Document Details

Document Type : Project 
Document Title :
Assessment of Breast Doses in Mammography Procedures
تقدير جرعات الثدي في طرق التصوير الإشعاعي
 
Subject : Assessment of Breast Doses in Mammography Procedures 
Document Language : Arabic 
Abstract : Diagnostic exposure for medical examinations are generally low and based on the clinical needs as well as justified for the sake of benefits of accurate diagnosis of possible disease conditions. Standardized radiation dose estimates are required for a number of typical diagnostic medical procedures. Mammography is one of such widely used process for breast screening of small malignant lesions in the female breast. The use of ionizing radiation also implies the risk of fatal breast cancers. The suggested typical doses are supposed to be kept below, as far as practicable, for some typical diagnostic radiology. In practice doses change depending on specific machine and manufacturer and study technique involving frequent over exposure than clinical needs. As such the estimation of absorbed dose to the breast is an important part of Quality Control of the mammographic examinations. Mean glandular dose (MGD) is generally calculated on the assumption of tissue composition and thickness of compressed breast from dosimetric quantities and measurements. The representatives for average-sized female breast of average tissue composition phantoms are often used for entrance dose measurements. Additionally, it is possible to assess MGD based on measurements for a representative samples from among the real patients examined. In view of the fact that the advantage of measurements on phantoms compared to patients, results are more reproducible because variations due to influence of the patients are avoided. It is intended to use representative PMMA phantoms along with representative patients as far as practicable. The proposed project aims at dose assessment (air kerma and MGD) in mammography, the influence of exposure conditions and setting up optimal reference doses using ionization chambers and high precision TLD measurements (high sensitivity TLD-100H chips/cubes) as well as known exposure parameters and measurements of tube output. The research works shall be accomplished around the X-ray machines dedicated for mammography in the radiology Department, King Abdulaziz University hospital using PMMA breast phantoms and some patients in applicable cases. The outcome on completion of the planned research works under the project will contribute in reducing mammography doses to glandular tissue i.e. MGD establishing Quality Control procedures, and thereby reduce the risk of inducing mammary cancer from mammography examinations. 
Publishing Year : 1428 AH
2007 AD 
Sponsor Name : King Abdulaziz University 
Sponsorship Year : 1428 AH
2007 AD 
Added Date : Tuesday, June 29, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
عبد الرءوف ميمنى ميمنىMimani, Abdulrauf MimaniInvestigatorDoctorate 

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 27181.docx docx 

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