CORRECTIONS FOR ACCIDENTAL COINCIDENCES AND ATTENUATION IN MAXIMUM-LIKELIHOOD IMAGE-RECONSTRUCTION FOR POSITRON-EMISSION TOMOGRAPHY

被引：112
|
作者：
POLITTE, DG
SNYDER, DL
机构：
[1] Washington University, St. Louis, MO
来源：
IEEE TRANSACTIONS ON MEDICAL IMAGING | 1991年 / 10卷 / 01期
基金：
美国国家卫生研究院; 美国国家科学基金会;
关键词：
D O I：
10.1109/42.75614
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A new method has been developed and tested for correcting for the effects of accidental coincidences and photon attenuation in positron-emission tomography. A mathematical model is used for these effects as the basis for the development. The corrections are incorporated into the iterations of an expectation-maximization algorithm for numerically producing the maximum-likelihood estimate of a distribution of radioactivity within a patient. We have found the images reconstructed with this new procedure to be unbiased and to exhibit lower variance than those reconstructed from precorrected data.
引用
收藏
页码：82 / 89
页数：8
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