Vector entropy imaging theory with application to computerized tomography.
Medical imaging theory for x-ray CT and PET is based on image reconstruction from projections. In this paper a novel vector entropy imaging theory under the framework of multiple criteria decision making is presented. We also study the most frequently used image reconstruction methods, namely, least square, maximum entropy, and filtered back-projection methods under the framework, of the single performance criterion optimization. Finally, we introduce some of the results obtained by various reconstruction algorithms using computer-generated noisy projection data from the Hoffman phantom and real CT scanner data. Comparison of the reconstructed images indicates that the vector entropy method gives the best in error (difference between the original phantom data and reconstruction), smoothness (suppression of noise), grey value resolution and is free of ghost images.
Wang
Yuanmei
Y
The Key Laboratory of Biomedical Engineering, Ministry of Education of China, Zhejiang University, Hangzhou, People's Republic of China.
Cheng
Jianping
J
Heng
Pheng Ann
PA
D000465:Algorithms; D001921:Brain / Q000000981:diagnostic imaging; D006801:Humans; D019047:Phantoms, Imaging; D011786:Quality Control; D011856:Radiographic Image Enhancement / Q000295:instrumentation / Q000379:methods*; D013269:Stochastic Processes; D014057:Tomography, X-Ray Computed / Q000379:methods*