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：

美国国家科学基金会; 美国国家卫生研究院;

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

页码：82 / 89

页数：8

共 10 条

[1] QUANTITATION IN POSITRON EMISSION COMPUTED-TOMOGRAPHY .7. A TECHNIQUE TO REDUCE NOISE IN ACCIDENTAL COINCIDENCE MEASUREMENTS AND COINCIDENCE EFFICIENCY CALIBRATION [J].