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Titolo:
QUANTITATIVE CARDIAC SPECT RECONSTRUCTION WITH REDUCED IMAGE DEGRADATION DUE TO PATIENT ANATOMY
Autore:
TSUI BMW; ZHAO XD; GREGORIOU GK; LALUSH DS; FREY EC; JOHNSTON RE; MCCARTNEY WH;
Indirizzi:
UNIV N CAROLINA,DEPT BIOMED ENGN CHAPEL HILL NC 00000 UNIV N CAROLINA,DEPT RADIOL CHAPEL HILL NC 00000
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 6, volume: 41, anno: 1994,
parte:, 2
pagine: 2838 - 2844
SICI:
0018-9499(1994)41:6<2838:QCSRWR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATTENUATION CORRECTION; COMPUTED-TOMOGRAPHY; ALGORITHMS; EMISSION; EM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
B.M.W. Tsui et al., "QUANTITATIVE CARDIAC SPECT RECONSTRUCTION WITH REDUCED IMAGE DEGRADATION DUE TO PATIENT ANATOMY", IEEE transactions on nuclear science, 41(6), 1994, pp. 2838-2844

Abstract

Patient anatomy has complicated effects on cardiac SPECT images. We investigated reconstruction methods which substantially reduced these effects for improved image quality. A 3D mathematical cardiac-torso (MCAT) phantom which models the anatomical structures in the thorax region were used in the study. The phantom was modified to simulate variations in patient anatomy including regions of natural thinning along themyocardium, body size, diaphragmatic shape, gender, and size and shape of breasts for female patients. Distributions of attenuation coefficients and Tl-201 uptake in different organs in a normal patient were also simulated. Emission projection data were generated from the phantoms including effects of attenuation and detector response. We have observed the attenuation-induced artifacts caused by patient anatomy in the conventional FBP reconstructed images. Accurate attenuation compensation using iterative reconstruction algorithms and attenuation maps substantially reduced the image artifacts and improved quantitative accuracy. We conclude that reconstruction methods which accurately compensate for non-uniform attenuation can substantially reduce image degradation caused by variations in patient anatomy in cardiac SPECT.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:32:57