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Titolo:
COLLECTION OF SCINTILLATION LIGHT FROM SMALL BGO CRYSTALS
Autore:
CHERRY SR; SHAO YP; TORNAI MP; SIEGEL S; RICCI AR; PHELPS ME;
Indirizzi:
UNIV CALIF LOS ANGELES,SCH MED,CRUMP INST BIOL IMAGING,DEPT MOLEC & MED PHARMACOL LOS ANGELES CA 90024
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 4, volume: 42, anno: 1995,
parte:, 1
pagine: 1058 - 1063
SICI:
0018-9499(1995)42:4<1058:COSLFS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
DETECTORS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
S.R. Cherry et al., "COLLECTION OF SCINTILLATION LIGHT FROM SMALL BGO CRYSTALS", IEEE transactions on nuclear science, 42(4), 1995, pp. 1058-1063

Abstract

We propose to develop a high resolution positron emission tomography (PET) detector designed for animal imaging. The detector consists of a2-D array of small bismuth germanate (EGO) crystals coupled via optical fibers to a multi-channel photomultiplier tube (MC-PMT). Though this approach offers several advantages over the conventional BGO block design, it does require that a sufficient number of scintillation photons be transported from the crystal, down the fiber and into the PMT. In this study we use simulations and experimental data to determine howto maximize the signal reaching the PMT. This involves investigating factors such as crystal geometry, crystal surface treatment, the use of reflectors, choice of optical fiber, coupling of crystal to the optical fiber and optical fiber properties. Our results indicate that using 2 x 2 x 10 mm BGO crystals coupled to 30 cm of clad optical fiber, roughly 50 photoelectrons are produced at the PMT photocathode for a 511 keV interaction. This is sufficient to clearly visualize the photopeak and provide adequate timing resolution for PET. Based on these encouraging results, a prototype detector will now be constructed.

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Documento generato il 29/03/20 alle ore 15:25:45