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Titolo:
Attenuation correction for PET using count-limited transmission images reconstructed with median root prior
Autore:
Alenius, S; Ruotsalainen, U; Astola, J;
Indirizzi:
Tampere Univ Technol, Signal Proc Lab, FIN-33010 Tampere, Finland Tampere Univ Technol Tampere Finland FIN-33010 IN-33010 Tampere, Finland Turku PET Ctr, FIN-20520 Turku, Finland Turku PET Ctr Turku Finland FIN-20520 PET Ctr, FIN-20520 Turku, Finland
Titolo Testata:
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
fascicolo: 3, volume: 46, anno: 1999,
parte:, 2
pagine: 646 - 651
SICI:
0018-9499(199906)46:3<646:ACFPUC>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON EMISSION TOMOGRAPHY; WHOLE-BODY PET;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Alenius, S Tampere Univ Technol, Signal Proc Lab, POB 553, FIN-33010 Tampere, Finland Tampere Univ Technol POB 553 Tampere Finland FIN-33010 Finland
Citazione:
S. Alenius et al., "Attenuation correction for PET using count-limited transmission images reconstructed with median root prior", IEEE NUCL S, 46(3), 1999, pp. 646-651

Abstract

Quantitative PET studies require the computation of the attenuation correction factors (ACF) for compensating the body attenuation effect in the emission data. Short acquisition times for transmission are desired, because ofpatient comfort and movement elimination. In practice, long acquisition times are used due to the statistical noise of count-limited scans. In order to reduce the noise, the median root prior (MRP) iterative reconstruction method was used for reconstruction of short acquisition time transmission images. Using these images, the ACFs were generated for correction of emission data. The new approach allows for scan times of 2 min or less, which is desirable for quantitative whole body PET studies. The new method is object independent and robust, because no smoothing of scan data or segmentation of the image are used.

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Documento generato il 28/11/20 alle ore 18:46:39