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

Conference · Sun Apr 01 00:00:00 EST 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-; CODEN: IETNA; TRN: 90-031696
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA), Vol. 37:2; Conference: Institute for Electronic and Electrical Engineers (IEEE) nuclear science symposium, San Francisco, CA (USA), 15-19 Jan 1990; ISSN 0018-9499
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
62 RADIOLOGY AND NUCLEAR MEDICINE
36 MATERIALS SCIENCE
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PHYSICAL AND ANALYTICAL CHEMISTRY
BARIUM FLUORIDES
CRYSTAL LATTICES
POSITRON COMPUTED TOMOGRAPHY
TIME-OF-FLIGHT SPECTROMETERS
DESIGN
BEAM OPTICS
CALCULATION METHODS
COINCIDENCE METHODS
MONTE CARLO METHOD
OPTICAL PROPERTIES
PERFORMANCE
PHOTOCATHODES
POSITRON CAMERAS
SIMULATION
SOLID SCINTILLATION DETECTORS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CAMERAS
CATHODES
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
CRYSTAL STRUCTURE
DIAGNOSTIC TECHNIQUES
ELECTRODES
EMISSION COMPUTED TOMOGRAPHY
FLUORIDES
FLUORINE COMPOUNDS
GAMMA CAMERAS
HALIDES
HALOGEN COMPOUNDS
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
RADIATION DETECTORS
SCINTILLATION COUNTERS
SPECTROMETERS
TOMOGRAPHY
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360204 - Ceramics
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400500 - Photochemistry