Monte Carlo simulation of BaF sub 2 detectors used in time-of-flight positron emission tomography

Conference · Sun Apr 01 04:00:00 EDT 1990 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)

OSTI ID:6871894

Bice, A N; Lewellen, T K; Miyaoka, R S; Harrison, R L; Haynor, D R; Pollard, K R; Anson, C P; Gillispie, S B ^[1]

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1. Univ. of Washington Medical Center, Seattle, WA (US)

To better understand the performance of the SP3000 time-of-flit PET machine the authors have performed Monte Carlo calculations of photon interactions in a BaF{sub 2} detector module and calculations of crystal optics for BaF{sub 2} UV scintillation light. Evaluated were photon detection sensitivities, the amount of photon spillover, crystal crosstalk, inter-ring miscodes, and true-to-random coincidence ratios as a function of the lower level energy discriminator setting and crystal/photomultiplier tube energy resolution. UV light collection efficiencies for the timing tube and decode tube also were calculated assuming different crystal geometries, reflective materials and reflectances. For a typical SP3000 detector module the detection efficiency for single 511 keV photons varied between 20--60% depending on the angle of incidence. Crosstalk in the same ring was {approximately} 3% and crosstalk between adjacent rings was {approximately} 1%. The optical calculations indicate that the fast light component of BaF{sub 2} produced less than 35 photoelectrons at the timing tube photocathode for a 511 keV photopeak event and less than half this number of photoelectrons at the decode tube.

• OSTI ID: 6871894
• Report Number(s): CONF-900143--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) Journal Volume: 37:2
• Country of Publication: United States
• Language: English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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62 RADIOLOGY AND NUCLEAR MEDICINE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM FLUORIDES
BEAM OPTICS
CALCULATION METHODS
CAMERAS
CATHODES
COINCIDENCE METHODS
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DESIGN
DIAGNOSTIC TECHNIQUES
ELECTRODES
EMISSION COMPUTED TOMOGRAPHY
FLUORIDES
FLUORINE COMPOUNDS
GAMMA CAMERAS
HALIDES
HALOGEN COMPOUNDS
MEASURING INSTRUMENTS
MONTE CARLO METHOD
OPTICAL PROPERTIES
PERFORMANCE
PHOTOCATHODES
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POSITRON CAMERAS
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
SCINTILLATION COUNTERS
SIMULATION
SOLID SCINTILLATION DETECTORS
SPECTROMETERS
TIME-OF-FLIGHT SPECTROMETERS
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