نتایج جستجو برای: entrance surface dose esd

تعداد نتایج: 943423  

Journal: :Radiation protection dosimetry 2014
Andrew G Davies Amber J Gislason-Lee Arnold R Cowen Stephen M Kengyelics Michael Lupton Janet Moore Mohan Sivananthan

The impact of spectral filtration in digital ('cine') acquisition was investigated using a flat panel cardiac interventional X-ray imaging system. A 0.1-mm copper (Cu) and 1.0-mm aluminium (Al) filter added to the standard acquisition mode created the filtered mode for comparison. Image sequences of 35 patients were acquired, a double-blind subjective image quality assessment was completed and ...

2017
D. Shahbazi-Gahrouei

Over the past hundred years or so, X-rays have been used for diagnostic purposes. The use of X-rays for imaging purposes, however, exposes patients to ionizing radiation. The increasing use of X-ray in hospitals has made medical exposure an important source of radiation in the population collective dose (1, 2). Ionizing radiation has the ability to break apart biologically important molecules s...

ژورنال: :مجله دانشگاه علوم پزشکی مازندران 0
مریم پورکاوه maryam pourkaveh radiology instructor, department of radiology, faculty of paramedicine, hamedan university of medical sciences, hamedan, iranگروه رادیولوژی، دانشکده پیراپزشکی، دانشگاه علوم پزشکی همدان، همدان، ایران صفورا نیکزاد safoora nikzad 2 assisstant professor, department of medical physics, faculty of medicine, hamedan university of medical sciences, hamedan, iranگروه فیزیک پزشکی، دانشکده پزشکی، دانشگاه علوم پزشکی همدان، همدان، ایران نقی جباری وصال naghi jabbari vesa assisstant professor, department of medical physics, faculty of medicine, hamedan university of medical sciences, hamedan, iranگروه فیزیک پزشکی، دانشکده پزشکی، دانشگاه علوم پزشکی همدان، همدان، ایران

سابقه و هدف: با افزایش استفاده از پرتوهای ایکس در تشخیص پزشکی، آگاهی از میزان دوز دریافتی بیماران و مقایسه آن با سطح استاندارد جهانی ضروری است. هدف از این مطالعه، تخمین دوز ورودی سطح (esd :entrance surface dose) و دوز مؤثر (effective dose: ed) بیماران در تصویربرداری (قفسه سینه و شکم) با سیستم های رادیولوژی تشخیصی در شهر همدان بود. در مرحله بعدی، مقادیر اندازه گیری‎شده با نتایج گزارش‎شده از دیگر...

احسانی, سینا , خرمی مقدم, علیرضا , فلاح محمدی, غلامرضا , مردانشاهی, علیرضا ,

Background and purpose: Estimation of the risks of radiation would be possible by identifying the dose received. Introducing the dose level from diagnostic procedures can be effective in reducing the patient dose, improving the quality of treatment, and increasing the safety of patients and staff. This study evaluated patient entrance surface dose (ESD), effective dose, and cumulative dose from...

2011
A. Sulieman A. A. Ibrahim H. Osman M. Yousef

Extracorporeal shockwave lithotripsy (ESWL) is considered the gold standard for calculi fragmentation. The aims of this study are to measure the entrance surface dose (ESD) using thermo-luminescence dosimeter (TLDs) and to estimate the probability of carcinogenesis during ESWL procedure. The study was carried out at two centers (Group A, 50 patients) and (Group B, 25 patients). The mean ESD and...

Introduction: Coronary angiography is the most common angiographic procedure for diagnosis and treatment of the heart diseases. Herein, we aimed to evaluate the entrance surface dose (ESD), dose area product (DAP), as well as cancer risk in interventional cardiology procedures. Materials and Methods: This study was conducted during July-December 2015 at Shahid Madani Heart Center in Khorramabad...

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2006
Ana Cecília Pedrosa de Azevedo Adelaja Otolorin Osibote Márcia Cristina Bastos Boechat

OBJECTIVE This work aims to evaluate the entrance surface dose (ESD), the body organ dose (BOD) and the effective dose (E) resulting from pediatric radiological procedures with the use of portable X-ray equipments. MATERIALS AND METHODS The software DoseCal was used to evaluate the doses imparted to patients. The children were classified according to their weight and age groups, and the study...

جباری وصال, نقی, نیکزاد, صفورا, پورکاوه, مریم,

Background and purpose: By increasing use of X-ray in medical diagnosis, it is essential to gain awareness on the amount of absorbed dose in patients according to the world standard levels. The aim of this study was to estimate the entrance surface dose (ESD) and effective dose (ED) of the patients in imaging (chest and abdomen) with diagnostic radiology systems in Hamadan, Iran; and comparing ...

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