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Titolo:
Comparison of 3-D reconstruction with 3D-OSEM and with FORE plus OSEM for PET
Autore:
Liu, X; Comtat, C; Michel, C; Kinahan, P; Defrise, M; Townsend, D;
Indirizzi:
Free Univ Brussels, Div Nucl Med, AZ, B-1090 Brussels, Belgium Free Univ Brussels Brussels Belgium B-1090 AZ, B-1090 Brussels, Belgium CEA, Serv Hosp Frederic Joliot, F-91401 Orsay, France CEA Orsay France F-91401 erv Hosp Frederic Joliot, F-91401 Orsay, France Univ Catholique Louvain, PET Lab, B-1348 Louvain, Belgium Univ Catholique Louvain Louvain Belgium B-1348 , B-1348 Louvain, Belgium Univ Pittsburgh, PET Facil, Pittsburgh, PA 15213 USA Univ Pittsburgh Pittsburgh PA USA 15213 T Facil, Pittsburgh, PA 15213 USA
Titolo Testata:
IEEE TRANSACTIONS ON MEDICAL IMAGING
fascicolo: 8, volume: 20, anno: 2001,
pagine: 804 - 814
SICI:
0278-0062(200108)20:8<804:CO3RW3>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; IMAGE-RECONSTRUCTION; REBINNING ALGORITHM; EM ALGORITHM; PERFORMANCE;
Keywords:
PET; rebinning; statistical reconstruction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Engineering, Computing & Technology
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Defrise, M Free Univ Brussels, Div Nucl Med, AZ, Laarbeeklaan 101, B-1090 Brussels, Belgium Free Univ Brussels Laarbeeklaan 101 Brussels Belgium B-1090 um
Citazione:
X. Liu et al., "Comparison of 3-D reconstruction with 3D-OSEM and with FORE plus OSEM for PET", IEEE MED IM, 20(8), 2001, pp. 804-814

Abstract

The combination of Fourier rebinning (FORE) and the ordered subsets expectation-maximization (OSEM), a fast statistical algorithm, appears as a promising alternative to the fully three-dimensional (3-D) iterative approach for clinical positron emission tomography (PET) data. In this paper, we evaluated the properties of FORE+OSEM and compared it with fully 3-D OSEM using both simulations and data acquired by commercial scanners. The aim is to determine to what extent the speed advantage of FORE+OSEM is paid for by a possible degradation of image quality in the case of noisy clinical PET data. A forward- and back-projection pair based on a line integral model was used in two-dimensional OSEM and 3-D OSEM (3D-OSEM) instead of a system matrix. Different variants of both approaches have been studied with simulations in terms of contrast-noise tradeoff. Two variants-FORE+OSEM with attenuation weighting (AW) [FORE+OSEM(AW)] and 3D-OSEM with attenuation-normalizationweighting (ANSP) and a shifted-Poisson (SP) model [3D-OSEM(ANSP)]-were compared with measured phantom data and patient data. Based on the results from both simulations and measured data, we conclude that: 1) both attenuation(-normalization) weighting and the SP model improve the image quality but slow down the convergence and 2) despite its approximate nature, FORE+OSEM does not show apparent image degradation compared with 3D-OSEM for data with a noise level typical of a whole-body FDG scan.

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Documento generato il 26/01/20 alle ore 16:55:46