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Titolo:
HIGH-RESOLUTION CSI(TL) SI-PIN DETECTOR DEVELOPMENT FOR BREAST IMAGING/
Autore:
PATT BE; IWANCZYK JS; TULL CR; WANG NW; TORNAI MP; HOFFMAN EJ;
Indirizzi:
PHOTON IMAGING INC,19355 BUSINESS CTR DR,SUITE 8 NORTHRIDGE CA 91324 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB BERKELEY CA 94720 UCLA,SCH MED,DEPT MOL & MED PHARMACOL,DIV NUCL MED & BIOPHYS LOS ANGELES CA 90095
Titolo Testata:
IEEE transactions on nuclear science
fascicolo: 4, volume: 45, anno: 1998,
parte:, 2
pagine: 2126 - 2131
SICI:
0018-9499(1998)45:4<2126:HCSDDF>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
TC-99M SESTAMIBI; PRONE SCINTIMAMMOGRAPHY; CARCINOMA; CANCER; MIBI; DIAGNOSIS; ARRAYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
B.E. Patt et al., "HIGH-RESOLUTION CSI(TL) SI-PIN DETECTOR DEVELOPMENT FOR BREAST IMAGING/", IEEE transactions on nuclear science, 45(4), 1998, pp. 2126-2131

Abstract

High resolution multi-element (8x8) imaging arrays with collimators, size matched to discrete CsI(TI) scintillator arrays and Si-PIN photodetector arrays (PDA's) were developed as prototypes for larger arrays far breast imaging. Photodetector pixels were each 1.5 x 1.5 mm(2) with 0.25 mm gaps. A 16-element quadrant of the detector was evaluated with a segmented CsI(TI) scintillator array (1.5x1.5x6 mm(3) segments with 0.25 mm septa) coupled to the silicon array. The scintillator thickness of 6 mm corresponds to > 85% total gamma efficiency at 140 keV. Pixel energy resolution of < 8% FWHM was obtained for Tc-99m (140 keV). Electronic noise was 41 e(-) RMS corresponding to a 3% FWHM contribution to the 140 keV photopeak Detection efficiency uniformity (+/- sigma%) measured with a Tc-99m flood source was 4.3% for a similar to 10% energy photopeak window. Spatial resolution was 1.53 mm FWHM and pitchwas 1.75 mm as measured from the Co-57 (122 keV) line spread function. Signal to background was 34 and contrast ([max-min]/[max+min]) was 0.94. The energy resolution and spatial characteristics of the new imaging detector exceed those of other scintillator based imaging detectors. A camera based on this technology will allow: 1) Improved Compton scatter rejection; 2) Detector positioning in close proximity to the breast to increase signal to noise; 3) Improved spatial resolution; and 4) Improved efficiency compared to high resolution collimated gamma cameras for the anticipated compressed breast geometries.

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Documento generato il 30/03/20 alle ore 13:35:10