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Titolo:
INVESTIGATION OF CRYSTAL GEOMETRIES FOR FIBER-COUPLED GAMMA-IMAGING INTRAOPERATIVE PROBES
Autore:
TORNAI MP; LEVIN CS; MACDONALD LR; HOFFMAN EJ;
Indirizzi:
UNIV CALIF LOS ANGELES,SCH MED,DIV NUCL MED & BIOPHYS,DEPT MOL & MED PHARMACOL LOS ANGELES CA 90095
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 3, volume: 44, anno: 1997,
parte:, 2
pagine: 1254 - 1261
SICI:
0018-9499(1997)44:3<1254:IOCGFF>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DETECTOR; PET; OPTIMIZATION; ARRAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
M.P. Tornai et al., "INVESTIGATION OF CRYSTAL GEOMETRIES FOR FIBER-COUPLED GAMMA-IMAGING INTRAOPERATIVE PROBES", IEEE transactions on nuclear science, 44(3), 1997, pp. 1254-1261

Abstract

CsI(Na), CsI(Tl) and NaI(Tl) scintillators coupled through optical fibers were investigated with simulations and measurements to evaluate their potential as gamma imaging intraoperative probes. Three coupling methods were employed: discrete crystals coupled one-to-one with the fibers; discrete crystals coupled through a light diffuser to an unmatched fiber array; and continuous crystals coupled directly to the fiberoptic array. The discrete crystals were 4x4 element arrays ranging insize from 1x1x2.5 mm(3) to 2x2x6 mm(3). CsI(Na) produced the best pulse height and single crystal energy resolution (44% at 140 keV) when coupled through fibers to the photodetector. All elements of the arrayswere completely resolved, indicating that the intrinsic spatial resolution will be determined by the crystal size. The spatial resolution for the 12.5 mm phi x 3.5 mm continuous crystals was similar to 1.33 mmFWHM. Preliminary imaging measurements faithfully reproduced the activity distributions and compared favorably with simulations.

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Documento generato il 01/04/20 alle ore 09:35:23