Document Details

Document Type : Thesis 
Document Title :
Feasibility of a Novel Gamma Radiography Mammo System
قابلية استخدام أشعة جاما لتصوير الثدي من خلال استخدام جهاز جديد
 
Subject : Faculty of Engineering - Department of Nuclear Engineering 
Document Language : Arabic 
Abstract : Aim: This research aims to study gamma radiography feasibility in mammography. Materials and Methods: A novel mammography imaging system was designed, developed and tested through simulation and experimental work. GATE simulation package was used to define the feasibility limits and test several parameters including energy range, breast thickness, source size and dose. An ACR-like mammography phantom was generated in simulation and the produced images were used in the visually and analytically assessment. The experimental work was conducted using a radioactive Am-241 source alongside computed radiography image receptors to produce images of the ACR mammography phantom. Additionally, small lead openings were used to minimize the source size and consequently improve resolution. All images were processed and enhanced using an application created by the Visualization Toolkit. A specially developed technique was used to correct the radiation field inhomogeneity and a morphological operator technique was used to extract automatically regions of interest from the simulated images for the contrast and signal-to-noise ratio estimation. Results: The results of the analytical and visual assessment demonstrated that gamma radiation of 35 keV energy or less produces acceptable mammography images. Higher energy photons produced mammography images but did not pass the rigorous clinical acceptable tests. The maximum feasible cylindrical source size was found to be 4 mm in diameter and 5 mm in thickness. Am-241 source showed to be feasible in simulation with energy sensitive detectors and produce an average glandular dose of 1.2 mGy. Conclusion: Gamma radiation was found to be feasible for producing clinically acceptable mammography images with sources emitting 35 keV or less and cylindrical sources up to 5 mm in thickness and 4 mm in diameter. 
Supervisor : Prof. Abdalmajeid Alyassin 
Thesis Type : Master Thesis 
Publishing Year : 1437 AH
2016 AD 
Added Date : Tuesday, February 9, 2016 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
إسلام محمد طهTaha, Eslam MuhammedResearcherMaster 

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