the deformation field, and contour metrics were calculated through comparison with consensus contours generated from human contour set. The average contour metrics for prostate contours on PCT and CBCT were as follows: Dice coefficient—0.892 (PCT), 0.872 (CBCT-Human), 0.824 (CBCT-Deformed); Hausdorff distance—4.75 mm (PCT), 5.22 mm (CBCT-Human), 5.94 mm (CBCT-Deformed); Contour Distance (overall contour)—1.41 mm (PCT), 1.66 mm (CBCT-Human), 2.30 mm (CBCT-Deformed); COM Deviation—2.01 mm (PCT), 2.78 mm (CBCT-Human), 3.45 mm (CBCT-Deformed). For human contours on PCT and CBCT, the difference in average Dice coefficient between PCT and CBCT (approx. 2%) and Hausdorff distance (approx. 0.5 mm) was small compared to the variation between observers for each patient (standard deviation in Dice coefficient of 5% and Hausdorff distance of 2.0 mm). However, additional contouring variation was found for the deformable-generated contours (approximately 5.0% decrease in Dice coefficient and 0.7 mm increase in Hausdorff distance relative to human-generated contours on CBCT). Though deformable contours provide a reasonable starting point for contouring

  13. Contouring variability of human- and deformable-generated contours in radiotherapy for prostate cancer

    Science.gov (United States)

    Gardner, Stephen J.; Wen, Ning; Kim, Jinkoo; Liu, Chang; Pradhan, Deepak; Aref, Ibrahim; Cattaneo, Richard, II; Vance, Sean; Movsas, Benjamin; Chetty, Indrin J.; Elshaikh, Mohamed A.

    2015-06-01

    This study was designed to evaluate contouring variability of human-and deformable-generated contours on planning CT (PCT) and CBCT for ten patients with low-or intermediate-risk prostate cancer. For each patient in this study, five radiation oncologists contoured the prostate, bladder, and rectum, on one PCT dataset and five CBCT datasets. Consensus contours were generated using the STAPLE method in the CERR software package. Observer contours were compared to consensus contour, and contour metrics (Dice coefficient, Hausdorff distance, Contour Distance, Center-of-Mass [COM] Deviation) were calculated. In addition, the first day CBCT was registered to subsequent CBCT fractions (CBCTn: CBCT2-CBCT5) via B-spline Deformable Image Registration (DIR). Contours were transferred from CBCT1 to CBCTn via the deformation field, and contour metrics were calculated through comparison with consensus contours generated from human contour set. The average contour metrics for prostate contours on PCT and CBCT were as follows: Dice coefficient—0.892 (PCT), 0.872 (CBCT-Human), 0.824 (CBCT-Deformed); Hausdorff distance—4.75 mm (PCT), 5.22 mm (CBCT-Human), 5.94 mm (CBCT-Deformed); Contour Distance (overall contour)—1.41 mm (PCT), 1.66 mm (CBCT-Human), 2.30 mm (CBCT-Deformed); COM Deviation—2.01 mm (PCT), 2.78 mm (CBCT-Human), 3.45 mm (CBCT-Deformed). For human contours on PCT and CBCT, the difference in average Dice coefficient between PCT and CBCT (approx. 2%) and Hausdorff distance (approx. 0.5 mm) was small compared to the variation between observers for each patient (standard deviation in Dice coefficient of 5% and Hausdorff distance of 2.0 mm). However, additional contouring variation was found for the deformable-generated contours (approximately 5.0% decrease in Dice coefficient and 0.7 mm increase in Hausdorff distance relative to human-generated contours on CBCT). Though deformable contours provide a reasonable starting point for contouring on

  14. Robotic surgery

    Science.gov (United States)

    Robot-assisted surgery; Robotic-assisted laparoscopic surgery; Laparoscopic surgery with robotic assistance ... Robotic surgery is similar to laparoscopic surgery. It can be performed through smaller cuts than open surgery. ...

  15. Contours, Two Foot Contours, Published in 2007, Not Applicable scale, Dunn County, WI.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at Not Applicable scale, was produced all or in part from LIDAR information as of 2007. It is described as 'Two Foot Contours'....

  16. NY_GOME_CONTOURS: New York Bight and Gulf of Maine bathymetric contours

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This bathymetric shapefile contains 10 m contours for the continental shelf and 100 m beyond the 200 m shelf edge. The contours have been derived from the National...

  17. Contours of New Economic Theory

    Directory of Open Access Journals (Sweden)

    Garry Jacobs

    2015-05-01

    Full Text Available The need for a paradigm change in economic thought has been well established, but the contours and fundamental characteristics of a new paradigm in economic theory are yet to be worked out. This article views this transition as an inevitable expression of the maturation of the social sciences into an integrated trans-disciplinary science of society founded on common underlying principles, premises and processes. It calls for evolution of human-centered, value-based economic theory whose objective is to maximize human economic security, welfare and well-being rather than economic growth. It emphasizes the determinative role of fundamental creative social processes expressing in all fields of human endeavor. It argues for extending the boundaries of economics to encompass the entire gamut of political, legal, social, psychological, intellectual, organizational and ecological factors that directly and indirectly contribute to economic security, welfare and well-being. The article concludes with a list of anticipated practical implications.

  18. Development of plastic surgery

    OpenAIRE

    Pećanac Marija Đ.

    2015-01-01

    Introduction. Plastic surgery is a medical specialty dealing with corrections of defects, improvements in appearance and restoration of lost function. Ancient Times. The first recorded account of reconstructive plastic surgery was found in ancient Indian Sanskrit texts, which described reconstructive surgeries of the nose and ears. In ancient Greece and Rome, many medicine men performed simple plastic cosmetic surgeries to repair damaged parts of the body c...

  19. Contour extracting networks in early extrastriate cortex

    NARCIS (Netherlands)

    Dumoulin, Serge O.; Hess, Robert F.; May, Keith A.; Harvey, Ben M.; Rokers, Bas; Barendregt, Martijn

    2014-01-01

    Neurons in the visual cortex process a local region of visual space, but in order to adequately analyze natural images, neurons need to interact. The notion of an ''association field'' proposes that neurons interact to extract extended contours. Here, we identify the site and properties of contour i

  20. RFP for the Comet Nuclei Tour (CONTOUR)

    DEFF Research Database (Denmark)

    Jørgensen, John Leif; Madsen, Peter Buch; Betto, Maurizio;

    1999-01-01

    This document describes the ASC Star Tracker (performance, functionality, requirements etc.) to The Johns Hopkins University - Applied Physics Laboratory for their Comet Nuclei TOUR (CONTOUR) Program.......This document describes the ASC Star Tracker (performance, functionality, requirements etc.) to The Johns Hopkins University - Applied Physics Laboratory for their Comet Nuclei TOUR (CONTOUR) Program....

  1. Contour Detection Operators Based on Surround Inhibition

    NARCIS (Netherlands)

    Grigorescu, Cosmin; Petkov, Nicolai; Westenberg, Michel A.

    2003-01-01

    We propose a biologically motivated computational step, called non-classical receptive field (non-CRF) inhibition, to improve contour detection in images of natural scenes. We augment a Gabor energy operator with non-CRF inhibition. The resulting contour operator responds strongly to isolated lines,

  2. Prophylactic aortic root surgery in patients with Marfan syndrome : 10 years' experience with a protocol based on body surface area

    NARCIS (Netherlands)

    Aalberts, Jan J. J.; van Tintelen, J. Peter; Hillege, Hans L.; Boonstra, Piet W.; van den Berg, Maarten P.; Waterbolk, T

    2008-01-01

    Background: Current guidelines recommending prophylactic aortic root replacement in Marfan syndrome are based on absolute diameters of the aortic root. However, aortic root diameter is a function of body surface area (BSA). Here, we report our experience with a protocol for prophylactic aortic root

  3. An autof ocus method for capturing body contours based on visual perception%基于视觉感知的人体轮廓捕获及自动调焦

    Institute of Scientific and Technical Information of China (English)

    祝志远; 张庆辉

    2016-01-01

    In order to make the camera of the blind auxiliary perception device response quickly to the automatic fo -cus, this paper put forward an automatic focus method based on visual perception for image acquisition module in the process of target recognition to human body .Firstly the binarization processing was conducted , which can keep the characteristics of image target , greatly reducing the amount of information of the complex background .Then Ga-bor filter was used to simulate the brain's function of visual attention for mixing information extraction and feature fusion layer together through the pyramid sublayers , obtaining the feature map based on visual perception and then using boundary extension recognition to identify characteristic figure , thereby to start focusing mechanism .The ex-perimental results show that it can fast position the target of human body for all sorts of captured images .The meth-od can meet the actual need of capturing information of human body by the camera of the blind auxiliary perception device , having extensive engineering application value .%为使盲人辅助感知设备的摄像头图像采集模块在对人体目标进行识别的过程中能够快速响应自动调焦,提出了一个基于视觉感知实现自动调焦的新方法。先对图像目标进行特征保留的二值化处理,大大减少了复杂背景的信息量,再采用Gabor函数滤波器来模拟大脑视觉细胞的注意力功能,对通过金字塔化的子图层进行信息提取和特征融合,获得了基于视觉感知的特征图,再利用边界扩展法识别特征图启动调焦机制。实验结果表明,对于各种状态下捕捉到的图像,都能够快速准确地定位到人体活动目标,能够满足盲人辅助感知设备对摄像头捕获人体目标信息的实际要求。

  4. 腹腔镜手术CO2气腹对机体的影响%Impact of CO2 pneumoperitoneum on body during laparoscopic surgery

    Institute of Scientific and Technical Information of China (English)

    杨文增; 郭景阳

    2013-01-01

      腹腔镜手术中需要CO2气腹维持操作空间,随着腹腔镜技术的进步,目前较大手术亦可以在腔镜下完成,手术时间相对延长,CO2气腹对内脏器官的压迫及气体的吸收均给患者的机体造成一定的影响,现就CO2气腹压力变化及气体吸收对机体功能的影响,给予综述。%  Laparoscopic surgery needs the CO2 pneumoperitoneum to maintain operating space, with the advances in laparoscopic techniques, larger surgery can also be done in endoscopic surgical time relatively. The oppression on the internal organs and thegas absorption when prolonged CO2 pneumoperitoneum produce certain impacts to patients. This article reviews CO2 pneumoperitoneum pressure changes and the gas absorption of body functions.

  5. Nose Surgery

    Science.gov (United States)

    ... is as high a priority as appearance. Can Cosmetic Nasal Surgery Create A "Perfect" Nose? Aesthetic nasal surgery (rhinoplasty) ... Cover Nasal Surgery? Insurance usually does not cover cosmetic surgery. However, surgery to correct or improve breathing function, ...

  6. Contours--Offshore Pigeon Point, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore Pigeon Point map area, California. The vector data file is...

  7. Water-table contours of Nevada

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of water-table contours for Nevada. These data were created as part of an effort to provide statewide information on water table and depth to...

  8. Contours--Offshore of Ventura, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3254 presents data for the bathymetric contours for several seafloor maps (see sheets 1, 2, 3, 7, 10, SIM 3254) of the Offshore of Ventura map...

  9. Contours--Offshore of Santa Barbara, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3281 presents data for the bathymetric contours for several seafloor maps (see sheets 1, 2, 3, 7, 10, SIM 3281) of the Offshore of Santa Barbara...

  10. Contours--Offshore Santa Cruz, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore Santa Cruz map area, California. The vector data file is...

  11. Contours-Offshore of Bodega Head, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Bodega Head map area, California. The vector data file...

  12. Contours--Offshore of San Francisco, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of San Francisco map area, California. The vector data file...

  13. Contours--Monterey Canyon and Vicinity, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents bathymetric contours for several seafloor maps of the Monterey Canyon and Vicinity map area, California. The raster data file is...

  14. Contours, Published in unknown, Sheboygan county.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset as of unknown. Data by this publisher are often provided in Sheboygan County Coordinate Grid coordinate system; in a Mercator projection; The...

  15. An Active Contour for Range Image Segmentation

    OpenAIRE

    Khaldi Amine; Merouani Hayet Farida

    2012-01-01

    In this paper a new classification of range image segmentation method is proposed according to the criterion of homogeneity which obeys the segmentation, then, a deformable model-type active contour “Snake” is applied to segment range images.

  16. Contours--Offshore Coal Oil Point, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3302 presents bathymetric contours for several seafloor maps of Offshore Coal Oil Point, California (vector data file is included in...

  17. Contours--Offshore of Pacifica, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Pacifica map area, California. The vector data file is...

  18. Transgressive Contours--Bolinas to Pescadero, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the transgressive contours for the Bolinas to Pescadero, California, region. The vector file is included in...

  19. Contours--Offshore of Bolinas, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Bolinas map area, California. The vector data file is...

  20. Contours--Offshore of Fort Ross, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Fort Ross map area, California. The vector data file is...

  1. Contours Offshore of Tomales Point, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Tomales Point map area, California. The vector data file...

  2. Modified Contour-Improved Perturbation Theory

    OpenAIRE

    Cvetic, Gorazd; Loewe, Marcelo; Martinez, Cristian; Valenzuela, Cristian

    2010-01-01

    The semihadronic tau decay width allows a clean extraction of the strong coupling constant at low energies. We present a modification of the standard "contour improved" method based on a derivative expansion of the Adler function. The approach eliminates ambiguities coming from the existence of different integral expressions for the semihadronic tau decay ratio. Compared to the standard method, renormalization scale dependence is by more than a factor two weaker in modified contour improved p...

  3. Automatic bootstrapping and tracking of object contours.

    Science.gov (United States)

    Chiverton, John; Xie, Xianghua; Mirmehdi, Majid

    2012-03-01

    A new fully automatic object tracking and segmentation framework is proposed. The framework consists of a motion-based bootstrapping algorithm concurrent to a shape-based active contour. The shape-based active contour uses finite shape memory that is automatically and continuously built from both the bootstrap process and the active-contour object tracker. A scheme is proposed to ensure that the finite shape memory is continuously updated but forgets unnecessary information. Two new ways of automatically extracting shape information from image data given a region of interest are also proposed. Results demonstrate that the bootstrapping stage provides important motion and shape information to the object tracker. This information is found to be essential for good (fully automatic) initialization of the active contour. Further results also demonstrate convergence properties of the content of the finite shape memory and similar object tracking performance in comparison with an object tracker with unlimited shape memory. Tests with an active contour using a fixed-shape prior also demonstrate superior performance for the proposed bootstrapped finite-shape-memory framework and similar performance when compared with a recently proposed active contour that uses an alternative online learning model. PMID:21908256

  4. Perception of illusory contours enhanced in motion

    Institute of Scientific and Technical Information of China (English)

    倪睿; 王志宏; 吴新年; 汪云九; 李东光

    2003-01-01

    Investigation on illusory contours is important for understanding the mechanisms un-derlying the object recognition of human visual system. Numerous researches have shown that illusory contours formed in motion and stereopsis are generated by the unmatched features. Here we conduct three psychophysical experiments to test if Kanizsa illusory contours are also caused by unmatched information. Different types of motion (including horizontal translation, radial ex-panding and shrinking) are utilized in the experiments. The results show that no matter under what kind of motion, when figures or background move separately illusory contours are perceived stronger, and there is no significant difference between the perceived strength in these two types of motion. However, no such enhancement of perceived strength is found when figures and background move together. It is found that the strengthened unmatched features generate the enhancement effect of illusory contour perception in motion. Thus the results suggest that the process of unmatched information in visual system is a critical step in the formation of illusory contours.

  5. Thoracic epidural analgesia in obese patients with body mass index of more than 30 kg/m 2 for off pump coronary artery bypass surgery

    Directory of Open Access Journals (Sweden)

    Sharma Munish

    2010-01-01

    Full Text Available Perioperative Thoracic epidural analgesia (TEA is an important part of a multimodal approach to improve analgesia and patient outcome after cardiac and thoracic surgery. This is particularly important for obese patients undergoing off pump coronary artery bypass surgery (OPCAB. We conducted a randomized clinical trial at tertiary care cardiac institute to compare the effect of TEA and conventional opioid based analgesia on perioperative lung functions and pain scores in obese patients undergoing OPCAB. Sixty obese patients with body mass index> 30 kg/m 2 for elective OPCAB were randomized into two groups (n=30 each. Patients in both the groups received general anesthesia but in group 1, TEA was also administered. We performed spirometry as preoperative assessment and at six hours, 24 hours, second, third, fourth and fifth day after extubation, along with arterial blood gases analysis. Visual analogue scale at rest and on coughing was recorded to assess the degree of analgesia. The other parameters observed were: time to endotracheal extubation, oxygen withdrawal time and intensive care unit length of stay. On statistical analysis there was a significant difference in Vital Capacity at six hours, 24 hours, second and third day postextubation. Forced vital capacity and forced expiratory volume in one second followed the same pattern for first four postoperative days and peak expiratory flow rate remained statistically high till second postoperative day. ABG values and PaO 2 /FiO 2 ratio were statistically higher in the study group up to five days. Visual analogue scale at rest and on coughing was significantly lower till fourth and third postoperative day respectively. Tracheal extubation time, oxygen withdrawal time and ICU stay were significantly less in group 1. The use of TEA resulted in better analgesia, early tracheal extubation and shorter ICU stay and should be considered for obese patients undergoing OPCAB.

  6. Full body photography in the massive weight loss population: an inquiry to optimize patient-centered care.

    Science.gov (United States)

    Wasicek, Philip; Kaswan, Sumesh; Messing, Susan; Gusenoff, Jeffrey A

    2013-11-01

    Medical photography of body contouring patients often requires complete nudity, placing patients in a vulnerable situation. We investigated patient perspectives on full body photography in an effort to better protect the patients and enhance comfort with the photography process. Sixty-five massive weight loss patients were identified who underwent body contouring surgery with full body photography. Photographs were taken at the time of initial consult, time of marking, and postoperatively. A retrospective chart review was performed to assess body mass indices and comorbidities, and a telephone survey inquired about several aspects of the photographic process. Fifty-six (86%) patients participated. Patients were more comfortable at the time of markings (P = 0.0004) and at the postoperative session (P = 0.0009). Patients' perception of positive body image increased after body contouring surgery (P < 0.0001). Patients who reported being comfortable at their initial session had a higher body mass index (P = 0.0027). Professionalism of the staff was rated as the most important aspect of the photographic process. Patients preferring a chaperone of the same sex tended to be less comfortable with the process (P = 0.015). Most patients preferred the surgeon as the photographer (P = 0.03). Patient comfort with full body photography improves quickly as they move through the surgical process. Maintaining professionalism is the most important factor in achieving patient trust and comfort. Limiting the number of observers in the room, providing explicit details of the photography process, and having at least 1 person of the same sex in the room can optimize patient safety and comfort. PMID:23542830

  7. Cataract Surgery

    Science.gov (United States)

    ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ...

  8. EFFECTS OF LONG-TERM ROUX-EN-Y GASTRIC BYPASS ON BODY WEIGHT AND CLINICAL METABOLIC COMORBIDITIES IN BARIATRIC SURGERY SERVICE OF A UNIVERSITY HOSPITAL

    Science.gov (United States)

    da SILVA, Cátia Ferreira; COHEN, Larissa; SARMENTO, Luciana d'Abreu; ROSA, Felipe Monnerat Marino; ROSADO, Eliane Lopes; CARNEIRO, João Régis Ivar; de SOUZA, Antônio Augusto Peixoto; MAGNO, Fernanda Cristina Carvalho Mattos

    2016-01-01

    ABSTRACT Background: Due to the high failure rate observed in the clinical treatment of morbid obesity an increase in bariatric surgery indications, as an alternative for the control of obesity and comorbidities, is noticeable. Aim: To evaluate the performance of type 2 diabetes mellitus, high blood pressure and dyslipidemia in patients submitted to Roux-en-Y gastric bypass in late follow-up. Methods: Retrospective analysis of 59 patients included in the bariatric surgery program. Anthropometric (height and body weight) and laboratory (LDLc, HDLc, VLDLc, triglyceride -TG - and glucose) data were collected on pre- and postoperative stages, through medical records. Results: Among the patients, 86% were female aged 43±11, of whom 52% had attended high school. The average postoperative time was 7±3 years. During the postoperative period, there were decreases of weight and body mass index, respectively (133±06 kg vs 91±04 kg p<0.05 e 49±74 kg/m2 vs 33±79 kg/m2, p<0.05). In comparison to the preoperative stage, lower concentrations of glucose (101.00±26.99 vs 89,11±15.19, p=0.014), total cholesterol rates (179.00±37,95 vs 167.48±28,50, p=0.016), LDLc (104.30±33.12 vs 91.46±24.58, p=0.016), VLDLc (25.40±11,12 vs 15.68±7.40, p<0.01), and TG (143.35±86.35 vs 82.45±37.39, p<0.01) and higher concentrations of HDLc (43.53±8.23 vs 57.90±15.60, p<0.01) were identified in the postoperative stage. 40% of hypertensive patients were still undergoing high blood pressure treatment during the postoperative stage. There was remission of type 2 diabetes mellitus and dyslipidemia on 81% and 94% of the cases, respectively. Conclusion: Roux-en-Y gastric bypass has proven itself to be an effective long term procedure, promoting weight loss, remission of DM2 and dyslipidemia. PMID:27683769

  9. Underlying anatomy for CTV contouring and lymphatic drainage in rectal cancer radiation therapy.

    Science.gov (United States)

    Arcangeli, Stefano; Valentini, Vincenzo; Nori, Stefania L; Fares, Claudia; Dinapoli, Nicola; Gambacorta, Maria Antonierrta

    2003-01-01

    Despite the low local recurrence rate that can be achieved by adequate surgery (total mesorectal excision--TME), radiation therapy was shown to play a significant role in reducing this risk. The widespread use of TME in many European Centers has introduced a new terminology and the need to identify the area at major risk for local failure using this surgical procedure. In the surgical series where extended extra-mesorectal surgery was performed, the role of lymphatic spread was evidenced, especially for low rectal cancer, through the pelvic parietal fascia and lateral pelvic spaces. The aim of this study was to better define some anatomic concepts and the main risk factors which impact on CTV contouring and field conformation in rectal cancer treatment. This information helps formulating guidelines for CTV contouring in daily radiotherapy practice, in order to define the best therapy, according to the tumor stage and location. PMID:15018321

  10. Clinical and biochemical outcomes for additive mesenteric and lower body perfusion during hypothermic circulatory arrest for complex total aortic arch replacement surgery.

    Science.gov (United States)

    Fernandes, P; Cleland, A; Adams, C; Chu, M W A

    2012-11-01

    protection strategy for complex aortic arch surgery. This additive perfusion strategy may attenuate visceral and lower body ischemia that normally develops during periods of deep hypothermic circulatory arrest.

  11. Prostate Contouring Variation: Can It Be Fixed?

    International Nuclear Information System (INIS)

    Purpose: To assess whether an education program on CT and MRI prostate anatomy would reduce inter- and intraobserver prostate contouring variation among experienced radiation oncologists. Methods and Materials: Three patient CT and MRI datasets were selected. Five radiation oncologists contoured the prostate for each patient on CT first, then MRI, and again between 2 and 4 weeks later. Three education sessions were then conducted. The same contouring process was then repeated with the same datasets and oncologists. The observer variation was assessed according to changes in the ratio of the encompassing volume to intersecting volume (volume ratio [VR]), across sets of target volumes. Results: For interobserver variation, there was a 15% reduction in mean VR with CT, from 2.74 to 2.33, and a 40% reduction in mean VR with MRI, from 2.38 to 1.41 after education. A similar trend was found for intraobserver variation, with a mean VR reduction for CT and MRI of 9% (from 1.51 to 1.38) and 16% (from 1.37 to 1.15), respectively. Conclusion: A well-structured education program has reduced both inter- and intraobserver prostate contouring variations. The impact was greater on MRI than on CT. With the ongoing incorporation of new technologies into routine practice, education programs for target contouring should be incorporated as part of the continuing medical education of radiation oncologists.

  12. Development of a CONTOUR-METER

    International Nuclear Information System (INIS)

    Dose calculation in patients undergoing radiotherapy treatments requires the knowledge of their anatomical geometry.Making reference to the specific case of breast cancer, one of the measurement that are made on the patients is the acquisition of the breast's contour, determined in an axial plane from a point marked on the breastbone until another point marked on the thorax side under the armpit.This measurement is normally made with a mechanic contour-meter: a device formed by a series of plastic-covered wires designed to be applied on the patient's skin copying the breast contour after it deformation.The geometrical error associated with this procedure is ± 1 cm. The precision of the dose calculation could be increased acquiring a breast contour more accurate.This objective was achieved developing a method based on breast images from a digital camera.The algorithms to obtain an axial-plane image of the contour from digital photographs taken from arbitrary positions were developed.A geometric transformation is applied to the photograph to correct for perspective distortions, obtaining a frontal - undistorted image (axial-plane image).A software tool to make all the image processing was developed under MatLab.The maximum geometrical error detected during the validation of the process was 2 mm

  13. Prostate contouring in MRI guided biopsy.

    Science.gov (United States)

    Vikal, Siddharth; Haker, Steven; Tempany, Clare; Fichtinger, Gabor

    2009-03-27

    With MRI possibly becoming a modality of choice for detection and staging of prostate cancer, fast and accurate outlining of the prostate is required in the volume of clinical interest. We present a semi-automatic algorithm that uses a priori knowledge of prostate shape to arrive at the final prostate contour. The contour of one slice is then used as initial estimate in the neighboring slices. Thus we propagate the contour in 3D through steps of refinement in each slice. The algorithm makes only minimum assumptions about the prostate shape. A statistical shape model of prostate contour in polar transform space is employed to narrow search space. Further, shape guidance is implicitly imposed by allowing only plausible edge orientations using template matching. The algorithm does not require region-homogeneity, discriminative edge force, or any particular edge profile. Likewise, it makes no assumption on the imaging coils and pulse sequences used and it is robust to the patient's pose (supine, prone, etc.). The contour method was validated using expert segmentation on clinical MRI data. We recorded a mean absolute distance of 2.0 ± 0.6 mm and dice similarity coefficient of 0.93 ± 0.3 in midsection. The algorithm takes about 1 second per slice. PMID:21132083

  14. Surface reconstruction from sparse fringe contours

    Energy Technology Data Exchange (ETDEWEB)

    Cong, G.; Parvin, B.

    1998-08-10

    A new approach for reconstruction of 3D surfaces from 2D cross-sectional contours is presented. By using the so-called ''Equal Importance Criterion,'' we reconstruct the surface based on the assumption that every point in the region contributes equally to the surface reconstruction process. In this context, the problem is formulated in terms of a partial differential equation (PDE), and we show that the solution for dense contours can be efficiently derived from distance transform. In the case of sparse contours, we add a regularization term to insure smoothness in surface recovery. The proposed technique allows for surface recovery at any desired resolution. The main advantage of the proposed method is that inherent problems due to correspondence, tiling, and branching are avoided. Furthermore, the computed high resolution surface is better represented for subsequent geometric analysis. We present results on both synthetic and real data.

  15. Modified Contour-Improved Perturbation Theory

    CERN Document Server

    Cvetic, Gorazd; Martinez, Cristian; Valenzuela, Cristian

    2010-01-01

    The semihadronic tau decay width allows a clean extraction of the strong coupling constant at low energies. We present a modification of the standard "contour improved" method based on a derivative expansion of the Adler function. The approach eliminates ambiguities coming from the existence of different integral expressions for the semihadronic tau decay ratio. Compared to the standard method, renormalization scale dependence is by more than a factor two weaker in modified contour improved perturbation theory. The last term of the expansion is reduced, and renormalization scheme dependence remains approximately equal. The extracted QCD coupling at the tau mass scale is by 2$%$ lower than the "contour improved" value. We find $\\alpha_s(M_Z^2)=0.1211\\pm 0.0010$.

  16. A FUZZY FILTERING MODEL FOR CONTOUR DETECTION

    Directory of Open Access Journals (Sweden)

    T.C. Rajakumar

    2011-04-01

    Full Text Available Contour detection is the basic property of image processing. Fuzzy Filtering technique is proposed to generate thick edges in two dimensional gray images. Fuzzy logic is applied to extract value for an image and is used for object contour detection. Fuzzy based pixel selection can reduce the drawbacks of conventional methods(Prewitt, Robert. In the traditional methods, filter mask is used for all kinds of images. It may succeed in one kind of image but fail in another one. In this frame work the threshold parameter values are obtained from the fuzzy histogram of the input image. The Fuzzy inference method selects the complete information about the border of the object and the resultant image has less impulse noise and the contrast of the edge is increased. The extracted object contour is thicker than the existing methods. The performance of the algorithm is tested with Peak Signal Noise Ratio(PSNR and Complex Wavelet Structural Similarity Metrics(CWSSIM.

  17. Effects of facial hard tissue surgery on facial aesthetics: changes in facial content and frames.

    Science.gov (United States)

    Choi, Jin-Young; Lee, Sang-Hoon; Baek, Seung-Hak

    2012-11-01

    Aesthetic units of the face can be divided into facial content (FC; eyes, nose, lips, and mouth), anterior facial frame (AFF; a contour line from the trichion, the temporal line of the frontal bone, the lateral orbital rim, the most lateral line of the anterior part of the zygomatic body, the anterior border of the masseter muscle, to the inferior border of the chin), and posterior facial frame (PFF; a contour line from the hairline, the zygomatic arch, to the ramus and gonial angle area of the mandible). The size and shape of each FC and the balance and proportion between FCs create a unique appearance for each person. The facial form can be determined through the combination of AFF and PFF. In the Asian population, clinicians frequently encounter problems of FC (eg, acute nasolabial angle, protrusive and everted lips, nonconsonant lip line, or lip canting), AFF (eg, midface hypoplasia, protrusive and asymmetric chin, vertical deficiency/excess of the anterior maxilla and symphysis, or prominent zygoma), and PFF (eg, square mandibular angle). These problems can be efficiently and effectively corrected through the combination of hard tissue surgery such as anterior segmental osteotomy, genioplasty, mandibular angle reduction, malarplasty, and orthognathic surgery. Therefore, the purposes of this article were to introduce the concepts of FC, AFF, and PFF, and to explain the effects of facial hard tissue surgery on facial aesthetics.

  18. Conversion of contours to cartesian grids

    DEFF Research Database (Denmark)

    Mann, Jakob; Broe, Brian Riget

    A robust and efficient method of calculating a cartesian grid of heights or roughnesses from contour line maps is developed. The purpose of the grids is to serve as input for atmospheric flow solvers such as WAsP Engineering or EllipSys3D. The method builds on Delaunay triangulation constrained t...... to include all contour segments in the triangulation. It is furthermore refined to avoid spurious flat areas produced by the Delaunay triangulation. Robust ways to extrapolate beyond the convex hull of the map points are provided....

  19. Connection Skeleton Extraction Based on Contour Connectedness

    Institute of Scientific and Technical Information of China (English)

    CHEN Mang; LIU Yun-cai

    2008-01-01

    A stable skeleton is very important to some applications such as vehicle navigation, object represent and pattern recognition. The connection skeleton is just one that not only can be computed stably but also can figure the connectivity structure of contour. A new method named continuous connectivity detection and a new model named approximate regular polygon (ARP) were proposed for connection skeleton extraction. Both the method and the model were tested by the real maps of road network including flyovers, interchanges and other common object contours. Satisfactory results were obtained.

  20. Analysis of CVC roll contour and determination of roll crown

    Institute of Scientific and Technical Information of China (English)

    Guang Xu; Xianjun Liu; Jiarong Zhao; Junwei Xiong

    2007-01-01

    Mathematical analysis of continuous variable crown (CVC) roll contour used in CSP production line was conducted and the roll contour function of CVC roll was obtained. The validation with actual CVC roll contour shows that the calculation values of the roll contour function and the actual roll contour parameters given by equipment provider are the same, which proves that the roll contour function of CVC rolls given in this article is correct. The nonlinear relationship between the roll crown of CVC rolls and roll shift amounts was deduced. The concept of crown extremum was given.

  1. Contours--Offshore of Carpinteria, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3261 presents data for the bathymetric contours for several seafloor maps (see sheets 1, 2, 3, 5 [in figs. 1, 2, 3], 7, 10, SIM 3261) of the...

  2. An Active Contour for Range Image Segmentation

    Directory of Open Access Journals (Sweden)

    Khaldi Amine

    2012-06-01

    Full Text Available In this paper a new classification of range image segmentation method is proposed according to the criterion of homogeneity which obeys the segmentation, then, a deformable model-type active contour “Snake” is applied to segment range images.

  3. Some Contour Integrals Involving Generalised Hypergeometric Function

    Directory of Open Access Journals (Sweden)

    S. D. Bajpai

    1970-04-01

    Full Text Available Contour integral involving Fox's H-function and modified Bessel function of the first kind has been calculated. Some important properties and particular cases of H-function, which is a generalization of G-function, have been derived and discussed.

  4. Contour detection by surround suppression of texture

    NARCIS (Netherlands)

    Petkov, Nicolai; Tavares, JMRS; Jorge, RMN

    2007-01-01

    Based on a keynote lecture at Complmage 2006, Coimbra, Oct. 20-21, 2006, an overview is given of our activities in modelling and using surround inhibition for contour detection. The effect of suppression of a line or edge stimulus by similar surrounding stimuli is known from visual perception studie

  5. An Active Contour for Range Image Segmentation

    Directory of Open Access Journals (Sweden)

    Khaldi Amine

    2012-07-01

    Full Text Available In this paper a new classification of range image segmentation method is proposed according to the criterion of homogeneity which obeys the segmentation, then, a deformable model-type active contour “Snake” is applied to segment range images.

  6. Contours--Offshore of San Gregorio, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of SIM 3306 presents data for the bathymetric contours for several seafloor maps (see sheets 1, 2, 3, 7, 10, SIM 3306) of the Offshore of San Gregorio map...

  7. Indirect Tumor Cell Death After High-Dose Hypofractionated Irradiation: Implications for Stereotactic Body Radiation Therapy and Stereotactic Radiation Surgery

    Energy Technology Data Exchange (ETDEWEB)

    Song, Chang W., E-mail: songx001@umn.edu [Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Medical School, Minneapolis, Minnesota (United States); Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Lee, Yoon-Jin [Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Griffin, Robert J. [Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Park, Inhwan [Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Medical School, Minneapolis, Minnesota (United States); Koonce, Nathan A. [Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, Arkansas (United States); Hui, Susanta [Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Medical School, Minneapolis, Minnesota (United States); Kim, Mi-Sook [Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Dusenbery, Kathryn E. [Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Medical School, Minneapolis, Minnesota (United States); Sperduto, Paul W. [Minneapolis Radiation Oncology and Gamma Knife Center, University of Minnesota, Minneapolis, Minnesota (United States); Cho, L. Chinsoo [Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Medical School, Minneapolis, Minnesota (United States)

    2015-09-01

    Purpose: The purpose of this study was to reveal the biological mechanisms underlying stereotactic body radiation therapy (SBRT) and stereotactic radiation surgery (SRS). Methods and Materials: FSaII fibrosarcomas grown subcutaneously in the hind limbs of C3H mice were irradiated with 10 to 30 Gy of X rays in a single fraction, and the clonogenic cell survival was determined with in vivo–in vitro excision assay immediately or 2 to 5 days after irradiation. The effects of radiation on the intratumor microenvironment were studied using immunohistochemical methods. Results: After cells were irradiated with 15 or 20 Gy, cell survival in FSaII tumors declined for 2 to 3 days and began to recover thereafter in some but not all tumors. After irradiation with 30 Gy, cell survival declined continuously for 5 days. Cell survival in some tumors 5 days after 20 to 30 Gy irradiation was 2 to 3 logs less than that immediately after irradiation. Irradiation with 20 Gy markedly reduced blood perfusion, upregulated HIF-1α, and increased carbonic anhydrase-9 expression, indicating that irradiation increased tumor hypoxia. In addition, expression of VEGF also increased in the tumor tissue after 20 Gy irradiation, probably due to the increase in HIF-1α activity. Conclusions: Irradiation of FSaII tumors with 15 to 30 Gy in a single dose caused dose-dependent secondary cell death, most likely by causing vascular damage accompanied by deterioration of intratumor microenvironment. Such indirect tumor cell death may play a crucial role in the control of human tumors with SBRT and SRS.

