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Titolo:
RECONSTRUCTION METHODS FOR QUANTITATIVE BRAIN SPECT
Autore:
TSUI BMW; ZHAO XD; CAO ZJ; FREY EC;
Indirizzi:
UNIV N CAROLINA,DEPT BIOMED ENGN CHAPEL HILL NC 27599 UNIV N CAROLINA,DEPT RADIOL CHAPEL HILL NC 27599
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 2, volume: 40, anno: 1993,
pagine: 214 - 220
SICI:
0018-9499(1993)40:2<214:RMFQBS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONTE-CARLO; BAYESIAN RECONSTRUCTION; ATTENUATION CORRECTION; IMAGE-RECONSTRUCTION; EMISSION TOMOGRAPHY; COMPUTED-TOMOGRAPHY; EM ALGORITHM; RESTORATION; SCATTER; PET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
B.M.W. Tsui et al., "RECONSTRUCTION METHODS FOR QUANTITATIVE BRAIN SPECT", IEEE transactions on nuclear science, 40(2), 1993, pp. 214-220

Abstract

We have studied reconstruction methods currently available for use inquantitative brain SPECT imaging. The conventional reconstruction methods are based on the filtered backprojection algorithm. Assuming uniform attenuation, the Chang algorithm is effective in attenuation compensation. The collimator response can be compensated for by restorationfilter with an average collimator response function. Scatter compensation can be achieved by the dual window subtraction method or by incorporating an average scatter response function in the restoration filter. The dual window subtraction method is an approximate but efficient means of providing scatter compensated projection data. Iteration reconstruction method can be applied to these data for addition compensation for attenuation and the spatially variant collimator response. The latter is accomplished by incorporating the exact model of attenuationand detector response function in the projector/backprojector of the iterative algorithm. A three-dimensional brain phantom was used in theevaluation study. Projection data were collected into the photopeak and a lower scatter energy windows for scatter compensation. The imagesobtained from various reconstruction methods were compared for quantitative accuracy with respect to the known 3D phantom activity distribution.

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Documento generato il 25/01/20 alle ore 09:21:26