Mahsa Noori Asl
Department of Physics, Faculty of Sciences, University of Guilan, Rasht, Iran
[ 1 ] - Review of transmission scanning configurations in cardiac SPECT
The diagnostic accuracy of single photon emission computed tomography (SPECT) is profoundly influenced by attenuation phenomenon. Soft tissue attenuation degrades cardiac SPECT image quality, thereby decreasing the possibility of the detection of the lesions. A variety of correction techniques based on different assumptions have been used to reduce the impact of attenuation. Several types of syst…
[ 2 ] - The Effect of FEW Scatter Correction Method in In-111 Imaging
Introduction: In nuclear medicine imaging, detection of the scattered photons along with the primary photons is one of the major problems that can lead to a decrease in ddiagnostic accuracy. Therefore, use of a suitable scatter correction method can help to improve of the image quality and increase of diagnostic accuracy. The aim of this study is evaluation of five energy window (FEW) method for …
[ 3 ] - Simulation and patient studies of scatter correction in cardiac SPECT imaging
Introduction: Myocardial perfusion imaging is a nuclear medicine imaging method that is used to detect coronary artery diseases. One of the main sources of error in this imaging method is the detection of Compton scattered photons in the photopeak energy window used for data acquisition. This results in the degradation of the image contrast, and therefore decreases the diagnostic accuracy. Materi…
[ 4 ] - طراحی نرم افزاری برای شبیه سازی عملکرد آشکارسازهای گازی به روش مونت کارلو به زبان برنامه‌نویسی c++
در این مقاله ما یک آشکارساز گازی را در نظرگرفته ایم و فرض کرده ایم بخاطر عبور پرتو یونساز یک الکترون درآن ایجاد گردد، با شبیه سازی عددی سیستم با در نظر گرفتن برخوردها و ایجاد الکترونهای ثانوی مسیر حرکت الکترون اولیه و الکترونهای ثانوی را با مفهوم روش مونت کارلو بدست آورده ایم. وابستگی تعداد الکترونهای ثانوی ایجاد شده به ولتاژ الکتریکی اعمالی و همچنین فشار گاز داخل آشکارساز بررسی شده است، نهایتا و…
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