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Titolo:
Resolution recovery for list-mode reconstruction in SPECT
Autore:
Bouwens, LR; Gifford, H; Van de Walle, R; King, MA; Lemahieu, I; Dierckx, RA;
Indirizzi:
State Univ Ghent, IBITECH, MEDISIP, ELIS Dept, B-9000 Ghent, Belgium StateUniv Ghent Ghent Belgium B-9000 , ELIS Dept, B-9000 Ghent, Belgium Univ Massachusetts, Sch Med, Div Nucl Med, Worcester, MA USA Univ Massachusetts Worcester MA USA Med, Div Nucl Med, Worcester, MA USA State Univ Ghent Hosp, Dept Nucl Med, B-9000 Ghent, Belgium State Univ Ghent Hosp Ghent Belgium B-9000 cl Med, B-9000 Ghent, Belgium
Titolo Testata:
PHYSICS IN MEDICINE AND BIOLOGY
fascicolo: 8, volume: 46, anno: 2001,
pagine: 2239 - 2253
SICI:
0031-9155(200108)46:8<2239:RRFLRI>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
ITERATIVE RECONSTRUCTION; ACTIVITY QUANTITATION; IMAGE-RECONSTRUCTION; LIKELIHOOD; PROJECTION; EMISSION; SYSTEM; ATTENUATION; TOMOGRAPHY; ALGORITHM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Bouwens, LR State Univ Ghent, IBITECH, MEDISIP, ELIS Dept, Sint Pietersnieuwstr 41, B-9000 Ghent, Belgium State Univ Ghent Sint Pietersnieuwstr 41 Ghent Belgium B-9000
Citazione:
L.R. Bouwens et al., "Resolution recovery for list-mode reconstruction in SPECT", PHYS MED BI, 46(8), 2001, pp. 2239-2253

Abstract

The purpose of the study was to evaluate the resolution recovery in the list-mode iterative reconstruction algorithm (LMIRA) for SPECT. In this studywe compare the performance of the proposed method with other iterative resolution recovery methods for different noise levels. We developed an iterative reconstruction method which uses list-mode data instead of binned data. The new algorithm makes use of a more accurate model of the collimator structure. We compared the SPECT list-mode reconstruction with MLEM, OSEM and RBI. all including resolution recovery, For the evaluation we used Gaussianshaped sources with different FWHM at three different locations and three noise levels. For these distributions we calculated the reconstructed images for a different number of iterations. The absolute error for the reconstructed images was used to evaluate the performance. The performance of all four methods is comparable for the sources located in the centre of the field of view. For the sources located out of the centre, the error of the list-mode method is significantly lower than that of the other methods. Splitting the system model into a separate object-de pendent and detector-dependent module gives us a flexible reconstruction method. With this we can very easily adapt the resolution recovery to different collimator types.

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Documento generato il 22/01/20 alle ore 06:44:43