Activity and attenuation recovery from activity data only in emission computed tomography

被引：0
|
作者：
De Pierro, Alvaro R. [1 ]
Crepaldi, Fabiana [1 ]
机构：
[1] Univ Estadual Campinas, Dept Appl Math, BR-13081970 Campinas, SP, Brazil
来源：
COMPUTATIONAL & APPLIED MATHEMATICS | 2006年 / 25卷 / 2-3期
基金：
巴西圣保罗研究基金会;
关键词：
Attenuated Radon Transform; maximum likelihood; emission tomography;
D O I：
暂无
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
We describe the continuous and discrete mathematical models for Emission Computed Tomography (ECT) and the need for attenuation correction. Then we analyse the problem of retrieving the attenuation directly from the emission data, nonuniqueness and its consequences. We present the existing and new approaches for solving the problem. Methods are compared and illustrated by numerical simulations. The presentation focuses on Positron Emission Tomography, but we also discuss the extensions to Single Photon Emission Computed Tomography.
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页码：205 / 227
页数：23
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