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Proceedings Paper

Physical phantom evaluation of EM-IntraSPECT (EMIS) algorithm for nonuniform attenuation correction in cardiac imaging
Author(s): Andrzej Krol; James E. Bowsher; David H. Feiglin; George M. Gagne; Bradford J. Hellwig; Martin P. Tornai; Frank Deaver Thomas
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Paper Abstract

The purpose of this study was to evaluate performance of the EM-IntraSPECT (EMIS) algorithm for non-uniform attenuation correction in the chest. EMIS is a maximum-likelihood expectation maximization (MLEM) algorithm for simultaneously estimating SPECT emission and attenuation parameters from emission data alone. EMIS uses the activity within the patient as transmission tomography sources, with which attenuation coefficients can be estimated. A thorax phantom with a normal heart was used. The activity images reconstructed by EMIS were compared to images reconstructed using a conventional MLEM with a fixed uniform attenuation map. Uniformity of normal heart was improved with EMIS as compared to a conventional MLEM.

Paper Details

Date Published: 3 July 2001
PDF: 5 pages
Proc. SPIE 4322, Medical Imaging 2001: Image Processing, (3 July 2001); doi: 10.1117/12.430966
Show Author Affiliations
Andrzej Krol, SUNY Upstate Medical Univ. (United States)
James E. Bowsher, Duke Univ. Medical Ctr. (United States)
David H. Feiglin, SUNY Upstate Medical Univ. (United States)
George M. Gagne, SUNY Upstate Medical Univ. (United States)
Bradford J. Hellwig, SUNY Upstate Medical Univ. (United States)
Martin P. Tornai, Duke Univ. Medical Ctr. (United States)
Frank Deaver Thomas, SUNY Upstate Medical Univ. (United States)

Published in SPIE Proceedings Vol. 4322:
Medical Imaging 2001: Image Processing
Milan Sonka; Kenneth M. Hanson, Editor(s)

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