نتایج جستجو برای: فیلم ebt
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هدف دزیمتری، اندازه گیری مقدار انرژی در واحد جرم ماده است. برای این کار از ابزارهای سنجش مخصوصی به نام دزیمتر استفاده می شود. دز جذب شده در بخش حساس این ابزارها معیاری برای محاسبه مقدار دز جذب شده توسط بیمار یا ماده مورد نظر است. دزیمتر ی نسبتا" ایده ال است که مستقل از انرژی تشعشع بوده و یا حداقل، پاسخ آن در برابر انرژی پرتو کاملاّْ معین و شناخته شده باشد. دزیمتر ایده الی که بتواند به نیازهای معم...
مقطع نگاری عرضی کامپیوتری(ct-scan) یکی از روشهای تصویربرداری است که در آن با استفاده از پرتو ایکس تصاویر مقطعی از بدن با تباین (کنتراست) و تفکیک پذیری (رزولوشن) بالا به دست میآید. با این حال پرتودهی ناشی از آزمونهای مقطع نگاری عرضی کامپیوتری نسبت به سایر روشهای تصویربرداری باعث انتقال دز بیشتر به افراد میشود. هدف از این مطالعه ارزیابی نحوه توزیع دز در یک فانتوم معادل بافتاز جنس پلی متیل مت...
background: ebt and ebt3 radiochromic films have been used in radiotherapy dosimetry for years. objective: the aim of the current study is to compare ebt and ebt3 radiochromic films in dosimetry of radiotherapy fields for treatment of parotid cancer. methods: calibrations of ebt and ebt3 films were performed with identical setups using a 6 mv photon beam of a siemens primus linac. skin dose was...
OBJECTIVES This investigation was designed to determine the relationship between National Cholesterol Education Program (NCEP) ATP-II lipid guidelines and subclinical atherosclerosis, defined by electron beam tomography (EBT) calcified coronary plaque, in asymptomatic women. BACKGROUND NCEP guidelines are used to identify women at increased risk for coronary artery disease (CAD) on the basis ...
Purpose. To assess for differences in clinical, radiologic, and pathologic outcomes between patients with stage II-III rectal adenocarcinoma treated neoadjuvantly with conventional external beam radiotherapy (3D conformal radiotherapy (3DRT) or intensity-modulated radiotherapy (IMRT)) versus high-dose-rate endorectal brachytherapy (EBT). Methods. Patients undergoing neoadjuvant EBT received 4 c...
BACKGROUND A modified form of high dose rate (HDR) brachytherapy has been developed called Axxent Electronic Brachytherapy (EBT). EBT uses a kilovolt X-ray source and does not require treatment in a shielded vault or a HDR afterloader unit. A multi-center clinical study was carried out to evaluate the success of treatment delivery, safety and toxicity of EBT in patients with endometrial cancer....
BACKGROUND Since exchange blood transfusion (EBT) is associated with serious complications, phototherapy has been made more powerful to reduce the need for EBT in the developed world. This study was undertaken to determine the indications for EBT in neonatal jaundice (NNJ) at our unit and what proportion of EBTs was possibly avoidable. METHODS All the babies who had EBT for hyperbilirubinemia...
BACKGROUND It has been suggested that exhaled breath temperature (EBT) is increased in asthmatic subjects. OBJECTIVES Our aim was to investigate EBT in asthmatics compared to healthy controls before and after eucapnic voluntary hyperventilation (EVH) and a methacholine challenge test (MCT). METHODS A total of 26 asthmatics and 29 healthy controls were included. Forced expiratory volume in 1...
With the emergence of service-oriented computing technology, companies embrace new ways of carrying out business transactions electronically. Since the parties involved in an electronic business transaction (eBT) manage a heterogeneous information-systems infrastructure within their organizational domains, the collaboration complexity is considerable and safeguarding an interorganizational coll...
Objective Public-sector behavioral health systems seeking to implement evidence-based treatments (EBTs) may face challenges selecting EBTs given their limited resources. This study describes and illustrates one method to calculate cost related to training and consultation to assist system-level decisions about which EBTs to select. Methods Training, consultation, and indirect labor costs were...
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