Hybrid mercuric iodide (HgI/sub 2/): gadolinium orthosilicate (GSO) detector for PET
Gadolinium orthosilicate (GSO), a high density (6.71 g/cm/sup 3/), high effective Z (59) scintillation detector with faster decay time (60 ns) and higher light yield than bismuth germanate (BGO), was evaluated as a replacement for BGO for a hybrid detection system for high resolution Positron Emission Tomography (PET). The detection system consists of multiple GSO detectors attached to a single photomultiplier tube (PMT) and a HgI/sub 2/ photodetector attached to each GSO crystal. The PMT signal provides coincidence timing and energy discrimination and the photodetector signal identifies the crystal of interaction. GSO light yield was 1.7 times that of BGO with energy resolution consistent with improved photon statistics (17.8 to 13.8% FWHM). Resolution of GSO coupled to a HgI/sub 2/ photodetector was 13.6% FWHM. Coincidence timing was 2.3 ns FWHM. Timing between PMT and HgI/sub 2/ was 136 ns FWHM.
- Research Organization:
- UCLA School of Medicine, Los Angeles, CA
- OSTI ID:
- 5083714
- Report Number(s):
- CONF-841007-
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. NS-32:1; ISSN IETNA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
645101 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BISMUTH COMPOUNDS
BISMUTH GERMANATES
COINCIDENCE METHODS
COMPARATIVE EVALUATIONS
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
DETECTION
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
EMISSION SPECTRA
ENERGY RESOLUTION
GADOLINIUM COMPOUNDS
GAMMA DETECTION
GERMANATES
GERMANIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HGI2 SEMICONDUCTOR DETECTORS
HYBRIDIZATION
IODIDES
IODINE COMPOUNDS
MATERIALS TESTING
MEASURING INSTRUMENTS
MERCURY COMPOUNDS
MERCURY HALIDES
MERCURY IODIDES
OXYGEN COMPOUNDS
PHOTODETECTORS
PHOTOMULTIPLIERS
PHOTOTUBES
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTION
RADIATION DETECTORS
RARE EARTH COMPOUNDS
RESOLUTION
SCINTILLATION COUNTERS
SEMICONDUCTOR DETECTORS
SILICATES
SILICON COMPOUNDS
SOLID SCINTILLATION DETECTORS
SPECTRA
TESTING
TOMOGRAPHY