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Titolo:
POSITIONING AND ENERGY RESPONSE OF PET BLOCK DETECTORS WITH DIFFERENTLIGHT SHARING SCHEMES
Autore:
TORNAI MP; GERMANO G; HOFFMAN EJ;
Indirizzi:
UCLA,SCH MED,DIV NUCL MED & BIOPHYS,STRUCT BIOL & MOLEC MED LAB LOS ANGELES CA 90024 CEDARS SINAI MED CTR LOS ANGELES CA 90048 UCLA,SCH MED,DEPT PHARMACOL LOS ANGELES CA 90048
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 4, volume: 41, anno: 1994,
parte:, 1
pagine: 1458 - 1463
SICI:
0018-9499(1994)41:4<1458:PAEROP>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-RESOLUTION PET; BGO DETECTOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
8
Recensione:
Indirizzi per estratti:
Citazione:
M.P. Tornai et al., "POSITIONING AND ENERGY RESPONSE OF PET BLOCK DETECTORS WITH DIFFERENTLIGHT SHARING SCHEMES", IEEE transactions on nuclear science, 41(4), 1994, pp. 1458-1463

Abstract

Two state-of-the-art modular PET block detectors using either discrete or pseudo-discrete BGO crystals coupled to two dual PMTs, utilizing different light sharing schemes, were evaluated. Both detectors were approximately 30 mm thick, while each element of the GE 6 x 6 block detector was 4 mm x 8.4 mm, and each element of the CTI 8 x 7 block detector was 2.8 mm x 5.8 mm. In addition to measurements with gamma sources, the detectors were also irradiated with a Sr/Y-90 beta source to evaluate the performance of the block detectors without inter-element scatter of annihilation photons. The best and worst energy resolutions of individual elements at 511 keV were 21.8% and 44.2% for the GE detector, and 22.7% and 42.5% for the CTI detector. The peak to valley ratios in the detector identification ratio histograms were generally better than 3 to 1. Measurements with beta sources indicate that light sharing in both detectors is a large component of event mispositioning along with inter-detector scatter of the annihilation photons.

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Documento generato il 05/04/20 alle ore 09:31:45