  8. Indirect Tumor Cell Death After High-Dose Hypofractionated Irradiation: Implications for Stereotactic Body Radiation Therapy and Stereotactic Radiation Surgery

    International Nuclear Information System (INIS)

    Purpose: The purpose of this study was to reveal the biological mechanisms underlying stereotactic body radiation therapy (SBRT) and stereotactic radiation surgery (SRS). Methods and Materials: FSaII fibrosarcomas grown subcutaneously in the hind limbs of C3H mice were irradiated with 10 to 30 Gy of X rays in a single fraction, and the clonogenic cell survival was determined with in vivo–in vitro excision assay immediately or 2 to 5 days after irradiation. The effects of radiation on the intratumor microenvironment were studied using immunohistochemical methods. Results: After cells were irradiated with 15 or 20 Gy, cell survival in FSaII tumors declined for 2 to 3 days and began to recover thereafter in some but not all tumors. After irradiation with 30 Gy, cell survival declined continuously for 5 days. Cell survival in some tumors 5 days after 20 to 30 Gy irradiation was 2 to 3 logs less than that immediately after irradiation. Irradiation with 20 Gy markedly reduced blood perfusion, upregulated HIF-1α, and increased carbonic anhydrase-9 expression, indicating that irradiation increased tumor hypoxia. In addition, expression of VEGF also increased in the tumor tissue after 20 Gy irradiation, probably due to the increase in HIF-1α activity. Conclusions: Irradiation of FSaII tumors with 15 to 30 Gy in a single dose caused dose-dependent secondary cell death, most likely by causing vascular damage accompanied by deterioration of intratumor microenvironment. Such indirect tumor cell death may play a crucial role in the control of human tumors with SBRT and SRS

  9. Clinical outcomes of video‐assisted thoracic surgery and stereotactic body radiation therapy for early‐stage non‐small cell lung cancer: A meta‐analysis

    Science.gov (United States)

    Ma, Longfei

    2016-01-01

    Background We compared video‐assisted thoracoscopic surgery (VATS) lobectomy and stereotactic body radiation therapy (SABR) to explore clinical outcomes in the treatment of patients with early stage NSCLC. Methods Major medical databases were systematically searched to identify studies on VATS and SBRT published between January 2010 and October 2015. English publications of stage I and II NSCLC with adequate patients and SBRT doses were included. A multivariate random effects model was used to perform meta‐analysis to compare overall survival (OS) and disease‐free survival (DFS) between VATS and SBRT, adjusting for median age and operable patient numbers. Results Thirteen VATS (3436 patients) and 24 SBRT (4433) studies were eligible. The median age and follow‐up duration was 68 years and 42 months for VATS and 74 years and 29.4 months for SBRT patients. After adjusting for the proportion of operable patients and median age, the estimated OS rates at one, two, three, and five years with VATS were 94%, 89%, 84%, and 69% compared with 96%, 94%, 89%, and 82% for SBRT. The estimated DFS rates at one, two, three, and five years with VATS were 97%, 93%, 87%, and 77% compared with 86%, 80%, 73%, and 58% for SBRT. Conclusion Before adjustment, patients treated with SBRT had poorer clinical outcomes compared to those treated with VATS. A substantial difference between median age and operability exists between patients treated with SBRT and VATS. After adjusting for these differences, OS and DFS did not differ significantly between the two techniques. PMID:27385987

  10. Subsidence Contours for South Louisiana; UTM 15N NAD83; LRA (2005); [subsidence_contours

    Data.gov (United States)

    Louisiana Geographic Information Center — The GIS data shapefile represents average subsidence contour intervals (0.02 cm/year over 10,000 years) for Coastal LA derived from the following: Kulp, M.A., 2000,...

  11. Plastic Surgery

    Science.gov (United States)

    ... How Can I Help a Friend Who Cuts? Plastic Surgery KidsHealth > For Teens > Plastic Surgery Print A ... her forehead lightened with a laser? What Is Plastic Surgery? Just because the name includes the word " ...

  12. Foot Surgery

    Science.gov (United States)

    ... in the toe to maintain realignment. Neuroma Surgery: Neuroma surgery involves removing a benign enlargement of a nerve, usually between the metatarsal heads in the ball of the foot. This soft tissue surgery tends to have a ...

  13. Lung surgery

    Science.gov (United States)

    ... Pneumonectomy; Lobectomy; Lung biopsy; Thoracoscopy; Video-assisted thoracoscopic surgery; VATS ... You will have general anesthesia before surgery. You will be asleep and unable to feel pain. Two common ways to do surgery on your lungs are thoracotomy and video- ...

  14. Differences in gestational weight gain between pregnancies before and after maternal bariatric surgery correlate with differences in birth weight but not with scores on the body mass index in early childhood

    DEFF Research Database (Denmark)

    Berglind, D; Willmer, M; Näslund, E;

    2013-01-01

    Large maternal gestational weight gain (GWG) is associated with increased birth weight and increased risk of obesity in offspring, but these associations may be confounded by genetic and environmental factors. The aim was to investigate the effects of differences in GWG in all three trimesters on...... on differences in birth weight and in body mass index (BMI) scores at 4 and 6 years of age, within siblings born before and after bariatric surgery....

  15. The contour method cutting assumption: error minimization and correction

    Energy Technology Data Exchange (ETDEWEB)

    Prime, Michael B [Los Alamos National Laboratory; Kastengren, Alan L [ANL

    2010-01-01

    The recently developed contour method can measure 2-D, cross-sectional residual-stress map. A part is cut in two using a precise and low-stress cutting technique such as electric discharge machining. The contours of the new surfaces created by the cut, which will not be flat if residual stresses are relaxed by the cutting, are then measured and used to calculate the original residual stresses. The precise nature of the assumption about the cut is presented theoretically and is evaluated experimentally. Simply assuming a flat cut is overly restrictive and misleading. The critical assumption is that the width of the cut, when measured in the original, undeformed configuration of the body is constant. Stresses at the cut tip during cutting cause the material to deform, which causes errors. The effect of such cutting errors on the measured stresses is presented. The important parameters are quantified. Experimental procedures for minimizing these errors are presented. An iterative finite element procedure to correct for the errors is also presented. The correction procedure is demonstrated on experimental data from a steel beam that was plastically bent to put in a known profile of residual stresses.

  16. RESEARCH OF BASIFACIAL CONTOURING SCULPTURE BY MANDIBULAR ANGLE OSTECTOMY

    Institute of Scientific and Technical Information of China (English)

    FANG Jian-lin; DAI Chuan-chang; ZHU Guo-xian; ZHANG Ying; JIN Yu-qing; WANG Wei; QI Chuan-liang

    2006-01-01

    Objective Mandibular angle ostectomy is usually applied to the facial contouring sculpture.We evaluated the various techniques in order to enhance the precision and avoid unnecessary damage. Methods Before operation the area and quantity resected bone were designed according to facial measurement, mandible pantomography and orthophoria and lateral localized radiograph of skull. The Incises of mandibular angle ostectomy included intraoral, retroauricular or intraoral associated with retroauricular. Howerer, the sagittal resection of mandible outer table was necessary in all intraoral incise. Results Single mandibular angle ostectomy was not satisfactory for the patients having mandible hypertrophy with over-width basifacial contouring. Mandibular angle ostectomy combined with the sagittal resection of outer table of mandibular angle were required. Good symmetry and ap pearance were gained in 206 cases. One case had facial paralysis. Two patients occured mandibular fracture during the operation. Three cases complicated angled deformity at mandible body. Conclusion Reduction mandibuloplasty should be selected depends on varied types of mandibular angle hypertrophy before operation.

  17. Open Contours Extraction of Rotational Surface Oriented to Layer Measurement

    Institute of Scientific and Technical Information of China (English)

    亓利伟; 赵毅; 李明辉

    2003-01-01

    With layer-measured contours, an algorithm that can extract the contour segments from a rotational surface is presented. The extraction can be divided into two stages, i. e. the rough segmentation and the refinement. In the rough segmenting stage, an optimal contour matching method is put forward to find similar contour segment from another closed contour with respect to the seed contour. In the refining stage, an iterative way that can extract a circular arc precisely is presented based on parameters identification and contour-ends expanding/shrinking operation. The algorithm can extract the open contour segments from a rotational surface precisely, as demonstrated in the examples. Based on the work of this paper, further research, such as parameter identification of 3 - D surface and CAD model creation, can be conducted.

  18. USGS Elevation Contours Overlay Map Service from The National Map

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The USGS Elevation Contours service from The National Map (TNM) consists of contours generated for the conterminous United States from 1- and 1/3 arc-second...

  19. Automatic liver contouring for radiotherapy treatment planning

    Science.gov (United States)

    Li, Dengwang; Liu, Li; Kapp, Daniel S.; Xing, Lei

    2015-09-01

    To develop automatic and efficient liver contouring software for planning 3D-CT and four-dimensional computed tomography (4D-CT) for application in clinical radiation therapy treatment planning systems. The algorithm comprises three steps for overcoming the challenge of similar intensities between the liver region and its surrounding tissues. First, the total variation model with the L1 norm (TV-L1), which has the characteristic of multi-scale decomposition and an edge-preserving property, is used for removing the surrounding muscles and tissues. Second, an improved level set model that contains both global and local energy functions is utilized to extract liver contour information sequentially. In the global energy function, the local correlation coefficient (LCC) is constructed based on the gray level co-occurrence matrix both of the initial liver region and the background region. The LCC can calculate the correlation of a pixel with the foreground and background regions, respectively. The LCC is combined with intensity distribution models to classify pixels during the evolutionary process of the level set based method. The obtained liver contour is used as the candidate liver region for the following step. In the third step, voxel-based texture characterization is employed for refining the liver region and obtaining the final liver contours. The proposed method was validated based on the planning CT images of a group of 25 patients undergoing radiation therapy treatment planning. These included ten lung cancer patients with normal appearing livers and ten patients with hepatocellular carcinoma or liver metastases. The method was also tested on abdominal 4D-CT images of a group of five patients with hepatocellular carcinoma or liver metastases. The false positive volume percentage, the false negative volume percentage, and the dice similarity coefficient between liver contours obtained by a developed algorithm and a current standard delineated by the expert group

  20. [External contour acquisition system for radiotherapy: an original solution].

    Science.gov (United States)

    Létourneau, D; Brochet, F; Bohémier, R; Gagnon, J

    2000-01-01

    A contour acquisition system has been designed in radiotherapy at the Sagamie Hospital complex (Chicoutimi, Québec) to measure the external contours of the patients who do not need a CT exam. This measuring system can produce transversal, sagittal or coronal patient contours in the treatment position. The absolute accuracy of the system is +/- 1 mm. The contours produced by this equipment can be transferred electronically or on paper to the planning system.

  1. Contours, contours 500 ft, Published in 2008, 1:24000 (1in=2000ft) scale, Box Elder County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:24000 (1in=2000ft) scale, was produced all or in part from Other information as of 2008. It is described as 'contours 500 ft'....

  2. Contours, contours 5m tc, Published in 2009, 1:24000 (1in=2000ft) scale, Tooele County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:24000 (1in=2000ft) scale, was produced all or in part from Other information as of 2009. It is described as 'contours 5m tc'....

  3. Contours, Tagged Vector Contours obtained from DASC, Published in 2003, 1:24000 (1in=2000ft) scale, Reno County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:24000 (1in=2000ft) scale as of 2003. It is described as 'Tagged Vector Contours obtained from DASC'. Data by this publisher...

  4. Contours, 2 foot contours, Published in 2010, 1:1200 (1in=100ft) scale, Green Lake County, WI.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from LIDAR information as of 2010. It is described as '2 foot contours'....

  5. Contours, contours 100 ft, Published in 2008, 1:24000 (1in=2000ft) scale, Box Elder County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:24000 (1in=2000ft) scale, was produced all or in part from Other information as of 2008. It is described as 'contours 100 ft'....

  6. Contour Propagation With Riemannian Elasticity Regularization

    DEFF Research Database (Denmark)

    Bjerre, Troels; Hansen, Mads Fogtmann; Sapru, W.;

    2011-01-01

    guided corrections. This study compares manual delineations in replanning CT scans of head-and-neck patients to automatic contour propagation using deformable registration with Riemannian regularization. The potential benefit of locally assigned regularization parameters according to tissue type...... the planning CT onto the rescans and correcting to reflect actual anatomical changes. For deformable registration, a free-form, multi-level, B-spline deformation model with Riemannian elasticity, penalizing non-rigid local deformations, and volumetric changes, was used. Regularization parameters was defined...... regularization parameters was performed. For each replanning scan, the volume of the manually delineated and automatically propagated GTV was determined and Dice’s coefficient was calculated between segmentations from the propagated contours and manual delineations. Results: The replanning segmentations showed...

  7. Human Lips-Contour Recognition and Tracing

    Directory of Open Access Journals (Sweden)

    Md. Hasan Tareque

    2014-01-01

    Full Text Available Human-lip detection is an important criterion for many automated modern system in present day. Like computerized speech reading, face recognition etc. system can work more precisely if human-lip can detect accurately. There are many processes for detecting human-lip. In this paper an approach is developed so that the region of a human-lip can be detected, we called it lip contour. For this a region-based Active Contour Model (ACM is introduced with watershed segmentation. In this model we used global energy terms instead of local energy terms because, global energy gives better convergence rate for malicious environment. At the time of ACM initialization by using H8 based on Lyapunov stability theory, the system gives more accurate and stable result.

  8. Contour detection combined with depth information

    Science.gov (United States)

    Xiao, Jie; Cai, Chao

    2015-12-01

    Many challenging computer vision problems have been proven to benefit from the incorporation of depth information, to name a few, semantic labellings, pose estimations and even contour detection. Different objects have different depths from a single monocular image. The depth information of one object is coherent and the depth information of different objects may vary discontinuously. Meanwhile, there exists a broad non-classical receptive field (NCRF) outside the classical receptive field (CRF). The response of the central neuron is affected not only by the stimulus inside the CRF, but also modulated by the stimulus surrounding it. The contextual modulation is mediated by horizontal connections across the visual cortex. Based on the findings and researches, a biological-inspired contour detection model which combined with depth information is proposed in this paper.

  9. Statistical modeling of violin bowing parameter contours

    OpenAIRE

    Maestre G??mez, Esteban

    2009-01-01

    We present a framework for modeling right-hand gestures in bowed-string instrument playing, applied to violin. Nearly non-intrusive sensing techniques allow for accurate acquisition of relevant timbre-related bowing gesture parameter cues. We model the temporal contour of bow transversal velocity, bow pressing force, and bow-bridge distance as sequences of short segments, in particular B??ezier cubic curve segments. Considering different articulations, dynamics, and contexts, a number of n...

  10. Musical Pattern Design Using Contour Icons

    OpenAIRE

    Cullen, Charlie; Coyle, Eugene

    2006-01-01

    This paper considers the use of Contour Icons in the design and implementation of musical patterns, for the purposes of detection and recognition. Research work had endeavoured to deliver musical patterns that were both distinct and memorable, and to this end a set of basic melodic shapes were introduced using a Sonification application called TrioSon that had been designed for the purpose. Existing work in the field (such as that concerning Earcon design) has considered the mechanisms by whi...

  11. A variational approach for object contour tracking

    OpenAIRE

    Papadakis, Nicolas; Mémin, Etienne; Cao, Frederic

    2005-01-01

    International audience In this paper we describe a new framework for the tracking of closed curves described through implicit surface modeling. The approach proposed here enables a continuous tracking along an image sequence of deformable object contours. Such an approach is formalized through the minimization of a global spatio-temporal continuous cost functional stemming from a Bayesian Maximum a posteriori estimation of a Gaussian probability distribution. The resulting minimization seq...

  12. Processed bovine cartilage: an improved biosynthetic implant for contour defects

    Energy Technology Data Exchange (ETDEWEB)

    Ersek, R.A.; Hart, W.G. Jr.; Greer, D.; Beisang, A.A.; Flynn, P.J.; Denton, D.R.

    1984-05-01

    Irradiated human cartilage has been found to be a superior implant material for correction of contour defects; however, availability problems have prevented this material from gaining wide acceptance. Implantation of processed irradiated bovine cartilage in primates and rabbits, as described here, provides strong evidence that this material performs like irradiated allograft cartilage antigenically and has certain cosmetic advantages over allograft cartilage. Our studies in primates have shown that there is no systemically measurable antibody-antigen reaction, either cellular or noncellular, to irradiated processed bovine cartilage. Neither primary nor second-set provocative implantations produced any measurable rejection. In rabbits, composite grafts of two pieces of irradiated bovine cartilage adjacent to each other were also well tolerated, with no measurable absorption and with capsule formation typical of a foreign body reaction to an inert object.

  13. Contour Estimation by Array Processing Methods

    Directory of Open Access Journals (Sweden)

    Bourennane Salah

    2006-01-01

    Full Text Available This work is devoted to the estimation of rectilinear and distorted contours in images by high-resolution methods. In the case of rectilinear contours, it has been shown that it is possible to transpose this image processing problem to an array processing problem. The existing straight line characterization method called subspace-based line detection (SLIDE leads to models with orientations and offsets of straight lines as the desired parameters. Firstly, a high-resolution method of array processing leads to the orientation of the lines. Secondly, their offset can be estimated by either the well-known method of extension of the Hough transform or another method, namely, the variable speed propagation scheme, that belongs to the array processing applications field. We associate it with the method called "modified forward-backward linear prediction" (MFBLP. The signal generation process devoted to straight lines retrieval is retained for the case of distorted contours estimation. This issue is handled for the first time thanks to an inverse problem formulation and a phase model determination. The proposed method is initialized by means of the SLIDE algorithm.

  14. Informed Consent as a Litigation Strategy in the Field of Aesthetic Surgery: An Analysis Based on Court Precedents

    Science.gov (United States)

    2016-01-01

    Background In an increasing number of lawsuits doctors lose, despite providing preoperative patient education, because of failure to prove informed consent. We analyzed judicial precedents associated with insufficient informed consent to identify judicial factors and trends related to aesthetic surgery medical litigation. Methods We collected data from civil trials between 1995 and 2015 that were related to aesthetic surgery and resulted in findings of insufficient informed consent. Based on these data, we analyzed the lawsuits, including the distribution of surgeries, dissatisfactions, litigation expenses, and relationship to informed consent. Results Cases were found involving the following types of surgery: facial rejuvenation (38 cases), facial contouring surgery (27 cases), mammoplasty (16 cases), blepharoplasty (29 cases), rhinoplasty (21 cases), body-contouring surgery (15 cases), and breast reconstruction (2 cases). Common reasons for postoperative dissatisfaction were deformities (22%), scars (17%), asymmetry (14%), and infections (6%). Most of the malpractice lawsuits occurred in Seoul (population 10 million people; 54% of total plastic surgeons) and in primary-level local clinics (113 cases, 82.5%). In cases in which only invalid informed consent was recognized, the average amount of consolation money was KRW 9,107,143 (USD 8438). In cases in which both violation of non-malfeasance and invalid informed consent were recognized, the average amount of consolation money was KRW 12,741,857 (USD 11,806), corresponding to 38.6% of the amount of the judgment. Conclusions Surgeons should pay special attention to obtaining informed consent, because it is a double-edged sword; it has clinical purposes for doctors and patients but may also be a litigation strategy for lawyers. PMID:27689046

  15. Life after weight-loss surgery

    Science.gov (United States)

    ... as your body gets used to the weight loss and your weight becomes stable. It is important that you follow ... taking vitamins. You may become sad after having weight-loss surgery. The reality of life after surgery may ...

  16. Incorporating Prior Shape into Geometric Active Contours for Face Contour Detection

    Institute of Scientific and Technical Information of China (English)

    HUANGFuzhen; SUJianbo; XIYugeng

    2004-01-01

    In this paper a new method that incorporates prior shape information into geometric active contours for face contour detection is proposed. As in general a human face can be treated as an ellipse with a little shape variation, the prior face shape is represented as an elliptical curve. By combining the prior face shape with the powerful geometric active model proposed by Chan and Vese, the improved geometric active model can retain all the advantage of the Chan-Vese model and can detect face contours in images with complex backgrounds accurately even if the image is noisy. Moreover, by implementing the new model in a variational level set framework, automatic topological changes of the model can be achieved naturally and the transformation parameters that map the face boundary to the prior shape can be roughly estimated simultaneously. The experimental results show our procedure to be eiTicient.

  17. Automated Contour Detection for Intravascular Ultrasound Image Sequences Based on Fast Active Contour Algorithm

    Institute of Scientific and Technical Information of China (English)

    DONG Hai-yan; WANG Hui-nan

    2006-01-01

    Intravascular ultrasound can provide high-resolution real-time crosssectional images about lumen, plaque and tissue. Traditionally, the luminal border and medial-adventitial border are traced manually. This process is extremely timeconsuming and the subjective difference would be large. In this paper, a new automated contour detection method is introduced based on fast active contour model.Experimental results found that lumen and vessel area measurements after automated detection showed good agreement with manual tracings with high correlation coefficients (0.94 and 0.95, respectively) and small system difference ( -0.32 and 0.56, respectively). So it can be a reliable and accurate diagnostic tool.

  18. Measurement of Intraocular Pressure after LASIK by Dynamic Contour Tonometry

    Institute of Scientific and Technical Information of China (English)

    LIU Lei; LEI Cheng; LI Xinyu; Dong Jieyu

    2006-01-01

    Changes of corneal properties induced by laser in situ keratomileusis (LASIK) results in low inaccurate intraocular pressure (IOP) readings by Goldmann applanation tonometry (GAT).Before and after LASIK, the applied value of IOP, measured by dynamic contour tonometry (DCT)in comparison to GAT, was evaluated. Before and 1, 4 weeks after LASIK, the IOP in 30 cases (60 eyes) was measured by GAT and DCT respectively. The obtained results were statistically processed by SPSS11. 5 statistical software. The results showed that central corneal thickness (CCT)could affect GAT measurements but not DCT measurements. The comparison of IOP one and 4 weeks after LASIK revealed that the readings from GAT was separately decreased by 5.00±1.12 and 5.45±1. 13 mmHg as compared with those before LASIK, while those from DCT had no significant difference. It was concluded that LASIK-induced changes of CCT could influence the accuracy of GAT measurements, but had no influence on those from DCT. DCT was more beneficial to the measurements of IOP in normal eyes and those subject to LASIK surgery.

  19. After Surgery

    Science.gov (United States)

    ... side effects. There is usually some pain with surgery. There may also be swelling and soreness around ... the first few days, weeks, or months after surgery. Some other questions to ask are How long ...

  20. Turbinate surgery

    Science.gov (United States)

    Turbinectomy; Turbinoplasty; Turbinate reduction; Nasal airway surgery ... There are several types of turbinate surgery: Turbinectomy: All or part of the lower turbinate is taken out. This can be done in several different ways, but sometimes a ...

  1. What is in a contour map? A region-based logical formalization of contour semantics

    Science.gov (United States)

    Usery, E. Lynn; Hahmann, Torsten

    2015-01-01

    Contours maps (such as topographic maps) compress the information of a function over a two-dimensional area into a discrete set of closed lines that connect points of equal value (isolines), striking a fine balance between expressiveness and cognitive simplicity. They allow humans to perform many common sense reasoning tasks about the underlying function (e.g. elevation).

  2. Automatic Detection of Adenocarcinoma using Active Contours

    Directory of Open Access Journals (Sweden)

    NeelapalaAnilKumar

    2013-09-01

    Full Text Available CT scan is the one of the image representation for abdomen, where the tumour to be located and specified effectively with clarity, by the medical expert. This role can be hold by using one of the image processing techniques called segmentation. Image segmentation is the technique which isolates the image into different regions to simplify the image and identify the Tumour easily. Image segmentation has been extensively studied by various approaches. This work, focus on the one of the image segmentation technique with a new regularization term that yields an unsupervised segmentation model which identifies different Tumour locations in a given CT image. Active contours form a boundary around a particular part of the image based on an energy function. The energy function may include intensity values of pixels or gradient values. Chen-Vase method of active contour algorithm is adopted for image segmentation. The segmentation is done after properly masking of CT scan image. The cancer prone area is generalized prior to the masking of the image. Effected abdomen cancer can be identified for better analysis of medical experts using image processing MATLAB tools. This paper describes a new method to detect and extract the features in CT scan images, which shows good performance in detection of difficult features. And the developed technique makes use of major image processing methods and fundamentals to detect the cancer with minimum possible human interaction.

  3. Memory for pure tone sequences without contour.

    Science.gov (United States)

    Lefebvre, Christine; Jolicœur, Pierre

    2016-06-01

    We presented pure tones interspersed with white noise sounds to disrupt contour perception in an acoustic short-term memory (ASTM) experiment during which we recorded the electroencephalogram. The memory set consisted of seven stimuli, 0, 1, 2, 3, or 4 of which were to-be-remembered tones. We estimated each participant׳s capacity, K, for each set size and measured the amplitude of the SAN (sustained anterior negativity, an ERP related to acoustic short-term memory). We correlated their K slopes with their SAN amplitude slopes as a function of set size, and found a significant link between performance and the SAN: a larger increase in SAN amplitude was linked with a larger number of stimuli maintained in ASTM. The SAN decreased in amplitude in the later portion of the silent retention interval, but the correlation between the SAN and capacity remained strong. These results show the SAN is not an index of contour but rather an index of the maintenance of individual objects in STM. This article is part of a Special Issue entitled SI: Auditory working memory. PMID:26903419

  4. Is accommodation colorblind? Focusing chromatic contours.

    Science.gov (United States)

    Wolfe, J M; Owens, D A

    1981-01-01

    Two adjacent regions define an edge if they differ in either color or luminance. If the difference is purely chromatic, the edge is said to be isoluminant. Isoluminant contours are often perceptually unstable. Perhaps some of this instability could be explained if isoluminant contours were difficult to bring into focus. To test this hypothesis, a vernier optometer was used to measure the accuracy of steady-state accommodation for the vertical boundary of a red-green bipartite field. This edge was presented at optical distances of 0, 1.5, 3.0, and 4.5 diopters, with brightness contrasts between the two hemifields of 0% (isoluminant), 15%, 58%, and 100%. Accommodation was essentially unresponsiveness to the isoluminant edge and exhibited increasing focusing accuracy with increased brightness contrast. Control experiments replicated this finding for red-orange, green-blue, and white-white fields. These results imply that luminance contrast is a necessary stimulus for monocular accommodation. Inappropriate accommodation may be a factor contributing to the perceptual instability of isoluminant patterns. PMID:7255083

  5. Wound Image Analysis Using Contour Evolution

    Directory of Open Access Journals (Sweden)

    K. Sundeep Kumar

    2014-05-01

    Full Text Available The aim of the algorithm described in this paper is to segment wound images from the normal and classify them according to the types of the wound. The segmentation of wounds extravagates color representation, which has been followed by an algorithm of grayscale segmentation based on the stack mathematical approach. Accurate classification of wounds and analyzing wound healing process is a critical task for patient care and health cost reduction at hospital. The tissue uniformity and flatness leads to a simplified approach but requires multispectral imaging for enhanced wound delineation. Contour Evolution method which uses multispectral imaging replaces more complex tools such as, SVM supervised classification, as no training step is required. In Contour Evolution, classification can be done by clustering color information, with differential quantization algorithm, the color centroids of small squares taken from segmented part of the wound image in (C1,C2 plane. Where C1, C2 are two chrominance components. Wound healing is identified by measuring the size of the wound through various means like contact and noncontact methods of wound. The wound tissues proportion is also estimated by a qualitative visual assessment based on the red-yellow-black code. Moreover, involving all the spectral response of the tissue and not only RGB components provides a higher discrimination for separating healed epithelial tissue from granulation tissue.

  6. Imagem corporal, ansiedade e depressão em pacientes obesos submetidos à cirurgia bariátrica Body image, anxiety and depression in obese patients submitted to bariatric surgery

    Directory of Open Access Journals (Sweden)

    Sebastião Sousa Almeida

    2012-04-01

    Full Text Available Pacientes obesos mórbidos têm recorrido à cirurgia bariátrica como um recurso eficaz para perder peso. Entretanto, este procedimento pode causar alterações comportamentais significativas. O objetivo deste trabalho foi investigar os níveis de ansiedade e depressão, assim como as mudanças sofridas na percepção da imagem corporal em pacientes obesos submetidos à cirurgia bariátrica em três momentos: pré-operatório, 6 meses e 12 meses após a cirurgia. Trata-se de um estudo do tipo prospectivo longitudinal, de abordagem quantitativa. No estudo foram aplicados os Inventários de Depressão e Ansiedade de Beck e a Escala Brasileira de Figuras de Silhuetas para Adultos. A cirurgia diminuiu significativamente tanto o índice de massa corporal dos pacientes quanto a insatisfação com a sua imagem corporal. Essa perda de peso e diminuição da insatisfação com a imagem corporal foi acompanhada de redução nos níveis de ansiedade e depressão, o que sugere que estes são fatores importantes no quadro obesidade.Morbidly obese patients often have resorted to bariatric surgery as an effective resource to be used for weight loss. However, this procedure can cause significant behavioral changes. The objective of this study was to investigate levels of anxiety and depression, as well as the changes suffered in the perception of body image in obese patients undergoing bariatric surgery at three different times: preoperatively, 6 months and 12 months after surgery. This is a prospective longitudinal study of a quantitative approach. The study used the Beck Depression Inventory, the Beck Anxiety Inventory and the Brazilian Scale of Figures Silhouettes for Adults. Surgery significantly decreased both the body mass index of patients and dissatisfaction with their body image. This weight loss and decreased body image dissatisfaction was accompanied by reduced levels of anxiety and depression, suggesting that these are important factors in the

  7. Liver segmentation with new supervised method to create initial curve for active contour.

    Science.gov (United States)

    Zareei, Abouzar; Karimi, Abbas

    2016-08-01

    The liver performs a critical task in the human body; therefore, detecting liver diseases and preparing a robust plan for treating them are both crucial. Liver diseases kill nearly 25,000 Americans every year. A variety of image segmentation methods are available to determine the liver's position and to detect possible liver tumors. Among these is the Active Contour Model (ACM), a framework which has proven very sensitive to initial contour delineation and control parameters. In the proposed method based on image energy, we attempted to obtain an initial segmentation close to the liver's boundary, and then implemented an ACM to improve the initial segmentation. The ACM used in this work incorporates gradient vector flow (GVF) and balloon energy in order to overcome ACM limitations, such as local minima entrapment and initial contour dependency. Additionally, in order to adjust active contour control parameters, we applied a genetic algorithm to produce a proper parameter set close to the optimal solution. The pre-processing method has a better ability to segment the liver tissue during a short time with respect to other mentioned methods in this paper. The proposed method was performed using Sliver CT image datasets. The results show high accuracy, precision, sensitivity, specificity and low overlap error, MSD and runtime with few ACM iterations. PMID:27286186

  8. Lower face lifting and contouring with a novel internal real-time thermosensing monopolar radiofrequency.

    Science.gov (United States)

    Kim, Eun Jin; Kwon, Hyoung Il; Yeo, Un Cheol; Ko, Joo Yeon

    2016-09-01

    As demand for a youthful appearance has increased, various techniques for face lifting and contouring have been used to reduce excess fat deposition and improve skin laxity. Recently, radiofrequency (RF)-assisted lipolysis and liposuction (RFAL) has been introduced for body and face contouring. This study aimed to evaluate the clinical improvement and safety of a new RFAL device for face lifting and contouring. A prospective study was conducted in 20 Korean patients who underwent an internal real-time thermosensing monopolar RFAL procedure. Prior to treatment and 12 and 24 weeks after treatment, digital photographs were taken, and the degree of improvement as measured by investigators and patients was recorded. Skin elasticity was measured using a Cutometer (CT575, Courage and Khazaka®, Cologne, Germany). Safety profiles were also evaluated at each visit. Results showed favorable improvement in skin laxity and fat deposition. Both investigators' evaluations and patients' evaluation showed significant improvement between 12 and 24 weeks. Although the changes in skin elasticity measured by the Cutometer were not statistically significant, all three treated regions showed a trend toward improvement. No major side effects such as infection or burn were observed. The internal, real-time thermosensing monopolar RFAL device showed clinical efficacy and safety. After further studies with more patients and longer follow-up periods, internal real-time thermosensing monopolar RF devices might become one of the popular treatment options for face lifting and contouring. PMID:27389364

  9. Measuring multiple residual-stress components using the contour method and multiple cuts

    Energy Technology Data Exchange (ETDEWEB)

    Prime, Michael B [Los Alamos National Laboratory; Swenson, Hunter [Los Alamos National Laboratory; Pagliaro, Pierluigi [U. PALERMO; Zuccarello, Bernardo [U. PALERMO

    2009-01-01

    The conventional contour method determines one component of stress over the cross section of a part. The part is cut into two, the contour of the exposed surface is measured, and Bueckner's superposition principle is analytically applied to calculate stresses. In this paper, the contour method is extended to the measurement of multiple stress components by making multiple cuts with subsequent applications of superposition. The theory and limitations are described. The theory is experimentally tested on a 316L stainless steel disk with residual stresses induced by plastically indenting the central portion of the disk. The stress results are validated against independent measurements using neutron diffraction. The theory has implications beyond just multiple cuts. The contour method measurements and calculations for the first cut reveal how the residual stresses have changed throughout the part. Subsequent measurements of partially relaxed stresses by other techniques, such as laboratory x-rays, hole drilling, or neutron or synchrotron diffraction, can be superimposed back to the original state of the body.

  10. Heart Surgery Terms

    Science.gov (United States)

    ... Patients Choosing Wisely® Adult Cardiac Surgery What is Pediatric Heart Disease? What is Risk Adjustment? Valve Repair/Replacement Surgery Esophageal Surgery Lung/Thoracic Surgery Aneurysm Surgery Arrhythmia Surgery Other Types of Surgery Clinical ...

  11. A new algorithm of brain volume contours segmentation

    Institute of Scientific and Technical Information of China (English)

    吴建明; 施鹏飞

    2003-01-01

    This paper explores brain CT slices segmentation technique and some related problems, including contours segmentation algorithms, edge detector, algorithm evaluation and experimental results. This article describes a method for contour-based segmentation of anatomical structures in 3D medical data sets. With this method, the user manually traces one or more 2D contours of an anatomical structure of interest on parallel planes arbitrarily cutting the data set. The experimental results showes the segmentation based on 3D brain volume and 2D CT slices. The main creative contributions in this paper are: (1) contours segmentation algorithm; (2) edge detector; (3) algorithm evaluation.

  12. Predictive Modeling of Complex Contoured Composite Structures Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The existing HDWLT (pictured) contoured composite structure design, its analyses and manufacturing tools, will be used to validate key analyses inputs through...

  13. Probabilistic contour extraction based on shape prior model

    Institute of Scientific and Technical Information of China (English)

    FAN Xin; LIANG De-qun

    2005-01-01

    Statistical shape prior model is employed to construct the dynamics in probabilistic contour estimation.By applying principal component analysis,plausible shape samples are efficiently generated to predict contour samples.Based on the shape-dependent dynamics and probabilistic image model,a particle filter is used to estimate the contour with a specific shape.Compared with the deterministic approach with shape information,the proposed method is simple yet more effective in extracting contours from images with shape variations and occlusion.

  14. Contour plotting programs for printer and Calcomp plotter

    International Nuclear Information System (INIS)

    Contour plotting programs for plotting contour diagrams on printers or Calcomp plotters are described. The subroutines also exist in versions that are useful for the special application of finding minima and saddlepoints of nuclear potential energy surfaces generated by the subroutine PETR3 of another program package. For the general user, however, the most interesting aspect of the plotting package is probably the possibility of generating printer contour plots. The plotting of printer contour plots is a very fast and convenient way of displaying two-dimensional functions. 3 figures

  15. Matched-pair comparisons of stereotactic body radiotherapy (SBRT) versus surgery for the treatment of early stage non-small cell lung cancer: A systematic review and meta-analysis

    International Nuclear Information System (INIS)

    Purpose: A population-based matched-pair comparison was performed to compare the efficacy of stereotactic body radiotherapy (SBRT) versus surgery for early-stage non-small cell lung cancer (NSCLC). Methods: All the eligible studies were searched by PubMed, Medline, Embase, and the Cochrane Library. The meta-analysis was performed to compare odds ratios (OR) for overall survival (OS), cancer-specific survival (CSS), disease-free survival (DFS), local control (LC), and distant control (DC). Results: Six studies containing 864 matched patients were included in the meta-analysis. The surgery was associated with a better long-term OS in patients with early-stage NSCLC. The pooled OR and 95% confidence interval (CI) for 1-year, 3-year OS were 1.31 [0.90, 1.91] and 1.82 [1.38, 2.40], respectively. However, the difference in 1-year and 3-year CSS, DFS, LC and DC was not significant. Conclusions: This systematic review found a superior 3-year OS after surgery compared with SBRT, which supports the need to compare both treatments in large prospective, randomized, controlled clinical trials

  16. Evaluation of contour of unruptured cerebral aneurysm using three-dimensional CT cisternogram.

    Directory of Open Access Journals (Sweden)

    Onoda K

    2004-06-01

    Full Text Available Angiography is gold standard technique as preoperative examination for unruptured aneurysmal surgery. Neurosurgeons have observed the unexpected irregular shape and size of the aneurysmal dome and neck in many cases of unruptured cerebral aneurysms during aneurysmal microsurgery, and known the discrepancy between the findings of angiography and operative view. We could not find out the report described the preoperative evaluation of outer-wall (contour of aneurysm. In the present study, we attempted to evaluate the outer-wall of an unruptured cerebral aneurysm using three-dimensional CT cisternogram (3D-CTC to provide useful preoperative information. The study was performed on three cases of unruptured cerebral aneurysm that were identified incidentally by MR angiography. We performed three-dimensional CT aniography (3D-CTA and 3D-CTC for each patient. In the present study, we visualized the contours of vessels and aneurysms using a 3D-CTC in three cases of unruptured cerebral aneurysm. We found the discrepancy between the 3D-CTC contour image and the intra-luminal image 3D-CTA image. This method may be useful for the decision of the surgical approach and have the potential to evaluate the anatomical structure of aneurysmal dome and neck preoperatively.

