نتایج جستجو برای: entrance surface dose esd

تعداد نتایج: 943423  

بهروزکیا, ژاله , شهبازی گهرویی, داریوش ,

زمینه و هدف: بیشترین پرتوگیری مردم از منابع پرتو ساخت بشر، ناشی از آزمایش های تشخیصی با پرتو ایکس می باشد که این امر به دلیل اجتناب ناپذیر بودن تشخیص با پرتوهای ایکس و همچنین تعداد آنها در میان افراد جامعه می باشد. برای عملی کردن برنامه کاهش دوز جذبی بیماران و در عین حال افزایش کیفیت تصاویر رادیوگرافی در بیمارستان های وابسته به دانشگاه علوم پزشکی استان دوز سطحی بیماران و نیز دوز مؤثر آنان اند...

2016
Yohei Inaba Koichi Chida Ryota Kobayashi Masayuki Zuguchi

There are case reports of injuries caused by the radiation from interventional radiology (IVR) X-ray systems. Therefore, the management of radiation doses in IVR is important. However, no detailed report has evaluated image quality for a large number of IVR X-ray systems. As a result, it is unclear whether the image quality of the X-ray equipment currently used in IVR procedures is optimal. We ...

Journal: :Journal of the Korean Society of Radiology 2011

2012
Mohammad Taghi Bahreyni Toossi Malakeh Malekzadeh

BACKGROUND With the increase of X-ray use for medical diagnostic purposes, knowing the given doses is necessary in patients for comparison with reference levels. The concept of reference doses or diagnostic reference levels (DRLs) has been developed as a practical aid in the optimization of patient protection in diagnostic radiology. OBJECTIVES To assess the radiation doses to neonates from d...

Journal: :Radiation Science and Technology 2023

The hyperconsciousness of radiation dose delivered to the patient during chest radiological X-ray procedures are prerequisite negate menace exposure. pinpoint this research is inquest doses received by for routine individual x-ray in health care system associated Kebbi State Government, Nigeria. Entrance Surface Dose and effective accordance with exposure factors collected real examinations wer...

Journal: :iranian journal of radiation research 0
a. mesbahi department of medical physics, medical school, tabriz university of medical sciences, tabriz, iran a. r. naseri department of radiation oncology, imam-khomeini hospital, tabriz, iran gh. oskoi department of radiation oncology, imam-khomeini hospital, tabriz, iran

background: in vivo dosimetry is a method for estimation of overall error in the delivered dose to the patients at the end of radiotherapy process. in this research, two methods for target dose calculation were evaluated on midline and central axis of photon beams in in vivo dosimetry of thorax fields. materials and methods: entrance and exit doses for anterior and lateral fields of thorax were...

Journal: :The British journal of radiology 2000
R Ruiz-Cruces F Ruiz M Pérez-Martínez J López I Tort Ausina A D de los Ríos

The objective of this work was to estimate patient doses (dose-area product, organ dose, effective dose and entrance surface dose) for barium procedures. A total of 175 procedures, in 175 patients, for five different examination categories was analysed. Dose-area product was determined using a transmission ionization chamber. Organ dose and effective dose were assessed using a knowledge of the ...

Journal: :iranian journal of medical physics 0
mohammad taghi bahreyni toossi medical physics department, medical physics research center, mashhad university of medical sciences, mashhad, iran.

introduction the present work describes a study in which, based on patient dose measurements, thermoluminescent dosimeters were used to obtain the diagnostic reference level arising from panoramic radiography. materials and methods ten panoramic units and a sample of 15 patients per x-ray unit were studied. two thermoluminescent dosimeter chips were placed on the skin surface of selected organs...

Journal: :International journal of radiation research 2021

Evaluation of entrance surface dose and scattered to the pelvis for common radiological examinations in analog digital radiography: A phantom study

E. Gyan, G. Amoako, S. Inkoom,

Background: The basic challenge with computed radiography (CR) systems is the large dynamic range which provides an opportunity for radiographers to gradually increase exposure factors and still produce good image quality, a practice that can lead to dose creep. Materials and Methods: The aim of this study was to establish  the entrance skin dose (ESD) values for nine selected examinations in t...

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