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Titolo:
HETEROGENEITY OF SPECT BULLS-EYES IN NORMAL DOGS - COMPARISON OF ATTENUATION COMPENSATION ALGORITHMS
Autore:
DIBELLA EVR; EISNER RL; SCHMARKEY LS; BARCLAY AB; PATTERSON RE; NOWAK DJ; LALUSH DS; TSUI BMW;
Indirizzi:
GEORGIA INST TECHNOL,DEPT ELECT ENGN ATLANTA GA 30332 EMORY UNIV,CRAWFORD LONG HOSP,DEPT MED CARDIOL ATLANTA GA 30365 EMORY UNIV,CRAWFORD LONG HOSP,CARLYLE FRASER HEART CTR,DEPT RADIOL ATLANTA GA 30365 GE CO,MED SYST SCHENECTADY NY 12301 UNIV N CAROLINA,DEPT BIOMED ENGN CHAPEL HILL NC 00000
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 4, volume: 42, anno: 1995,
parte:, 1
pagine: 1290 - 1296
SICI:
0018-9499(1995)42:4<1290:HOSBIN>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONUNIFORM ATTENUATION; COMPUTED-TOMOGRAPHY; RECONSTRUCTION; PHANTOM; TL-201;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
E.V.R. Dibella et al., "HETEROGENEITY OF SPECT BULLS-EYES IN NORMAL DOGS - COMPARISON OF ATTENUATION COMPENSATION ALGORITHMS", IEEE transactions on nuclear science, 42(4), 1995, pp. 1290-1296

Abstract

In normal dogs, SPECT Tc-99m Sestamibi (MIBI) and Tl-201 myocardial perfusion images reconstructed with filtered backprojection (FBP) show a large decrease of counts in the septal wall (S) compared to the lateral wall (L). We evaluated the iterative method of Chang at 0 and 1 iterations (Chang0 and Chang1), and the Maximum Likelihood-Expectation Maximization with attenuation compensation (ML-EM-ATN) algorithm on data acquired from 5 normal dogs and from simulated projection data usinga homogeneous count-density model of a normal canine myocardium in the attenuation field measured in one dog. Mean counts in the S and L regions were calculated from maximum-count circumferential profile arrays. The table shows mean +/- s.d. S/L count ratios. [GRAPHICS] Our results demonstrate that ML-EM-ATN and Chang1 result in improved uniformity, as measured by the S/L ratio.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 01:10:16