A slanting light-guide analog decoding high resolution detector for positron emission tomography camera

Conference · Sun Feb 01 04:00:00 EST 1987 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6700225

Wong, W H; Jing, M; Bendriem, B; Hartz, R; Mullani, N; Gould, K L; Michel, C

Current high resolution PET cameras require the scintillation crystals to be much narrower than the smallest available photomultipliers. In addition, the large number of photomultiplier channels constitutes the major component cost in the camera. Recent new designs use the Anger camera type of analog decoding method to obtain higher resolution and lower cost by using the relatively large photomultipliers. An alternative approach to improve the resolution and cost factors has been proposed, with a system of slanting light-guides between the scintillators and the photomultipliers. In the Anger camera schemes, the scintillation light is distributed to several neighboring photomultipliers which then determine the scintillation location. In the slanting light-guide design, the scintillation is metered and channeled to only two photomultipliers for the decision making. This paper presents the feasibility and performance achievable with the slanting light-guide detectors. With a crystal/photomultiplier ratio of 6/1, the intrinsic resolution was found to be 4.0 mm using the first non-optimized prototype light-guides on BGO crystals. The axial resolution will be about 5-6 mm.

• Research Organization: The Univ. of Texas Medical School at Houston, 6431 Fannin Street, Houston, TX 77030
• OSTI ID: 6700225
• Report Number(s): CONF-861007-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-34:1
• Country of Publication: United States
• Language: English

Related Subjects

440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ANALOG SYSTEMS
BGO DETECTORS
CAMERAS
COMPUTERIZED TOMOGRAPHY
COST
CRYSTALS
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
FEASIBILITY STUDIES
FIBERS
GAMMA CAMERAS
INCLINATION
MEASURING INSTRUMENTS
OPTICAL FIBERS
PERFORMANCE
PHOTOMULTIPLIERS
PHOTOTUBES
POSITRON CAMERAS
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
SCINTILLATIONS
SOLID SCINTILLATION DETECTORS
TOMOGRAPHY