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-; TRN: 85-026120
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. NS-32:1; Conference: Nuclear science symposium, Orlando, FL, USA, 31 Oct 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GADOLINIUM COMPOUNDS
MATERIALS TESTING
MERCURY IODIDES
SILICATES
SOLID SCINTILLATION DETECTORS
COMPARATIVE EVALUATIONS
BISMUTH GERMANATES
COINCIDENCE METHODS
EMISSION SPECTRA
ENERGY RESOLUTION
GAMMA DETECTION
HGI2 SEMICONDUCTOR DETECTORS
HYBRIDIZATION
PHOTODETECTORS
PHOTOMULTIPLIERS
POSITRON COMPUTED TOMOGRAPHY
BISMUTH COMPOUNDS
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
DETECTION
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
GERMANATES
GERMANIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IODIDES
IODINE COMPOUNDS
MEASURING INSTRUMENTS
MERCURY COMPOUNDS
MERCURY HALIDES
OXYGEN COMPOUNDS
PHOTOTUBES
RADIATION DETECTION
RADIATION DETECTORS
RARE EARTH COMPOUNDS
RESOLUTION
SCINTILLATION COUNTERS
SEMICONDUCTOR DETECTORS
SILICON COMPOUNDS
SPECTRA
TESTING
TOMOGRAPHY
440103* - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation
645101 - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties