Initial characterization of a bgo-Photodiode detector for high resolution positron emission tomography

Conference · Wed Feb 01 04:00:00 EST 1984 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6850524

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 a 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.

• Research Organization: Donner Lab. and Lawrence Berkeley Lab., Berkeley, CA 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6850524
• Report Number(s): CONF-831015-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 31:1
• Country of Publication: United States
• Language: English

Related Subjects

440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BISMUTH COMPOUNDS
BISMUTH GERMANATES
COINCIDENCE CIRCUITS
COMPUTERIZED TOMOGRAPHY
CRYSTAL COUNTERS
DESIGN
DIAGNOSTIC TECHNIQUES
ELECTRONIC CIRCUITS
ELEMENTS
EMISSION COMPUTED TOMOGRAPHY
ENERGY RANGE
GERMANATES
GERMANIUM COMPOUNDS
KEV RANGE
KEV RANGE 100-1000
MEASURING INSTRUMENTS
OXYGEN COMPOUNDS
PERFORMANCE
PHOTODIODES
PHOTOMULTIPLIERS
PHOTOTUBES
POSITRON COMPUTED TOMOGRAPHY
PULSE RISE TIME
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
SCINTILLATOR-PHOTODIODE DETECTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMIMETALS
SIGNAL-TO-NOISE RATIO
SILICON
SPATIAL RESOLUTION
TIMING PROPERTIES
TOMOGRAPHY