  17. Understanding physiological and degenerative natural vision mechanisms to define contrast and contour operators.

    Directory of Open Access Journals (Sweden)

    Jacques Demongeot

    Full Text Available BACKGROUND: Dynamical systems like neural networks based on lateral inhibition have a large field of applications in image processing, robotics and morphogenesis modeling. In this paper, we will propose some examples of dynamical flows used in image contrasting and contouring. METHODOLOGY: First we present the physiological basis of the retina function by showing the role of the lateral inhibition in the optical illusions and pathologic processes generation. Then, based on these biological considerations about the real vision mechanisms, we study an enhancement method for contrasting medical images, using either a discrete neural network approach, or its continuous version, i.e. a non-isotropic diffusion reaction partial differential system. Following this, we introduce other continuous operators based on similar biomimetic approaches: a chemotactic contrasting method, a viability contouring algorithm and an attentional focus operator. Then, we introduce the new notion of mixed potential Hamiltonian flows; we compare it with the watershed method and we use it for contouring. CONCLUSIONS: We conclude by showing the utility of these biomimetic methods with some examples of application in medical imaging and computed assisted surgery.

  18. Generation and generalization of safe depth-contours for hydrographc charts using a surface-based approach

    NARCIS (Netherlands)

    Peters, R.Y.; Ledoux, H.; Meijers, B.M.

    2013-01-01

    Depth-contours are an essential part of any hydrographic chart|a map of a water-body intended for safe ship navigation. Traditionally these were manually drawn by skilled hydrographers from a limited set of surveyed depth measurements. Nowadays this process of map making is shifted towards the digit

  19. India-Pakistan: Contours of Relationship

    Directory of Open Access Journals (Sweden)

    Devika Mittal

    2016-06-01

    Full Text Available Even after about 70 years of separation, India and Pakistan continue to live in the prison of the past. The rhetoric of partition is still alive in the memory of the people of both the countries. They have constructed fixed, unchanging and competing images for each other. While Pakistan became an Islamic Republic, India adopted secularism, thereby, negating the two-nation theory. The ‘differences’ along with memories of partition has made Indian and Pakistani to remain in permanent hostile situation. The leaders of the two countries try to settle their disputes but fails because of lack of support from their social and political institutions. Since its coming into power in 2014, the NDA government under the Indian Prime Minister, Mr. Narendra Modi has managed to engage the Pakistani establishment, despite many problems between the two countries. This article tries to highlight upon the contours of relationships post-2014.

  20. Automatic Contour Extraction from 2D Image

    Directory of Open Access Journals (Sweden)

    Panagiotis GIOANNIS

    2011-03-01

    Full Text Available Aim: To develop a method for automatic contour extraction from a 2D image. Material and Method: The method is divided in two basic parts where the user initially chooses the starting point and the threshold. Finally the method is applied to computed tomography of bone images. Results: An interesting method is developed which can lead to a successful boundary extraction of 2D images. Specifically data extracted from a computed tomography images can be used for 2D bone reconstruction. Conclusions: We believe that such an algorithm or part of it can be applied on several other applications for shape feature extraction in medical image analysis and generally at computer graphics.

  1. Radiofrequency-assisted Liposuction for Neck and Lower Face Adipodermal Remodeling and Contouring

    Science.gov (United States)

    Keramidas, Evangelos

    2016-01-01

    Background: The purpose of this study is to report our experience using radiofrequency-assisted liposuction (RFAL) for neck and face contouring. This article details the operative technique, selection, complications, third-party surgeon appraisal, and patient satisfaction survey. Methods: From November 2009 to November 2013, 55 patients who underwent RFAL treatment were enrolled in the study. Postoperative patient satisfaction surveys were conducted, and 2 independent plastic surgeons evaluated contour and skin quality with randomized preoperative and postoperative photographs at 6 months postoperatively. The different parameters recorded involved age, sex, weight, body mass index, operative time, amount of fat aspirated and energy delivered, complications, and aesthetic outcome in 1 and 4 weeks and 3 and 6 months. Our longest follow-up was 4 years. Patients were asked 6 months postoperatively to grade their satisfaction as poor, no change, moderate, good, and excellent. Results: The mean age was 51 years (range, 35–61 years), and the mean amount of fat aspirated was 30 mL (range, 10–200 mL). Five out of 55 patients (9.1%) developed tissue hardness that resolved with massage. All patients were followed up for a minimum of 6 months. Eighty-five percent of patients were satisfied with their contouring result and degree of skin tightening (48/55 patients). Two independent plastic surgeons considered the improvement in contouring and degree of skin tightening good to excellent in 52 of 55 cases. Conclusions: In appropriately selected patients, RFAL neck and face contouring represent a safe procedure to achieve significant improvement of the skin laxity and fat deposits of the cervicomental zone and jowls. PMID:27622118

  2. What to Expect during Heart Surgery

    Science.gov (United States)

    ... product) from your blood, add oxygen to your blood, and then pump the blood back into your body. Your surgeon ... work on it. Your heart will continue to pump blood to your body. Minimally Invasive Heart Surgery For ...

  3. Contour integration and segmentation with a new lateral connections model

    Science.gov (United States)

    Cai, Chao

    2011-11-01

    Automatically target contour detection from cluttered scenes is a very difficult task for computer vision. Humans, however, have a much better background suppress ability. The preceding models could not implement such a task very well. In this letter, an effective contour integration method based on human visual perception mechanism is proposed. The algorithm combines the properties of primary visual cortex and psychology researching results to simulate the contour perception of the V1 cortex. The new lateral connection based computational model have a better texture suppress ability, while, target's contour is enhanced. Compared with traditional methods, experiments show that the new method implement a more reasonable simulation of the V1 function structure, availably enhance the target's contour while suppress the cluttered background, obtain a balance between over and lose detection, besides, it has better accuracy with less computational complexity and time-consuming.

  4. Contour-Based Surface Reconstruction using MPU Implicit Models.

    Science.gov (United States)

    Braude, Ilya; Marker, Jeffrey; Museth, Ken; Nissanov, Jonathan; Breen, David

    2007-03-01

    This paper presents a technique for creating a smooth, closed surface from a set of 2D contours, which have been extracted from a 3D scan. The technique interprets the pixels that make up the contours as points in ℝ(3) and employs Multi-level Partition of Unity (MPU) implicit models to create a surface that approximately fits to the 3D points. Since MPU implicit models additionally require surface normal information at each point, an algorithm that estimates normals from the contour data is also described. Contour data frequently contains noise from the scanning and delineation process. MPU implicit models provide a superior approach to the problem of contour-based surface reconstruction, especially in the presence of noise, because they are based on adaptive implicit functions that locally approximate the points within a controllable error bound. We demonstrate the effectiveness of our technique with a number of example datasets, providing images and error statistics generated from our results.

  5. Target Contour Recovering for Tracking People in Complex Environments

    Directory of Open Access Journals (Sweden)

    Jianhua Zhang

    2012-01-01

    Full Text Available Recovering people contours from partial occlusion is a challenging problem in a visual tracking system. Partial occlusions would bring about unreasonable contour changes of the target object. In this paper, a novel method is presented to detect partial occlusion on people contours and recover occluded portions. Unlike other occlusion detection methods, the proposed method is only based on contours, which makes itself more flexible to be extended for further applications. Experiments with synthetic images demonstrate the accuracy of the method for detecting partial occlusions, and experiments on real-world video sequence are also carried out to prove that the method is also good enough to be used to recover target contours.

  6. Strabismus Surgery

    Science.gov (United States)

    ... used. Some surgeons prescribe an antibiotic or combination antibiotic/steroid drop or ointment after surgery. More technical ... Screening Recommendations Loading... Most Common Searches Adult ...

  7. Corrective Jaw Surgery

    Science.gov (United States)

    ... out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment of ... out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment of ...

  8. Applications of navigation for orthognathic surgery.

    Science.gov (United States)

    Bobek, Samuel L

    2014-11-01

    Stereotactic surgical navigation has been used in oral and maxillofacial surgery for orbital reconstruction, reduction of facial fractures, localization of foreign bodies, placement of implants, skull base surgery, tumor removal, temporomandibular joint surgery, and orthognathic surgery. The primary goals in adopting intraoperative navigation into these different surgeries were to define and localize operative anatomy, to localize implant position, and to orient the surgical wound. Navigation can optimize the functional and esthetic outcomes in patients with dentofacial deformities by identifying pertinent anatomic structures, transferring the surgical plan to the patient, and verifying the surgical result. This article discusses the principles of navigation-guided orthognathic surgery.

  9. CT-guided stereotactic brain surgery

    International Nuclear Information System (INIS)

    An apparatus for stereotactic brain surgery combined with a whole-body CT scanner, by which surgery can be performed by CT scanning, was developed. This apparatus and an Archimedes screw were clinically applied to surgery for removal of deep-seated intracranial hematomas, and satisfactory results were obtained. An outline of this apparatus is given, and combined use of the apparatus and the Secta type of ultrasound apparatus for monitoring surgery is described. (Namekawa, K.)

  10. Imagem corporal e características de personalidade de mulheres solicitantes de cirurgia plástica estética Body image and personality traits of women seeking aesthetic plastic surgery

    Directory of Open Access Journals (Sweden)

    Ana Beatriz Sante

    2011-01-01

    Full Text Available As motivações psíquicas associadas à crescente busca de Cirurgia Plástica Estética (CPE têm sido pesqui-sadas, porém sem resultados conclusivos. Assim, objetivou-se investigar características de personalidade e imagem corporal de mulheres que buscam CPE, avaliando-se, individualmente, 37 mulheres solicitantes de mamoplastia adicional e/ou lipoaspiração (Grupo 1 e 41 mulheres sem procura de CPE (Grupo 2, pela Escala de Satisfação com Imagem Corporal (ESIC e pelas Escalas de Personalidade de Comrey (CPS. Comparando-se seus resultados (Student t-test, p Internal motivations associated with the increasing search for Aesthetic Plastic Surgery (APS have been previously investigated without conclusive results. Our objective was to investigate personality traits and body image satisfaction of women seeking APS by individual evaluation of 37 women interested in breast augmentation (mammoplasty and/or liposuction (Group 1, and 41 women not seeking APS (Group 2. It was applied the Body Image Satisfaction Scale (BISS and Comrey Personality Scales (CPS. Statistical analysis (Student t-test, p < .05 has shown significant difference between groups for Factor 1 (satisfaction with self appearance of BISS as well as for CPS T (Confidence vs. Defensive Attitude and M (Mascu-linity vs. Femininity scales. It suggests that women in G1 are less satisfied with their body image, have increased defensive attitude and greater affective sensibility.

  11. Surgical treatment and non-surgical treatment of body image disturbance in patients seeking cosmetic surgery%美容就医者体象障碍的手术与非手术治疗

    Institute of Scientific and Technical Information of China (English)

    刘菡; 图雅

    2012-01-01

    The trealmenl of body image disturbance in palienls seeking cosmelic surgery was divided inlo surgical trealmenl and non-surgical trealmenl. Different ways and means resulted in different curative effects in clinical. Based on the research of pathology, treatment ways and curative effects about body image disturbance, this article summarized the application of surgical and non-surgical treatments in body image disturbance, and also overviewed the effects and the key elements during the treatments.%美容就医者体象障碍的治疗可分为手术治疗和非手术治疗两大类,其治疗方式及治疗方法的组合在临床上各有不同的治疗效果.在对美容就医者体象障碍的病理、治疗方式及效果研究的基础上,文章概述了美容就医者体象障碍的手术治疗与非手术治疗的应用、效果及在治疗中的关键要素等.

  12. Pre-surgery localization of non-palpable lesions of the breast using a 1.0 Tesla MRI system and a body coil

    International Nuclear Information System (INIS)

    The purpose of the study was to verify whether examination with a non-dedicated MRI body coil, i.e. without complementing electronic hardware, will reliably locate the lesion revealed by the MR-mammography. The idea was that if the results obtained were equal in value, a less expensive alternative for tumor localization might have been found. Material and methods: In 18 patients we performed a contrast enhanced (i.v. 0.2 mmol Gd-DTPA/kg b.w.) breast MRI on a 1.0 Tesla system (Magnetom Impact, Siemens, Erlangen, Germany) using a body coil and a GRE 3D sequence. In prone position, the patients were placed in a customized positioning device offering lateral access to the breast. The localizations were done with a MRI-compatible wire (n=21). In addition, all patients underwent the same imaging protocol using a dedicated breast coil (without localization). For both MRI modalities, the signal intensities of the lesion, the normal breast tissue, and the background noise were measured. The lesion-to-fat contrast (LFC), the lesion-to-breast tissue contrast (LCB) and the percentage of signal change pre- and post-contrast administration were calculated and compared. The localization results were correlated to pathologic findings. Results: There was no difference in lesion detection. Regarding the LCF and LBC, the body coil was superior to the dedicated breast coil. However, the background noise was higher using the body coil. In all cases the localization was successful. (orig./CB)

  13. Throat Foreign Body Removal Surgery in 826 Cases under Video Laryngoscope of Straight Pipe%直管电子喉镜下咽喉异物取出术826例临床分析

    Institute of Scientific and Technical Information of China (English)

    杨晓红; 倪宝良; 钮燕; 师克忠

    2011-01-01

    目的 探讨直管电子喉镜下钳取咽喉异物的应用价值.方法 回顾性分析利用storz直管电子喉镜经口进路对门诊咽喉部异物及怀疑有咽喉部异物患者826例的临床资料.结果 826例患者中802例发现有异物,并在镜下成功取出;24例未见异物的检查结果为咽喉部粘膜充血或粘膜溃疡,其中有7例见小血肿形成,经抗炎治疗1周后异物感症状消失,复查均未见异物遗留.结论 经口进路在直管电子喉镜下探查或取出咽喉部异物具有成功率高、视野清晰、安全准确、病人痛苦少、简便快捷、无创等优点,值得推广应用.%Objective To investigate the application value of the throat foreign body removal with forcep under the video laryngoscope of straight pipe. Method We retrospectively analyzed the clinical data of 826 patients with confirmed or suspected throat foreign bodies who received removal surgery throat foreign bodies under storz video laryngoscope of straight pipe through the mouth. Results Among 826 patients, throat foreign bodies were found in 802 patients and and successfully removed under the video laryngoscope of straight pipe; no foreign bodies except throat mucosal congestion or mucous membrane ulcers were found in 24 patients, including 7 patients with small hematoma. A week later the foreign body sensation of symptoms disappeared by anti-inflammatory treatment. Review showed no foreign body left behind in the throat. Conclusions Exploration or removal of throat foreign bodies under video laryngoscope of straight pipe through oral route has many advantages such as high success rate, clear vision, ecurity, accuracy, less pain, easy and noninvasive operation. This technology should be widely applied.

  14. Material properties from contours: New insights on object perception.

    Science.gov (United States)

    Pinna, Baingio; Deiana, Katia

    2015-10-01

    In this work we explored phenomenologically the visual complexity of the material attributes on the basis of the contours that define the boundaries of a visual object. The starting point is the rich and pioneering work done by Gestalt psychologists and, more in detail, by Rubin, who first demonstrated that contours contain most of the information related to object perception, like the shape, the color and the depth. In fact, by investigating simple conditions like those used by Gestalt psychologists, mostly consisting of contours only, we demonstrated that the phenomenal complexity of the material attributes emerges through appropriate manipulation of the contours. A phenomenological approach, analogous to the one used by Gestalt psychologists, was used to answer the following questions. What are contours? Which attributes can be phenomenally defined by contours? Are material properties determined only by contours? What is the visual syntactic organization of object attributes? The results of this work support the idea of a visual syntactic organization as a new kind of object formation process useful to understand the language of vision that creates well-formed attribute organizations. The syntax of visual attributes can be considered as a new way to investigate the modular coding and, more generally, the binding among attributes, i.e., the issue of how the brain represents the pairing of shape and material properties. PMID:26072333

  15. The contour method: a new approach in experimental mechanics

    Energy Technology Data Exchange (ETDEWEB)

    Prime, Michael B [Los Alamos National Laboratory

    2009-01-01

    The recently developed contour method can measure complex residual-stress maps in situations where other measurement methods cannot. This talk first describes the principle of the contour method. A part is cut in two using a precise and low-stress cutting technique such as electric discharge machining. The contour of the resulting new surface, which will not be flat if residual stresses are relaxed by the cutting, is then measured. Finally, a conceptually simple finite element analysis determines the original residual stresses from the measured contour. Next, this talk gives several examples of applications. The method is validated by comparing with neutron diffraction measurements in an indented steel disk and in a friction stir weld between dissimilar aluminum alloys. Several applications are shown that demonstrate the power of the contour method: large aluminum forgings, railroad rails, and welds. Finally, this talk discusses why the contour method is significant departure from conventional experimental mechanics. Other relaxation method, for example hole-drilling, can only measure a 1-D profile of residual stresses, and yet they require a complicated inverse calculation to determine the stresses from the strain data. The contour method gives a 2-D stress map over a full cross-section, yet a direct calculation is all that is needed to reduce the data. The reason for these advantages lies in a subtle but fundamental departure from conventional experimental mechanics. Applying new technology to old methods like will not give similar advances, but the new approach also introduces new errors.

  16. A fast quantum mechanics based contour extraction algorithm

    Science.gov (United States)

    Lan, Tian; Sun, Yangguang; Ding, Mingyue

    2009-02-01

    A fast algorithm was proposed to decrease the computational cost of the contour extraction approach based on quantum mechanics. The contour extraction approach based on quantum mechanics is a novel method proposed recently by us, which will be presented on the same conference by another paper of us titled "a statistical approach to contour extraction based on quantum mechanics". In our approach, contour extraction was modeled as the locus of a moving particle described by quantum mechanics, which is obtained by the most probable locus of the particle simulated in a large number of iterations. In quantum mechanics, the probability that a particle appears at a point is equivalent to the square amplitude of the wave function. Furthermore, the expression of the wave function can be derived from digital images, making the probability of the locus of a particle available. We employed the Markov Chain Monte Carlo (MCMC) method to estimate the square amplitude of the wave function. Finally, our fast quantum mechanics based contour extraction algorithm (referred as our fast algorithm hereafter) was evaluated by a number of different images including synthetic and medical images. It was demonstrated that our fast algorithm can achieve significant improvements in accuracy and robustness compared with the well-known state-of-the-art contour extraction techniques and dramatic reduction of time complexity compared to the statistical approach to contour extraction based on quantum mechanics.

  17. 体象障碍患者对美容手术的满意度调查%Investigation of satisfactory rate in patients with body dysmorphic disorder after cosmetic surgery

    Institute of Scientific and Technical Information of China (English)

    杨冠华; 罗跃嘉; 杜太超; 雷全友; 解永学

    2008-01-01

    Objective To explore the satisfactory rate in patients with body dysmorphic disorder(BDD)after cosmetic surgery.Methods We designed a questionnaire to investigate the postoperative satisfactory rate in patients with BDD and without BDD.Results There Was significant difference in postoperative satisfactory rate between patients with BDD and without BDD.Conclusion The patients with BDD have a lower satisfactory rate,which is even worse after repeated surgery.%目的 观察体象障碍患者在整形手术中的一般情况及其对手术的满意程度.方法 采用自制问卷调查21名体象障碍组和对照组对手术的满意程度及体象障碍组对两次手术的满意程度.结果 体象障碍组和对照组在手术满意度上有显著差异,体象障碍组的第1次与第2次手术的满意度有显著差异.结论 体象障碍患者对手术的满意程度较低,反复的手术导致更低的满意程度.

  18. Adaptive Contour Model for Real-Time Foreground Detection

    Institute of Scientific and Technical Information of China (English)

    HUANG Ying; DING Xiaoqing

    2005-01-01

    A multiscale foreground detection method was developed to segment moving objects from a stationary background. The algorithm is based on a fixed-mesh-based contour model, which starts at the bounding box of the difference map between an input image and its background and ends at a final contour. An adaptive algorithm was developed to calculate an appropriate energy threshold to control the contours to identify the foreground silhouettes. Experiments show that this method more successfully ignores the negative influence of image noise to obtain an accurate foreground map than other foreground detection algorithms. Most shadow pixels are also eliminated by this method.

  19. Contour tracking and corner detection in a logic programming environment

    DEFF Research Database (Denmark)

    Bell, Benjamin; Pau, L. F.

    1990-01-01

    The added functionality such as contour tracking and corner detection which logic programming lends to standard image operators is described. An environment for implementing low-level imaging operations with Prolog predicates is considered. Within this environment, higher-level image predicates...... (contour tracking and corner detection) are constructed. The emphasis is not on building better corner detectors, but on presenting ways of using the unification and backtracking features of logic programming for these tasks. The performance of this implementation of contour tracking and corner detection...

  20. Body Mass Index Is a Marker of Nutrition Preparation Sufficiency Before Surgery for Crohn's Disease From the Perspective of Intra-Abdominal Septic Complications

    OpenAIRE

    Min ZHANG; Gao, Xiang; Chen, Yuanhan; Zhi, Min; Chen, Huangwei; Tang, Jian; Su, Minli; Yao, Jiayin; Yang, Qingfan; Chen, Junrong; Hu, Pinjin; Liu, Huanliang

    2015-01-01

    Abstract Poor preoperative nutritional status for individuals with Crohn's disease (CD) is associated with intra-abdominal septic complications (IASCs). The present study aimed to investigate the association of the common nutrition indices serum albumin and body mass index (BMI) with IASCs. Sixty-four CD patients who had received elective intestinal operations were retrospectively investigated. Among these patients, 32 had received individualized fortified nutrition support. IASCs occurred in...

  1. Prevalence of Body Dysmorphic Disorder in a Cosmetic Plastic Surgery Department in Nanjing%躯体变形障碍在南京市某美容整形科的患病率调查

    Institute of Scientific and Technical Information of China (English)

    郑铮; 张宁

    2012-01-01

    To explore the prevalence of body dysmorphic disorder in an aesthetic and plastic surgery department in Nanjing, a total of 218 participants were enrolled in the study by systematic sampling. They were measured and interviewed with BDDQ Chinese version and SCID— I /P. The prevalence of body dysmorphic disorder was 10. 55%. The prevalence in females was 10. 00% and in males was 11. 36%. Therefore, the prevalence of body dysmorphic disorder in the aesthetic and plastic surgery department was rather high and there's no significant difference in different genders or ages.%为了解躯体变形障碍在国内美容整形科的患病率,采取等距骂样的方法,选取2006年6月~9月期间求诊于江苏省南京市某三甲医院美容整形科的求术者218人,采用躯体变形障碍问卷(body dysmorphic disorder questionnaire,BDDQ)中文版与DSM-Ⅳ-TR轴Ⅰ障碍定式临床检查病人版(s1ructured clinical interview for DSM-Ⅳ-TRaxis Ⅰ disorders,SCID-Ⅰ/P)进行调查与临床访谈.结果显示,218名求术者中,23人(10.55%)符合躯体变形障碍的诊断;130名女性求术者中,13 人(10.00%)符合躯体变形障碍的诊断;88名男性求术者中,10人(11.36%)符合躯体变形障碍的诊断;不同性别求术者的患病率不存在显著性差异(x2=0.10,P>0.05);不同年龄段求术者的患病率不存在显著性差异(x2=5.59,P>0.05).因此,躯体变形障碍在美容整形科的患病率较高且患病率不存在性别及年龄差异.

  2. Details of Side Load Test Data and Analysis for a Truncated Ideal Contour Nozzle and a Parabolic Contour Nozzle

    Science.gov (United States)

    Ruf, Joseph H.; McDaniels, David M.; Brown, Andrew M.

    2010-01-01

    Two cold flow subscale nozzles were tested for side load characteristics during simulated nozzle start transients. The two test article contours were a truncated ideal and a parabolic. The current paper is an extension of a 2009 AIAA JPC paper on the test results for the same two nozzle test articles. The side load moments were measured with the strain tube approach in MSFC s Nozzle Test Facility. The processing techniques implemented to convert the strain gage signals into side load moment data are explained. Nozzle wall pressure profiles for separated nozzle flow at many NPRs are presented and discussed in detail. The effect of the test cell diffuser inlet on the parabolic nozzle s wall pressure profiles for separated flow is shown. The maximum measured side load moments for the two contours are compared. The truncated ideal contour s peak side load moment was 45% of that of the parabolic contour. The calculated side load moments, via mean-plus-three-standard-deviations at each nozzle pressure ratio, reproduced the characteristics and absolute values of measured maximums for both contours. The effect of facility vibration on the measured side load moments is quantified and the effect on uncertainty is calculated. The nozzle contour designs are discussed and the impact of a minor fabrication flaw in the nozzle contours is explained.

  3. Body Matters: Narratives of the Body

    OpenAIRE

    Asandi, Iren; Filipovska, Kalina; Neault, Megan; Olsen, Sara Høier

    2014-01-01

    This project engages the notion of the subjective body in a pasture of social constructions in order to gather an understanding of the narratives created by women about their bodies in relation to cosmetic surgery. The empirical data for this project comes from our virtual ethnographic research on the various forums from the MyLooks website. Moreover, perspectives regarding the body, beauty ideals and theoretical positions from Kathryn Morgan and Kathy Davis fill out the structure of the proj...

  4. Shape reconstruction from apparent contours theory and algorithms

    CERN Document Server

    Bellettini, Giovanni; Paolini, Maurizio

    2015-01-01

    Motivated by a variational model concerning the depth of the objects in a picture and the problem of hidden and illusory contours, this book investigates one of the central problems of computer vision: the topological and algorithmic reconstruction of a smooth three dimensional scene starting from the visible part of an apparent contour. The authors focus their attention on the manipulation of apparent contours using a finite set of elementary moves, which correspond to diffeomorphic deformations of three dimensional scenes. A large part of the book is devoted to the algorithmic part, with implementations, experiments, and computed examples. The book is intended also as a user's guide to the software code appcontour, written for the manipulation of apparent contours and their invariants. This book is addressed to theoretical and applied scientists working in the field of mathematical models of image segmentation.

  5. Bathymetric Contours for Prairie Rose Lake, Shelby County, Iowa

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digital bathymetry contours for Prairie Rose Lake in Shelby Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of...

  6. Bathymetric Contours for Lake Minnewashta, Dickinson County, Iowa

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digital bathymetry contours for Lake Minnewashta in Dickinson Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of Lake...

  7. Bathymetric Contours for Littlefield Lake, Audubon County, Iowa

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digital bathymetry contours for Littlefield Lake in Audubon Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of...

  8. Bathymetric Contours for Nine Eagles Lake, Decatur County, Iowa

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digital bathymetry contours for Nine Eagles Lake in Decatur Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of Nine...

  9. Bathymetric Contours for Lake Darling, Washington County, Iowa

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digital bathymetry contours for Lake Darling in Washington Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of Lake...

  10. Bathymetric Contours for Upper Gar Lake, Dickinson County, Iowa

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of digital bathymetry contours for Upper Gar Lake in Dickinson Co., Iowa. The U.S. Geological Survey conducted a bathymetric survey of Upper...

  11. Extended Active Contour Algorithm Based on Color Variance

    Institute of Scientific and Technical Information of China (English)

    Seung-tae LEE; Young-jun HAN; Hern-soo HAHN

    2010-01-01

    General active contour algorithm,which uses the intensity of the image,has been used to actively segment chjects.Because the cbjects have a similar intensity but different colors,it is difficult to segment any object from the others.Moreover,this algorithm can only be used in the simple environment since it is very sensitive to noise.In order to solve these problems.This paper proposes an extended active contour algarithm based on a color variance.In complex images,the color variance energy as the image energy is introduced into the general active contour algorithm.Experimental results show that the proposed active contour algorithm is very effective in various environments.

  12. Contours--Offshore of Half Moon Bay, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Half Moon map area, California. The vector data file is...

  13. Automatic Contour Extraction from 2D Neuron Images

    CERN Document Server

    Leandro, J J G; Costa, L da F

    2008-01-01

    The current work describes a novel system devised for automatic contour extraction of 2D branching structures images obtained from 3D neurons. Most contour-based methods for neuronal cell shape analysis fall short of suitable representation of such cells because overlaps between neuronal processes prevent traditional contour following algorithms from entering the innermost cell regions. The herein-proposed framework is specifically aimed at the problem of contour following even in presence of multiple overlaps. First, the input image is preprocessed in order to obtain an 8-connected skeleton with one-pixel-wide branches, as well as a set of subtree seed pixels and critical regions (i.e., bifurcations and crossings). Next, for each subtree, the tracking algorithm iteratively labels all valid pixel branches, up to a critical region, where the algorithm determines the suitable direction to proceed. Our algorithm has been found to exhibit robustness even for images with close parallel segments. Experimental resul...

  14. Transgressive Contours--Salt Point to Drakes Bay, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the transgressive contours for the Salt Point to Drakes Bay, California, region. The vector file is included in...

  15. Contours--Offshore of Salt Point Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Salt Point map area, California. The vector data file is...

  16. Transgressive Contours--Pigeon Point to South Monterey Bay, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the transgressive contours for the Pigeon Point to South Monterey Bay, California, region. The vector file is included in...

  17. Contours Offshore of Point Reyes Map Map Area, California

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This part of DS 781 presents data for the bathymetric contours for several seafloor maps of the Offshore of Point Reyes map area, California. The vector data file...

  18. Rhabdomyosarcoma: Surgery

    Science.gov (United States)

    ... plastic surgeons, maxillofacial surgeons, and neurosurgeons. If a tumor is large or is in a spot where removing it completely would severely affect the child’s appearance or cause other problems, then surgery may be ...

  19. Brain surgery

    Science.gov (United States)

    Craniotomy; Surgery - brain; Neurosurgery; Craniectomy; Stereotactic craniotomy; Stereotactic brain biopsy; Endoscopic craniotomy ... cut depends on where the problem in the brain is located. The surgeon creates a hole in ...

  20. Oesophageal surgery

    Institute of Scientific and Technical Information of China (English)

    Erik J. Simchuk; Derek Alderson

    2001-01-01

    @@INTRODUCTION The origins of oesophageal surgery ,like most surgical treatments ,are based in the treatment of traumatic injury .The Smith Surgical Papyrus describes the examination, diagnosis and treatment of "a gaping wound of throat, penetrating the gullet" [1].

  1. Acne Surgery

    OpenAIRE

    Dilworth, G. R.

    1983-01-01

    Acne surgery consists of comedone extraction of non-inflamed lesions, triamcinolone acetate injections of some inflamed lesions, and extraction of milia. Prevention is a very important part of comedone treatment, especially avoidance of picking, moisturizers and harsh soaps. Instruments are also very important: even the finest may be too thick and may have to be filed down. Acne surgery is only an adjunct of good medical therapy.

  2. Contour tracking and corner detection in a logic programming environment

    OpenAIRE

    Bell, Benjamin; Pau, L. F.

    1990-01-01

    The added functionality such as contour tracking and corner detection which logic programming lends to standard image operators is described. An environment for implementing low-level imaging operations with Prolog predicates is considered. Within this environment, higher-level image predicates (contour tracking and corner detection) are constructed. The emphasis is not on building better corner detectors, but on presenting ways of using the unification and backtracking features of logic prog...

  3. Auto-propagation of contours for adaptive prostate radiation therapy

    International Nuclear Information System (INIS)

    The purpose of this work is to develop an effective technique to automatically propagate contours from planning CT to cone beam CT (CBCT) to facilitate CBCT-guided prostate adaptive radiation therapy. Different from other disease sites, such as the lungs, the contour mapping here is complicated by two factors: (i) the physical one-to-one correspondence may not exist due to the insertion or removal of some image contents within the region of interest (ROI); and (ii) reduced contrast to noise ratio of the CBCT images due to increased scatter. To overcome these issues, we investigate a strategy of excluding the regions with variable contents by a careful design of a narrow shell signifying the contour of an ROI. For rectum, for example, a narrow shell with the delineated contours as its interior surface was constructed to avoid the adverse influence of the day-to-day content change inside the rectum on the contour mapping. The corresponding contours in the CBCT were found by warping the narrow shell through the use of BSpline deformable model. Both digital phantom experiments and clinical case testing were carried out to validate the proposed ROI mapping method. It was found that the approach was able to reliably warp the constructed narrow band with an accuracy better than 1.3 mm. For all five clinical cases enrolled in this study, the method yielded satisfactory results even when there were significant rectal content changes between the planning CT and CBCT scans. The overlapped area of the auto-mapped contours over 90% to the manually drawn contours is readily achievable. The proposed approach permits us to take advantage of the regional calculation algorithm yet avoiding the nuisance of rectum/bladder filling and provide a useful tool for adaptive radiotherapy of prostate in the future

  4. Contour tracking control for the REMUS autonomous underwater vehicle

    OpenAIRE

    Van Reet, Alan R.

    2005-01-01

    In the interest of enhancing the capabilities of autonomous underwater vehicles US Naval Operations, controlling vehicle position to follow depth contours presents exciting potential for navigation. Use of a contour tracking control algorithm in lieu of preprogrammed waypoint navigation offers distinct advantages within new challenges. The difficult nature of this problem lies in the non-trivial connection between the necessary corrective action and the feedback error used in traditional co...

  5. Melodic Contour Identification Reflects the Cognitive Threshold of Aging

    OpenAIRE

    Jeong, Eunju; Ryu, Hokyoung

    2016-01-01

    Cognitive decline is a natural phenomenon of aging. Although there exists a consensus that sensitivity to acoustic features of music is associated with such decline, no solid evidence has yet shown that structural elements and contexts of music explain this loss of cognitive performance. This study examined the extent and the type of cognitive decline that is related to the contour identification task (CIT) using tones with different pitches (i.e., melodic contours). Both younger and older ad...

  6. Projection lithography with distortion compensation using reticle chuck contouring

    Science.gov (United States)

    Tichenor, Daniel A.

    2001-01-01

    A chuck for holding a reflective reticle where the chuck has an insulator block with a non-planer surface contoured to cause distortion correction of EUV radiation is provided. Upon being placed on the chuck, a thin, pliable reflective reticle will conform to the contour of the chuck's non-planer surface. When employed in a scanning photolithography system, distortion in the scanned direction is corrected.

  7. [Robotic surgery].

    Science.gov (United States)

    Moreno-Portillo, Mucio; Valenzuela-Salazar, Carlos; Quiroz-Guadarrama, César David; Pachecho-Gahbler, Carlos; Rojano-Rodríguez, Martín

    2014-12-01

    Medicine has experienced greater scientific and technological advances in the last 50 years than in the rest of human history. The article describes relevant events, revises concepts and advantages and clinical applications, summarizes published clinical results, and presents some personal reflections without giving dogmatic conclusions about robotic surgery. The Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) defines robotic surgery as a surgical procedure using technology to aid the interaction between surgeon and patient. The objective of the surgical robot is to correct human deficiencies and improve surgical skills. The capacity of repeating tasks with precision and reproducibility has been the base of the robot´s success. Robotic technology offers objective and measurable advantages: - Improving maneuverability and physical capacity during surgery. - Correcting bad postural habits and tremor. - Allowing depth perception (3D images). - Magnifying strength and movement limits. - Offering a platform for sensors, cameras, and instruments. Endoscopic surgery transformed conceptually the way of practicing surgery. Nevertheless in the last decade, robotic assisted surgery has become the next paradigm of our era. PMID:25643879

  8. A fast contour descriptor algorithm for supernova imageclassification

    Energy Technology Data Exchange (ETDEWEB)

    Aragon, Cecilia R.; Aragon, David Bradburn

    2006-07-16

    We describe a fast contour descriptor algorithm and its application to a distributed supernova detection system (the Nearby Supernova Factory) that processes 600,000 candidate objects in 80 GB of image data per night. Our shape-detection algorithm reduced the number of false positives generated by the supernova search pipeline by 41% while producing no measurable impact on running time. Fourier descriptors are an established method of numerically describing the shapes of object contours, but transform-based techniques are ordinarily avoided in this type of application due to their computational cost. We devised a fast contour descriptor implementation for supernova candidates that meets the tight processing budget of the application. Using the lowest-order descriptors (F{sub 1} and F{sub -1}) and the total variance in the contour, we obtain one feature representing the eccentricity of the object and another denoting its irregularity. Because the number of Fourier terms to be calculated is fixed and small, the algorithm runs in linear time, rather than the O(n log n) time of an FFT. Constraints on object size allow further optimizations so that the total cost of producing the required contour descriptors is about 4n addition/subtraction operations, where n is the length of the contour.

  9. Application Of Moire Contour Fringes To Study Nycticebus Coucany

    Science.gov (United States)

    Ren-xiang, Zhang; Ming, Lu; Zu-yun, Lan; Wen-ji, Qu

    1984-12-01

    In this paper we have studied the moire contour fringes of the skull and femur knee joint of Nycticebus coucany and obtained the following results: 1. The skull's value K is very useful for comparative study with the different kinds of Primate. 2. The moire contour fringes of the tibia facies of knee joint is convex on one side while the other side is concave. 3. At the same condition the grade of the first moire contour fringe of connection on the femur knee joint between the two condyles and its angle β are smaller than Hylobates concolor leucongeuys. This study is significant, because: 1. The evolution of skull may be related with the increased value K. 2. The moire contour fringes of the Nycticebus coucany's tibia and femur knee joint have lower range of activity. 3. From the moire contour fringes of knee, the Nycticebus coucany and. Hylobates concolor leucongeuys are of one kind. But the moire contour Nycticebus of tibia is different form.

