Energy Window Optimization Using Triple Energy Window Scatter Correction Method for In-۱۱۱ SPECT Imaging: A SIMIND Monte Carlo Study
- سال انتشار: 1400
- محل انتشار: مجله فیزیک پزشکی ایران، دوره: 18، شماره: 5
- کد COI اختصاصی: JR_IJMP-18-5_001
- زبان مقاله: انگلیسی
- تعداد مشاهده: 320
نویسندگان
Department of Physics, LPHE, Modeling and Simulations, Faculty of Science, Mohammed V University, Rabat, Morocco
Department of Physics, LPHE, Modeling and Simulations, Faculty of Science, Mohammed V University, Rabat, Morocco
Higher Institute of Health Sciences Settat, University HASSAN, Rabat, Morocco
Academic Hospital of Udine, Medical Physics Department, Italy
چکیده
Introduction: Detecting scattered photons in the photo peak window degrades the image contrast and quantitative accuracy of single-photon emission computed tomography (SPECT) imaging. This study aimed to determine optimal main- and sub-energy windows for Triple Energy Window (TEW) in In-۱۱۱. Material and Methods: We used the simulating medical imaging nuclear detectors (SIMIND) program to simulate the Siemens SYMBIA gamma camera equipped with a medium energy (ME) collimator. We also used the SIMIND Monte Carlo program to generate theIn-۱۱۱SPECT projection data of the Jaszczak phantom. The phantom consisting of six spheres with different diameters (۹.۵, ۱۲.۷, ۱۹.۱, ۱۵.۹, ۲۵.۴, and ۳۱.۸ mm) was used to evaluate the image contrast. Geometric, scatter, and penetration fraction, point spread functions, and contrast curves were drawn and compared. Results: The results showed that the ۱۷۱keVphotopeak compared to the ۲۴۵keVphotopeak yielded the best results with an ME collimator when the TEW scatter correction method was applied. The reason can be the large amount of scatter and penetration from the photo peak and the collimator for the ۲۴۵keVphotopeak window. Conclusion: With the TEW scatter correction method, it is better to use a ۱۷۱keVphotopeak window because of its better spatial resolution and image contrast.کلیدواژه ها
SPECT Contrast In, ۱۱۱ SIMIND Programاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.