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Title: Positioning and energy response of PET block detectors with different light sharing schemes

Abstract

Two state-of-the-art modular PET block detectors using either discrete or pseudo-discrete BGO crystals coupled to two dual PMTs, utilizing different light sharing schemes, were evaluated. Both detectors were approximately 30 mm thick, which each element of the GE 6 x 6 block detector was 4 mm x 8.4 mm, and each element of the CTI 8 x 7 block detector was 2.8 mm x 5.8 mm. In addition to measurements with gamma sources, the detectors were also irradiated with a Sr/Y-90 beta source to evaluate the performance of the block detectors without inter-element scatter of annihilation photons. The best and worst energy resolutions of individual elements at 511 keV were 21.8% and 44.2% for the GE detector, and 22.7% and 42.5% for the CTI detector. The peak to valley ratios in the detector identification ratio histograms were generally better than 3 to 1. Measurements with beta sources indicate that light sharing in both detectors is a large component of even mispositioning along with inter-detector scatter of the annihilation photons.

Authors:
;  [1];  [2]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Pharmacology
  2. Cedars-Sinai Medical Center, Los Angeles, CA (United States)
Publication Date:
OSTI Identifier:
6838586
Report Number(s):
CONF-931051-
Journal ID: ISSN 0018-9499; CODEN: IETNAE
DOE Contract Number:  
FC03-87ER60615
Resource Type:
Conference
Journal Name:
IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 41:4PT1; Conference: NSS-MIC '93: nuclear science symposium and medical imaging conference, San Francisco, CA (United States), 30 Oct - 6 Nov 1993; Journal ID: ISSN 0018-9499
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BGO DETECTORS; PERFORMANCE TESTING; POSITRON CAMERAS; POSITRON COMPUTED TOMOGRAPHY; SPATIAL RESOLUTION; COMPARATIVE EVALUATIONS; OPTIMIZATION; CAMERAS; COMPUTERIZED TOMOGRAPHY; DIAGNOSTIC TECHNIQUES; EMISSION COMPUTED TOMOGRAPHY; EVALUATION; GAMMA CAMERAS; MEASURING INSTRUMENTS; RADIATION DETECTORS; RESOLUTION; SCINTILLATION COUNTERS; SOLID SCINTILLATION DETECTORS; TESTING; TOMOGRAPHY; 550601* - Medicine- Unsealed Radionuclides in Diagnostics

Citation Formats

Tornai, M P, Hoffman, E J, and Germano, G. Positioning and energy response of PET block detectors with different light sharing schemes. United States: N. p., 1994. Web.
Tornai, M P, Hoffman, E J, & Germano, G. Positioning and energy response of PET block detectors with different light sharing schemes. United States.
Tornai, M P, Hoffman, E J, and Germano, G. 1994. "Positioning and energy response of PET block detectors with different light sharing schemes". United States.
@article{osti_6838586,
title = {Positioning and energy response of PET block detectors with different light sharing schemes},
author = {Tornai, M P and Hoffman, E J and Germano, G},
abstractNote = {Two state-of-the-art modular PET block detectors using either discrete or pseudo-discrete BGO crystals coupled to two dual PMTs, utilizing different light sharing schemes, were evaluated. Both detectors were approximately 30 mm thick, which each element of the GE 6 x 6 block detector was 4 mm x 8.4 mm, and each element of the CTI 8 x 7 block detector was 2.8 mm x 5.8 mm. In addition to measurements with gamma sources, the detectors were also irradiated with a Sr/Y-90 beta source to evaluate the performance of the block detectors without inter-element scatter of annihilation photons. The best and worst energy resolutions of individual elements at 511 keV were 21.8% and 44.2% for the GE detector, and 22.7% and 42.5% for the CTI detector. The peak to valley ratios in the detector identification ratio histograms were generally better than 3 to 1. Measurements with beta sources indicate that light sharing in both detectors is a large component of even mispositioning along with inter-detector scatter of the annihilation photons.},
doi = {},
url = {https://www.osti.gov/biblio/6838586}, journal = {IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0018-9499},
number = ,
volume = 41:4PT1,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 1994},
month = {Mon Aug 01 00:00:00 EDT 1994}
}

Conference:
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