  10. Visual search of illusory contours: Shape and orientation effects

    Directory of Open Access Journals (Sweden)

    Gvozdenović Vasilije

    2008-01-01

    Full Text Available Illusory contours are specific class of visual stimuli that represent stimuli configurations perceived as integral irrespective of the fact that they are given in fragmented uncompleted wholes. Due to their specific features, illusory contours gained much attention in last decade representing prototype of stimuli used in investigations focused on binding problem. On the other side, investigations of illusory contours are related to problem of the level of their visual processing. Neurophysiologic studies show that processing of illusory contours proceed relatively early, on the V2 level, on the other hand most of experimental studies claim that illusory contours are perceived with engagement of visual attention, binding their elements to whole percept. This research is focused on two experiments in which visual search of illusory contours are based on shape and orientation. The main experimental procedure evolved the task proposed by Bravo and Nakayama where instead of detection, subjects were performing identification of one among two possible targets. In the first experiment subjects detected the presence of illusory square or illusory triangle, while in the second experiment subject were detecting two different orientations of illusory triangle. The results are interpreted in terms of visual search and feature integration theory. Beside the type of visual search task, search type proved to be dependent of specific features of illusory shapes which further complicate theoretical interpretation of the level of their perception.

  11. Tennis elbow surgery

    Science.gov (United States)

    Lateral epicondylitis - surgery; Lateral tendinosis - surgery; Lateral tennis elbow - surgery ... Surgery to repair tennis elbow is usually an outpatient surgery. This means you will not stay in the hospital overnight. You will be ...

  12. Contours, Green Co 10' Contours, Published in 2005, 1:4800 (1in=400ft) scale, MSA Professional Services.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:4800 (1in=400ft) scale, was produced all or in part from Orthoimagery information as of 2005. It is described as 'Green Co 10'...

  13. A possible analogy between contours in mathematics--as exemplified by Cauchy's integral formula--and contours in the arts.

    Science.gov (United States)

    Gerr, S

    1982-01-01

    An attempt is made to draw an analogy between contour drawing and a particular mathematical theorem. The analogy is seen to depend on the fact that both methods use definite values along a contour to imply a totality of values within the contour; thus, the use of a part to suggest the whole, by way of a hypothetical 'gestalt-like integration' in the case of the art contour, and the usual process of mathematical integration in the case of Cauchy's formula. Examples illustrating the analogy are drawn from a wide range of artistic work: a modern American drawing, a Cro-Magnon cave painting, and two Chinese works. The traditional Chinese philosophy of painting is invoked in support of the analogy because of its explicit emphasis on the primacy of outline drawing in Chinese painting. Some speculations are offered on further development and application of the analogy. PMID:7182805

  14. Contours - CONTOURS_24K_USGS_ADRIAN: Elevation Contours from 7.5-Minute Topographic Quadrangle Maps, Grouped into the 30' x 1째 Adrian Quadrangle, Indiana, Michigan, and Ohio (United States Geological Survey, 1:24,000, Line Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — CONTOURS_24K_USGS_ADRIAN is a shapefile containing elevation contours produced at a scale of 1:24,000, grouped into a 30' x 1째 quadrangle block. Elevation values...

  15. Brightness/darkness induction and the genesis of a contour

    Science.gov (United States)

    Roncato, Sergio

    2014-01-01

    Visual contours often result from the integration or interpolation of fragmented edges. The strength of the completion increases when the edges share the same contrast polarity (CP). Here we demonstrate that the appearance in the perceptual field of this integrated unit, or contour of invariant CP, is concomitant with a vivid brightness alteration of the surfaces at its opposite sides. To observe this effect requires some stratagems because the formation in the visual field of a contour of invariant CP normally engenders the formation of a second contour and then the rise of two streams of induction signals that interfere in different ways. Particular configurations have been introduced that allow us to observe the induction effects of one contour taken in isolation. I documented these effects by phenomenological observations and psychophysical measurement of the brightness alteration in relation to luminance contrast. When the edges of the same CP complete to form a contour, the background of homogeneous luminance appears to dim at one side and to brighten at the opposite side (in accord with the CP). The strength of the phenomenon is proportional to the local luminance contrast. This effect weakens or nulls when the contour of the invariant CP separates surfaces filled with different gray shades. These conflicting results stimulate a deeper exploration of the induction phenomena and their role in the computation of brightness contrast. An alternative perspective is offered to account for some brightness illusions and their relation to the phenomenal transparency. The main assumption asserts that, when in the same region induction signals of opposite CP overlap, the filling-in is blocked unless the image is stratified into different layers, one for each signal of the same polarity. Phenomenological observations document this “solution” by the visual system. PMID:25368570

  16. MOCK SURGERIES IN AYURVEDA

    Directory of Open Access Journals (Sweden)

    Bali Yogitha

    2012-10-01

    Full Text Available The present trend is very well aware of mock tests, exams and even the mock surgeries that are very common in healthcare and play an important role in providing the surgeons, the necessary practical knowledge and expertise in their specialized field. In addition, patients also get benefited by the mock surgeries by having the complete knowledge before they undergo any surgery. The same concept of mock or the experimental surgeries can be found explained centuries ago by Susrutha, father of both the Ancient and Modern surgery in the Susrutha samhitha under the chapter yogya-sutriya. Hence here, an effort was made to explore the same. Further research studies should be focused on the concept explained by Sushrutha to make it valid and applicable to the present day. The ancient surgical science is known as Salya-tantra. Salya-tantra (surgical science embraces all processes aiming at the removal of factors responsible for producing pain or misery to the body or mind. Salya(salya-surgical instrument denotes broken parts of an arrow /other sharp weapons while tantra denotes maneuver. 1 To obtain the complete success in the aimed operating work, practice of similar operations before hand is called yoga and the experiment of such practice is called yogya. An intelligent surgeon, who does experimental surgery methodically, does not lose his presence of mind while doing the actual operations.Therefore, he who wants to be an expert in the use of surgical operations, caustics or thermal cauterizations should practice the same experimentally on similar subjects.

  17. 胃转流手术对代谢综合征患者体脂分布改变的影响%Impact of gastric bypass surgery on body fat distribution in patients with metabolic syndrome

    Institute of Scientific and Technical Information of China (English)

    王瑜; 陈自谦; 戴露倢; 刘斌; 王畅; 黄盛

    2012-01-01

    目的 探讨胃转流术后代谢综合征患者体脂分布的改变情况.方法 2009年7月至2010年2月间南京军区福州总院前瞻性入组收治26例胃癌合并代谢综合征病例,行胃转流手术.分别于术前和术后1、4、12、48周,检测体质量指数(BMI)、腰围、臀围和脂肪面积等体脂参数,以及胰岛素抵抗指数(HOMA-IR)等生化指标.结果 胃转流术后,26例代谢综合征患者肥胖、高血压、血脂紊乱及高血糖均获得了不同程度的好转.术后48周,26例患者HOMA-IR由术前的5.7±1.5降至3.4±1.0,BMI由术前的(27.1±3.8) kg/m2降至(22.6± 1.4) kg/m2(P<0.05).其中心性肥胖指标腰围由术前的(95.3±2.5) cm降至(75.3±1.1) cm,内脏脂肪面积由术前的(101.7±13.8) cm2降至(78.7±11.2) cm2(P<0.05);而外周性肥胖指标皮下脂肪面积未见下降(P>0.05).结论 胃转流术后体脂分布由中心性肥胖向外周性肥胖转变;胰岛素抵抗改善与中心性体脂参数下降有关.%Objective To evaluate the changes in body fat distribution after gastric bypass in gastric cancer patients with metabolic syndrome. Methods From July 2009 to February 2010, 26 patients with gastric cancer and concurrent metabolic syndrome were prospectively enrolled and underwent gastric bypass surgery at the Fuzhou General Hospital of Nanjing Military Command.Body mass index (BMI),waist circumference,hip circumference,insulin and insulin resistance index were measured before operation and at postoperative 1,4,12,24,48 weeks. Results After gastric bypass surgery,metabolic syndrome was improved including obesity,hypertension,disturbance of lipid and hyperglycemia.After 48 weeks postoperatively HOMA-IR decreased from 5.7±1.5 to 3.4±1.0 (P<0.05).BMI decreased from (27.1±3.8) kg/m2 to (22.6±1.4) kg/m2 (P<0.05).Indices for central obesity:waist circumference decreased from (95.3±2.5)cm to (75.3±1.1)cm,and visceral fat area decreased from (101.7±13.8) cm2 to (78.7±11.2) cm2

  18. Study on influence of comprehensive thermal insulation on body temperature of patients undergoing abdominal surgery%开腹手术患者全程综合保温对体温变化影响的研究

    Institute of Scientific and Technical Information of China (English)

    彭玉娜; 薄金华; 苑广洁; 张华; 刘春英

    2014-01-01

    目的:通过探讨3种不同保温措施对开腹手术患者围术期体温变化的影响,为患者采取有效的保温措施提供依据。方法选取择期开腹手术患者共90例,随机分为3组,医用升温毯组、充气式升温毯组和综合保温组,每组各30例,对患者在手术中的不同时间点监测其直肠温度、脉搏、血压和麻醉复苏时间等变化。结果3组患者所在手术间温度及其入手术室的体温差异无统计学意义;麻醉1 h开始医用升温毯组患者体温为(36.43±0.48)℃与充气加温组(36.69±0.40)℃比较显著下降( P<0.05),麻醉2 h 医用电热升温毯组(36.12±0.46)℃较充气组(36.61±0.43℃和综合保温组(36.47±0.42)℃均显著下降( P<0.05),而充气加温组和综合保温组间差异无统计学意义。结论在开腹手术过程中应用医用升温毯虽能起到一定保温作用,但是随着手术时间延长,患者仍然会有低体温出现,充气式升温毯法和综合保温法均可有效避免围手术期低体温的发生。%OBJECTIVE To observe the influence of three thermal insulation measures on change of body tempera‐ture during the perioperative period of abdominal surgery so as to take more effective thermal insulation method . METHODS A total of 90 patients who underwent the elective abdominal surgery were enrolled in the study and randomly divided into the three groups :the medical electric blanket group ,the forced‐air warming blanket group , and the comprehensive thermal insulation group ;the changes of rectal temperature ,pulse rate ,blood pressure , and time of recovery from anesthesia were monitored at different time points during the surgery .RESULTS There was no statistically significant difference in the intraoperative body temperature or the body temperature at admis‐sion to the hospital between the three groups of patients .At 1 hour of anesthesia ,the body

  19. Contours, 2' Contours for Iredell County provided by 2003 NC Floodplain Mapping Program data, Published in 2007, 1:4800 (1in=400ft) scale, Iredell County GIS.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:4800 (1in=400ft) scale, was produced all or in part from LIDAR information as of 2007. It is described as '2' Contours for...

  20. Contours, Two-foot contours for Oconee County, Georgia, Published in 2006, 1:12000 (1in=1000ft) scale, Northeast Georgia Regional Commission.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:12000 (1in=1000ft) scale, was produced all or in part from LIDAR information as of 2006. It is described as 'Two-foot contours...

  1. Contours, 10ft contours of Lowndes County, GA, Published in 1999, 1:7200 (1in=600ft) scale, Southern Georgia Regional Commission.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:7200 (1in=600ft) scale as of 1999. It is described as '10ft contours of Lowndes County, GA'. Data by this publisher are often...

  2. Contours, Two-foot contours for Athens-Clarke County, Georgia, Published in 2005, 1:12000 (1in=1000ft) scale, Northeast Georgia Regional Commission.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:12000 (1in=1000ft) scale, was produced all or in part from LIDAR information as of 2005. It is described as 'Two-foot contours...

  3. Contours, 2 foot contours for the entire MCCOG MPA area., Published in 2003, 1:600 (1in=50ft) scale, Madison County Council of Governments.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:600 (1in=50ft) scale, was produced all or in part from LIDAR information as of 2003. It is described as '2 foot contours for...

  4. Contours, Two-foot contours for Morgan County, Georgia, Published in 2006, 1:12000 (1in=1000ft) scale, Northeast Georgia Regional Commission.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:12000 (1in=1000ft) scale, was produced all or in part from LIDAR information as of 2006. It is described as 'Two-foot contours...

  5. Body Mass Index Is a Marker of Nutrition Preparation Sufficiency Before Surgery for Crohn's Disease From the Perspective of Intra-Abdominal Septic Complications

    Science.gov (United States)

    Zhang, Min; Gao, Xiang; Chen, Yuanhan; Zhi, Min; Chen, Huangwei; Tang, Jian; Su, Minli; Yao, Jiayin; Yang, Qingfan; Chen, Junrong; Hu, Pinjin; Liu, Huanliang

    2015-01-01

    Abstract Poor preoperative nutritional status for individuals with Crohn's disease (CD) is associated with intra-abdominal septic complications (IASCs). The present study aimed to investigate the association of the common nutrition indices serum albumin and body mass index (BMI) with IASCs. Sixty-four CD patients who had received elective intestinal operations were retrospectively investigated. Among these patients, 32 had received individualized fortified nutrition support. IASCs occurred in 7 patients (10.9%). Compared with non-IASC patients, IASC patients had a lower BMI (17.6 ± 2.7 vs 15.6 ± 1.3 kg/m2, P = 0.048). The area under the receiver operating characteristic curve according to the BMI-based IASC prediction was 0.772 (95% confidence interval [CI], 0.601–0.944; P = 0.020) with an optimum diagnostic cutoff value of 16.2 kg/m2. A BMI < 16.2 kg/m2 significantly increased the risk of developing an IASC (odds ratio [OR], 10.286; 95% CI, 1.158–91.386). Even after correction with the simplified CD activity index (CDAI), a low BMI level remained associated with IASCs (OR, 7.650; 95% CI, 0.808–72.427; P = 0.076). Serum albumin was not associated with IASCs. Although the fortified nutrition support group had an albumin level comparable to the control group, this group had a higher simplified CDAI score, a lower BMI level, and a comparable incidence rate of IASCs. Thus, BMI more accurately reflects the basic preoperative nutritional status of CD patients than serum albumin. BMI can aid in guiding preoperative nutrition support and judging the appropriate operation time for CD. PMID:26334908

  6. Infants' perception of subjective contours from apparent motion.

    Science.gov (United States)

    Yamaguchi, Masami K; Kanazawa, So; Okamura, Hiromi

    2008-01-01

    We examined infants' perception of subjective contours in Subjective-Contour-from-Apparent-Motion (SCAM) stimuli [e.g., Cicerone, C. M., Hoffman, D. D., Gowdy, P. D., & Kim, J. S. (1995). The perception of color from motion. Perception & Psychophysics, 57, 761-777] using the preferential looking technique. The SCAM stimulus is composed of random dots which are assigned two different colors. Circular region assigned one color moved apparently, keeping all dots' location unchanged. In the SCAM stimulus, adults can perceive subjective color spreading and subjective contours in apparent motion (http://c-faculty.chuo-u.ac.jp/ approximately ymasa/okamura/ibd_demo.html). In the present study, we conducted two experiments by using this type of SCAM stimulus. A total of thirty-six 3-8-month-olds participated. In experiment 1, we presented two stimuli to the infants side by side: a SCAM stimulus consisting of different luminance, and a non-SCAM stimulus consisting of isoluminance dots. The results indicated that the 5-8-month-olds showed preference for the SCAM stimuli. In experiments 2 and 3, we confirmed that the infants' preference for the SCAM stimulus was not generated by the local difference and local change made by luminance of dots but by the subjective contours. These results suggest that 5-8-month-olds were able to perceive subjective contours in the SCAM stimuli. PMID:17727955

  7. Incorporating Stream Features into Groundwater Contouring Tools Within GIS.

    Science.gov (United States)

    Bannister, Roger; Kennelly, Patrick

    2016-03-01

    Hydrogeologists often are called upon to estimate surfaces from discrete, sparse data points. This estimation is often accomplished by manually drawing contours on maps using interpolation methods between points of known value while accounting for features known to influence the water table's surface. By contrast, geographic information systems (GIS) are good at creating smooth continuous surfaces from limited data points and allowing the user to represent the resulting surface resulting with contours, but these automated methods often fail to meet the expectations of many hydrogeologists because they do not include knowledge of other influences on the water table. In this study, we seek to fill this gap in the GIS-based methodology for hydrogeologists through an interactive tool that shapes an interpolated surface based on additional knowledge of the water table inferred from gaining or losing streams. The modified surface is reflected in water table contours that, for example, "V" upstream for gaining streams, and can be interactively adjusted to fit the user's expectations. By modifying not only the contours but also the associated interpolated surface, additional contours will follow the same trend, and the modified surface can be used for other analyses like calculating average gradients and flow paths. The tool leverages Esri's ArcGIS Desktop software, building upon a robust suite of mapping tools. We see this as a prototype for other tools that could be developed for hydrogeologists to account for variations in the water table inferred from local topographic trends, pumping or injection wells, and other hydrogeologic features.

  8. Active contour model based on force field analysis

    Institute of Scientific and Technical Information of China (English)

    HOU Zhi-qiang; HAN Chong-zhao

    2006-01-01

    The traditional snake initial contour should be close to the true boundary of an object of interest in an image;otherwise,an incorrect result will be obtained.Next,active contours have difficulties progressing into boundary concavities.Moreover,the traditional snake as well as almost all of its improved methods can be easily obtained from the local minimum because snake models are nonconvex.An active contour model based on force field analysis (FFA),namely,FFA snake model,is presented in this paper.Based on analyzing force distribution rules of the distance potential force field,a standard is introduced here to distinguish the false one from contour points.The result is not considered as the final solution when the snake energy is minimal.Furthermore,estimation and calculation should be made according to the established standard;only then can the result be considered final.Thus,the snake is prevented from running into the local minimum.The simulation results show that the FFA snake model has a large capture range and can move a snake into the boundary concavities,and that it is able to obtain the object of interest's contour precisely.Compared with the gradient vector flow snake,this new model has a low computational cost.

  9. OPTIMIZATION METHOD ON IMPELLER MERIDIONAL CONTOUR AND 3D BLADE

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    An optimization method for 3D blade and meridional contour of centrifugal or mixed-flow impeller based on the 3D viscous computational fluid dynamics (CFD) analysis is proposed. The blade is indirectly parameterized using the angular momentum and calculated by inverse design method. The design variables are separated into two categories: the meridional contour design variables and the blade design variables. Firstly, only the blade is optimized using genetic algorithm with the meridional contour remained constant. The artificial neural network (ANN) techniques with the training sample data schemed according to design of experiment theory are adopted to construct the response relation between the blade design variables and the impeller performance. Then, based on the ANN approximated relation between the meridional contour design variables and impeller performance, the meridional contour is optimized. Fewer design variables and less calculation effort is required in this method that may be widely used in the optimization of three-dimension impellers. An optimized impeller in a mixed-flow pump, where the head and the efficiency are enhanced by 12.9% and 4.5% respectively, confirms the validity of this newly proposed method.

  10. Carotid artery surgery

    Science.gov (United States)

    Carotid endarterectomy; CAS surgery; Carotid artery stenosis - surgery; Endarterectomy - carotid artery ... through the catheter around the blocked area during surgery. Your carotid artery is opened. The surgeon removes ...

  11. Emergency surgery

    DEFF Research Database (Denmark)

    Stoneham, M; Murray, D; Foss, N

    2014-01-01

    undertaken on elderly patients with limited physiological reserve. National audits have reported variations in care quality, data that are increasingly being used to drive quality improvement through professional guidance. Given that the number of elderly patients presenting for emergency surgery is likely...

  12. Cosmetic surgery.

    OpenAIRE

    1989-01-01

    The psychotherapeutic nature of cosmetic surgery is emphasised by outlining the range of symptoms from which patients suffer and by explaining the sequence of psychological reactions which cause them. The principles which govern the selection of patients are defined. A brief account of each of the main cosmetic operations is given together with notes on their limitations and risks.

  13. Choosing surgery

    DEFF Research Database (Denmark)

    Thorstensson, Carina; Lohmander, L; Frobell, Richard;

    2009-01-01

    ABSTRACT: BACKGROUND: The objective was to understand patients' views of treatment after acute anterior cruciate ligament (ACL) injury, and their reasons for deciding to request surgery despite consenting to participate in a randomised controlled trial (to 'cross-over'). METHODS: Thirty-four in...

  14. Performance comparisons of contour-based corner detectors.

    Science.gov (United States)

    Awrangjeb, Mohammad; Lu, Guojun; Fraser, Clive S

    2012-09-01

    Corner detectors have many applications in computer vision and image identification and retrieval. Contour-based corner detectors directly or indirectly estimate a significance measure (e.g., curvature) on the points of a planar curve, and select the curvature extrema points as corners. While an extensive number of contour-based corner detectors have been proposed over the last four decades, there is no comparative study of recently proposed detectors. This paper is an attempt to fill this gap. The general framework of contour-based corner detection is presented, and two major issues-curve smoothing and curvature estimation, which have major impacts on the corner detection performance, are discussed. A number of promising detectors are compared using both automatic and manual evaluation systems on two large datasets. It is observed that while the detectors using indirect curvature estimation techniques are more robust, the detectors using direct curvature estimation techniques are faster. PMID:22645267

  15. A Novel Global Threshold-Based Active Contour Model

    Directory of Open Access Journals (Sweden)

    Nuseiba M. Altarawneh

    2014-02-01

    Full Text Available n this paper, we propose a novel global threshold- based active contour model which employs a new edge-stopping function that controls the direction of the evolution and stops the evolving contour at weak or blurred edges. The model is implemented usi ng selective binary and Gaussian filtering regularized level set (SBGFRLS method. The method has a selective local or global segmentation property. It selectively penalizes the level set fu nction to be a binary function. This is followed by using a Gaussian function to regularize it. The Gau ssian filters smooth the level set function and afford the evolution more stability. The contour co uld be initialized anywhere inside the image to extract object boundaries. The proposed method perf orms well when the intensities inside and outside the object are homogenous. Our method is te sted on synthetic, medical and Arabic- characters images with satisfactory results

  16. A Robust Algorithm of Contour Extraction for Vehicle Tracking

    Institute of Scientific and Technical Information of China (English)

    FANZhimin; ZHOUJie; GAODashan

    2003-01-01

    Contour extraction of moving vehicle is an important and challenging issue in traffic surveillance. In this paper, a robust algorithm is proposed for contour ex-traction and moving vehicle tracking. First, we establish a modified snake model and utilize the directional infor-mation of the edge map to guide the snaxels' behavior.Then an adaptive shape restriction is embedded into the algorithm to govern the scope of the snake's motion, and Kalman filter is employed to estimate spatio-temporal rela-tionship between successive frames. In addition~ multiple refinements are suggested to compensate for the snake's vulnerability to fake edges. All of them contribute to a ro-bust overall performance in contour extraction and vehicle tracking. Experimental results in real traffic scene prove the effectiveness of our algorithm.The comparison with conventional snakes is also provided.

  17. Scattering Suppression and Absorption Enhancement in Contour Nanoantennas

    CERN Document Server

    Onal, E Doruk

    2015-01-01

    The expanding application spectrum of plasmonic nanoantennas demand versatile design approaches to tailor the antenna properties for specific requirements. The design efforts primarily concentrate on shifting the operation wavelength or enhancing the local fields by manipulating the size and shape of the nanoantenna. Here, we propose a design path to control the absorption and scattering characteristics of a dipole nanoantenna by introducing a hollow region inside the nanostructure. The resulting contour geometry can significantly suppress the scattering of the dipole nanoantenna and enhance its absorption simultaneously. Both the dipole and the contour dipole nanoantenna couple to equivalent amount of the incident radiation. The dipole nanoantenna scatters 84% of the coupled power (absorbs the remaining 16%) whereas the contour dipole structure scatters only 28% of the coupled power (absorbs the remaining 72%). This constitutes the transformation from scatter to absorber nanoantenna. The scattering of a cont...

  18. Ideality contours and thermodynamic regularities in supercritical molecular fluids

    Science.gov (United States)

    Desgranges, Caroline; Margo, Abigail; Delhommelle, Jerome

    2016-08-01

    Using Expanded Wang-Landau simulations, we calculate the ideality contours for 3 molecular fluids (SF6, CO2 and H2O). We analyze how the increase in polarity, and thus, in the strength of the intermolecular interactions, impacts the contours and thermodynamic regularities. This effect results in the increase in the Boyle and H parameters, that underlie the Zeno line and the curve of ideal enthalpy. Furthermore, a detailed analysis reveals that dipole-dipole interactions lead to much larger enthalpic contributions to the Gibbs free energy. This accounts for the much higher temperatures and pressures that are necessary for supercritical H2O to achieve ideal-like thermodynamic properties.

  19. Body image dissatisfaction and its relationship with physical activity and body mass index in Brazilian adolescents

    OpenAIRE

    Maria F. Laus; Telma M. Braga Costa; Almeida, Sebastião S.

    2011-01-01

    Objective: To evaluate body image dissatisfaction and its relationship with physical activity and body mass index in a Brazilian sample of adolescents. Methods: A total of 275 adolescents (139 boys and 136 girls) between the ages of 14 and 18 years completed measures of body image dissatisfaction through the Contour Drawing Scale and current physical activity by the International Physical Activity Questionnaire. Weight and height were also measured for subsequent calculation of body mass inde...

  20. [Tumor surgery].

    Science.gov (United States)

    Hausamen, J E

    2000-05-01

    Surgery is still the primary therapeutic approach in treatment of tumors in the head and neck area, dating back to the early nineteenth century. More than 150 years ago, hemimaxillectomies and mandibular resections as well as hemiglossectomies were already performed by leading surgeons. The block principle we are now following dates back to Crile, who also established the principle of cervical lymph node dissection. Ablative oncologic surgery has always been closely linked with plastic and reconstructive surgery, rendering radical surgical interventions possible without disfiguring patients. The development of facial reconstructive surgery proceeded in stages, in the first instance as secondary reconstruction using tube pedicled flaps. The change to the concept of primary reconstruction occurred via arterialized skin flaps and myocutaneous flaps to the widely accepted and performed free tissue transfer. Free bone grafting, inaugurated earlier and still representing the majority of bone grafting, has been supplemented for certain reconstructive purposes by free vascularized bone transfer from various donor sites. Although the five-year-survival rate of carcinoma of the oral cavity has remained unchanged in the past 30 years, distinctive improvements in tumor surgery can be recorded. This is primarily based on improved diagnostics such as modern imaging techniques and the refinement of surgical techniques. The DOSAK has worked out distinctive guidelines for effective ablative oncologic surgery. Surgical approaches offering wide exposure and carrying low morbidity play a decisive role in radical resections. For this reason, midfacial degloving offers an essential improvement for the resection of midface tumors, especially from an aesthetic point of view. Tumors situated deep behind the viscerocranium at the skull base can be clearly exposed either through a lateral approach following a temporary osteotomy of the mandibular ramus or a transmandibular, transmaxillar, or

  1. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... more. Dental and Soft Tissue Surgery Dental and Soft Tissue Surgery Oral and facial surgeons surgically treat the ... more. Dental and Soft Tissue Surgery Dental and Soft Tissue Surgery Oral and facial surgeons surgically treat the ...

  2. LASIK - Laser Eye Surgery

    Science.gov (United States)

    ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ...

  3. Alternative Refractive Surgery Procedures

    Science.gov (United States)

    ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ...

  4. What Is Refractive Surgery?

    Science.gov (United States)

    ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ... Uveitis Focus On Pediatric Ophthalmology Education Center Oculofacial Plastic Surgery Center Laser Surgery Education Center Redmond Ethics Center ...

  5. American Board of Surgery

    Science.gov (United States)

    ... Exam Results Results of our fall exams in vascular surgery, pediatric surgery, surgical critical care and surgical oncology ... Feedback Joint Pathway - General & Thoracic Surgery Specialty Definition Vascular Surgery Training Pathways Related Policies Credit for Foreign Medical ...

  6. Facial Cosmetic Surgery

    Science.gov (United States)

    ... and Soft Tissue Surgery Dental and Soft Tissue Surgery Oral and facial surgeons surgically treat the soft tissues ... and Soft Tissue Surgery Dental and Soft Tissue Surgery Oral and facial surgeons surgically treat the soft tissues ...

  7. Dental Implant Surgery

    Science.gov (United States)

    ... and Soft Tissue Surgery Dental and Soft Tissue Surgery Oral and facial surgeons surgically treat the soft tissues ... and Soft Tissue Surgery Dental and Soft Tissue Surgery Oral and facial surgeons surgically treat the soft tissues ...

  8. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... to find out more. Facial Cosmetic Surgery Facial Cosmetic Surgery Extensive education and training in surgical procedures involving ... to find out more. Facial Cosmetic Surgery Facial Cosmetic Surgery Extensive education and training in surgical procedures involving ...

  9. Surgery for Breast Cancer

    Science.gov (United States)

    ... Next Topic Breast-conserving surgery (lumpectomy) Surgery for breast cancer Most women with breast cancer have some type ... Relieve symptoms of advanced cancer Surgery to remove breast cancer There are two main types of surgery to ...

  10. Scoliosis surgery - child

    Science.gov (United States)

    Spinal curvature surgery - child; Kyphoscoliosis surgery - child; Video-assisted thoracoscopic surgery - child; VATS - child ... Before surgery, your child will receive general anesthesia. This will make your child unconscious and unable to feel pain ...

  11. Heart bypass surgery

    Science.gov (United States)

    Off-pump coronary artery bypass; OPCAB; Beating heart surgery; Bypass surgery - heart; CABG; Coronary artery bypass graft; Coronary artery bypass surgery; Coronary bypass surgery; Coronary artery disease - CABG; CAD - CABG; Angina - ...

  12. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... to find out more. Facial Cosmetic Surgery Facial Cosmetic Surgery Extensive education and training in surgical procedures ... to find out more. Facial Cosmetic Surgery Facial Cosmetic Surgery Extensive education and training in surgical procedures ...

  13. Media Images: Do They Influence College Students' Body Image?

    Science.gov (United States)

    Hill, Gina Jarman

    2009-01-01

    Body image perception and body mass index (BMI) among college students exposed and not exposed to photographs of models were compared. Classes were assigned to receive a presentation with or without photographs of models incorporated. Students (n = 184) completed a survey about body/weight satisfaction, height, weight, and the Contour Drawing…

  14. Weighing the Options: Gastric Sleeve Surgery

    Medline Plus

    Full Text Available ... is more widely accepted. This is a relatively new procedure for bariatric surgery. It’s only been around ... body. And this, to the left, is a new stomach. Essentially, like I said, about 20% of ...

  15. Robot-Assisted Gynecologic Oncology Surgery

    Medline Plus

    Full Text Available ... weeks even, before we actually ever touch a human patient. And that's the beauty of the da ... is interesting is in what areas of the body do you not see robotic surgery as an ...

  16. [Robotic surgery in gynecology].

    Science.gov (United States)

    Hibner, Michał; Marianowski, Piotr; Szymusik, Iwona; Wielgós, Mirosław

    2012-12-01

    results in much less fatigue and therefore increases precision and potentially may decrease the number of medical errors. The eyes of the surgeon are directed at where the hands should be, which is more natural, allows for a more natural body position and mimics open surgery Robot also enables better teaching, especially when two consoles are used. The surgeon and the student may be either sharing the instruments with two consoles or switching between one another. In a situation where the student operates, the surgeon can use the telestation to teach. Robotic simulator attached to one of the consoles allows students to practice after hours. In summary surgical robot is a great tool, especially in gynecology but also in urology cardiac surgery general surgery and laryngology The device will evolve and most likely with time will eliminate laparoscopy PMID:23488297

  17. Theory on the molecular characteristic contour(Ⅰ)——A new approach to defining molecular characteristic contour

    Institute of Scientific and Technical Information of China (English)

    赵东霞; 杨忠志

    1999-01-01

    Based on the classical turning point of electron movement in a molecule, a model for defining the molecular characteristic boundary contour is advanced. By using an accurate ab initio MELD program and an auxiliary program, some electron parameters in a molecule, such as the potential felt by an electron, have been evaluated. According to our model and definition, the molecular characteristic contour of the equilibrium geometry configuration is drawn and a vivid intuitive picture for describing the forming or breaking of a chemical bond is displayed.

  18. Erbium:YAG laser contouring of the nasal dorsum: a preliminary investigation

    Science.gov (United States)

    Truong, Mai T.; Majaron, Boris; Pandoh, Nidhi S.; Wong, Brian J.

    2001-05-01

    In conventional aesthetic rhinoplasty operations, manual or powered rasps are used to reduce the osseo-cartilagenous nasal dorsum. This tactile method requires palpation of the instrument and the dorsum during surgery to estimate the degree of volume reduction, and often requires forceful manipulation of the dorsum which may illicit pain during surgery and contribute to post-operative edema and echymosis. In this preliminary study, we investigated the use of the Erbium:YAG laser ((lambda) equals294 micrometers ) to reduce bone and cartilage using ex-vivo porcine nasal dorsum and human cadaveric tissues. The short pulsed length and high absorption of this laser in biologic tissues results in minimization of thermal injury which are ideal for non- contact optical contouring of osseous and cartilagenous tissues in the face. Two Erbium:YAG lasers were used to ablate fresh porcine nasal bone and compared for their use. One Erbium:YAG laser, the Fidelis Laser, Fontana Medical Lasers, Ljubljana, Slovenija with variable pulse repetition rates (2 to 50 Hz), pulse energy (80 to 1000 mJ), and pulse duration (100, 300, 750 and 1000 microsecond(s) ) was used and compared to the Ultrafine Erbium:YAG laser, Coherent Inc., Santa Clara California, with variable pulse repetition rate (2 to 10 Hz), pulse energy (2-16 J/cm2), and spot diameter (2-6 mm). Only laser parameters approximating the conditions for thermal confinement were evaluated.

  19. A method of dealing polygon's self-intersection contour in SLA

    Institute of Scientific and Technical Information of China (English)

    GAO Yong-qiang; MO Jian-hua; HUANG Shu-huai

    2007-01-01

    The contour of the slices of SLA parts is composed of a great deal of small lines. When offsetting the contour to compensate for the radius of laser spot, many self-intersection contours come into being, which decrease the precision of formed parts. A new lemma to judge the local self-intersection contour and the global self-intersection contour separately is put forward, according to which self-intersection contour can be removed reliably. Meanwhile, a new beam offsetting algorithm for SLA parts is described, which brings about good results in the practical manufacturing process.

  20. Algorithms for Accurate and Fast Plotting of Contour Surfaces in 3D Using Hexahedral Elements

    Science.gov (United States)

    Singh, Chandan; Saini, Jaswinder Singh

    2016-07-01

    In the present study, Fast and accurate algorithms for the generation of contour surfaces in 3D are described using hexahedral elements which are popular in finite element analysis. The contour surfaces are described in the form of groups of boundaries of contour segments and their interior points are derived using the contour equation. The locations of contour boundaries and the interior points on contour surfaces are as accurate as the interpolation results obtained by hexahedral elements and thus there are no discrepancies between the analysis and visualization results.

  1. The role of "contrast enhancement" in the detection and appearance of visual contours.

    Science.gov (United States)

    Hess, R F; Dakin, S C; Field, D J

    1998-03-01

    We test the proposition that the appearance and detection of visual contours is based on an increase in the perceived contrast of contour elements. First we show that detection of contours is quite possible in the presence of very high levels of variability in contrast. Second we show that inclusion in a contour does not induce Gabor patches to appear to be of higher contrast than patches outside of a contour. These results suggest that, contrary to a number of current models, contrast or its assumed physiological correlate (the mean firing rate of early cortical neurons) is not the determining information for identifying the contour.

  2. Luminance contours can gate afterimage colors and 'real' colors

    NARCIS (Netherlands)

    Anstis, S.; Vergeer, M.L.T.; Lier, R.J. van

    2012-01-01

    It has long been known that colored images may elicit afterimages in complementary colors. We have already shown (Van Lier, Vergeer, & Anstis, 2009) that one and the same adapting image may result in different afterimage colors, depending on the test contours presented after the colored image. The c

  3. Contour detection based on nonclassical receptive field inhibition

    NARCIS (Netherlands)

    Grigorescu, Cosmin; Petkov, Nicolai; Westenberg, Michel A.

    2003-01-01

    We propose a biologically motivated computational step, called nonclassical receptive field (non-CRF) inhibition, more generally surround inhibition or suppression, to improve contour detection in machine vision. Non-CRF inhibition is exhibited by 80% of the orientation-selective neurons in the prim

  4. The role of non-CRF inhibition in contour detection

    NARCIS (Netherlands)

    Grigorescu, Cosmin; Petkov, Nicolai; Westenberg, Michel A.; Skala,

    2003-01-01

    We propose a biologically motivated computational step, called non-classical receptive field (non-CRF) inhibition, to improve the performance of contour detectors. Non-CRF inhibition is exhibited by 80% of the orientation selective neurons in the primary visual cortex of macaque monkeys and has been

  5. Topology Optimization - Improved Checker-Board Filtering With Sharp Contours

    DEFF Research Database (Denmark)

    Pedersen, Christian Gejl; Lund, Jeppe Jessen; Damkilde, Lars;

    2006-01-01

    In topology optimization it is mandatory to use a filtering technique in order to prevent checker-boarder solutions. The paper examines a new filtering principle and demonstrates an improved sharpness in the contours. This was not realized in the original proposal of the filter. Furthermore...

