نتایج جستجو برای: tumor variability

تعداد نتایج: 597804  

2017

A critical step in radiotherapy treatment planning process is to accurately locate the tumor and determine its extent. Variability in gross tumor volume (GTV) delineation is a major source of systematic error in conformal radiotherapy. CT scan is the principle source of imaging data used for defining GTV for planning conformal therapy. CT is widely available less costly and compatible with radi...

Journal: :nephro-urology monthly 0
mohamadreza nowroozi uro-oncology research center, tehran university of medical sciences, tehran, ir iran mohsen ayati uro-oncology research center, tehran university of medical sciences, tehran, ir iran amir arbab uro-oncology research center, tehran university of medical sciences, tehran, ir iran hassan jamshidian uro-oncology research center, tehran university of medical sciences, tehran, ir iran hamidreza ghorbani department of urology, qazvin university of medical sciences, qazvin, ir iran hassan niroomand uro-oncology research center, tehran university of medical sciences, tehran, ir iran

conclusions pc-rplnd is one the major operations in the field of urology, which is associated with significant adjunctive surgeries. in appropriate cases, pc-rplnd was associated with good cancer specific survival in tertiary oncology center. results twenty-one patients underwent bilateral pc-rplnd. mean age was 26.3 years (ranged 16 - 47). mean size of retroperitoneal mass after chemotherapy w...

Bladder cancer is one of the most common forms of cancers in the world. The current gold standards for itsdiagnosis are cystoscopy and urine cytology. Cystoscopy, a naked eye assessment of the bladder, is invasive, uncomfortable and costly with a great deal of personal variability in its results; while urine cytology has high specificity but low sensitivity, particularly for low-grade les...

2016
Hyungjin Kim Chang Min Park Myunghee Lee Sang Joon Park Yong Sub Song Jong Hyuk Lee Eui Jin Hwang Jin Mo Goo

PURPOSE To identify the impact of reconstruction algorithms on CT radiomic features of pulmonary tumors and to reveal and compare the intra- and inter-reader and inter-reconstruction algorithm variability of each feature. METHODS Forty-two patients (M:F = 19:23; mean age, 60.43±10.56 years) with 42 pulmonary tumors (22.56±8.51mm) underwent contrast-enhanced CT scans, which were reconstructed ...

ژورنال: پژوهش در پزشکی 2012
زالی, علیرضا , عارفیان, نور محمد ,

Abstract Many studies have been conducted on heart rate variability. Variability in the heart signal of two sequential beats is called heart rate variability (HRV). Short- and long- term variability reflects autonomic nervous system function, so that increased or decreased heart rate variability (HRV) is an indicator of human health. So, the analysis of these changes can predict sudden death...

2009
David Dingli F. A. C. C. Chalub F. C. Santos S. Van Segbroeck

There is variability in the cancer phenotype across individuals: Two patients with the same tumor may experience different disease life histories, resulting from genetic variation within the tumor and from the interaction between the tumor and the host. Up to now, phenotypic variability has precluded a clear-cut identification of the fundamental characteristics of a given tumor type. Here we sh...

Journal: :فصلنامه علوم پزشکی دانشگاه آزاد اسلامی واحد پزشکی تهران 0
معصومه همت یار masoumeh hemaatyar تهران، بیمارستان جواهری، بخش اطفال معصومه رباطی میلی masoumeh robat mili تهران، بیمارستان جواهری، بخش اطفال

background: neuroblastoma is the most common tumor in infancy and wilms’ tumor is the most common malignant tumor of kidney in childhood. both the tumors are usually within the differential diagnosis of each other. this study compares the clinical manifestations, sex and age distribution of childhood wilms’ tumor and neuroblastoma at one of tehran children hospitals. materials and methods: the ...

Journal: :medical journal of islamic republic of iran 0
h. froutan department of gastroenterology, imam khomeini hospital, tehran university ofmedical sciences (tums), tehran, iranسازمان اصلی تایید شده: دانشگاه تهران (tehran university)سازمان های دیگر: imam khomeini hospital, a. shafaghi department of gastroenterology, imam khomeini hospital, tumsسازمان های دیگر: imam khomeini hospital, m. hashemi khatam-al-anbia hospitalسازمان اصلی تایید شده: دانشگاه شاهد (shahed university) s. shariat-torbaghan imam khomeini medical hospital,tumsسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences)

abstract gastrointestinal mesenchymal tumors are a group of tumors originating from the mesenchymal stem cells of the gi tract. digestive tract schwannomas are rare mesenchymal tumors which occur most frequently in the stomach. we report a 56-yearold woman who was examined endoscopically for dyspepsia which she had suffered from since 3 years ago. around gastric antral mass was seen. surgical r...

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