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Titolo:
A theoretical study of the contrast recovery and variance of MAP reconstructions from PET data
Autore:
Qi, JY; Leahy, RM;
Indirizzi:
Univ So Calif, Inst Signal & Image Proc, Los Angeles, CA 90089 USA Univ SoCalif Los Angeles CA USA 90089 ge Proc, Los Angeles, CA 90089 USA
Titolo Testata:
IEEE TRANSACTIONS ON MEDICAL IMAGING
fascicolo: 4, volume: 18, anno: 1999,
pagine: 293 - 305
SICI:
0278-0062(199904)18:4<293:ATSOTC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
BAYESIAN IMAGE-RECONSTRUCTION; PENALIZED MAXIMUM-LIKELIHOOD; EMISSION TOMOGRAPHY; EM ALGORITHM; COMPUTED-TOMOGRAPHY; NOISE PROPERTIES; QUANTITATION; TRANSMISSION; RESOLUTION; TRADEOFFS;
Keywords:
hyperparameter estimation; image resolution; MAP estimation; variance analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Engineering, Computing & Technology
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Qi, JY Univ So Calif, Inst Signal & Image Proc, Los Angeles, CA 90089 USA Univ So Calif Los Angeles CA USA 90089 , Los Angeles, CA 90089 USA
Citazione:
J.Y. Qi e R.M. Leahy, "A theoretical study of the contrast recovery and variance of MAP reconstructions from PET data", IEEE MED IM, 18(4), 1999, pp. 293-305

Abstract

We examine the spatial resolution and variance properties of PET images reconstructed using maximum a posteriori (MAP) or penalized-likelihood methods. Resolution is characterized by the contrast recovery coefficient (CRC) of the local impulse response. Simplified approximate expressions are derived for the local impulse response CRC's and variances for each voxel, Using these results we propose a practical scheme for selecting spatially variantsmoothing parameters to optimize lesion detectability through maximizationof the local CRC-to-noise ratio in the reconstructed image.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 10:23:50