  6. Application of Active Contour Model in Tracking Sequential Nearshore Waves

    Institute of Scientific and Technical Information of China (English)

    Yu-Hung HSIAO; Min-Chih HUANG

    2009-01-01

    In the present study,a generalized active contour model of gradient vector flow is combined with the video techniques of Argus system to delineate and track sequential nearshore wave crest profdes in the shoaling process,up to their breaking on the shorehne.Previous applications of active contour models to water wave problems are limited to controllable wave tank experiments.By contrast,our application in this study is in a nearshore field environment where oblique images obtained under natural and varying condition of ambient light are employed.Existing Argus techniques produce plane image data or time series data from a selected small subset of discrete pixels.By contrast,the active contour model produces line image data along continuous visible curves such as wave crest profdes.The combination of these two existing techniques,the active contour model and Argus methodologies,facilitates the estimates of the direction wave field and phase speeds within the whole area covered by camera.These estimates are useful for the purpose of inverse calculation of the water depth.Applications of the present techniques to Hsi-tzu bay where a beach restoration program is currently undertaken are illustrated.This extension of Argus video techniques provides new application of optical remote sensing to study the hydrodynamics and morphology of a nearshore environment.

  7. Multiple LREK active contours for knee meniscus ultrasound image segmentation.

    Science.gov (United States)

    Faisal, Amir; Ng, Siew-Cheok; Goh, Siew-Li; George, John; Supriyanto, Eko; Lai, Khin W

    2015-10-01

    Quantification of knee meniscus degeneration and displacement in an ultrasound image requires simultaneous segmentation of femoral condyle, meniscus, and tibial plateau in order to determine the area and the position of the meniscus. In this paper, we present an active contour for image segmentation that uses scalable local regional information on expandable kernel (LREK). It includes using a strategy to adapt the size of a local window in order to avoid being confined locally in a homogeneous region during the segmentation process. We also provide a multiple active contours framework called multiple LREK (MLREK) to deal with multiple object segmentation without merging and overlapping between the neighboring contours in the shared boundaries of separate regions. We compare its performance to other existing active contour models and show an improvement offered by our model. We then investigate the choice of various parameters in the proposed framework in response to the segmentation outcome. Dice coefficient and Hausdorff distance measures over a set of real knee meniscus ultrasound images indicate a potential application of MLREK for assessment of knee meniscus degeneration and displacement. PMID:25910057

  8. Temperature Contours and Ghost-Surfaces for Chaotic Magnetic Fields

    International Nuclear Information System (INIS)

    Steady state solutions for anisotropic heat transport in a chaotic magnetic field are determined numerically and compared to a set of 'ghost-surfaces', surfaces constructed via an action-gradient flow between the minimax and minimizing periodic orbits. The ghost-surfaces are in remarkable agreement with the temperature contours.

  9. Integrability and Wilson loops: the wavy line contour

    CERN Document Server

    Cagnazzo, A

    2013-01-01

    The Wilson loop with a wavy line contour is studied using integrable methods. The auxiliary problem is solved and the Lax operator is built to first order in perturbation theory, considering a small perturbation from the straight line. Finally the spectral curve of the solution is considered.

  10. Design of a Vibrotactile Vest for Contour Perception

    Directory of Open Access Journals (Sweden)

    Juan Wu

    2012-11-01

    Full Text Available A vibrotactile array is a promising human computer interface which could display graphical information to users in a tactile form. This paper presents the design and testing of an image contour display system with a vibrotactile array. The tactile image display system is attached to the back of the user. It converts visual graphics into 2D tactile images and allows subjects to feel the contours of objects through vibration stimulus. The system consists of a USB camera, 48 (6×8 vibrating motors and an embedded control system. The image is captured by the camera and the 2D contour is extracted and transformed into vibrotactile stimuli using a temporal‐spatial dynamic coding method. Preliminary experiments were carried out and the optimal parameters of the vibrating time and duration were explored. To evaluate the feasibility and robustness of this vibration mode, letters were also tactilely displayed and the recognition rate about the alphabet letter display was investigated. It was shown that under the condition of no pre‐training for the subjects, the recognition rate was 82%. Such a recognition rate is higher than that of the scanning mode (47.5% and the improved handwriting mode (76.8%. The results indicated that the proposed method was efficient in conveying the contour information to the visually impaired by means of vibrations.

  11. Experimental Investigation of Convoluted Contouring for Aircraft Afterbody Drag Reduction

    Science.gov (United States)

    Deere, Karen A.; Hunter, Craig A.

    1999-01-01

    An experimental investigation was performed in the NASA Langley 16-Foot Transonic Tunnel to determine the aerodynamic effects of external convolutions, placed on the boattail of a nonaxisymmetric nozzle for drag reduction. Boattail angles of 15 and 22 were tested with convolutions placed at a forward location upstream of the boattail curvature, at a mid location along the curvature and at a full location that spanned the entire boattail flap. Each of the baseline nozzle afterbodies (no convolutions) had a parabolic, converging contour with a parabolically decreasing corner radius. Data were obtained at several Mach numbers from static conditions to 1.2 for a range of nozzle pressure ratios and angles of attack. An oil paint flow visualization technique was used to qualitatively assess the effect of the convolutions. Results indicate that afterbody drag reduction by convoluted contouring is convolution location, Mach number, boattail angle, and NPR dependent. The forward convolution location was the most effective contouring geometry for drag reduction on the 22 afterbody, but was only effective for M < 0.95. At M = 0.8, drag was reduced 20 and 36 percent at NPRs of 5.4 and 7, respectively, but drag was increased 10 percent for M = 0.95 at NPR = 7. Convoluted contouring along the 15 boattail angle afterbody was not effective at reducing drag because the flow was minimally separated from the baseline afterbody, unlike the massive separation along the 22 boattail angle baseline afterbody.

  12. Interpopulation variation in contour feather structure is environmentally determined in great tits.

    Directory of Open Access Journals (Sweden)

    Juli Broggi

    Full Text Available BACKGROUND: The plumage of birds is important for flying, insulation and social communication. Contour feathers cover most of the avian body and among other functions they provide a critical insulation layer against heat loss. Feather structure and composition are known to vary among individuals, which in turn determines variation in the insulation properties of the feather. However, the extent and the proximate mechanisms underlying this variation remain unexplored. METHODOLOGY/PRINCIPAL FINDINGS: We analyzed contour feather structure from two different great tit populations adapted to different winter regimes, one northern population in Oulu (Finland and one southern population in Lund (Sweden. Great tits from the two populations differed significantly in feather structure. Birds from the northern population had a denser plumage but consisting of shorter feathers with a smaller proportion containing plumulaceous barbs, compared with conspecifics from the southern population. However, differences disappeared when birds originating from the two populations were raised and moulted in identical conditions in a common-garden experiment located in Oulu, under ad libitum nutritional conditions. All birds raised in the aviaries, including adult foster parents moulting in the same captive conditions, developed a similar feather structure. These feathers were different from that of wild birds in Oulu but similar to wild birds in Lund, the latter moulting in more benign conditions than those of Oulu. CONCLUSIONS/SIGNIFICANCE: Wild populations exposed to different conditions develop contour feather differences either due to plastic responses or constraints. Environmental conditions, such as nutrient availability during feather growth play a crucial role in determining such differences in plumage structure among populations.

  13. Microincision Vitrectomy Surgery in Vitreomacular Traction Syndrome of Retinitis Pigmentosa Patients

    Directory of Open Access Journals (Sweden)

    Enzo Maria Vingolo

    2014-01-01

    Full Text Available Purpose. To investigate long-term retinal changes after microincision pars plana vitrectomy surgery (MIVS and internal limiting membrane (ILM peeling outcome in retinitis pigmentosa (RP patients affected by vitreomacular traction syndrome (VMT with higher vitreous surface adhesion or coexisting epiretinal membrane (ERM. Methods. Eight RP patients suffering from VMT were evaluated by means of best corrected visual acuity (BCVA, anterior and posterior binocular examination, spectral-domain optical coherence tomography (SD-OCT, MP-1 microperimetry (MP-1, and full-field electroretinogram (ERG, before MIVS and ILM peeling and during the 36-month follow-up. Patients were hospitalized for two days after the surgery. Surgical procedure was performed following this schedule: surgical removal of crystalline lens (MICS, MIVS with 23-gauge sutureless system trocars, core vitreous body removal, and balanced-sterile-salin-solution- (BSS- air-gas (SF6 exchange. Results. All patients presented visual acuity (VA increase after MIVS. None of the patients developed ocular hypertension or vitreomacular adhesions during the 3-year follow-up. MP-1 bivariate contour ellipse area (BCEA was reduced in its dimensions and improved in all patients demonstrating a better fixation. Conclusions. MIVS could be the gold standard therapy in RP patients with VMT and higher vitreous surface adhesion or coexisting ERM if medical therapy is not applicable or not effective.

  14. Caprini Scores, Risk Stratification, and Rivaroxaban in Plastic Surgery: Time to Reconsider Our Strategy.

    Science.gov (United States)

    Swanson, Eric

    2016-06-01

    Limited data are available regarding the pathophysiology of venous thromboembolism in plastic surgery patients. In an effort to identify patients at greater risk, some investigators promote individual risk assessment using Caprini scores. However, these scores do not correlate with relative risk values. Affected patients cannot be reliably predicted (97% false positive rate). Caprini scores make many body contouring patients candidates for chemoprophylaxis, an intervention that introduces risks related to anticoagulation. Caprini has financial conflicts with several companies that manufacture products such as enoxaparin, commonly used for chemoprophylaxis. Rivaroxaban, taken orally, has been used by some plastic surgeons as an alternative to enoxaparin injections. However, this medication is not United States Food and Drug Administration approved for venous thromboembolism prophylaxis in plastic surgery patients, and a reversal agent is unavailable. This article challenges the prevailing wisdom regarding individual risk stratification and chemoprophylaxis. Alternative methods to reduce risk for all patients include safer anesthesia methods and Doppler ultrasound surveillance. Clinical findings alone are unreliable in diagnosing deep venous thromboses. Only by using a reliable diagnostic tool such as Doppler ultrasound are we able to learn more about the natural history of this problem in our patients. Such knowledge is likely to better inform our treatment recommendations. PMID:27482481

  15. OSAS Surgery and Postoperative Discomfort: Phase I Surgery versus Phase II Surgery

    Directory of Open Access Journals (Sweden)

    Giulio Gasparini

    2015-01-01

    Full Text Available Introduction. This study aims to investigate the reasons that discourage the patients affected by OSAS to undergo orthognathic surgery and compares the postoperative discomfort of phase I (soft tissue surgery and phase II (orthognathic surgery procedures for treatment of OSAS. Material and Methods. A pool of 46 patients affected by OSAS was divided into two groups: “surgery patients” who accepted surgical treatments of their condition and “no surgery patients” who refused surgical procedures. The “surgery patients” group was further subdivided into two arms: patients who accepted phase I procedures (IP and those who accepted phase II (IIP. To better understand the motivations behind the refusal of II phase procedures, we asked the patients belonging to both the IP group and “no surgery” group to indicate the main reason that influenced their decision to avoid II phase procedures. We also monitored and compared five parameters of postoperative discomfort: pain, painkiller assumption, length of hospitalization, foreign body sensation, and diet assumption following IP and IIP procedures. Results. The main reason to avoid IIP procedures was the concern of a more severe postoperative discomfort. Comparison of the postoperative discomfort following IP versus IIP procedures showed that the former scored worse in 4 out of 5 parameters analyzed. Conclusion. IIP procedures produce less postoperative discomfort. IIP procedures, namely, orthognathic surgery, should be the first choice intervention in patients affected by OSAS and dentoskeletal malformation.

  16. Ladder contours are undetectable in the periphery: a crowding effect?

    Science.gov (United States)

    May, Keith A; Hess, Robert F

    2007-10-29

    We studied the perceptual integration of contours consisting of Gabor elements positioned along a smooth path, embedded among distractor elements. Contour elements either formed tangents to the path ("snakes") or were perpendicular to it ("ladders"). Perfectly straight snakes and ladders were easily detected in the fovea but, at an eccentricity of 6 degrees , only the snakes were detectable. The disproportionate impairment of peripheral ladder detection remained when we brought foveal performance away from ceiling by jittering the orientations of the elements. We propose that the failure to detect peripheral ladders is a form of crowding, the phenomenon observed when identification of peripherally located letters is disrupted by flanking letters. D. G. Pelli, M. Palomares, and N. J. Majaj (2004) outlined a model in which simple feature detectors are followed by integration fields, which are involved in tasks, such as letter identification, that require the outputs of several detectors. They proposed that crowding occurs because small integration fields are absent from the periphery, leading to inappropriate feature integration by large peripheral integration fields. We argue that the "association field," which has been proposed to mediate contour integration (D. J. Field, A. Hayes, & R. F. Hess, 1993), is a type of integration field. Our data are explained by an elaboration of Pelli et al.'s model, in which weak ladder integration competes with strong snake integration. In the fovea, the association fields were small, and the model integrated snakes and ladders with little interference. In the periphery, the association fields were large, and integration of ladders was severely disrupted by interference from spurious snake contours. In contrast, the model easily detected snake contours in the periphery. In a further demonstration of the possible link between contour integration and crowding, we ran our contour integration model on groups of three-letter stimuli

  17. SU-E-J-129: Atlas Development for Cardiac Automatic Contouring Using Multi-Atlas Segmentation

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, R; Yang, J; Pan, T; Milgrom, S; Pinnix, C; Shi, A; Yang, J; Liu, Y; Nguyen, Q; Gomez, D; Dabaja, B; Balter, P; Court, L; Liao, Z [MD Anderson Cancer Center, Houston, TX (United States)

    2015-06-15

    Purpose: To develop a set of atlases for automatic contouring of cardiac structures to determine heart radiation dose and the associated toxicity. Methods: Six thoracic cancer patients with both contrast and non-contrast CT images were acquired for this study. Eight radiation oncologists manually and independently delineated cardiac contours on the non-contrast CT by referring to the fused contrast CT and following the RTOG 1106 atlas contouring guideline. Fifteen regions of interest (ROIs) were delineated, including heart, four chambers, four coronary arteries, pulmonary artery and vein, inferior and superior vena cava, and ascending and descending aorta. Individual expert contours were fused using the simultaneous truth and performance level estimation (STAPLE) algorithm for each ROI and each patient. The fused contours became atlases for an in-house multi-atlas segmentation. Using leave-one-out test, we generated auto-segmented contours for each ROI and each patient. The auto-segmented contours were compared with the fused contours using the Dice similarity coefficient (DSC) and the mean surface distance (MSD). Results: Inter-observer variability was not obvious for heart, chambers, and aorta but was large for other structures that were not clearly distinguishable on CT image. The average DSC between individual expert contours and the fused contours were less than 50% for coronary arteries and pulmonary vein, and the average MSD were greater than 4.0 mm. The largest MSD of expert contours deviating from the fused contours was 2.5 cm. The mean DSC and MSD of auto-segmented contours were within one standard deviation of expert contouring variability except the right coronary artery. The coronary arteries, vena cava, and pulmonary vein had DSC<70% and MSD>3.0 mm. Conclusion: A set of cardiac atlases was created for cardiac automatic contouring, the accuracy of which was comparable to the variability in expert contouring. However, substantial modification may need

  18. Active contour-based visual tracking by integrating colors, shapes, and motions.

    Science.gov (United States)

    Hu, Weiming; Zhou, Xue; Li, Wei; Luo, Wenhan; Zhang, Xiaoqin; Maybank, Stephen

    2013-05-01

    In this paper, we present a framework for active contour-based visual tracking using level sets. The main components of our framework include contour-based tracking initialization, color-based contour evolution, adaptive shape-based contour evolution for non-periodic motions, dynamic shape-based contour evolution for periodic motions, and the handling of abrupt motions. For the initialization of contour-based tracking, we develop an optical flow-based algorithm for automatically initializing contours at the first frame. For the color-based contour evolution, Markov random field theory is used to measure correlations between values of neighboring pixels for posterior probability estimation. For adaptive shape-based contour evolution, the global shape information and the local color information are combined to hierarchically evolve the contour, and a flexible shape updating model is constructed. For the dynamic shape-based contour evolution, a shape mode transition matrix is learnt to characterize the temporal correlations of object shapes. For the handling of abrupt motions, particle swarm optimization is adopted to capture the global motion which is applied to the contour in the current frame to produce an initial contour in the next frame. PMID:23288333

  19. Recognizing the authenticity of emotional expressions: F0 contour matters when you need to know.

    Science.gov (United States)

    Drolet, Matthis; Schubotz, Ricarda I; Fischer, Julia

    2014-01-01

    Authenticity of vocal emotion expression affects emotion recognition and brain activity in the so-called Theory of Mind (ToM) network, which is implied in the ability to explain and predict behavior by attributing mental states to other individuals. Exploiting the variability of the fundamental frequency (F0 contour), which varies more (higher contour) in play-acted expressions than authentic ones, we examined whether contour biases explicit categorization toward a particular authenticity or emotion category. Moreover, we tested whether contour modulates blood-oxygen-level dependent (BOLD) response in the ToM network and explored the role of task as a top-down modulator. The effects of contour on BOLD signal were analyzed by contrasting high and low contour stimuli within two previous fMRI studies that implemented emotion and authenticity rating tasks. Participants preferentially categorized higher contour stimuli as play-acted and lower contour stimuli as sad. Higher contour was found to up-regulate activation task-independently in the primary auditory cortex. Stimulus contour and task were found to interact in a network including medial prefrontal cortex, with an increase in BOLD signal for low-contour stimuli during explicit perception of authenticity and an increase for high-contour stimuli during explicit perception of emotion. Contour-induced BOLD effects appear to be purely stimulus-driven in early auditory and intonation perception, while being strongly task-dependent in regions involved in higher cognition.

  20. Fast Contour-Tracing Algorithm Based on a Pixel-Following Method for Image Sensors.

    Science.gov (United States)

    Seo, Jonghoon; Chae, Seungho; Shim, Jinwook; Kim, Dongchul; Cheong, Cheolho; Han, Tack-Don

    2016-01-01

    Contour pixels distinguish objects from the background. Tracing and extracting contour pixels are widely used for smart/wearable image sensor devices, because these are simple and useful for detecting objects. In this paper, we present a novel contour-tracing algorithm for fast and accurate contour following. The proposed algorithm classifies the type of contour pixel, based on its local pattern. Then, it traces the next contour using the previous pixel's type. Therefore, it can classify the type of contour pixels as a straight line, inner corner, outer corner and inner-outer corner, and it can extract pixels of a specific contour type. Moreover, it can trace contour pixels rapidly because it can determine the local minimal path using the contour case. In addition, the proposed algorithm is capable of the compressing data of contour pixels using the representative points and inner-outer corner points, and it can accurately restore the contour image from the data. To compare the performance of the proposed algorithm to that of conventional techniques, we measure their processing time and accuracy. In the experimental results, the proposed algorithm shows better performance compared to the others. Furthermore, it can provide the compressed data of contour pixels and restore them accurately, including the inner-outer corner, which cannot be restored using conventional algorithms. PMID:27005632

  1. Fast Contour-Tracing Algorithm Based on a Pixel-Following Method for Image Sensors.

    Science.gov (United States)

    Seo, Jonghoon; Chae, Seungho; Shim, Jinwook; Kim, Dongchul; Cheong, Cheolho; Han, Tack-Don

    2016-03-09

    Contour pixels distinguish objects from the background. Tracing and extracting contour pixels are widely used for smart/wearable image sensor devices, because these are simple and useful for detecting objects. In this paper, we present a novel contour-tracing algorithm for fast and accurate contour following. The proposed algorithm classifies the type of contour pixel, based on its local pattern. Then, it traces the next contour using the previous pixel's type. Therefore, it can classify the type of contour pixels as a straight line, inner corner, outer corner and inner-outer corner, and it can extract pixels of a specific contour type. Moreover, it can trace contour pixels rapidly because it can determine the local minimal path using the contour case. In addition, the proposed algorithm is capable of the compressing data of contour pixels using the representative points and inner-outer corner points, and it can accurately restore the contour image from the data. To compare the performance of the proposed algorithm to that of conventional techniques, we measure their processing time and accuracy. In the experimental results, the proposed algorithm shows better performance compared to the others. Furthermore, it can provide the compressed data of contour pixels and restore them accurately, including the inner-outer corner, which cannot be restored using conventional algorithms.

  2. Fast Contour-Tracing Algorithm Based on a Pixel-Following Method for Image Sensors

    Directory of Open Access Journals (Sweden)

    Jonghoon Seo

    2016-03-01

    Full Text Available Contour pixels distinguish objects from the background. Tracing and extracting contour pixels are widely used for smart/wearable image sensor devices, because these are simple and useful for detecting objects. In this paper, we present a novel contour-tracing algorithm for fast and accurate contour following. The proposed algorithm classifies the type of contour pixel, based on its local pattern. Then, it traces the next contour using the previous pixel’s type. Therefore, it can classify the type of contour pixels as a straight line, inner corner, outer corner and inner-outer corner, and it can extract pixels of a specific contour type. Moreover, it can trace contour pixels rapidly because it can determine the local minimal path using the contour case. In addition, the proposed algorithm is capable of the compressing data of contour pixels using the representative points and inner-outer corner points, and it can accurately restore the contour image from the data. To compare the performance of the proposed algorithm to that of conventional techniques, we measure their processing time and accuracy. In the experimental results, the proposed algorithm shows better performance compared to the others. Furthermore, it can provide the compressed data of contour pixels and restore them accurately, including the inner-outer corner, which cannot be restored using conventional algorithms.

  3. Calf Contouring with Endoscopic Fascial Release, Calf Implant, and Structural Fat Grafting

    Directory of Open Access Journals (Sweden)

    Ercan Karacaoglu, MD

    2013-08-01

    Conclusions: A novel endoscopic approach for lower leg contouring is discussed. Endoscopic fasciotomy technique with calf implant and structural fat grafting for improved lower leg aesthetics is a simple, effective, reliable, and predictable technique for calf contouring.

  4. U.S. Atlantic East Coast bathymetry contours (EGLORIA_CNT)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The bathymetric contours, which comprise this GIS data layer, contains contours for the U.S. Atlantic East Coast. The dataset was created for use with the USGS...

  5. Comprehensive contour prediction model of work rolls in hot wide strip mill

    Institute of Scientific and Technical Information of China (English)

    Xiaodong Wang; Quan Yang; Anrui He; Renzhong Wang

    2007-01-01

    The predictive calculation of comprehensive contour of work rolls in the on-line strip shape control model during hot rolling consists of two important parts of wear contour calculation and thermal contour calculation, which have a direct influence on the accuracy of shape control. A statistical wear model and a finite difference thermal contour model of work rolls were described. The comprehensive contour is the equivalence treatment of the sum of grinding, wear, and thermal contours. This comprehensive contour calculation model has been applied successfully in the real on-line strip shape control model. Its high precision has been proved through the large amounts of actual roll profile measurements and theoretical analyses. The hit rates (percent of shape index satisfying requirement) of crown and head flatness of the strips rolled, by using the shape control model, which includes the comprehensive contour calculation model, have about 16% and 10% increase respectively, compared to those of strips rolled by using manual operation.

  6. [Glaucoma and retinal surgery].

    Science.gov (United States)

    Müller, M; Geerling, G; Zierhut, M; Klink, T

    2010-05-01

    In the therapeutic approach to complex glaucomas different initial situations were considered: pre-existing glaucoma, induction of glaucoma after vitreoretinal surgery and antiglaucomatous procedures. In pre-existing glaucoma and after filtering surgery maintenance of the filtering bleb requires a vitreoretinal approach for conjunctiva preservation with techniques such as pneumatic retinopexy or small gauge vitrectomy. After vitreoretinal surgery an increase in intraocular pressure (IOP) is common. Secondary glaucoma may occur after scleral buckling and after vitrectomy with or without gas or silicone oil tamponade as well as after application of steroids. Angle closure glaucoma after scleral buckling develops because of congestion and anterior rotation of the ciliary body. Vitreous tamponades with expansive or saturated gases may cause angle-closure glaucoma with or without pupillary blockage and may critically shorten ocular perfusion. Postoperative checks, immediate action and a ban on boarding aircraft over the period of intraocular gas tamponade prevent permanent damage to the eye. The majority of secondary glaucomas can effectively be controlled by topical medication and adequate postoperative posture of the patient. Besides the temporary use of systemic antiglaucomatous medication or laser therapy, very rarely in cases of massive swelling or overfill, a direct intervention, such as partial gas or silicone oil removal is required. A prophylactic inferior peripheral iridectomy prevents pupillary blockage in aphakic eyes with intraocular tamponade. In cases of heavy silicone oil use, the peripheral iridectomy is placed in the superior position. Nd:YAG laser application will regulate IOP in cases of occlusion. Secondary glaucoma due to silicone oil emulsification overload is treated by trabecular meshwork aspiration and lavage. In refractory glaucoma repetitive cyclophotocoagulation and drainage implants represent an approved method for long-term IOP regulation

  7. Prediction of the rotational state of the humerus by comparing the contour of the contralateral bicipital groove: Method for intraoperative evaluation

    Directory of Open Access Journals (Sweden)

    Se-Jin Park

    2012-01-01

    Full Text Available Background: Accurate reduction of rotational displacement for transverse or comminute fracture of humeral shaft fracture is difficult during operation. The purpose of this study was to evaluate the reliability of the bicipital groove as a point of reference for the prediction of the rotational state of the humerus on two dimensional images of C-arm image intensifier during operation for humeral shaft fractures. Materials and Methods: One hundred subjects, 62 male, 38 female, aged 22-53 years were recruited contralateral bicipital groove on the 45 degrees externally rotational standard anterior-posterior view recorded before surgery. Three observers, watched only contour of bicipital groove in monitor of C-arm image intensification with naked eye without looking at the subject and predicted rotational state of the humerus by comparing the contour of the opposite side of bicipital groove. The angle of discrepancy from real rotational position was then assessed. Results: The mean (SD, angular discrepancy between the neutral point and the predicted angle was 3.4°(±2.7°. A value within 5° was present in 72% of cases. All observations were within 15°. There was no interobserver variation (P = 0.47. The intraclass correlation coefficient (ICC was 0.847. Conclusion: Contour of the bicipital groove on simple radiograph was a useful landmark. Comparing the contour of the bicipital groove in the 45 degrees externally rotational standard view bilaterally, was an effective method for reduction of rotational displacement of the humerus.

  8. Cosmetic surgery in inpatients with eating disorders: attitudes and experience.

    Science.gov (United States)

    Coughlin, Janelle W; Schreyer, Colleen C; Sarwer, David B; Heinberg, Leslie J; Redgrave, Graham W; Guarda, Angela S

    2012-01-01

    Body image disturbance is frequent among individuals undergoing cosmetic surgery and core to the pathology of eating disorders (ED); however, there is little research examining cosmetic surgery in ED. This study examined body image related measures, ED behaviors, and depression as predictors of attitudes toward cosmetic surgery in 129 women with ED. Patients who had undergone surgery (n=16, 12%) were compared to those who had not. Having a purging diagnosis, linking success to appearance, and making physical appearance comparisons were predictive of more favorable cosmetic surgery attitudes. All of those who had undergone surgery had purging diagnoses and, on average, were older, had higher BMIs, and were more likely to make physical appearance comparisons and know someone who had undergone surgery. In ED, acceptance and pursuit of cosmetic surgery appears to be related to social group influences more than weight and shape disturbance, media influences, or mood. PMID:22119760

  9. Motion Geometric Active Contours: Tracking Nonrigid Objects in Clutter Background

    Institute of Scientific and Technical Information of China (English)

    Cen Feng (岑峰); Qi Feihu

    2003-01-01

    MGAC (Motion Geometric Active Contours), a new variational framework of geometric active contours to track multiple nonrigid moving objects in the clutter background in image sequences is presented. This framework, incorporating with the motion edge information, consists of motion detection and tracking stages. At the motion detection stage, the motion edge map provides an approximate edge map of the moving objects. Then, a tracking stage, merely using the static edge information, is considered to improve the motion detection result. Force field regularization method is used to extend the capture range of the edge attraction force field in both stages. Experiments demonstrate that the proposed framework is valid for tracking multiple nonrigid objects in the clutter background.

  10. Segmentation of Coronal Holes Using Active Contours Without Edges

    CERN Document Server

    Boucheron, L E; McAteer, R T J

    2016-01-01

    An application of active contours without edges is presented as an efficient and effective means of extracting and characterizing coronal holes. Coronal holes are regions of low-density plasma on the Sun with open magnetic field lines. As the source of the fast solar wind, the detection and characterization of these regions is important for both testing theories of their formation and evolution and from a space weather perspective. Coronal holes are detected in full disk extreme ultraviolet (EUV) images of the corona obtained with the Solar Dynamics Observatory Atmospheric Imaging Assembly (SDO/AIA). The proposed method detects coronal boundaries without determining any fixed intensity value in the data. Instead, the active contour segmentation employs an energy-minimization in which coronal holes are assumed to have more homogeneous intensities than surrounding active regions and quiet Sun. The segmented coronal holes tend to correspond to unipolar magnetic regions, are consistent with concurrent solar wind ...

  11. Region-based active contour with noise and shape priors

    CERN Document Server

    Lecellier, François; Fadili, Jalal; Aubert, Gilles; Revenu, Marinette; Saloux, Eric

    2008-01-01

    In this paper, we propose to combine formally noise and shape priors in region-based active contours. On the one hand, we use the general framework of exponential family as a prior model for noise. On the other hand, translation and scale invariant Legendre moments are considered to incorporate the shape prior (e.g. fidelity to a reference shape). The combination of the two prior terms in the active contour functional yields the final evolution equation whose evolution speed is rigorously derived using shape derivative tools. Experimental results on both synthetic images and real life cardiac echography data clearly demonstrate the robustness to initialization and noise, flexibility and large potential applicability of our segmentation algorithm.

  12. Clinics of Oblivion: Makeover Culture and Cosmetic Surgery

    OpenAIRE

    Meredith Jones

    2011-01-01

    This paper examines cosmetic surgery tourism, arguing that it can be meaningfully analysed as part of makeover culture. It shows that while cosmetic surgery tourism sits at a junction of cosmetic surgery and medical tourism, it also has much in common with contemporary tourism practices. The paper posits cosmetic surgery tourism not only as an economic and globalised phenomenon but also as a set of practices that are experienced, and that take place on the body (see also Cook, 2010; Bell et a...

  13. Polygonal Approximation of Contour Shapes Using Corner Detectors

    OpenAIRE

    Hermilo Sánchez‐Cruz; Ernesto Bribiesca

    2009-01-01

    A great amount of corner detectors that appear in literature are based on using the Freeman chain code of eight directions,which is used to represent contour shapes. We propose a new method for corner detection based on a three‐symbol chain coderepresentation, which requires lower storage memory and an easy way to obtain shape corners. We compare it with fiveexisting methods, which are well known in the literature, giving our method a better performance. Furthermore, in order toreconstruct th...

  14. Yet another method for triangulation and contouring for automated cartography

    Science.gov (United States)

    De Floriani, L.; Falcidieno, B.; Nasy, G.; Pienovi, C.

    1982-01-01

    An algorithm is presented for hierarchical subdivision of a set of three-dimensional surface observations. The data structure used for obtaining the desired triangulation is also singularly appropriate for extracting contours. Some examples are presented, and the results obtained are compared with those given by Delaunay triangulation. The data points selected by the algorithm provide a better approximation to the desired surface than do randomly selected points.

  15. Impact of contour hedgerows on maize yields in the Philippines

    OpenAIRE

    Shively, Gerald E.

    1998-01-01

    Metadata only record This paper investigates the impact of contour hedgerows on maize yields. The author applies and agricultural production function to assess data from upland Philippine maize farms and hedgerows of double rows of the nitrogen-fixing species Desmodium rensonii and Flemengia macrophylla. Although the findings show a positive long term impact on maize yields, the short term impact of hedgerows is negative; they reduce land available for cultivation and decrease productivity...

  16. Study of detonation wave contours in EFP warhead

    OpenAIRE

    Xu-dong Zu; Zheng-xiang Huang; Chuan-sheng Zhu; Qiang-qiang Xiao

    2016-01-01

    An analytical model for calculating the propagation time of shock wave in a wave shaper is presented in this study. The calculated results show that the contours of three typical detonation waves, such as conical detonation wave, spherical detonation wave, and planar detonation wave, can be formed in the main charge by changing the thickness of wave shaper. The results show that the planar detonation wave do better than the conical detonation and the spherical detonation wave in increasing...

  17. Contours et limites de la comptabilité nationale

    OpenAIRE

    Cassiers, Isabelle

    1998-01-01

    La comptabilité nationale est un instrument qui repose sur nombre de choix et de conventions comptables si bien que la représentation de la vie économique et sociale qu'elle propose demeure partielle. Ces limites sont souvent oubliées dans les interprétations des données économiques. Retour sur les contours exacts du système de comptabilité nationale.

  18. Windows and Facades Retrieval using Similarity on Graph of Contours

    OpenAIRE

    Haugeard, Jean-Emmanuel; Philipp-Foliguet, Sylvie; Precioso, Frédéric

    2009-01-01

    International audience The development of street-level geoviewers become recently a very active and challenging research topic. In this context, the detection, representation and classification of windows can be beneficial for the identification of the respective facade. In this paper, a novel method for windows and facade retrieval is presented. This method, based on a similarity of graph of contours, introduces a new kernel on graph for inexact graph matching. We design a kernel similari...

  19. Performance Evaluation of Autonomous Contour Following Algorithms for Industrial Robot

    OpenAIRE

    Prabuwono, Anton Satria; Said, Samsi; Burhanuddin; Sulaiman, Riza

    2010-01-01

    In this study, the performance evaluations of autonomous contour following task with three different algorithms have been performed for Adept SCARA robot. A prototype of smart tool integrated with sensor has been designed. It can be attached and reattached into robot gripper and interfaced through I/O pins of Adept robot controller for automated robot teaching operation. The algorithms developed were tested on a semicircle object of 40 millimeter radius. The semicircle object was selected bec...

  20. Real-Time Hand Gesture Recognition based on Modified Contour Chain Code Feature Set

    Directory of Open Access Journals (Sweden)

    Reza Azad

    2014-07-01

    Full Text Available Hand gesture recognition and pattern recognition are the growing fields of research. Gestures are the motion of the body or physical action form by the user in order to convey some meaningful information. In this paper we propose a robust and efficient method for real-time hand gesture recognition system. In the suggested method, first, the hand gesture is extracted from the main image by edge detection and morphological operation and then is sent to feature extraction stage. In feature extraction stage modified contour chain code feature set is extracted. Finally in classification stage, we employ multiclass support vector machine (SVM as classifier. In the result part, the proposed approach is applied on American Sign Language (ASL database and the accuracy rate obtained 99.40%. Further, we obtained 99.80% accuracy using five-fold cross validation technique on ASL database.

  1. Giant peritoneal loose bodies

    Directory of Open Access Journals (Sweden)

    Chris van Zyl

    2015-03-01

    Full Text Available Giant peritoneal loose bodies are rare lesions, originating from auto-amputated appendices epiploicae. They may cause urinary or gastrointestinal obstruction and, should the radiologist not be familiar with the entity, can potentially be confused with malignant or parasitic lesions.Familiarity with their characteristic computed tomographic features is essential to prevent unnecessary surgery in the asymptomatic patient. We present a case of a 70-year-old man diagnosed with two giant peritoneal loose bodies.

  2. Contour tracking and probabilistic segmentation of tissue phase mapping MRI

    Science.gov (United States)

    Chitiboi, Teodora; Hennemuth, Anja; Schnell, Susanne; Chowdhary, Varun; Honarmand, Amir; Markl, Michael; Linsen, Lars; Hahn, Horst

    2016-03-01

    Many cardiovascular diseases manifest as an abnormal motion pattern of the heart muscle (myocardium). Local cardiac motion can be non-invasively quantified with magnetic resonance imaging (MRI), using methods such as tissue phase mapping (TPM), which directly measures the local myocardial velocities over time with high temporal and spatial resolution. The challenges for routine clinical use of TPM for the diagnosis and monitoring of cardiac function lie in providing a fast and accurate myocardium segmentation and a robust quantitative analysis of the velocity field. Both of these tasks are difficult to automate on routine clinical data because of the reduced contrast in the presence of noise. In this work, we propose to address these challenges with a segmentation approach that combines smooth, iterative contour displacement and probabilistic segmentation using particle tracing, based on the underlying velocity field. The proposed solution enabled the efficient and reproducible segmentation of TPM datasets from 27 patients and 14 volunteers, showing good potential for routine use in clinical studies. Our method allows for a more reliable quantitative analysis of local myocardial velocities, by giving a higher weight to velocity vectors corresponding to pixels more likely to belong to the myocardium. The accuracy of the contour propagation was evaluated on nine subjects, showing an average error smaller than the spatial resolution of the image data. Statistical analysis concluded that the difference between the segmented contours and the ground truths was not significantly higher than the variability between the manual ground truth segmentations.

