Initial characterization of a position-sensitive photodiode/BGO detector for PET (positron emission tomography)

Conference · Tue Nov 01 04:00:00 EST 1988

OSTI ID:6353824

Derenzo, S E; Moses, W W; Jackson, H G; Turko, B T; Cahoon, J L; Geyer, A B; Vuletich, T

We present initial results of a position-sensitive photodiode/BGO detector for high resolution, multi-layer positron emission tomography (PET). Position sensitivity is achieved by dividing the 3 mm /times/ 20 mm rectangular photosensitive area along the diagonal to form two triangular segments. Each segment was individually connected to a low-noise amplifier. The photodiodes and crystals were cooled to /minus/100/degree/C to reduce dark current and increase the BGO signal. With an amplifier peaking time of 17 ..mu..sec, the sum of the signals (511 keV photopeak) was 3200 electrons with a full width at half maximum (fwhm) of 750 electrons. The ratio of one signal to the sum determined the depth of interaction with a resolution of 11 mm fwhm. 27 refs., 7 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6353824
• Report Number(s): LBL-26529; CONF-881103-54; ON: DE89007660
• Country of Publication: United States
• Language: English

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BGO DETECTORS
CHARGED PARTICLE DETECTION
COMPUTERIZED TOMOGRAPHY
DETECTION
DIAGNOSTIC TECHNIQUES
EFFICIENCY
EMISSION COMPUTED TOMOGRAPHY
GAMMA DETECTION
IMAGE INTENSIFIERS
IMAGE SCANNERS
MEASURING INSTRUMENTS
OPTIMIZATION
POSITRON COMPUTED TOMOGRAPHY
POSITRON DETECTION
RADIATION DETECTION
RADIATION DETECTORS
RESOLUTION
SCINTILLATION COUNTERS
SCINTILLATOR-PHOTODIODE DETECTORS
SOLID SCINTILLATION DETECTORS
SPATIAL RESOLUTION
TOMOGRAPHY