کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
505885 864544 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An improved ordered subsets expectation maximization positron emission computerized tomography reconstruction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
An improved ordered subsets expectation maximization positron emission computerized tomography reconstruction
چکیده انگلیسی

Ordered subsets expectation maximization (OS-EM) reconstruction method is usually used in positron emission tomography (PET). But it has some disadvantage such as long computation time and bad reconstruction quality. Filtered back projection (FBP), that has many advantages such as simple structure and short reconstruction time, is firstly introduced into the initialization stage of the OS-EM to fast the reconstruction process. Then, the smoothness method is applied after the OS-EM algorithm to improve the reconstruction speed and quality. The reconstructed images are compared for both the simulated phantom data and the brain magnetic resonance imaging data. The improved OS-EM is shown to be more feasible than the standard OS-EM within the same iteration steps and in higher signal noise ratio (SNR) condition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers in Biology and Medicine - Volume 37, Issue 12, December 2007, Pages 1780–1785
نویسندگان
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