Performance of a PET detector module utilizing an array of silicon photodiodes to identify the crystal of interaction

Conference · Sun Nov 01 00:00:00 EST 1992

OSTI ID:6879193

Moses, W W; Derenzo, S E ^[1]; Nutt, R; Digby, W M; Williams, C W; Andreaco, M ^[2]

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1. Lawrence Berkeley Lab., CA (United States)
2. CTI, Inc., Knoxville, TN (United States)

We present initial performance results for a new multi-layer PET detector module consisting of an array of 3 mm square by 30 mm deep BGO crystals coupled on one end to a single photomultiplier tube and on the opposite end to an array of 3 mm square silicon photodiodes. The photomultiplier tube provides an accurate timing pulse and energy discrimination for the all the crystals in the module, while the silicon photodiodes identify the crystal of interaction. When a single BGO crystal at +25[degree]C is excited with 511 key photons, we measure a photodiode signal centered at 700 electrons (e[sup [minus]]) with noise of 375 e[sup [minus]] fwhm. When a four crystal / photodiode module is excited with a collimated line source of 511 key photons, the crystal of interaction is correctly identified 82% of the time. The misidentification rate can be greatly reduced and an 8[times]8 crystal / photodiode module constructed by using thicker depletion layer photodiodes or cooling to 0[degrees]C.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE; DOHHS; USDOE, Washington, DC (United States); Department of Health and Human Services, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6879193
• Report Number(s): LBL-33042; CONF-921005-27; ON: DE93007715; CNN: P01-HL25840; R01-CA48002; R01-NS29655
• Resource Relation: Conference: Institute of Electrical and Electronic Engineers (IEEE) nuclear science symposium and medical imaging conference, Orlando, FL (United States), 26-31 Oct 1992
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BGO DETECTORS
PERFORMANCE
BISMUTH GERMANATES
COMPUTERIZED SIMULATION
CRYSTALS
FUNCTIONAL MODELS
MONTE CARLO METHOD
PHOTODIODES
PHOTOMULTIPLIERS
POSITRON COMPUTED TOMOGRAPHY
SILICON
BISMUTH COMPOUNDS
CALCULATION METHODS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
ELEMENTS
EMISSION COMPUTED TOMOGRAPHY
GERMANATES
GERMANIUM COMPOUNDS
MEASURING INSTRUMENTS
OXYGEN COMPOUNDS
PHOTOTUBES
RADIATION DETECTORS
SCINTILLATION COUNTERS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMIMETALS
SIMULATION
SOLID SCINTILLATION DETECTORS
TOMOGRAPHY
550602* - Medicine- External Radiation in Diagnostics- (1980-)
440103 - Radiation Instrumentation- Nuclear Spectroscopic Instrumentation