  3. Open heart surgery

    Science.gov (United States)

    Heart surgery - open ... lung machine is used in most cases during open heart surgery. While the surgeon works on the ... with these procedures, the surgeon may have to open the chest to do the surgery.

  4. Carotid artery surgery - discharge

    Science.gov (United States)

    ... Surgery, Society for Vascular Medicine, and Society for Vascular Surgery. J Am Coll Cardiol . 2011 Feb 22;57( ... 21288680 . Kinlay S, Bhatt DL. Treatment of noncoronary obstructive ... Textbook of Surgery . 19th ed. Elsevier Saunders; 2012:chap 63.

  5. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... Soft Tissue Surgery Dental Implant Surgery Facial Cosmetic Surgery Head, Neck and Oral Pathology Obstructive Sleep Apnea TMJ and Facial Pain Treatment of Facial Injury Wisdom Teeth Management Procedures Administration of Anesthesia Administration of Anesthesia Oral ...

  6. Ear Plastic Surgery

    Science.gov (United States)

    ... receive light-weight earrings. Does Insurance Pay for Cosmetic Ear Surgery? Insurance usually does not cover surgery solely for ... republication strictly prohibited without prior written permission. Ears Cosmetic Surgery, Facelift, Rhinoplasty, Blepharoplasty ... Get Involved Professional Development Practice ...

  7. Laser surgery - skin

    Science.gov (United States)

    Surgery using a laser ... used is directly related to the type of surgery being performed and the color of the tissue ... Laser surgery can be used to: Close small blood vessels to reduce blood loss Remove warts , moles , sunspots, and ...

  8. Surgery for pancreatic cancer

    Science.gov (United States)

    ... medlineplus.gov/ency/article/007649.htm Surgery for pancreatic cancer To use the sharing features on this page, ... surgery are used in the surgical treatment of pancreatic cancer. Whipple procedure: This is the most common surgery ...

  9. Single incision laparoscopic surgery

    Institute of Scientific and Technical Information of China (English)

    Arun; Prasad

    2010-01-01

    As a complement to standard laparoscopic surgery and a safe alternative to natural orifice transluminal endoscopic surgery,single incision laparoscopic surgery is gaining popularity.There are expensive ports,disposable hand instruments and flexible endoscopes that have been suggested to do this surgery and would increase the cost of operation.For a simple surgery like laparoscopic cholecystectomy,these extras are not needed and the surgery can be performed using standard ports,instruments and telescopes.Tri...

  10. Liposucción con diodo láser 980-nm (LSDL 980-nm: optimización de protocolo seguro en cirugía de contorno corporal Body contouring using laser diode 980-nm (LSDL 980-nm assisted lipolysis: a safe procedure

    Directory of Open Access Journals (Sweden)

    P. Centurión

    2011-12-01

    the technique. We use a diode laser-980 nm (ORlight®, transporting its energy through a 600 μm fiber. This concludes in the aplication of 99 J per cm² of treated area with a width of until 4 cm of subcutaneous adipose tissue. All the complications were considered minor or nonexistent. Within the minor complications that were 48.33 % (116 patients most cases presented minimum echymosis (less than 2 % of the body surface. The time required to control pain was between 1 and 2 days, depending on the procedure. We consider important to incorporate the LSDL 980 -nm in clinical practice because it is a less traumatic technique with a low rate of minor complications, significant skin retraction, short recuperation period and less postoperative pain.

  11. Time contour expression of limited range phenomena on stack chart; Jugo chart jo deno kyokuchi gensho jikan contour

    Energy Technology Data Exchange (ETDEWEB)

    Kametani, T.

    1997-05-27

    Time contour expression of limited range phenomena on stack chart is examined for further improvement on the result of the ultimate interpretation in the seismic reflection survey. The policy is made clear from the beginning that local phenomena are to be discussed, and data prior CMP stacking is interpreted in detail. For this purpose, it is effective to make use of the time contour expression in the midpoint-offset plane simultaneously with the CMP and COP panels. For the review of data prior to CMP stacking, it is convenient to use the CMP (CDP) stacking chart in which the data is arranged methodically. In this chart, all the channels which are crude data prior to stacking are plotted on midpoint-offset coordinates, which plane is called the MOD (Midpoint Offset Domain) panel. Various panels can be chosen unrestrictedly, and their mutual relations can be easily grasped. When data points are given a time axis, they can be expressed in a time contour. Studies are conducted about the underground structure, multiple reflection paths divided by it, and characteristics of detour reflection attributable to faults. 4 refs., 9 figs.

  12. Cosmetic Plastic Surgery Statistics

    Science.gov (United States)

    2014 Cosmetic Plastic Surgery Statistics Cosmetic Procedure Trends 2014 Plastic Surgery Statistics Report Please credit the AMERICAN SOCIETY OF PLASTIC SURGEONS when citing statistical data or using ...

  13. A review of methods of analysis in contouring studies for radiation oncology

    International Nuclear Information System (INIS)

    Full text: Inter-observer variability in anatomical contouring is the biggest contributor to uncertainty in radiation treatment planning. Contouring studies are frequently performed to investigate the differences between multiple contours on common datasets. There is, however, no widely accepted method for contour comparisons. The purpose of this study is to review the literature on contouring studies in the context of radiation oncology, with particular consideration of the contouring comparison methods they employ. A literature search, not limited by date, was conducted using Medline and Google Scholar with key words; contour, variation, delineation, inter/intra observer, uncertainty and trial dummy-run. This review includes a description of the contouring processes and contour comparison metrics used. The use of different processes and metrics according to tumour site and other factors were also investigated with limitations described. A total of 69 relevant studies were identified. The most common tumour sites were prostate (26), lung (10), head and neck cancers (8) and breast (7).The most common metric of comparison was volume used 59 times, followed by dimension and shape used 36 times, and centre of volume used 19 times. Of all 69 publications, 67 used a combination of metrics and two used only one metric for comparison. No clear relationships between tumour site or any other factors that may in Auence the contouring process and the metrics used to compare contours were observed from the literature. Further studies are needed to assess the advantages and disadvantages of each metric in various situations.

  14. A Contour-Guided Deformable Image Registration Algorithm for Adaptive Radiotherapy

    CERN Document Server

    Gu, Xuejun; Wang, Jing; Yordy, John; Mell, Loren; Jia, Xun; Jiang, Steve B

    2013-01-01

    In adaptive radiotherapy, deformable image registration is often conducted between the planning CT and treatment CT (or cone beam CT) to generate a deformation vector field (DVF) for dose accumulation and contour propagation. The auto propagated contours on the treatment CT may contain relatively large errors, especially in low contrast regions. A clinician inspection and editing of the propagated contours are frequently needed. The edited contours are able to meet the clinical requirement for adaptive therapy; however, the DVF is still inaccurate and inconsistent with the edited contours. The purpose of this work is to develop a contour-guided deformable image registration (CG-DIR) algorithm to improve the accuracy and consistency of the DVF for adaptive radiotherapy. Incorporation of the edited contours into the registration algorithm is realized by regularizing the objective function of the original demons algorithm with a term of intensity matching between the delineated structures set pairs. The CG-DIR a...

  15. RBF neural network and active circles based algorithm for contours extraction

    Institute of Scientific and Technical Information of China (English)

    Zhou Zhiheng; Zeng Delu; Xie Shengli

    2007-01-01

    For the contours extraction from the images, active contour model and self-organizing map based approach are popular nowadays. But they are still confronted with the problems that the optimization of energy function will trap in local minimums and the contour evolutions greatly depend on the initial contour selection. Addressing to these problems, a contours extraction algorithm based on RBF neural network is proposed here. A series of circles with adaptive radius and center is firstly used to search image feature points that are scattered enough. After the feature points are clustered, a group of radial basis functions are constructed. Using the pixels' intensities and gradients as the input vector, the final object contour can be obtained by the predicting ability of the neural network. The RBF neural network based algorithm is tested on three kinds of images, such as changing topology, complicated background, and blurring or noisy boundary. Simulation results show that the proposed algorithm performs contours extraction greatly.

  16. The precision of visual memory for a complex contour shape measured by a freehand drawing task.

    Science.gov (United States)

    Osugi, Takayuki; Takeda, Yuji

    2013-03-01

    Contour information is an important source for object perception and memory. Three experiments examined the precision of visual short-term memory for complex contour shapes. All used a new procedure that assessed recall memory for holistic information in complex contour shapes: Participants studied, then reproduced (without cues), a contoured shape by freehand drawing. In Experiment 1 memory precision was measured by comparing Fourier descriptors for studied and reproduced contours. Results indicated survival of lower (holistic) frequency information (i.e., ⩽5cycles/perimeter) and loss of higher (detail) frequency information. Secondary tasks placed demands on either verbal memory (Experiment 2) or visual spatial memory (Experiment 3). Neither secondary task interfered with recall of complex contour shapes, suggesting that the memory system maintaining holistic shape information was independent of both the verbal memory system and the visual spatial memory subsystem of visual short-term memory. The nature of memory for complex contour shape is discussed. PMID:23296198

  17. Bariatric surgery in hypothalamic obesity

    Directory of Open Access Journals (Sweden)

    Nathan eBingham

    2012-02-01

    Full Text Available Craniopharyngiomas (CP are epithelial neoplasms generally found in the area of the pituitary and hypothalamus. Despite benign histology, these tumors and/or their treatment often result in significant, debilitating disorders of endocrine, neurological, behavioral, and metabolic systems. Severe obesity is observed in a high percentage of patients with CP resulting in significant comorbidities and negatively impacting quality of life. Obesity occurs as a result of hypothalamic damage and disruption of normal homeostatic mechanisms regulating energy balance. Such pathological weight gain, termed hypothalamic obesity (HyOb, is often severe and refractory to therapy.Unfortunately, neither lifestyle intervention nor pharmacotherapy has proven truly effective in the treatment of CP-HyOb. Given the limited choices and poor results of these treatments, several groups have examined bariatric surgery as a treatment alternative for patients with CP-HyOb. While a large body of evidence exists supporting the use of bariatric surgery in the treatment of exogenous obesity and its comorbidities, its role in the treatment of HyOb has yet to be well defined. To date, the existing literature on bariatric surgery in CP-HyOb is largely limited to case reports and series with short term follow-up. Here we review the current reports on the use of bariatric surgery in the treatment of CP-HyOb. We also compare these results to those reported for other populations of HyOb, including Prader-Willi Syndrome and patients with melanocortin signaling defects. While initial reports of bariatric surgery in CP-HyOb are promising, their limited scope makes it difficult to draw any substantial conclusions as to the long term safety and efficacy of bariatric surgery in CP-HyOb. There continues to be a need for more robust, controlled, prospective trials with long term follow-up in order to better define the role of bariatric surgery in the treatment of all types of hypothalamic

  18. [Ethics in aesthetic surgery].

    Science.gov (United States)

    de Fontaine, S

    2013-09-01

    The use of aesthetic medicine and surgery is increasingly popular, and becomes a true phenomenon of society. Many women and men are asking for such treatments. A large proportion of the population carry the idea that this branch of medicine is a true consumer product. The acts of aesthetic medicine and surgery are not without consequences. They produce important changes in the human body, and carry risks of complications that must be taken into account. The overrated media interest of this subject produce commercial drifts that act against the general health of the patients. The invasive acts of medical aesthetics must be placed in a precise legal and ethical framework to protect the patients. A project of a new Belgian law is on the way, awaiting for publication in "Le Moniteur": this law (proposed by Senator Dominique Tilmans) clarifies the competences required for performing non-surgical aesthetic treatments and specific aesthetic invasive treatments. Other projects of law are being studied, and will concern publicity, information of the public, and rules of private clinics where aesthetic invasive acts are performed. Recent international news have shown, with the PIP breast prosthesis scandal, that surveillance of the medical aesthetic field is mandatory. To provide a better protection of patients, the legislator has decided legislate over the subject.

  19. The hydrological impact of contour trenching in Vietnam

    Science.gov (United States)

    Pramana, K. E. R.; Ertsen, M. W.; Uhlenbrook, S.; de Laat, P.; Nonner, J.

    2009-04-01

    At the foothill in the driest rural area in Vietnam, at Ninh Thuan province, poor farmers cultivate up-land crops during the wet season. The area is about 9 hectares of deforested land with a slope up to 8% and has a geology surface of crusted sands and gravels. Water is scarce during the dry season and runs off rapidly during the wet season. Hence, to provide sustainable water resources and support crop growth, a project started in 2007 aiming introducing contour trenching. The main purpose of contour trenching is to trap run off, increase soil moisture for vegetation growth and recharge the groundwater. In order to investigate the impact of the trenches, a field monitoring program was initiated measuring rainfall, soil moisture content, surface water levels and groundwater levels. Recorded annual rainfall reached 600 mm. The groundwater levels are relatively deep and constant at -8 and -10 meters. The soil moisture content ranged from 3% at the driest condition to 37% below the trench at ponding. Water levels in trenches differed from uphill to downhill with higher levels at the first trench uphill. After ponding, water in the trenches infiltrates within a period of days. In this contribution, available field measurements are analyzed in two ways. First, runoff is analyzed. Immediately after significant rainfall events, the observed ponding levels in the trenches with defined uphill runoff areas can be related to the rainfall. The results show reduction of runoff coefficients per trench in downhill direction. Second, the two dimension numerical saturated-unsaturated model Hydrus 2-D was used to simulate the soil moisture content measurements. Model results confirm that infiltration is a quick process in this area with its loamy sand soils. Based on these analyzes, potential of contour trenches for local water retention and groundwater recharge will be discussed.

  20. Melodic Contour Identification Reflects the Cognitive Threshold of Aging

    Science.gov (United States)

    Jeong, Eunju; Ryu, Hokyoung

    2016-01-01

    Cognitive decline is a natural phenomenon of aging. Although there exists a consensus that sensitivity to acoustic features of music is associated with such decline, no solid evidence has yet shown that structural elements and contexts of music explain this loss of cognitive performance. This study examined the extent and the type of cognitive decline that is related to the contour identification task (CIT) using tones with different pitches (i.e., melodic contours). Both younger and older adult groups participated in the CIT given in three listening conditions (i.e., focused, selective, and alternating). Behavioral data (accuracy and response times) and hemodynamic reactions were measured using functional near-infrared spectroscopy (fNIRS). Our findings showed cognitive declines in the older adult group but with a subtle difference from the younger adult group. The accuracy of the melodic CITs given in the target-like distraction task (CIT2) was significantly lower than that in the environmental noise (CIT1) condition in the older adult group, indicating that CIT2 may be a benchmark test for age-specific cognitive decline. The fNIRS findings also agreed with this interpretation, revealing significant increases in oxygenated hemoglobin (oxyHb) concentration in the younger (p < 0.05 for Δpre - on task; p < 0.01 for Δon – post task) rather than the older adult group (n.s for Δpre - on task; n.s for Δon – post task). We further concluded that the oxyHb difference was present in the brain regions near the right dorsolateral prefrontal cortex. Taken together, these findings suggest that CIT2 (i.e., the melodic contour task in the target-like distraction) is an optimized task that could indicate the degree and type of age-related cognitive decline. PMID:27378907

  1. Percutaneous valve repair for mitral regurgitation using the Carillon Mitral Contour System. Description of the method and case report.

    Science.gov (United States)

    Siminiak, Tomasz; Firek, Ludwik; Jerzykowska, Olga; Kałmucki, Piotr; Wołoszyn, Maciej; Smuszkiewicz, Piotr; Link, Rafał

    2007-03-01

    Mitral regurgitation may result from left ventricular dilatation and cause progression of heart failure. Percutaneous techniques for mitral valve repair are under development. Techniques utilizing a trans-coronary venous approach exploit the anatomical relationship between the mitral annulus and the venous system of the heart. The coronary sinus, great cardiac vein and the origin of the anterior interventricular vein surround the posterior mitral annulus. This enables percutaneous approaches to annuloplasty for mitral regurgitation. Devices can be implanted into the coronary veins that modify the shape and size of the mitral annulus. We present a case of ischaemic mitral regurgitation successfully treated by use of a percutaneous approach, the Carillon Mitral Contour System. Significant reduction of the mitral regurgitation jet was observed. The patient was discharged 4 days after the procedure. During the follow-up visits, the patient showed an improved general condition and increased exercise capacity. Procedural steps are shown in detail and the current status of the coronary sinus based technique is discussed. Percutaneous techniques for mitral valve repair may be an attractive alternative to cardiac surgery in heart failure patients with secondary mitral regurgitation. The Carillon Mitral Contour System is under ongoing clinical evaluation in the AMADEUS trial. PMID:17436155

  2. Gastric bypass surgery

    Science.gov (United States)

    ... Roux-en-Y; Weight-loss surgery - gastric bypass; Obesity surgery - gastric bypass ... bypass surgery is not a quick fix for obesity. It will greatly change your lifestyle. After this surgery, you must eat healthy foods, control portion sizes of ...

  3. Camera motion estimation by tracking contour deformation: Precision analysis

    OpenAIRE

    Alenyà, Guillem; Torras, Carme

    2010-01-01

    An algorithm to estimate camera motion from the progressive deformation of a tracked contour in the acquired video stream has been previously proposed. It relies on the fact that two views of a plane are related by an affinity, whose 6 parameters can be used to derive the 6 degrees-of-freedom of camera motion between the two views. In this paper we evaluate the accuracy of the algorithm. Monte Carlo simulations show that translations parallel to the image plane and rotations about the optical...

  4. SOl-based radial-contour-mode micromechanical disk resonator

    Institute of Scientific and Technical Information of China (English)

    Jia Yingqian; Zhao Zhengping; Yang Yongjun; Hu Xiaodong; Li Qian

    2011-01-01

    This paper reports a radial-contour-mode micromechanical disk resonator for radio frequency applications.This disk resonator with a gold plated layer as the electrodes,was prepared on a silicon-on-insulator wafer,which is supported by an anchor on another silicon wafer through Au-Au thermo-compression bonding.The gap between the disk and the surrounding gold electrodes is 100 nm.The radius of the disk is 20 μm and the thickness is 4.5μm.In results,the resonator shows a resonant frequency of 143 MHz and a quality factor of 5600 in vacuum.

  5. Control of Open Contour Formations of Autonomous Underwater Vehicles

    OpenAIRE

    Uwe Zimmer; Shahab Kalantar

    2008-01-01

    In this paper, we propose a distributed elastic behaviour for a deformable chain-like formation of small autonomous underwater vehicles with the task of forming special shapes which have been explicitly defined or are defined by some iso-contour of an environmental concentration field. In the latter case, the formation has to move in such a way as to meet certain formation parameters as well as adapt to the iso-line. We base our controller on our previous models (for manually controlled end p...

  6. Control of Open Contour Formations of Autonomous Underwater Vehicles

    Directory of Open Access Journals (Sweden)

    Uwe Zimmer

    2008-11-01

    Full Text Available In this paper, we propose a distributed elastic behaviour for a deformable chain-like formation of small autonomous underwater vehicles with the task of forming special shapes which have been explicitly defined or are defined by some iso-contour of an environmental concentration field. In the latter case, the formation has to move in such a way as to meet certain formation parameters as well as adapt to the iso-line. We base our controller on our previous models (for manually controlled end points using general curve evolution theory but will also propose appropriate motions for the end robots of an open chain.

  7. Laser Welding Of Contoured Thin-Wall Housings

    Science.gov (United States)

    Spiegel, Lyle B.; Oleksiak, Carl E.

    1991-01-01

    Superalloy parts joined with less distortion. Carbon dioxide laser beam directed by optics in numerically controlled robot arm welds shell-type turbopump housings having complicated shapes. 5-kW laser, following single programmed three-dimensional pass, produces high-quality, full-penetration weld pass in age-hardenable nickel superalloy. Operator easily programs robot by using teaching pendant to track weld joint and keeps laser focused on workpiece while following contour of shell. Shells welded in rapid succession, with minimal change in setup for each.

  8. Contour optimization of a planar broadband dipole using genetic algorithms

    OpenAIRE

    Vasylenko, Dmytro O.; Dubrovka, Fedor F.; Edenhofer, Peter

    2007-01-01

    The application of genetic algorithm (GA) optimization to the design and analysis for planar broadband dipoles of bow-tie type is presented. Primary attention is given to the analysis of the radiating contour profile of the bow-tie antenna. The planar dipole antenna is proposed for UWB communications in the frequency range 3.1-10.6 GHz. A printed design of the proposed antenna is defined for return loss < -10 dB and antenna gain > 2 dB over the whole frequency range.

  9. SU-E-T-595: Design of a Graphical User Interface for An In-House Monte Carlo Based Treatment Planning System: Planning and Contouring Tools

    International Nuclear Information System (INIS)

    Purpose: An in-house Monte Carlo based treatment planning system (MC TPS) has been developed for modulated electron radiation therapy (MERT). Our preliminary MERT planning experience called for a more user friendly graphical user interface. The current work aimed to design graphical windows and tools to facilitate the contouring and planning process. Methods: Our In-house GUI MC TPS is built on a set of EGS4 user codes namely MCPLAN and MCBEAM in addition to an in-house optimization code, which was named as MCOPTIM. Patient virtual phantom is constructed using the tomographic images in DICOM format exported from clinical treatment planning systems (TPS). Treatment target volumes and critical structures were usually contoured on clinical TPS and then sent as a structure set file. In our GUI program we developed a visualization tool to allow the planner to visualize the DICOM images and delineate the various structures. We implemented an option in our code for automatic contouring of the patient body and lungs. We also created an interface window displaying a three dimensional representation of the target and also showing a graphical representation of the treatment beams. Results: The new GUI features helped streamline the planning process. The implemented contouring option eliminated the need for performing this step on clinical TPS. The auto detection option for contouring the outer patient body and lungs was tested on patient CTs and it was shown to be accurate as compared to that of clinical TPS. The three dimensional representation of the target and the beams allows better selection of the gantry, collimator and couch angles. Conclusion: An in-house GUI program has been developed for more efficient MERT planning. The application of aiding tools implemented in the program is time saving and gives better control of the planning process

  10. “Oriental anthropometry” in plastic surgery

    OpenAIRE

    Senna-Fernandes Vasco

    2008-01-01

    Background : According to Chinese medicine, the acupuncture-points′ (acupoints) locations are proportionally and symmetrically distributed in well-defined compartment zones on the human body surface Oriental Anthropometry" (OA). Acupoints, if considered as aesthetic-loci, might be useful as reference guides in plastic surgery (PS). Aim: This study aimed to use aesthetic-loci as anatomical reference in surgical marking of Aesthetic Plastic Surgery. Method: This was an observational ...

  11. A New Approach for Adipose Tissue Treatment and Body Contouring Using Radiofrequency-Assisted Liposuction

    OpenAIRE

    Paul, Malcolm; Mulholland, Robert Stephen

    2009-01-01

    A new liposuction technology for adipocyte lipolysis and uniform three-dimensional tissue heating and contraction is presented. The technology is based on bipolar radiofrequency energy applied to the subcutaneous adipose tissue and subdermal skin surface. Preliminary clinical results, thermal monitoring, and histologic biopsies of the treated tissue demonstrate rapid preaspiration liquefaction of adipose tissue, coagulation of subcutaneous blood vessels, and uniform sustained heating of tissue.

  12. Theory on the molecular characteristic contour (II)--Molecular intrinsic characteristic contours of several typical organic molecules

    Institute of Scientific and Technical Information of China (English)

    GONG; Lidong; ZHAO; Dongxia; YANG; Zhongzhi

    2005-01-01

    The molecular intrinsic characteristic contour (MICC) is defined based on the classical turning point of electron movement in a molecule. Three typical organic molecules, I.e. Methane, methanol and formic acid, were employed as examples for detailed introduction of our method. Investigations on the cross-sections of MICC provide important information about atomic size changing in the process of forming molecules. The electron density distributions on the MICCs of these molecules were calculated and shown for the first time. Results showed that the electron density distribution on the MICC correlates closely with molecular chemical properties, and it provides a new insight into molecular boundary.

  13. Contoured-gap coaxial guns for imploding plasma liner experiments

    Science.gov (United States)

    Witherspoon, F. D.; Case, A.; Brockington, S.; Cassibry, J. T.; Hsu, S. C.

    2014-10-01

    Arrays of supersonic, high momentum flux plasma jets can be used as standoff compression drivers for generating spherically imploding plasma liners for driving magneto-inertial fusion, hence the name plasma-jet-driven MIF (PJMIF). HyperV developed linear plasma jets for the Plasma Liner Experiment (PLX) at LANL where two guns were successfully tested. Further development at HyperV resulted in achieving the PLX goal of 8000 μg at 50 km/s. Prior work on contoured-gap coaxial guns demonstrated an approach to control the blowby instability and achieved substantial performance improvements. For future plasma liner experiments we propose to use contoured-gap coaxial guns with small Minirailgun injectors. We will describe such a gun for a 60-gun plasma liner experiment. Discussion topics will include impurity control, plasma jet symmetry and topology (esp. related to uniformity and compactness), velocity capability, and techniques planned for achieving gun efficiency of >50% using tailored impedance matched pulse forming networks. Mach2 and UAH SPH code simulations will be included. Work supported by US DOE DE-FG02-05ER54810.

  14. A NOVEL FAST MOVING OBJECT CONTOUR TRACKING ALGORITHM

    Institute of Scientific and Technical Information of China (English)

    An Guocheng; Yang Hao; Wu Zhenyang

    2009-01-01

    If a somewhat fast moving object exists in a complicated tracking environment, snake's nodes may fall into the inaccurate local minima. We propose a mean shift snake algorithm to solve this problem. However, if the object goes beyond the limits of mean shift snake module operation in successive sequences, mean shift snake's nodes may also fall into the local minima in their moving to the new object position. This paper presents a motion compensation strategy by using particle filter; therefore a new Particle Filter Mean Shift Snake (PFMSS) algorithm is proposed which combines particle filter with mean shift snake to fulfill the estimation of the fast moving object contour. Firstly, the fast moving object is tracked by particle filter to create a coarse position which is used to initialize the mean shift algorithm. Secondly, the whole relevant motion information is used to compensate the snake's node positions. Finally, snake algorithm is used to extract the exact object contour and the useful information of the object is fed back. Some real world sequences are tested and the results show that the novel tracking method have a good performance with high accuracy in solving the fast moving problems in cluttered background.

  15. Analysis of trabecular bone microstructure using contour tree connectivity.

    Science.gov (United States)

    Aydogan, Dogu Baran; Moritz, Niko; Aro, Hannu T; Hyttinen, Jari

    2013-01-01

    Millions of people worldwide suffer from fragility fractures, which cause significant morbidity, financial costs and even mortality. The gold standard to quantify structural properties of trabecular bone is based on the morphometric parameters obtained from microCT images of clinical bone biopsy specimens. The currently used image processing approaches are not able to fully explain the variation in bone strength. In this study, we introduce the contour tree connectivity (CTC) as a novel morphometric parameter to study trabecular bone quality. With CTC, we calculate a new connectivity measure for trabecular bone by using contour tree representation of binary images and algebraic graph theory. To test our approach, we use trabecular bone biopsies obtained from 55 female patients. We study the correlation of CTC with biomechanical test results as well as other morphometric parameters obtained from microCT. The results based on our dataset show that CTC is the 3rd best predictive feature of ultimate bone strength after bone volume fraction and degree of anisotropy. PMID:24579169

  16. Melodic Contour Identification Reflects the Cognitive Threshold of Aging.

    Science.gov (United States)

    Jeong, Eunju; Ryu, Hokyoung

    2016-01-01

    Cognitive decline is a natural phenomenon of aging. Although there exists a consensus that sensitivity to acoustic features of music is associated with such decline, no solid evidence has yet shown that structural elements and contexts of music explain this loss of cognitive performance. This study examined the extent and the type of cognitive decline that is related to the contour identification task (CIT) using tones with different pitches (i.e., melodic contours). Both younger and older adult groups participated in the CIT given in three listening conditions (i.e., focused, selective, and alternating). Behavioral data (accuracy and response times) and hemodynamic reactions were measured using functional near-infrared spectroscopy (fNIRS). Our findings showed cognitive declines in the older adult group but with a subtle difference from the younger adult group. The accuracy of the melodic CITs given in the target-like distraction task (CIT2) was significantly lower than that in the environmental noise (CIT1) condition in the older adult group, indicating that CIT2 may be a benchmark test for age-specific cognitive decline. The fNIRS findings also agreed with this interpretation, revealing significant increases in oxygenated hemoglobin (oxyHb) concentration in the younger (p like distraction) is an optimized task that could indicate the degree and type of age-related cognitive decline. PMID:27378907

  17. Segmentation of Coronal Holes Using Active Contours Without Edges

    Science.gov (United States)

    Boucheron, L. E.; Valluri, M.; McAteer, R. T. J.

    2016-10-01

    An application of active contours without edges is presented as an efficient and effective means of extracting and characterizing coronal holes. Coronal holes are regions of low-density plasma on the Sun with open magnetic field lines. The detection and characterization of these regions is important for testing theories of their formation and evolution, and also from a space weather perspective because they are the source of the fast solar wind. Coronal holes are detected in full-disk extreme ultraviolet (EUV) images of the corona obtained with the Solar Dynamics Observatory Atmospheric Imaging Assembly (SDO/AIA). The proposed method detects coronal boundaries without determining any fixed intensity value in the data. Instead, the active contour segmentation employs an energy-minimization in which coronal holes are assumed to have more homogeneous intensities than the surrounding active regions and quiet Sun. The segmented coronal holes tend to correspond to unipolar magnetic regions, are consistent with concurrent solar wind observations, and qualitatively match the coronal holes segmented by other methods. The means to identify a coronal hole without specifying a final intensity threshold may allow this algorithm to be more robust across multiple datasets, regardless of data type, resolution, and quality.

  18. Some effects of intonation contour on sentence intelligibility

    Science.gov (United States)

    Hillenbrand, James M.

    2003-10-01

    This experiment was designed to measure the effects of pitch movement on sentence intelligibility. A source-filter synthesizer was used to generate three synthetic versions of 60 sentences drawn from the TIMIT multi-talker speech database: (1) an original pitch (OP) condition in which the fundamental frequency (F0) contour matched that of the original utterance, (2) a monotone pitch (MP) condition in which F0 was held constant at the median value measured from the original utterance, and (3) an inverted pitch (IP) condition in which the F0 contour was reflected around the median F0 value (i.e., pitch rises were changed to pitch drops, and vice versa). Results from 30 listeners showed a small but statistically reliable drop in intelligibility from the OP condition to either the MP or IP condition, with no difference between the MP and IP conditions. A second group of 22 listeners was tested on the same task, but with overall sentence intelligibility reduced by running all signals through a 2-kHz low-pass filter. As with the unfiltered signals, intelligibility was reduced for the MP and IP conditions relative to OP; however, the decrements in intelligibility were somewhat larger for the filtered signals, and inverting pitch caused a larger intelligibility decrement than flattening pitch.

  19. Fast Virtual Stenting with Active Contour Models in Intracranical Aneurysm.

    Science.gov (United States)

    Zhong, Jingru; Long, Yunling; Yan, Huagang; Meng, Qianqian; Zhao, Jing; Zhang, Ying; Yang, Xinjian; Li, Haiyun

    2016-02-15

    Intracranial stents are becoming increasingly a useful option in the treatment of intracranial aneurysms (IAs). Image simulation of the releasing stent configuration together with computational fluid dynamics (CFD) simulation prior to intervention will help surgeons optimize intervention scheme. This paper proposed a fast virtual stenting of IAs based on active contour model (ACM) which was able to virtually release stents within any patient-specific shaped vessel and aneurysm models built on real medical image data. In this method, an initial stent mesh was generated along the centerline of the parent artery without the need for registration between the stent contour and the vessel. Additionally, the diameter of the initial stent volumetric mesh was set to the maximum inscribed sphere diameter of the parent artery to improve the stenting accuracy and save computational cost. At last, a novel criterion for terminating virtual stent expanding that was based on the collision detection of the axis aligned bounding boxes was applied, making the stent expansion free of edge effect. The experiment results of the virtual stenting and the corresponding CFD simulations exhibited the efficacy and accuracy of the ACM based method, which are valuable to intervention scheme selection and therapy plan confirmation.

  20. A statistics-based pitch contour model for Mandarin speech.

    Science.gov (United States)

    Chen, Sin-Horng; Lai, Wen-Hsing; Wang, Yih-Ru

    2005-02-01

    A statistics-based syllable pitch contour model for Mandarin speech is proposed. This approach takes the mean and the shape of a syllable log-pitch contour as two basic modeling units and considers several affecting factors that contribute to their variations. The affecting factors include the speaker, prosodic state (which essentially represents the high-level linguistic components of F0 and will be explained more clearly in Sec. I), tone, and initial and final syllable classes. The parameters of the two modeling units were automatically estimated using the expectation-maximization (EM) algorithm. Experimental results showed that the root mean squared errors (RMSEs) obtained in the closed and open tests in the reconstructed pitch period were 0.362 and 0.373 ms, respectively. This model provides a way to separate the effects of several major factors. All of the inferred values of the affecting factors were in close agreement with our prior linguistic knowledge. It also gives a quantitative and more complete description of the coarticulation effect of neighboring tones rather than conventional qualitative descriptions of the tone sandhi rules. In addition, the model can provide useful cues to determine the prosodic phrase boundaries, including those occurring at intersyllable locations, with or without punctuation marks. PMID:15759710

  1. Segmentation of Coronal Holes Using Active Contours Without Edges

    Science.gov (United States)

    Boucheron, L. E.; Valluri, M.; McAteer, R. T. J.

    2016-09-01

    An application of active contours without edges is presented as an efficient and effective means of extracting and characterizing coronal holes. Coronal holes are regions of low-density plasma on the Sun with open magnetic field lines. The detection and characterization of these regions is important for testing theories of their formation and evolution, and also from a space weather perspective because they are the source of the fast solar wind. Coronal holes are detected in full-disk extreme ultraviolet (EUV) images of the corona obtained with the Solar Dynamics Observatory Atmospheric Imaging Assembly (SDO/AIA). The proposed method detects coronal boundaries without determining any fixed intensity value in the data. Instead, the active contour segmentation employs an energy-minimization in which coronal holes are assumed to have more homogeneous intensities than the surrounding active regions and quiet Sun. The segmented coronal holes tend to correspond to unipolar magnetic regions, are consistent with concurrent solar wind observations, and qualitatively match the coronal holes segmented by other methods. The means to identify a coronal hole without specifying a final intensity threshold may allow this algorithm to be more robust across multiple datasets, regardless of data type, resolution, and quality.

  2. Visually-salient contour detection using a V1 neural model with horizontal connections

    CERN Document Server

    Loxley, P N

    2011-01-01

    A convolution model which accounts for neural activity dynamics in the primary visual cortex is derived and used to detect visually salient contours in images. Image inputs to the model are modulated by long-range horizontal connections, allowing contextual effects in the image to determine visual saliency, i.e. line segments arranged in a closed contour elicit a larger neural response than line segments forming background clutter. The model is tested on 3 types of contour, including a line, a circular closed contour, and a non-circular closed contour. Using a modified association field to describe horizontal connections the model is found to perform well for different parameter values. For each type of contour a different facilitation mechanism is found. Operating as a feed-forward network, the model assigns saliency by increasing the neural activity of line segments facilitated by the horizontal connections. Alternatively, operating as a feedback network, the model can achieve further improvement over sever...

  3. Ups and Downs in Auditory Development: Preschoolers' Sensitivity to Pitch Contour and Timbre.

    Science.gov (United States)

    Creel, Sarah C

    2016-03-01

    Much research has explored developing sound representations in language, but less work addresses developing representations of other sound patterns. This study examined preschool children's musical representations using two different tasks: discrimination and sound-picture association. Melodic contour--a musically relevant property--and instrumental timbre, which is (arguably) less musically relevant, were tested. In Experiment 1, children failed to associate cartoon characters to melodies with maximally different pitch contours, with no advantage for melody preexposure. Experiment 2 also used different-contour melodies and found good discrimination, whereas association was at chance. Experiment 3 replicated Experiment 2, but with a large timbre change instead of a contour change. Here, discrimination and association were both excellent. Preschool-aged children may have stronger or more durable representations of timbre than contour, particularly in more difficult tasks. Reasons for weaker association of contour than timbre information are discussed, along with implications for auditory development. PMID:25846115

  4. Dependence of V2 illusory contour response on V1 cell properties and topographic organization.

    Science.gov (United States)

    Cohen, Amelia; Buia, Calin; Tiesinga, Paul

    2014-06-01

    An illusory contour is an image that is perceived as a contour in the absence of typical contour characteristics, such as a change in luminance or chromaticity across the stimulus. In cats and primates, cells that respond to illusory contours are sparse in cortical area V1, but are found in greater numbers in cortical area V2. We propose a model capable of illusory contour detection that is based on a realistic topographic organization of V1 cells, which reproduces the responses of individual cell types measured experimentally. The model allows us to explain several experimentally observed properties of V2 cells including variability in orientation tuning and inducer spacing preference. As a practical application, the model can be used to estimate the relationship between the severity of a cortical injury in the primary visual cortex and the deterioration of V2 cell responses to real and illusory contours. PMID:24801874

  5. Shape Contour Feature Extraction and Recognition of Human Behavior Motion%人体行为动作的形状轮廓特征提取及识别

    Institute of Scientific and Technical Information of China (English)

    胡石; 梅雪

    2012-01-01

    A method for respectively applying Fourier transform and edge wavelet moments descriptor to recognize human behavioral motion is proposed. In the process of contour feature extraction, contraposing not single line between ccntroid and contour of concave-convex complex images, a kind of directional distance contour description matrix with multi-lines is proposed. Some simulation experiments are done about two kinds of human bodies and four kinds of behavioral motion, experimental results show the edge wavelet moments descriptor has a good description and recognition rates to local feature of shape contour.%将傅里叶变换与边缘小波矩描述子相结合,提出一种人体行为动作的识别方法.凹凸复杂图像的质心到轮廓为非单一直线,据此,给出一种多段定向距离轮廓描述矩阵,实现轮廓特征的提取.分别对2类人体和4种行为动作进行仿真实验,结果表明,边缘小波矩描述子能较好地体现人体行为动作的形状轮廓部特征,具有较高的识别率.

  6. A novel three-dimensional smile analysis based on dynamic evaluation of facial curve contour

    OpenAIRE

    Yi Lin; Han Lin; Qiuping Lin; Jinxin Zhang; Ping Zhu; Yao Lu; Zhi Zhao; Jiahong Lv; Mln Kyeong Lee; Yue Xu

    2016-01-01

    The influence of three-dimensional facial contour and dynamic evaluation decoding on factors of smile esthetics is essential for facial beauty improvement. However, the kinematic features of the facial smile contour and the contribution from the soft tissue and underlying skeleton are uncharted. Here, the cheekbone-maxilla contour and nasolabial fold were combined into a “smile contour” delineating the overall facial topography emerges prominently in smiling. We screened out the stable and un...

  7. Model Predictive Approach to Precision Contouring Control for Feed Drive Systems

    OpenAIRE

    A. E. M.; N. Uchyiama,

    2010-01-01

    Problem statement: High precision machining requires high capability of multi-axis feed drive systems to follow specified contour accurately. Although each feed drive axis is controlled independently in many industrial applications such as X-Y tables and Computer Numerical Control (CNC) machines, machining precision is evaluated by error components orthogonal to desired contour curve. Contouring controller design is required for precision machining, which should consider disturbance and dynam...

  8. [What do general, abdominal and vascular surgeons need to know on plastic surgery - aspects of plastic surgery in the field of general, abdominal and vascular surgery].

    Science.gov (United States)

    Damert, H G; Altmann, S; Stübs, P; Infanger, M; Meyer, F

    2015-02-01

    There is overlap between general, abdominal and vascular surgery on one hand and plastic surgery on the other hand, e.g., in hernia surgery, in particular, recurrent hernia, reconstruction of the abdominal wall or defect closure after abdominal or vascular surgery. Bariatric operations involve both special fields too. Plastic surgeons sometimes use skin and muscle compartments of the abdominal wall for reconstruction at other regions of the body. This article aims to i) give an overview about functional, anatomic and clinical aspects as well as the potential of surgical interventions in plastic surgery. General/abdominal/vascular surgeons can benefit from this in their surgical planning and competent execution of their own surgical interventions with limited morbidity/lethality and an optimal, in particular, functional as well as aesthetic outcome, ii) support the interdisciplinary work of general/abdominal/vascular and plastic surgery, and iii) provide a better understanding of plastic surgery and its profile of surgical interventions and options.

  9. Model Predictive Approach to Precision Contouring Control for Feed Drive Systems

    Directory of Open Access Journals (Sweden)

    A. E. M.

    2010-01-01

    Full Text Available Problem statement: High precision machining requires high capability of multi-axis feed drive systems to follow specified contour accurately. Although each feed drive axis is controlled independently in many industrial applications such as X-Y tables and Computer Numerical Control (CNC machines, machining precision is evaluated by error components orthogonal to desired contour curve. Contouring controller design is required for precision machining, which should consider disturbance and dynamics variation such as friction, cutting force and workpiece mass change. Approach: This study applied model predictive design to contouring control systems. Model predictive control utilized an explicit process model and tracking error dynamics to predict the future behavior of a plant and hence it is effective for precision machining in machine tool feed drives. To improve the contouring performance, a new performance index was proposed in which error components orthogonal to the desired contour curve are more important than tracking errors with respect to each feed drive axis. Controller parameters were calculated in real time by solving an optimization problem. Results: The proposed controller was evaluated by computer simulation for circular and non-circular trajectories. Weighting factors of performance index terms were used as tuning factors of the proposed controller. Simulation results showed that a better contouring performance can be obtained by choosing of the weighting factors in performance index items appropriately. Conclusion/Recommendations: A model predictive contouring controller for biaxial feed drive systems was presented. Simulation results demonstrated that the proposed approach can significantly improve the contouring accuracy.

  10. A B-spline active contour model based on finite element method

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    A B-spline active contour model based on finite element method is presented, into which the advantages of a B-spline active contour attributing to its fewer parameters and its smoothness is built accompanied with reduced computational complexity and better numerical stability resulted from the finite element method. In this model, a cubic B-spline segment is taken as an element, and the finite element method is adopted to solve the energy minimization problem of the B-spline active contour, thus to implement image segmentation. Experiment results verify that this method is efficient for B-spline active contour, which attains stable, accurate and faster convergence.

  11. Polygonal Approximation of Contour Shapes Using Corner Detectors

    Directory of Open Access Journals (Sweden)

    Hermilo Sánchez‐Cruz

    2009-12-01

    Full Text Available A great amount of corner detectors that appear in literature are based on using the Freeman chain code of eight directions,which is used to represent contour shapes. We propose a new method for corner detection based on a three‐symbol chain coderepresentation, which requires lower storage memory and an easy way to obtain shape corners. We compare it with fiveexisting methods, which are well known in the literature, giving our method a better performance. Furthermore, in order toreconstruct the original shapes through polygonal approximations, we propose an error parameter to quantify the efficiency.This can be accomplished by considering the redundancy of points produced when looking for corners and when computing thedifference between the original region and the approximated polygon.

  12. THE CONTOUR METHOD: SIMPLE 2-D MAPPING OF RESIDUAL STRESSES

    Energy Technology Data Exchange (ETDEWEB)

    M. PRIME; A. GONZALES

    2000-06-01

    We present an entirely new method for measuring residual stress that is extremely simple to apply yet more powerful than existing techniques. In this method, a part is carefully cut in two. The contour of the resulting new surface is measured to determine the displacements normal to the surface caused by the release of the residual stresses. Analytically, the opposite of these measured displacements are applied as boundary conditions to the surface in a finite element model. By Bueckner's superposition principle, this gives the original residual stresses normal to the plane of the cut. Unlike other relaxation methods for measuring residual stress, the measured data can be used to solve directly for the stresses without a tedious inversion technique. At the same time, an arbitrary two-dimensional variation in stresses can be determined. We demonstrate the method on a steel specimen with a known residual stress profile.

  13. Statistical region-based active contours with exponential family observations

    CERN Document Server

    Lecellier, François; Fadili, Jalal; Aubert, Gilles; Revenu, Marinette

    2008-01-01

    In this paper, we focus on statistical region-based active contour models where image features (e.g. intensity) are random variables whose distribution belongs to some parametric family (e.g. exponential) rather than confining ourselves to the special Gaussian case. Using shape derivation tools, our effort focuses on constructing a general expression for the derivative of the energy (with respect to a domain) and derive the corresponding evolution speed. A general result is stated within the framework of multi-parameter exponential family. More particularly, when using Maximum Likelihood estimators, the evolution speed has a closed-form expression that depends simply on the probability density function, while complicating additive terms appear when using other estimators, e.g. moments method. Experimental results on both synthesized and real images demonstrate the applicability of our approach.

  14. Equivalence of Two Contour Prescriptions in Superstring Perturbation Theory

    CERN Document Server

    Sen, Ashoke

    2016-01-01

    Conventional superstring perturbation theory based on the world-sheet approach gives divergent results for the S-matrix whenever the total center of mass energy of the incoming particles exceeds the threshold of production of any final state consistent with conservation laws. Two systematic approaches have been suggested for dealing with this difficulty. The first one involves deforming the integration cycles over the moduli space of punctured Riemann surfaces into complexified moduli space. The second one treats the amplitude as a sum of superstring field theory Feynman diagrams and deforms the integration contours over loop energies of the Feynman diagram into the complex plane. In this paper we establish the equivalence of the two prescriptions to all orders in perturbation theory. Since the second approach is known to lead to unitary amplitudes, this establishes the consistency of the first prescription with unitarity.

  15. New method of 2-dimensional metrology using mask contouring

    Science.gov (United States)

    Matsuoka, Ryoichi; Yamagata, Yoshikazu; Sugiyama, Akiyuki; Toyoda, Yasutaka

    2008-10-01

    We have developed a new method of accurately profiling and measuring of a mask shape by utilizing a Mask CD-SEM. The method is intended to realize high accuracy, stability and reproducibility of the Mask CD-SEM adopting an edge detection algorithm as the key technology used in CD-SEM for high accuracy CD measurement. In comparison with a conventional image processing method for contour profiling, this edge detection method is possible to create the profiles with much higher accuracy which is comparable with CD-SEM for semiconductor device CD measurement. This method realizes two-dimensional metrology for refined pattern that had been difficult to measure conventionally by utilizing high precision contour profile. In this report, we will introduce the algorithm in general, the experimental results and the application in practice. As shrinkage of design rule for semiconductor device has further advanced, an aggressive OPC (Optical Proximity Correction) is indispensable in RET (Resolution Enhancement Technology). From the view point of DFM (Design for Manufacturability), a dramatic increase of data processing cost for advanced MDP (Mask Data Preparation) for instance and surge of mask making cost have become a big concern to the device manufacturers. This is to say, demands for quality is becoming strenuous because of enormous quantity of data growth with increasing of refined pattern on photo mask manufacture. In the result, massive amount of simulated error occurs on mask inspection that causes lengthening of mask production and inspection period, cost increasing, and long delivery time. In a sense, it is a trade-off between the high accuracy RET and the mask production cost, while it gives a significant impact on the semiconductor market centered around the mask business. To cope with the problem, we propose the best method of a DFM solution using two-dimensional metrology for refined pattern.

  16. Bathymetric Contours, Lidar Contours, Published in 2008, 1:600 (1in=50ft) scale, LaCrosse County Zoning Planning & Land Information.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Bathymetric Contours dataset, published at 1:600 (1in=50ft) scale, was produced all or in part from LIDAR information as of 2008. It is described as 'Lidar...

  17. Contours, Hawaii (Big Island) Hypsography - 40 ft Contour Interval, Published in 2004, 1:24000 (1in=2000ft) scale, U.S. Geological Survey.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:24000 (1in=2000ft) scale, was produced all or in part from Orthoimagery information as of 2004. It is described as 'Hawaii...

  18. Bathymetric Contours - LAKE_BATHYMETRY_IDNR_IN: Bathymetric Contours for Selected Lakes in Indiana (Indiana Department of Natural Resources, Polygon Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — LAKE_BATHYMETRY_IDNR_IN.SHP provides bathymetric contours for the following 85 lakes in Indiana, with depths calculated from the average shoreline of each lake:...

  19. Retroperitoneal Sarcoma Target Volume and Organ at Risk Contour Delineation Agreement Among NRG Sarcoma Radiation Oncologists

    Energy Technology Data Exchange (ETDEWEB)

    Baldini, Elizabeth H., E-mail: ebaldini@partners.org [Department of Radiation Oncology, Dana-Farber Cancer Institute, Brigham and Women' s Hospital, Boston, Massachusetts (United States); Abrams, Ross A. [Department of Radiation Oncology, Rush University Medical Center, Chicago, Illinois (United States); Bosch, Walter [Department of Radiation Oncology, Washington University, St. Louis, Missouri (United States); Roberge, David [Department of Radiation Oncology, Centre Hospitalier de l' Universite de Montreal, Montreal, Quebec (Canada); Haas, Rick L.M. [Department of Radiotherapy, Netherlands Cancer Institute, Amsterdam (Netherlands); Catton, Charles N. [Department of Radiation Oncology, Princess Margaret Cancer Centre, Toronto, Ontario (Canada); Indelicato, Daniel J. [Department of Radiation Oncology, University of Florida Medical Center, Jacksonville, Florida (United States); Olsen, Jeffrey R. [Department of Radiation Oncology, Washington University, St. Louis, Missouri (United States); Deville, Curtiland [Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania (United States); Chen, Yen-Lin [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States); Finkelstein, Steven E. [Translational Research Consortium, 21st Century Oncology, Scottsdale, Arizona (United States); DeLaney, Thomas F. [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States); Wang, Dian [Department of Radiation Oncology, Rush University Medical Center, Chicago, Illinois (United States)

    2015-08-01

    Purpose: The purpose of this study was to evaluate the variability in target volume and organ at risk (OAR) contour delineation for retroperitoneal sarcoma (RPS) among 12 sarcoma radiation oncologists. Methods and Materials: Radiation planning computed tomography (CT) scans for 2 cases of RPS were distributed among 12 sarcoma radiation oncologists with instructions for contouring gross tumor volume (GTV), clinical target volume (CTV), high-risk CTV (HR CTV: area judged to be at high risk of resulting in positive margins after resection), and OARs: bowel bag, small bowel, colon, stomach, and duodenum. Analysis of contour agreement was performed using the simultaneous truth and performance level estimation (STAPLE) algorithm and kappa statistics. Results: Ten radiation oncologists contoured both RPS cases, 1 contoured only RPS1, and 1 contoured only RPS2 such that each case was contoured by 11 radiation oncologists. The first case (RPS 1) was a patient with a de-differentiated (DD) liposarcoma (LPS) with a predominant well-differentiated (WD) component, and the second case (RPS 2) was a patient with DD LPS made up almost entirely of a DD component. Contouring agreement for GTV and CTV contours was high. However, the agreement for HR CTVs was only moderate. For OARs, agreement for stomach, bowel bag, small bowel, and colon was high, but agreement for duodenum (distorted by tumor in one of these cases) was fair to moderate. Conclusions: For preoperative treatment of RPS, sarcoma radiation oncologists contoured GTV, CTV, and most OARs with a high level of agreement. HR CTV contours were more variable. Further clarification of this volume with the help of sarcoma surgical oncologists is necessary to reach consensus. More attention to delineation of the duodenum is also needed.

  20. Can Images Obtained With High Field Strength Magnetic Resonance Imaging Reduce Contouring Variability of the Prostate?

    International Nuclear Information System (INIS)

    Purpose: The objective of this study is to determine whether there is less contouring variability of the prostate using higher-strength magnetic resonance images (MRI) compared with standard MRI and computed tomography (CT). Methods and Materials: Forty patients treated with prostate brachytherapy were accrued to a prospective study that included the acquisition of 1.5-T MR and CT images at specified time points. A subset of 10 patients had additional 3.0-T MR images acquired at the same time as their 1.5-T MR scans. Images from each of these patients were contoured by 5 radiation oncologists, with a random subset of patients repeated to quantify intraobserver contouring variability. To minimize bias in contouring the prostate, the image sets were placed in folders in a random order with all identifiers removed from the images. Results: Although there was less interobserver contouring variability in the overall prostate volumes in 1.5-T MRI compared with 3.0-T MRI (p < 0.01), there was no significant differences in contouring variability in the different regions of the prostate between 1.5-T MRI and 3.0-T MRI. MRI demonstrated significantly less interobserver contouring variability in both 1.5-T and 3.0-T compared with CT in overall prostate volumes (p < 0.01, p = 0.01), with the greatest benefits being appreciated in the base of the prostate. Overall, there was less intraobserver contouring variability than interobserver contouring variability for all of the measurements analyzed. Conclusions: Use of 3.0-T MRI does not demonstrate a significant improvement in contouring variability compared with 1.5-T MRI, although both magnetic strengths demonstrated less contouring variability compared with CT.

  1. Cosmetic Surgery and the Cultural Construction of Beauty

    Science.gov (United States)

    Blair, Lorrie; Shalmon, Maya

    2005-01-01

    Throughout history, certain members of nearly all cultures have deliberately altered their body's natural appearance. Today, people live in a time when medicine can cure the body and also reshape it. Hence, many people use biomedical means, such as steroids and hormones to alter their bodies. Additionally, cosmetic surgery is becoming increasingly…

  2. Weight Loss Surgery

    Science.gov (United States)

    Weight loss surgery helps people with extreme obesity to lose weight. It may be an option if you ... caused by obesity. There are different types of weight loss surgery. They often limit the amount of food ...

  3. Spine surgery - discharge

    Science.gov (United States)

    ... Vertebral interbody fusion - discharge; Posterior spinal fusion - discharge; Arthrodesis - discharge; Anterior spinal fusion - discharge; Spine surgery - spinal fusion - discharge Images Spinal surgery -- cervical - series References Agrawal BM, Zeidman SM, Rhines L, ...

  4. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... best performed by a trained surgeon with specialized education and training. Click here to find out more. Facial Cosmetic Surgery Facial Cosmetic Surgery Extensive education and training in surgical procedures involving skin, muscle, ...

  5. Refractive corneal surgery - discharge

    Science.gov (United States)

    ... after surgery, it should be okay to use artificial tears. Check with your doctor. Do NOT wear contact lenses on the eye that had surgery, even if you have blurry vision. Do NOT use any makeup, creams, or lotions ...

  6. Bariatric Surgery Misconceptions

    Science.gov (United States)

    ... from depression or anxiety and to have lower self-esteem and overall quality of life than someone who ... is a Candidate for Bariatric Surgery? Childhood and Adolescent Obesity Find a Provider Benefits of Bariatric Surgery ...

  7. Cosmetic ear surgery

    Science.gov (United States)

    Otoplasty; Ear pinning; Ear surgery - cosmetic; Ear reshaping; Pinnaplasty ... Cosmetic ear surgery may be done in the surgeon's office, an outpatient clinic, or a hospital. It can be performed under ...

  8. Hip fracture surgery

    Science.gov (United States)

    ... neck fracture repair; Trochanteric fracture repair; Hip pinning surgery; Osteoarthritis-hip ... You may receive general anesthesia before this surgery. This means ... spinal anesthesia. With this kind of anesthesia, medicine is ...

  9. Coronary Artery Bypass Surgery

    Science.gov (United States)

    ... don't help, you may need coronary artery bypass surgery. The surgery creates a new path for ... narrowed area or blockage. This allows blood to bypass (get around) the blockage. Sometimes people need more ...

  10. Robotic liver surgery.

    Science.gov (United States)

    Leung, Universe; Fong, Yuman

    2014-10-01

    Robotic surgery is an evolving technology that has been successfully applied to a number of surgical specialties, but its use in liver surgery has so far been limited. In this review article we discuss the challenges of minimally invasive liver surgery, the pros and cons of robotics, the evolution of medical robots, and the potentials in applying this technology to liver surgery. The current data in the literature are also presented. PMID:25392840

  11. MOCK SURGERIES IN AYURVEDA

    OpenAIRE

    Bali Yogitha

    2012-01-01

    The present trend is very well aware of mock tests, exams and even the mock surgeries that are very common in healthcare and play an important role in providing the surgeons, the necessary practical knowledge and expertise in their specialized field. In addition, patients also get benefited by the mock surgeries by having the complete knowledge before they undergo any surgery. The same concept of mock or the experimental surgeries can be found explained centuries ago by Susrutha, father of bo...

  12. Psychosomatic disturbances and cosmetic surgery.

    Science.gov (United States)

    Harth, Wolfgang; Hermes, Barbara

    2007-09-01

    Medical activity in recent years has experienced a marked expansion of possibilities for aesthetic surgery, usually requested by patients. Especially in dermatology, an increasing demand for and use of doctor/medical services by healthy individuals has resulted in a drastic change to cosmetic dermatology. The request for cosmetic surgery is emotionally or psychosocially motivated. Patients with psychological disturbances sometimes push aside possible risks and complications or deny side effects and interactions of the procedures. Subjective impairments of appearance, feelings of inferiority and social pho-bias may be in the background of somatizing disorders. These emotional disorders, such as body dysmorphic disorder, personality disorder or polysurgical addiction, often remain undiscovered but should be excluded in any patient receiving cosmetic procedures. PMID:17760893

  13. Pediatric heart surgery

    Science.gov (United States)

    Heart surgery - pediatric; Heart surgery for children; Acquired heart disease; Heart valve surgery - children ... There are many kinds of heart defects. Some are minor, and others are more serious. Defects can occur inside the heart or in the large blood vessels ...

  14. Residual stress measurement of EB-welded plates with contour method. Part 2: FEM analysis of contour profiles

    Energy Technology Data Exchange (ETDEWEB)

    Romppanen, A.-J.; Immonen, E. [Process Flow Oy, Turku (Finland)

    2013-12-15

    The residual stresses formed as a result of Electronic Beam welding (EB-welding) in copper are investigated by Posiva. In the present study, residual stresses of EB-welded copper plates were studied with contour method. In the method eleven copper plates (X436 - X440 and X453 - X458) were cut in half with wire electric discharge machining (EDM) after which the deformation due to stress relaxation was measured with coordinate measurement system. The measured data was then used as boundary displacement data for the FEM analyses, in which the corresponding residual stresses were calculated. Before giving the corresponding displacement boundary conditions to the FE models, the deformation data was processed and smoothed appropriately. The residual stress levels of the copper plates were found to be around 40 - 55 MPa at maximum. This corresponds to other reported residual stress measurements and current state of knowledge with this material in Posiva. (orig.)

  15. SU-E-J-226: Propagation of Pancreas Target Contours On Respiratory Correlated CT Images Using Deformable Image Registration

    Energy Technology Data Exchange (ETDEWEB)

    Liu, F [Rhode Island Hospital / Brown University, Providence, RI (United States); Yorke, E; Mageras, G; Goodman, K [Memorial Sloan-Kettering Cancer Center, NY, NY (United States)

    2014-06-01

    Purpose: Respiratory Correlated CT (RCCT) scans to assess intra-fraction motion among pancreatic cancer patients undergoing radiotherapy allow for dose sparing of normal tissues, in particular for the duodenum. Contour propagation of the gross tumor volume (GTV) from one reference respiratory phase to 9 other phases is time consuming. Deformable image registration (DIR) has been successfully used for high contrast disease sites but lower contrast for pancreatic tumors may compromise accuracy. This study evaluates the accuracy of Fast Free Form (FFF) registration-based contour propagation of the GTV on RCCT scans of pancreas cancer patients. Methods: Twenty-four pancreatic cancer patients were retrospectively studied; 20 had tumors in the pancreatic head/neck, 4 in the body/tail. Patients were simulated with RCCT and images were sorted into 10 respiratory phases. A radiation oncologist manually delineated the GTV for 5 phases (0%, 30%, 50%, 70% and 90%). The FFF algorithm was used to map deformations between the EE (50%) phase and each of the other 4 phases. The resultant deformation fields served to propagate GTV contours from EE to the other phases. The Dice Similarity Coefficient (DSC), which measures agreement between the DIR-propagated and manually-delineated GTVs, was used to quantitatively examine DIR accuracy. Results: Average DSC over all scans and patients is 0.82 and standard deviation is 0.09 (DSC range 0.97–0.57). For GTV volumes above and below the median volume of 20.2 cc, a Wilcoxon rank-sum test shows significantly different DSC (p=0.0000002). For the GTVs above the median volume, average +/− SD is 0.85 +/− 0.07; and for the GTVs below, the average +/− SD is 0.75 +/−0.08. Conclusion: For pancreatic tumors, the FFF DIR algorithm accurately propagated the GTV between the images in different phases of RCCT, with improved performance for larger tumors.

  16. Fast marching over the 2D Gabor magnitude domain for tongue body segmentation

    Science.gov (United States)

    Cui, Zhenchao; Zhang, Hongzhi; Zhang, David; Li, Naimin; Zuo, Wangmeng

    2013-12-01

    Tongue body segmentation is a prerequisite to tongue image analysis and has recently received considerable attention. The existing tongue body segmentation methods usually involve two key steps: edge detection and active contour model (ACM)-based segmentation. However, conventional edge detectors cannot faithfully detect the contour of the tongue body, and the initialization of ACM suffers from the edge discontinuity problem. To address these issues, we proposed a novel tongue body segmentation method, GaborFM, which initializes ACM by performing fast marching over the two-dimensional (2D) Gabor magnitude domain of the tongue images. For the enhancement of the contour of the tongue body, we used the 2D Gabor magnitude-based detector. To cope with the edge discontinuity problem, the fast marching method was utilized to connect the discontinuous contour segments, resulting in a closed and continuous tongue body contour for subsequent ACM-based segmentation. Qualitative and quantitative results showed that GaborFM is superior to the other methods for tongue body segmentation.

  17. Dilated contour extraction and component labeling algorithm for object vector representation

    Science.gov (United States)

    Skourikhine, Alexei N.

    2005-08-01

    Object boundary extraction from binary images is important for many applications, e.g., image vectorization, automatic interpretation of images containing segmentation results, printed and handwritten documents and drawings, maps, and AutoCAD drawings. Efficient and reliable contour extraction is also important for pattern recognition due to its impact on shape-based object characterization and recognition. The presented contour tracing and component labeling algorithm produces dilated (sub-pixel) contours associated with corresponding regions. The algorithm has the following features: (1) it always produces non-intersecting, non-degenerate contours, including the case of one-pixel wide objects; (2) it associates the outer and inner (i.e., around hole) contours with the corresponding regions during the process of contour tracing in a single pass over the image; (3) it maintains desired connectivity of object regions as specified by 8-neighbor or 4-neighbor connectivity of adjacent pixels; (4) it avoids degenerate regions in both background and foreground; (5) it allows an easy augmentation that will provide information about the containment relations among regions; (6) it has a time complexity that is dominantly linear in the number of contour points. This early component labeling (contour-region association) enables subsequent efficient object-based processing of the image information.

  18. Musically Tone-Deaf Individuals Have Difficulty Discriminating Intonation Contours Extracted from Speech

    Science.gov (United States)

    Patel, Aniruddh D.; Foxton, Jessica M.; Griffiths, Timothy D.

    2005-01-01

    Musically tone-deaf individuals have psychophysical deficits in detecting pitch changes, yet their discrimination of intonation contours in speech appears to be normal. One hypothesis for this dissociation is that intonation contours use coarse pitch contrasts which exceed the pitch-change detection thresholds of tone-deaf individuals (Peretz &…

  19. Application of Computer Modeling for Planning Plastic Surgeries

    OpenAIRE

    Jamrozik Klaudia; Rusek Jakub; Szozda Dominik; Karbowski Krzysztof

    2014-01-01

    The paper presents the application results of reverse engineering technology for planning the plastic surgery. First step is digitalization of the patient body. It is realized by 3D structured light scanner. The scanning data are transferred into 3dsMax software and used for planning plastic surgery. The planning effect is shown using stereoscopy visualization method.

  20. Coronal loop detection and salient contour group extraction from solar images

    Science.gov (United States)

    Durak, Nurcan

    2011-01-01

    This dissertation addresses two different problems: 1) coronal loop detection from solar images: and 2) salient contour group extraction from cluttered images. In the first part, we propose two different solutions to the coronal loop detection problem. The first solution is a block-based coronal loop mining method that detects coronal loops from solar images by dividing the solar image into fixed sized blocks, labeling the blocks as "Loop" or "Non-Loop", extracting features from the labeled blocks, and finally training classifiers to generate learning models that can classify new image blocks. The block-based approach achieves 64% accuracy in 10-fold cross validation experiments. To improve the accuracy and scalability, we propose a contour-based coronal loop detection method that extracts contours from cluttered regions, then labels the contours as "Loop" and "Non-Loop", and extracts geometric features from the labeled contours. The contour-based approach achieves 85% accuracy in 10-fold cross validation experiments, which is a 20% increase compared to the block-based approach. In the second part, we propose a method to extract semi-elliptical open curves from cluttered regions. Our method consists of the following steps: obtaining individual smooth contours along with their saliency measures; then starting from the most salient contour, searching for possible grouping options for each contour; and continuing the grouping until an optimum solution is reached. Our work involved the design and development of a complete system for coronal loop mining in solar images, which required the formulation of new Gestalt perceptual rules and a systematic methodology to select and combine them in a fully automated judicious manner using machine learning techniques that eliminate the need to manually set various weight and threshold values to define an effective cost function. After finding salient contour groups, we close the gaps within the contours in each group and perform

  1. Optical contouring of an acrylic surface for non-intrusive diagnostics in pipe-flow investigations

    Science.gov (United States)

    de Witt, Benjamin J.; Coronado-Diaz, Haydee; Hugo, Ronald J.

    2008-07-01

    In this work, an acrylic surface was optically contoured to correct for the optical distortion caused by a transparent pipe wall. This method can be applied to non-invasive viewing/imaging techniques for fluid flow experiments. Software tools were developed to aid in the design of an optically contoured acrylic test section for pipe-flow experiments. Numerical models were computed for a standard acrylic pipe, inner diameter 57.15 mm, with water enclosed. An optical contour prototype was machined on a 5-axis CNC machine, and polished with 1-15 μm diamond paste, alleviating any surface imperfections without significantly altering the contoured surface. Experiments were then performed to measure the emerging optical wavefront and was found to emerge planar when utilizing the optical contour. It was determined that the wavefront was corrected to within ten wavelengths of a Helium-Neon (He-Ne) laser beam.

  2. Parallel algorithm for real-time contouring from grid DEM on modern GPUs

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    A real-time algorithm for constructing contour maps from grid DEM data is pre-sented.It runs completely within the programmable 3D visualization pipeline.The interpolation is paralleled by rasterizer units in the graphics card,and contour line extraction is paralleled by pixel shader.During each frame of the rendering,we first make an elevation gradient map out of original terrain vertex data,then figure out the final contour lines with image-space processing,and directly blend the results on the original scene to obtain a final scene with contour map using alpha-blending.We implement this method in our global 3D-digitalearth system with Direct3D?9.0c API and tested on some consumer level PC platforms.For arbitrary scene with certain LOD level,the process takes less than 10 ms,giving topologically correct,anti-aliased contour lines.

  3. Talking with the Doctor about Breast Surgery Options

    Science.gov (United States)

    ... women express concerns regarding body image, sexuality, and attractiveness to their partner. This is very personal to ... tubes need to be placed? Will I need physical therapy after surgery? What is the likelihood of ...

  4. An evaluation of the contouring abilities of medical dosimetry students for the anatomy of a prostate cancer patient

    Energy Technology Data Exchange (ETDEWEB)

    Collins, Kevin S., E-mail: kscollin@siu.edu [School of Allied Health, College of Applied Sciences and Arts, Southern Illinois University Carbondale, Carbondale, IL (United States)

    2012-10-01

    Prostate cancer is one of the most common diseases treated in a radiation oncology department. One of the major predictors of the treatment outcome and patient side effects is the accuracy of the anatomical contours for the treatment plan. Therefore, the purpose of this study was to determine which anatomical structures are most often contoured correctly and incorrectly by medical dosimetry students. The author also wanted to discover whether a review of the contouring rules would increase contouring accuracy. To achieve this, a male computed tomography dataset consisting of 72 transverse slices was sent to students for contouring. The students were instructed to import this dataset into their treatment planning system and contour the following structures: skin, bladder, rectum, prostate, penile bulb, seminal vesicles, left femoral head, and right femoral head. Upon completion of the contours, the contour file was evaluated against a 'gold standard' contour set using StructSure software (Standard Imaging, Inc). A review of the initial contour results was conducted and then students were instructed to contour the dataset a second time. The results of this study showed significant differences between contouring sessions. These results and the standardization of contouring rules should benefit all individuals who participate in the treatment planning of cancer patients.

  5. Expert Consensus Contouring Guidelines for Intensity Modulated Radiation Therapy in Esophageal and Gastroesophageal Junction Cancer

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Abraham J., E-mail: wua@mskcc.org [Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Bosch, Walter R. [Washington University, St. Louis, Missouri (United States); Chang, Daniel T. [Stanford Cancer Institute, Stanford, California (United States); Hong, Theodore S. [Massachusetts General Hospital, Boston, Massachusetts (United States); Jabbour, Salma K. [Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey (United States); Kleinberg, Lawrence R. [Johns Hopkins Medical Center, Baltimore, Maryland (United States); Mamon, Harvey J. [Brigham and Women' s Hospital, Boston, Massachusetts (United States); Thomas, Charles R. [Knight Cancer Institute, Oregon Health & Sciences University, Portland, Oregon (United States); Goodman, Karyn A. [Memorial Sloan-Kettering Cancer Center, New York, New York (United States)

    2015-07-15

    Purpose/Objective(s): Current guidelines for esophageal cancer contouring are derived from traditional 2-dimensional fields based on bony landmarks, and they do not provide sufficient anatomic detail to ensure consistent contouring for more conformal radiation therapy techniques such as intensity modulated radiation therapy (IMRT). Therefore, we convened an expert panel with the specific aim to derive contouring guidelines and generate an atlas for the clinical target volume (CTV) in esophageal or gastroesophageal junction (GEJ) cancer. Methods and Materials: Eight expert academically based gastrointestinal radiation oncologists participated. Three sample cases were chosen: a GEJ cancer, a distal esophageal cancer, and a mid-upper esophageal cancer. Uniform computed tomographic (CT) simulation datasets and accompanying diagnostic positron emission tomographic/CT images were distributed to each expert, and the expert was instructed to generate gross tumor volume (GTV) and CTV contours for each case. All contours were aggregated and subjected to quantitative analysis to assess the degree of concordance between experts and to generate draft consensus contours. The panel then refined these contours to generate the contouring atlas. Results: The κ statistics indicated substantial agreement between panelists for each of the 3 test cases. A consensus CTV atlas was generated for the 3 test cases, each representing common anatomic presentations of esophageal cancer. The panel agreed on guidelines and principles to facilitate the generalizability of the atlas to individual cases. Conclusions: This expert panel successfully reached agreement on contouring guidelines for esophageal and GEJ IMRT and generated a reference CTV atlas. This atlas will serve as a reference for IMRT contours for clinical practice and prospective trial design. Subsequent patterns of failure analyses of clinical datasets using these guidelines may require modification in the future.

  6. Expert consensus contouring guidelines for IMRT in esophageal and gastroesophageal junction cancer

    Science.gov (United States)

    Wu, Abraham J.; Bosch, Walter R.; Chang, Daniel T.; Hong, Theodore S.; Jabbour, Salma K.; Kleinberg, Lawrence R.; Mamon, Harvey J.; Thomas, Charles R.; Goodman, Karyn A.

    2015-01-01

    Purpose/Objective(s) Current guidelines for esophageal cancer contouring are derived from traditional two-dimensional fields based on bony landmarks, and do not provide sufficient anatomical detail to ensure consistent contouring for more conformal radiotherapy techniques such as intensity-modulated radiation therapy (IMRT). Therefore, we convened an expert panel with the specific aim to derive contouring guidelines and generate an atlas for the clinical target volume (CTV) in esophageal or gastroesophageal junction (GEJ) cancer. Methods and Materials Eight expert academically-based gastrointestinal radiation oncologists participated. Three sample cases were chosen: a GEJ cancer, a distal esophageal cancer, and a mid-upper esophageal cancer. Uniform CT simulation datasets and an accompanying diagnostic PET-CT were distributed to each expert, and he/she was instructed to generate gross tumor volume (GTV) and CTV contours for each case. All contours were aggregated and subjected to quantitative analysis to assess the degree of concordance between experts and generate draft consensus contours. The panel then refined these contours to generate the contouring atlas. Results Kappa statistics indicated substantial agreement between panelists for each of the three test cases. A consensus CTV atlas was generated for the three test cases, each representing common anatomic presentations of esophageal cancer. The panel agreed on guidelines and principles to facilitate the generalizability of the atlas to individual cases. Conclusions This expert panel successfully reached agreement on contouring guidelines for esophageal and GEJ IMRT and generated a reference CTV atlas. This atlas will serve as a reference for IMRT contours for clinical practice and prospective trial design. Subsequent patterns of failure analyses of clinical datasets utilizing these guidelines may require modification in the future. PMID:26104943

  7. Assessment and improvement of radiation oncology trainee contouring ability utilizing consensus-based penalty metrics

    International Nuclear Information System (INIS)

    The objective of this study was to develop and assess the feasibility of utilizing consensus-based penalty metrics for the purpose of critical structure and organ at risk (OAR) contouring quality assurance and improvement. A Delphi study was conducted to obtain consensus on contouring penalty metrics to assess trainee-generated OAR contours. Voxel-based penalty metric equations were used to score regions of discordance between trainee and expert contour sets. The utility of these penalty metric scores for objective feedback on contouring quality was assessed by using cases prepared for weekly radiation oncology radiation oncology trainee treatment planning rounds. In two Delphi rounds, six radiation oncology specialists reached agreement on clinical importance/impact and organ radiosensitivity as the two primary criteria for the creation of the Critical Structure Inter-comparison of Segmentation (CriSIS) penalty functions. Linear/quadratic penalty scoring functions (for over- and under-contouring) with one of four levels of severity (none, low, moderate and high) were assigned for each of 20 OARs in order to generate a CriSIS score when new OAR contours are compared with reference/expert standards. Six cases (central nervous system, head and neck, gastrointestinal, genitourinary, gynaecological and thoracic) then were used to validate 18 OAR metrics through comparison of trainee and expert contour sets using the consensus derived CriSIS functions. For 14 OARs, there was an improvement in CriSIS score post-educational intervention. The use of consensus-based contouring penalty metrics to provide quantitative information for contouring improvement is feasible.

