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:
-
- Univ. of California, Los Angeles, CA (United States). Dept. of Pharmacology
- 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}
}