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Titolo:
APPLICATION OF RECONSTRUCTION-BASED SCATTER COMPENSATION TO TL-201 SPECT - IMPLEMENTATIONS FOR REDUCED RECONSTRUCTED IMAGE NOISE
Autore:
KADRMAS DJ; FREY EC; TSUI BMW;
Indirizzi:
UNIV UTAH,DEPT RADIOL,MED IMAGING RES LAB,CAMT,729 ARAPEEN DR SALT LAKE CITY UT 84108 UNIV N CAROLINA,DEPT BIOMED ENGN CHAPEL HILL NC 27599 UNIV N CAROLINA,DEPT RADIOL CHAPEL HILL NC 27599
Titolo Testata:
IEEE transactions on medical imaging
fascicolo: 3, volume: 17, anno: 1998,
pagine: 325 - 333
SICI:
0278-0062(1998)17:3<325:AORSCT>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPTON-SCATTER; MONTE-CARLO; PROJECTOR-BACKPROJECTOR; PRACTICAL METHOD; WINDOW METHOD; EMISSION; TOMOGRAPHY; QUANTIFICATION; QUANTITATION; ATTENUATION;
Keywords:
ITERATIVE RECONSTRUCTION; SCATTER COMPENSATION; SPECT; SVD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
D.J. Kadrmas et al., "APPLICATION OF RECONSTRUCTION-BASED SCATTER COMPENSATION TO TL-201 SPECT - IMPLEMENTATIONS FOR REDUCED RECONSTRUCTED IMAGE NOISE", IEEE transactions on medical imaging, 17(3), 1998, pp. 325-333

Abstract

Scatter compensation in T1-201 single photon emission computed tomography (SPECT) presents an interesting challenge because of the multipleemission energies and relatively large proportion of scattered photons, In this paper, we present a simulation study investigating reconstructed image noise levels arising from various implementations of iterative reconstruction-based scatter compensation (RBSC) in T1-201 SPECT,A two-stage analysis was used to study single and multiple energy window implementations of reconstruction-based scatter compensation, and RBSC was compared to the upper limits on performance for other approaches to handling scatter. In the first stage, singular value decomposition of the system transfer matrix was used to analyze noise levels in a manner independent of the choice of reconstruction algorithm, providing results valid across a wide range of regularizations, In the second stage, the data were reconstructed using maximum-likelihood expectation-maximization, and the noise properties of the resultant images were analyzed. The best RBSC performance was obtained using multiple energy windows, one for each emission photopeak? and RBSC outperformed theupper limit on subtraction-based compensation methods. Implementing RBSC with the correct choice of energy window acquisition scheme is a promising method for performing scatter compensation for T1-201 SPECT.

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Documento generato il 23/01/20 alle ore 13:09:23