  8. Fast finite elements for surgery simulation

    DEFF Research Database (Denmark)

    Bro-Nielsen, Morten

    1997-01-01

    This paper discusses volumetric deformable models for modeling human body parts and organs in surgery simulation systems. These models are built using finite element models for linear elastic materials. To achieve real-time response condensation has been applied to the system stiffness matrix......, and selective matrix vector multiplication has been used to minimize the computational cost...

  9. Contours, 2' contours do not cover the entire county, although most of the Green Bay Metro area and villages are complete, Published in 2000, 1:2400 (1in=200ft) scale, Brown County, WI.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:2400 (1in=200ft) scale, was produced all or in part from Orthoimagery information as of 2000. It is described as '2' contours...

  10. Contours, 2 foot contours from LiDAR flown under the LAR-IAC project, Published in 2006, 1:600 (1in=50ft) scale, County of Los Angeles.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:600 (1in=50ft) scale, was produced all or in part from LIDAR information as of 2006. It is described as '2 foot contours from...

  11. Contours, Contours generated at 2' intervals as part of the GIS database maintained by the Peach County Tax Assessors' Office., Published in 2006, 1:1200 (1in=100ft) scale, Peach County.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from Orthoimagery information as of 2006. It is described as 'Contours...

  12. Contours, Elevation contour data are a fundamental base map layer for large scale mapping and GIS analysis., Published in 2001, 1:24000 (1in=2000ft) scale, Louisiana State University.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:24000 (1in=2000ft) scale as of 2001. It is described as 'Elevation contour data are a fundamental base map layer for large...

  13. Renal cortical volume measured using automatic contouring software for computed tomography and its relationship with BMI, age and renal function

    International Nuclear Information System (INIS)

    Purpose: To evaluate the relationship between renal cortical volume, measured by an automatic contouring software, with body mass index (BMI), age and renal function. Materials and methods: The study was performed in accordance to the institutional guidelines at our hospital. Sixty-four patients (34 men, 30 women), aged 19 to 79 years had their CT scans for diagnosis or follow-up of hepatocellular carcinoma retrospectively examined by a computer workstation using a software that automatically contours the renal cortex and the renal parenchyma. Body mass index and estimated glomerular filtration rate (eGFR) were calculated based on data collected. Statistical analysis was done using the Student t-test, multiple regression analysis, and intraclass correlation coefficient (ICC). Results: The ICC for total renal and renal cortical volumes were 0.98 and 0.99, respectively. Renal volume measurements yielded a mean cortical volume of 105.8 cm3 ± 28.4 SD, mean total volume of 153 cm3 ± 39 SD and mean medullary volume of 47.8 cm3 ± 19.5 SD. The correlation between body weight/height/BMI and both total renal and cortical volumes presented r = 0.6, 0.6 and 0.4, respectively, p < 0.05, while the correlation between renal cortex and age was r = -0.3, p < 0.05. eGFR showed correlation with renal cortical volume r = 0.6, p < 0.05. Conclusion: This study demonstrated that renal cortical volume had a moderate positive relationship with BMI, moderate negative relationship with age, and a strong positive relationship with the renal function, and provided a new method to routinely produce volumetric assessment of the kidney.

  14. Renal cortical volume measured using automatic contouring software for computed tomography and its relationship with BMI, age and renal function

    Energy Technology Data Exchange (ETDEWEB)

    Muto, Natalia Sayuri, E-mail: nataliamuto@gmail.com [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan); Kamishima, Tamotsu, E-mail: ktamotamo2@yahoo.co.jp [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan); Harris, Ardene A., E-mail: ardene_b@yahoo.com [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan); Kato, Fumi, E-mail: fumikato@med.hokudai.ac.jp [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan); Onodera, Yuya, E-mail: yuyaonodera@med.hokudai.ac.jp [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan); Terae, Satoshi, E-mail: saterae@yahoo.co.jp [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan); Shirato, Hiroki, E-mail: shirato@med.hokudai.ac.jp [Department of Radiology, Hokkaido University Hospital, N15 W7, kita-ku, Sapporo City, 0608638 (Japan)

    2011-04-15

    Purpose: To evaluate the relationship between renal cortical volume, measured by an automatic contouring software, with body mass index (BMI), age and renal function. Materials and methods: The study was performed in accordance to the institutional guidelines at our hospital. Sixty-four patients (34 men, 30 women), aged 19 to 79 years had their CT scans for diagnosis or follow-up of hepatocellular carcinoma retrospectively examined by a computer workstation using a software that automatically contours the renal cortex and the renal parenchyma. Body mass index and estimated glomerular filtration rate (eGFR) were calculated based on data collected. Statistical analysis was done using the Student t-test, multiple regression analysis, and intraclass correlation coefficient (ICC). Results: The ICC for total renal and renal cortical volumes were 0.98 and 0.99, respectively. Renal volume measurements yielded a mean cortical volume of 105.8 cm{sup 3} {+-} 28.4 SD, mean total volume of 153 cm{sup 3} {+-} 39 SD and mean medullary volume of 47.8 cm{sup 3} {+-} 19.5 SD. The correlation between body weight/height/BMI and both total renal and cortical volumes presented r = 0.6, 0.6 and 0.4, respectively, p < 0.05, while the correlation between renal cortex and age was r = -0.3, p < 0.05. eGFR showed correlation with renal cortical volume r = 0.6, p < 0.05. Conclusion: This study demonstrated that renal cortical volume had a moderate positive relationship with BMI, moderate negative relationship with age, and a strong positive relationship with the renal function, and provided a new method to routinely produce volumetric assessment of the kidney.

  15. Pacemakers charging using body energy.

    Science.gov (United States)

    Bhatia, Dinesh; Bairagi, Sweeti; Goel, Sanat; Jangra, Manoj

    2010-01-01

    Life-saving medical implants like pacemakers and defibrillators face a big drawback that their batteries eventually run out and patients require frequent surgery to have these batteries replaced. With the advent of technology, alternatives can be provided for such surgeries. To power these devices, body energy harvesting techniques may be employed. Some of the power sources are patient's heartbeat, blood flow inside the vessels, movement of the body parts, and the body temperature (heat). Different types of sensors are employed, such as for sensing the energy from the heartbeat the piezoelectric and semiconducting coupled nanowires are used that convert the mechanical energy into electricity. Similarly, for sensing the blood flow energy, nanogenerators driven by ultrasonic waves are used that have the ability to directly convert the hydraulic energy in human body to electrical energy. Another consideration is to use body heat employing biothermal battery to generate electricity using multiple arrays of thermoelectric generators built into an implantable chip. These generators exploit the well-known thermocouple effect. For the biothermal device to work, it needs a 2°C temperature difference across it. But there are many parts of the body where a temperature difference of 5°C exists - typically in the few millimeters just below the skin, where it is planned to place this device. This study focuses on using body heat as an alternative energy source to recharge pacemaker batteries and other medical devices and prevent the possibility of life-risk during repeated surgery.

  16. Pacemakers charging using body energy

    Directory of Open Access Journals (Sweden)

    Dinesh Bhatia

    2010-01-01

    Full Text Available Life-saving medical implants like pacemakers and defibrillators face a big drawback that their batteries eventually run out and patients require frequent surgery to have these batteries replaced. With the advent of technology, alternatives can be provided for such surgeries. To power these devices, body energy harvesting techniques may be employed. Some of the power sources are patient′s heartbeat, blood flow inside the vessels, movement of the body parts, and the body temperature (heat. Different types of sensors are employed, such as for sensing the energy from the heartbeat the piezoelectric and semiconducting coupled nanowires are used that convert the mechanical energy into electricity. Similarly, for sensing the blood flow energy, nanogenerators driven by ultrasonic waves are used that have the ability to directly convert the hydraulic energy in human body to electrical energy. Another consideration is to use body heat employing biothermal battery to generate electricity using multiple arrays of thermoelectric generators built into an implantable chip. These generators exploit the well-known thermocouple effect. For the biothermal device to work, it needs a 2°C temperature difference across it. But there are many parts of the body where a temperature difference of 5°C exists - typically in the few millimeters just below the skin, where it is planned to place this device. This study focuses on using body heat as an alternative energy source to recharge pacemaker batteries and other medical devices and prevent the possibility of life-risk during repeated surgery.

  17. A Biomimetic steering robot for Minimally invasive surgery application

    OpenAIRE

    Chen, G.; M. T. Pham; Maalej, T.; Fourati, H.; Moreau, R.; Sesmat, S.

    2010-01-01

    Minimally Invasive Surgery represents the future of many types of medical inter- ventions such as keyhole neurosurgey or transluminal endoscopic surgery. These procedures involve insertion of surgical instruments such as needles and endoscopes into human body through small incision/ body cavity for biopsy and drug delivery. However, nearly all surgical instruments for these procedures are inserted manually and there is a long learning curve for surgeons to use them properly. Many research eff...

  18. THE SOCIAL CONSTRUCTION OF “PATIENTS” IN COSMETIC SURGERY

    OpenAIRE

    GEORGIA DILAKI; GEORGE ALEXIAS; CHARALAMBOS TSEKERIS

    2012-01-01

    This paper seeks to study the way in which the human body is socially constructed, with emphasis on the case of aesthetic surgery. Drawing from semi-structured qualitative interviews with plastic surgeons and individuals who modified their body through aesthetic surgery, it is illustrated a contrast between the medical discourse and the patient’s discourse, in terms of the motives for conducting these surgical procedures. For plastic surgeons, on the one hand, the reasons prompting individual...

  19. SU-E-J-108: Solving the Chinese Postman Problem for Effective Contour Deformation

    International Nuclear Information System (INIS)

    Purpose: To develop a practical approach for accurate contour deformation when deformable image registration (DIR) is used for atlas-based segmentation or contour propagation in image-guided radiotherapy. Methods: A contour deformation approach was developed on the basis of 3D mesh operations. The 2D contours represented by a series of points in each slice were first converted to a 3D triangular mesh, which was deformed by the deformation vectors resulting from DIR. A set of parallel 2D planes then cut through the deformed 3D mesh, generating unordered points and line segments, which should be reorganized into a set of 2D contour points. It was realized that the reorganization problem was equivalent to solving the Chinese Postman Problem (CPP) by traversing a graph built from the unordered points with the least cost. Alternatively, deformation could be applied to a binary mask converted from the original contours. The deformed binary mask was then converted back into contours at the CT slice locations. We performed a qualitative comparison to validate the mesh-based approach against the image-based approach. Results: The DIR could considerably change the 3D mesh, making complicated 2D contour representations after deformation. CPP was able to effectively reorganize the points in 2D planes no matter how complicated the 2D contours were. The mesh-based approach did not require a post-processing of the contour, thus accurately showing the actual deformation in DIR. The mesh-based approach could keep some fine details and resulted in smoother contours than the image-based approach did, especially for the lung structure. Image-based approach appeared to over-process contours and suffered from image resolution limits. The mesh-based approach was integrated into in-house DIR software for use in routine clinic and research. Conclusion: We developed a practical approach for accurate contour deformation. The efficiency of this approach was demonstrated in both clinic and

  20. SU-E-J-108: Solving the Chinese Postman Problem for Effective Contour Deformation

    Energy Technology Data Exchange (ETDEWEB)

    Yang, J; Zhang, L; Balter, P; Court, L [MD Anderson Cancer Center, Houston, TX (United States); Zhang, Y; Dong, L [Scripps Proton Therapy Center, San Diego, CA (United States)

    2015-06-15

    Purpose: To develop a practical approach for accurate contour deformation when deformable image registration (DIR) is used for atlas-based segmentation or contour propagation in image-guided radiotherapy. Methods: A contour deformation approach was developed on the basis of 3D mesh operations. The 2D contours represented by a series of points in each slice were first converted to a 3D triangular mesh, which was deformed by the deformation vectors resulting from DIR. A set of parallel 2D planes then cut through the deformed 3D mesh, generating unordered points and line segments, which should be reorganized into a set of 2D contour points. It was realized that the reorganization problem was equivalent to solving the Chinese Postman Problem (CPP) by traversing a graph built from the unordered points with the least cost. Alternatively, deformation could be applied to a binary mask converted from the original contours. The deformed binary mask was then converted back into contours at the CT slice locations. We performed a qualitative comparison to validate the mesh-based approach against the image-based approach. Results: The DIR could considerably change the 3D mesh, making complicated 2D contour representations after deformation. CPP was able to effectively reorganize the points in 2D planes no matter how complicated the 2D contours were. The mesh-based approach did not require a post-processing of the contour, thus accurately showing the actual deformation in DIR. The mesh-based approach could keep some fine details and resulted in smoother contours than the image-based approach did, especially for the lung structure. Image-based approach appeared to over-process contours and suffered from image resolution limits. The mesh-based approach was integrated into in-house DIR software for use in routine clinic and research. Conclusion: We developed a practical approach for accurate contour deformation. The efficiency of this approach was demonstrated in both clinic and

  1. 3D Filament Network Segmentation with Multiple Active Contours

    Science.gov (United States)

    Xu, Ting; Vavylonis, Dimitrios; Huang, Xiaolei

    2014-03-01

    Fluorescence microscopy is frequently used to study two and three dimensional network structures formed by cytoskeletal polymer fibers such as actin filaments and microtubules. While these cytoskeletal structures are often dilute enough to allow imaging of individual filaments or bundles of them, quantitative analysis of these images is challenging. To facilitate quantitative, reproducible and objective analysis of the image data, we developed a semi-automated method to extract actin networks and retrieve their topology in 3D. Our method uses multiple Stretching Open Active Contours (SOACs) that are automatically initialized at image intensity ridges and then evolve along the centerlines of filaments in the network. SOACs can merge, stop at junctions, and reconfigure with others to allow smooth crossing at junctions of filaments. The proposed approach is generally applicable to images of curvilinear networks with low SNR. We demonstrate its potential by extracting the centerlines of synthetic meshwork images, actin networks in 2D TIRF Microscopy images, and 3D actin cable meshworks of live fission yeast cells imaged by spinning disk confocal microscopy.

  2. Cell survival and iso-effect contours in irradiated tissues

    International Nuclear Information System (INIS)

    Cell population kinetic parameters derived from radiobiological experiments and analysis of clinical data can be used to compute cellular surviving fractions in irradiated tumours and normal tissues. A three-component model of cellular radiation lethality, capable of simulating irreparable lethal events, reversible or sublethal effects and tissue repopulation processes, has proved adequate for clinical purposes. On this basis, computer programs have been developed for generating iso-effect (iso-survival) functions for various fractionation intervals in several tissues and tumours; for determining surviving fractions, equivalent single doses, and probabilities of response with specified fractionation schemes; and for optimizing treatment by identifying the procedure giving the highest probability of uncomplicated cure for a given tumour type growing in a specified location. If the relevant parameters for each of the tissues traversed by the beam, the physical dose absorbed at each point of interest, and the size, number and sequence of fractional doses reaching that point are known, then a series of computations of cellular surviving fractions can be made and used to draw iso-effect contours as a supplement to the physical isodose distribution in the same region. Procedures for both physical and biological optimization of the whole treatment plan are suggested. (author)

  3. Patterns in biofilms: From contour undulations to fold focussing

    Science.gov (United States)

    Ben Amar, Martine; Wu, Min

    2014-11-01

    Morphologies of soft materials in growth, swelling or drying have been extensively studied recently. Shape modifications occur as the size varies transforming ordinary spheres, cylinders and thin plates into more or less complex objects. Here we consider the genesis of biofilm patterns when a simple disc containing initially bacteria with moderate adhesion to a rigid substrate grows according to very simple rules. The initial circular geometry is lost during the growth expansion, contour undulations and buckling appear, ultimately a rather regular periodic focussing of folds repartition emerges. We theoretically predict these morphological instabilities as bifurcations of solutions in elasticity, characterized by typical driving parameters established here. The substrate plays a critical role limiting the geometry of the possible modes of instabilities and anisotropic growth, adhesion and toughness compete to eventually give rise to wrinkling, buckling or both. Additionally, due to the substrate, we show that the ordinary buckling modes, vertical deviation of thin films, are not observed in practice and a competitive pattern with self-focussing of folds can be found analytically. These patterns are reminiscent of the blisters of delamination in material sciences and explain recent observations of bacteria biofilms. The model presented here is purely analytical, is based on a neo-Hookean elastic energy, and can be extended without difficulties and applied to polymer materials.

  4. Changes of contour of the spine caused by load carrying.

    Science.gov (United States)

    Vacheron, J J; Poumarat, G; Chandezon, R; Vanneuville, G

    1999-01-01

    The development of new leisure activities such as walking has spread the use of the backpack as a means of carrying loads. The aim of this work was to present a way of defining the movements imposed on the trunk by this type of load carrying. A 20 kg load situated at the thoracic level (T9) of the trunk, was placed in a backpack (2.5 kg). The 12 subjects were average mountain guides of Auvergne region, intermediate level and complete beginners. External markers were glued to the projecting contours of the spinous processes of the C7, T7, T12, L3 and S1 vertebrae, the shin and the external occipital tuberosity (EOT). Using a Vicon 140 3-D system we measured the effective mobility of the different spinal segments in the sagittal plane during one step. For every subject, we noticed a significant decrease of the effective inter-segmental mobility (EISM) between S1-L3-T12 (p next level between L3-T12-T7 (p < .05). An increase of the EISM between T7-C7-EOT was noted (p < .05). We supposed that strength loss of the back muscles and/or angular oscillations of the trunk could be a common cause of symptoms during backpacking. The subjects using this type of load carrying have to adopt an adequate position of the lumbar, dorsal and cervical vertebrae. PMID:10399210

  5. [Assessment of bariatric surgery results].

    Science.gov (United States)

    Barros, Lívia Moreira; Frota, Natasha Marques; Moreira, Rosa Aparecida Nogueira; de Araújo, Thiago Moura; Caetano, Joselany Áfio

    2015-03-01

    The objective was to evaluate the results of bariatric surgery in patients in the late postoperative period using the Bariatric Analysis and Reporting Outcome System (BAROS). This cross-sectional study was conducted from November 2011 to June 2012 at a hospital in the state of Ceará, Brazil. Data were collected from 92 patients using the BAROS protocol, which analyzes weight loss, improved comorbidities, complications, reoperations and Quality of Life (QoL). Data were analysed using the chi-squared test, Fischer's exact test and the Mann-Whitney test. There was a reduction in the Body Mass Index (47.2±6.8 kg/m2 in the pre-operatory and 31.3±5.0 kg/m2 after surgery, p<0.001). The comorbidity with the highest resolution was arterial hypertension (p<0.001), and QV improved in 94.6% of patients. The main complications were hair loss, incisional hernia and cholelithiasis. The surgery provided satisfactory weight loss and improvements in the comorbidities associated to a better QL. Use of the BAROS protocol allows nurses to plan interventions and maintain the good results. PMID:26098798

  6. Aspectos psicossociais em cirurgia bariátrica: a associação entre variáveis emocionais, trabalho, relacionamentos e peso corporal Psychosocial aspects in bariatric surgery: the association among emotional variables, job, relationships and body weight

    Directory of Open Access Journals (Sweden)

    Graziela A Nogueira de Almeida

    2011-09-01

    Full Text Available RACIONAL: Operações bariátricas têm sido consideradas alternativa para o tratamento de obesidade mórbida. Alguns eventos adversos que as pessoas experimentam após o tratamento frequentemente são consequência da falta de conhecimento consistente associada a fatores psicossociais que estão relacionadas ao status pré-operatório dos pacientes. OBJETIVO: Avaliar as variáveis ?psicossociais de 414 candidatos ? cirurgia bari?trica do Hospital de Cl?nicas da Faculdade de Medicina da Universidade de S?o Paulo, Ribeir?o Preto, SP, Brasil. psicossociais de 414 candidatos à cirurgia bariátrica do Hospital de Clínicas da Faculdade de Medicina da Universidade de São Paulo, Ribeirão Preto, SP, Brasil. MÉTODOS: Foram utilizados entrevista semi-estruturada, Inventário de Depressão de Beck (BDI, Inventário de Ansiedade de Beck (BAI e Binge Eating Scale (BES. RESULTADOS: IMC foi maior entre os pacientes que não tinham emprego (p = 0,019, do sexo feminino, os que tinham um parceiro e os pacientes com IMC 50 kg / m² (p 50 kg / m² foram mais propensos a apresentar sintomas de ansiedade.BACKGROUND: Bariatric surgeries have been considered an alternative for treatment of morbid obesity. Some adverse events that people experience after the treatment frequently are the consequence of the lack of consistent knowledge associated with psychosocial factors that are related to the pre-surgery status of the patients. AIM: To evaluate psychosocial variables of 414 candidates for bariatric surgery from Clinical Hospital of Medical School at University of São Paulo, Ribeirão Preto, SP, Brazil. METHODS: Semi-structured interview, Beck Depression Inventory (BDI, Beck Anxiety Inventory (BAI and Binge Eating Scale (BES were used. RESULTS: BMI was higher among patients who had no employment (p = 0.019. Female, patients who had a partner and patients with a BMI 50 kg/m² (p 50 kg / m² were more likely to experience anxiety symptoms.

  7. Photoacoustic monitoring of clot formation during surgery and tumor surgery

    Science.gov (United States)

    Juratli, Mazen A.; Galanzha, Ekaterina I.; Sarimollaoglu, Mustafa; Nedosekin, Dmitry A.; Suen, James Y.; Zharov, Vladimir P.

    2013-03-01

    When a blood vessel is injured, the normal physiological response of the body is to form a clot (thrombus) to prevent blood loss. Alternatively, even without injury to the blood vessel, the pathological condition called thromboembolism may lead to the formation of circulating blood clots (CBCs), also called emboli, which can clog blood vessels throughout the body. Veins of the extremities (venous thromboembolism), lungs (pulmonary embolism ), brain (embolic stroke), heart (myocardial infarction), kidneys, and gastrointestinal tract are often affected. Emboli are also common complications of infection, inflammation, cancer, surgery, radiation and coronary artery bypass grafts. Despite the clear medical significance of CBCs, however, little progress has been made in the development of methods for real-time detection and identification of CBCs. To overcome these limitations, we developed a new modification of in vivo photoacoustic (PA) flow cytometry (PAFC) for real-time detection of white, red, and mixed clots through a transient decrease, increase or fluctuation of PA signal amplitude, respectively. In this work, using PAFC and mouse models, we present for the first time direct evidence that some medical procedures, such as conventional or cancer surgery may initiate the formation of CBCs. In conclusion, the PA diagnostic platform can be used in real-time to define risk factors for cardiovascular diseases, assist in the prognosis and potential prevention of stroke by using a well-timed therapy or as a clot count as a marker of therapy efficacy.

  8. Equal latency contours for bottlenose dolphins (Tursiops truncatus) and California sea lions (Zalophus californianus).

    Science.gov (United States)

    Mulsow, Jason; Schlundt, Carolyn E; Brandt, Lacey; Finneran, James J

    2015-11-01

    Loudness perception by non-human animals is difficult to study directly. Previous research efforts have instead focused on estimating loudness perception using simple reaction time (RT) data. These data are used to generate equal latency contours that serve as a proxy for equal loudness contours. To aid the design of auditory weighting functions for marine mammals, equal latency contours were generated using RT data for two marine mammal species that are representative of broader functional hearing groups: the bottlenose dolphin (under water) and California sea lion (in air). In all cases, median RT decreased with increasing tone sound pressure level (SPL). The equal latency contours corresponding to near-threshold SPLs were similar to audiograms for both species. The sea lion contours showed some compression at frequencies below 1 kHz; however, a similar pattern was not apparent in the more variable data for dolphins. Equal latency contours for SPLs greater than approximately 40 dB above threshold diverged from predicted equal loudness contours, likely due to the asymptotic nature of RT at the highest tested SPLs. The results suggest that auditory threshold data, potentially augmented with compression at low frequencies, may provide a useful way forward when designing auditory weighting functions for marine mammals.

  9. Brain MR image segmentation using local and global intensity fitting active contours/surfaces.

    Science.gov (United States)

    Wang, Li; Li, Chunming; Sun, Quansen; Xia, Deshen; Kao, Chiu-Yen

    2008-01-01

    In this paper, we present an improved region-based active contour/surface model for 2D/3D brain MR image segmentation. Our model combines the advantages of both local and global intensity information, which enable the model to cope with intensity inhomogeneity. We define an energy functional with a local intensity fitting term and an auxiliary global intensity fitting term. In the associated curve evolution, the motion of the contour is driven by a local intensity fitting force and a global intensity fitting force, induced by the local and global terms in the proposed energy functional, respectively. The influence of these two forces on the curve evolution is complementary. When the contour is close to object boundaries, the local intensity fitting force became dominant, which attracts the contour toward object boundaries and finally stops the contour there. The global intensity fitting force is dominant when the contour is far away from object boundaries, and it allows more flexible initialization of contours by using global image information. The proposed model has been applied to both 2D and 3D brain MR image segmentation with promising results.

  10. Contours, 2 foot contours automatically generated from 2008 LIDAR for the purpose of supporting FEMA floodplain mapping. Limited manual editing, breaklines for waterbodies greater than 5 acres created and use.10' index contours labeled., Published in 2008, 1:1200 (1in=100ft) scale, CITY OF PORTAGE.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Contours dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from LIDAR information as of 2008. It is described as '2 foot contours...

  11. Can saline be an alternative to aesthetic surgery in extended breast quadrantectomy

    International Nuclear Information System (INIS)

    Objective was to explore other simpler options sparing the patients the morbidity and cost in extended breast quadrantectomy. This prospective was undertaken at King Fahd Hospital of the University, Al-Khobar Eastern Province of Saudi Arabia between 1999-2005. Factors considered for patients undergoing breast-conserving surgery were based on age, tumor size, pathological characteristics, and patient's preference. Frozen section was adopted in all procedures to insure negative margins. After extended quadrantectomy, 200-400 cc was injected into the cavity to retain breast contour. Magnetic resonance imaging was used for postoperative assessment. Twenty-four patients were included, aged 28-43 years and tumor size 3-5 cms. All margins were negative on frozen section. The contour of the breast was restored with saline, MRI was employed for follow up at the immediate post operative period and at 4-6 months, it demonstrated restored breast contour and the saline filled cavity replaced by lipo-fibrous tissue. Follow up after 4-24 months showed that all patients noticed some degree of asymmetry, yet were satisfied with the result, none required or requested additional surgery. In large issue excision injecting saline into cavities temporarily prevents the caving in of the redundant skin, which has the tendency to permanently adhere to the fascia thereby preventing gross deformities. It has proven effective, contour storing and scored high satisfaction among patients. It certainly does not replace cosmetic breast surgery, however, it should be considered in centers were once-plastic surgery is not readily available. (author)

  12. Body image dissatisfaction and its relationship with physical activity and body mass index in Brazilian adolescents

    Directory of Open Access Journals (Sweden)

    Maria F. Laus

    2011-01-01

    Full Text Available Objective: To evaluate body image dissatisfaction and its relationship with physical activity and body mass index in a Brazilian sample of adolescents. Methods: A total of 275 adolescents (139 boys and 136 girls between the ages of 14 and 18 years completed measures of body image dissatisfaction through the Contour Drawing Scale and current physical activity by the International Physical Activity Questionnaire. Weight and height were also measured for subsequent calculation of body mass index. Results: Boys and girls differed significantly regarding body image dissatisfaction, with girls reporting higher levels of dissatisfaction. Underweight and eutrophic boys preferred to be heavier, while those overweight preferred be thinner and, in contrast, girls desired to be thinner even when they are of normal weight. Conclusion: Body image dissatisfaction was strictly related to body mass index, but not to physical activity.

  13. Objectification theory predicts college women’s attitudes toward cosmetic surgery

    OpenAIRE

    Calogero, Rachel M.; Pina, Afroditi; Park, Lora E.; Rahemtulla, Zara K.

    2010-01-01

    This study investigated cosmetic surgery attitudes within the framework of objectification theory. One hundred predominantlyWhite, British undergraduate women completed self-report measures of impression management, global selfesteem, interpersonal sexual objectification, self-surveillance, body shame, and three components of cosmetic surgery attitudes. As expected, each of the objectification theory variables predicted greater consideration of having cosmetic surgery ...

  14. Pelvic Normal Tissue Contouring Guidelines for Radiation Therapy: A Radiation Therapy Oncology Group Consensus Panel Atlas

    Energy Technology Data Exchange (ETDEWEB)

    Gay, Hiram A., E-mail: hgay@radonc.wustl.edu [Washington University School of Medicine, St Louis, MO (United States); Barthold, H. Joseph [Commonwealth Hematology and Oncology, Weymouth, MA (United States); Beth Israel Deaconess Medical Center, Boston, MA (Israel); O' Meara, Elizabeth [Radiation Therapy Oncology Group, Philadelphia, PA (United States); Bosch, Walter R. [Washington University School of Medicine, St Louis, MO (United States); El Naqa, Issam [Department of Radiation Oncology, McGill University Health Center, Montreal, Quebec (Canada); Al-Lozi, Rawan [Washington University School of Medicine, St Louis, MO (United States); Rosenthal, Seth A. [Radiation Oncology Centers, Radiological Associates of Sacramento, Sacramento, CA (United States); Lawton, Colleen [Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI (United States); Lee, W. Robert [Department of Radiation Oncology, Duke University Medical Center, Durham, NC (United States); Sandler, Howard [Cedars-Sinai Medical Center, Los Angeles, CA (United States); Zietman, Anthony [Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA (United States); Myerson, Robert [Washington University School of Medicine, St Louis, MO (United States); Dawson, Laura A. [Department of Radiation Oncology, Princess Margaret Hospital, University of Toronto, Toronto, Ontario (Canada); Willett, Christopher [Department of Radiation Oncology, Duke University Medical Center, Durham, NC (United States); Kachnic, Lisa A. [Department of Radiation Oncology, Boston Medical Center, Boston University School of Medicine, Boston, MA (United States); Jhingran, Anuja [Department of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX (United States); Portelance, Lorraine [University of Miami, Miami, FL (United States); Ryu, Janice [Radiation Oncology Centers, Radiological Associates of Sacramento, Sacramento, CA (United States); and others

    2012-07-01

    Purpose: To define a male and female pelvic normal tissue contouring atlas for Radiation Therapy Oncology Group (RTOG) trials. Methods and Materials: One male pelvis computed tomography (CT) data set and one female pelvis CT data set were shared via the Image-Guided Therapy QA Center. A total of 16 radiation oncologists participated. The following organs at risk were contoured in both CT sets: anus, anorectum, rectum (gastrointestinal and genitourinary definitions), bowel NOS (not otherwise specified), small bowel, large bowel, and proximal femurs. The following were contoured in the male set only: bladder, prostate, seminal vesicles, and penile bulb. The following were contoured in the female set only: uterus, cervix, and ovaries. A computer program used the binomial distribution to generate 95% group consensus contours. These contours and definitions were then reviewed by the group and modified. Results: The panel achieved consensus definitions for pelvic normal tissue contouring in RTOG trials with these standardized names: Rectum, AnoRectum, SmallBowel, Colon, BowelBag, Bladder, UteroCervix, Adnexa{sub R}, Adnexa{sub L}, Prostate, SeminalVesc, PenileBulb, Femur{sub R}, and Femur{sub L}. Two additional normal structures whose purpose is to serve as targets in anal and rectal cancer were defined: AnoRectumSig and Mesorectum. Detailed target volume contouring guidelines and images are discussed. Conclusions: Consensus guidelines for pelvic normal tissue contouring were reached and are available as a CT image atlas on the RTOG Web site. This will allow uniformity in defining normal tissues for clinical trials delivering pelvic radiation and will facilitate future normal tissue complication research.

  15. Variations in the Contouring of Organs at Risk: Test Case From a Patient With Oropharyngeal Cancer

    Energy Technology Data Exchange (ETDEWEB)

    Nelms, Benjamin E., E-mail: alpha@canislupusllc.com [Canis Lupus LLC, Merrimac, WI (United States); Tome, Wolfgang A. [Department of Human Oncology, University of Wisconsin, Madison, WI (United States); Robinson, Greg [Radiation Oncology Resources, Goshen, IN (United States); Wheeler, James [Department of Radiation Oncology, Goshen Health System Goshen, IN (United States)

    2012-01-01

    Purpose: Anatomy contouring is critical in radiation therapy. Inaccuracy and variation in defining critical volumes will affect everything downstream: treatment planning, dose-volume histogram analysis, and contour-based visual guidance used in image-guided radiation therapy. This study quantified: (1) variation in the contouring of organs at risk (OAR) in a clinical test case and (2) corresponding effects on dosimetric metrics of highly conformal plans. Methods and Materials: A common CT data set with predefined targets from a patient with oropharyngeal cancer was provided to a population of clinics, which were asked to (1) contour OARs and (2) design an intensity-modulated radiation therapy plan. Thirty-two acceptable plans were submitted as DICOM RT data sets, each generated by a different clinical team. Using those data sets, we quantified: (1) the OAR contouring variation and (2) the impact this variation has on dosimetric metrics. New technologies were employed, including a software tool to quantify three-dimensional structure comparisons. Results: There was significant interclinician variation in OAR contouring. The degree of variation is organ-dependent. We found substantial dose differences resulting strictly from contouring variation (differences ranging from -289% to 56% for mean OAR dose; -22% to 35% for maximum dose). However, there appears to be a threshold in the OAR comparison metric beyond which the dose differences stabilize. Conclusions: The effects of interclinician variation in contouring organs-at-risk in the head and neck can be large and are organ-specific. Physicians need to be aware of the effect that variation in OAR contouring can play on the final treatment plan and not restrict their focus only to the target volumes.

  16. [Single Port Thoracic Surgery and Reduced Port Thoracic Surgery].

    Science.gov (United States)

    Onodera, Ken; Noda, Masafumi

    2016-07-01

    Single port thoracic surgery, reduced port surgery and needlescopic surgery attract attention as one of the minimally invasive surgery in thoracic surgery recently. Single port thoracic surgery was advocated by Rocco in 2004, it was reported usefulness of single port thoracic surgery for primary spontaneous pneumothorax. The surgical procedure as single (or reduced) port thoracic surgery is roughly divided into the following. One is operated with instruments inserted from the single extended incision, and the other is operated with instruments punctured without extending incision. It is not generally complicated procedures in single port thoracic surgery. Primary spontaneous pneumothorax and biopsy for lung and pleura are considered the surgical indication for single (or reduced) port surgery. It is revealed that single port surgery for primary spontaneous pneumothorax is less invasive than conventional surgery. Single port and reduced port thoracic surgery will spread furthermore in the future. PMID:27440029

  17. Energy systems in surgery

    OpenAIRE

    Pantelić Miloš; Ljikar Jelena; Devečerski Gordana; Karadžić Jelena

    2015-01-01

    Introduction. The systems of energy in surgery are applied in order to achieve better and more effective performing of procedures. Whereas various energy sources, including electricity, ultrasound, laser and argon gas, may be used, the fundamental principle involves tissue necrosis and hemostasis by heating. Electro Surgery. Electro Surgery is a surgical technique by which surgical procedures are performed by focused heating of the tissue using devices base...

  18. I/O-Efficient Algorithms for Computing Contour Lines on a Terrain

    DEFF Research Database (Denmark)

    Agarwal, Pankaj Kumar; Arge, Lars; Sadri, Bardia;

    2008-01-01

    A terrain M is the graph of a bivariate function. We assume that M is represented as a triangulated surface with N vertices. A contour (or isoline) of M is a connected component of a level set of M. Generically, each contour is a closed polygonal curve; at "critical" levels these curves may touch...... each other or collapse to a point. We present I/O efficient algorithms for the following two problems related to computing contours of M: (i) Given a sequence l1

  19. Contouring a guide to the analysis and display of spatial data

    CERN Document Server

    Watson, Debbie

    2013-01-01

    This unique book is the key to computer contouring, exploring in detail the practice and principles using a personal computer. Contouring allows a three dimensional view in two dimensions and is a fundamental technique to represent spatial data. All aspects of this type of representation are covered including data preparation, selecting contour intervals, interpolation and griding, computing volumes and output and display. Formulated for both the novice and the experienced user, this book initially conducts the reader through a step by step explanation of PC software and its application to per

  20. Polar-direct-drive experiments with contoured-shell targets on OMEGA

    Science.gov (United States)

    Marshall, F. J.; Radha, P. B.; Bonino, M. J.; Delettrez, J. A.; Epstein, R.; Glebov, V. Yu.; Harding, D. R.; Stoeckl, C.; Frenje, J. A.; Gatu Johnson, M.; Séguin, F. H.; Sio, H.; Zylstra, A.; Giraldez, E.

    2016-01-01

    Polar-driven direct-drive experiments recently performed on the OMEGA Laser System have demonstrated the efficacy of using a target with a contoured shell with varying thickness to improve the symmetry and fusion performance of the implosion. The polar-driven contoured-shell implosions have substantially reduced low mode perturbations compared to polar-driven spherical-shell implosions as diagnosed by x-ray radiographs up to shell stagnation. Fusion yields were increased by more than a factor of ˜2 without increasing the energy of the laser by the use of contoured shells.