Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/68774
Type: Artigo de periódico
Title: ON THE RELATION BETWEEN THE ISRA AND THE EM ALGORITHM FOR POSITRON EMISSION TOMOGRAPHY
Author: DEPIERRO, AR
Abstract: The image space reconstruction algorithm (ISRA) was proposed as a modification of the expectation maximization (EM) algorithm based on physical considerations for application in volume emission computed tomography. As a consequence of this modification, ISRA searches for least squares solutions instead of maximizing Poisson likelihoods as the EM algorithm. In this paper, we show that both algorithms may be obtained from a common mathematical framework. We use this fact to extend ISRA for penalized likelihood estimates.
Editor: Ieee-inst Electrical Electronics Engineers Inc
Rights: fechado
Identifier DOI: 10.1109/42.232263
Date Issue: 1993
Appears in Collections:Unicamp - Artigos e Outros Documentos

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