Initial characterization of a BGO-photodiode detector for high resolution positron emission tomography

Conference · Tue Nov 01 04:00:00 EST 1983

OSTI ID:5273042

Derenzo, S E

Spatial resolution in positron emission tomography is currently limited by the resolution of the detectors. This work presents the initial characterization of a detector design using small bismuth germanate (BGO) crystals individually coupled to silicon photodiodes (SPDs) for crystal identification, and coupled in groups to phototubes (PMTs) for coincidence timing. A 3 mm x 3 mm x 3 mm BGO crystal coupled only to an SPD can achieve a 511 keV photopeak resolution of 8.7% FWHM at -150/sup 0/C, using a pulse peaking time of 10 ..mu..s. When two 3 mm x 3 mm x 15 mm BGO crystals are coupled individually to SPDs and also coupled to a common 14 mm diam PMT, the SPDs detect the 511 keV photopeak with a resolution of 30% FWHM at -76/sup 0/C. In coincidence with an opposing 3 mm wide BGO crystal, the SPDs are able to identify the crystal of interaction with good signal-to-noise ratio, and the detector pair resolution is 2 mm FWHM. 32 references, 7 figures, 3 tables.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5273042
• Report Number(s): LBL-16952; CONF-831015-35; ON: DE84006750
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BISMUTH COMPOUNDS
COMPUTERIZED TOMOGRAPHY
DESIGN
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
GE SEMICONDUCTOR DETECTORS
MEASURING INSTRUMENTS
PHOTODIODES
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RESOLUTION
SEMICONDUCTOR DETECTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SPATIAL RESOLUTION
TOMOGRAPHY