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Title: Performance study of whole-body, multislice positron computed tomograph: POSITOLOGICA-II

Abstract

A 3-detector ring, 5-slice whole-body positron CT has been developed and is being tested. The PCT, POSITOLOGICA-II, has a total of 480 BGO's (160/ring), and employs continuous rotation scan (0.5rps). By using a 15mm wide BGO, a 9.2mm FWHM spatial resolution for reconstructed image is obtained at the center of FOV. Measured phantom diameter dependence of the true count rate shows good agreement with theoretically anticipated characteristics, including maximum sensitivity at around 30cm dia. Sensitivities for 20cm dia. phantom are 28 and 38 kcps/..mu..Ci/ml for in-plane and cross-plane, respectively, including scattered coincidences. Relative system detection efficiency measured with a line source at FOV center is 96% at 15ns time window (90% at 12ns), basing on 100% efficiency in 2024ns.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Hitachi Central Research Laboratory, Kokubunji, Tokyo
OSTI Identifier:
5990943
Resource Type:
Journal Article
Journal Name:
IEEE Trans. Nucl. Sci.; (United States)
Additional Journal Information:
Journal Volume: 30:1
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 62 RADIOLOGY AND NUCLEAR MEDICINE; POSITRON COMPUTED TOMOGRAPHY; PERFORMANCE; RADIATION DETECTORS; PERFORMANCE TESTING; BISMUTH COMPOUNDS; EFFICIENCY; GERMANIUM OXIDES; IMAGES; PHANTOMS; SCATTERING; SENSITIVITY; SPATIAL RESOLUTION; CHALCOGENIDES; COMPUTERIZED TOMOGRAPHY; DIAGNOSTIC TECHNIQUES; EMISSION COMPUTED TOMOGRAPHY; GERMANIUM COMPOUNDS; MEASURING INSTRUMENTS; MOCKUP; OXIDES; OXYGEN COMPOUNDS; RESOLUTION; STRUCTURAL MODELS; TESTING; TOMOGRAPHY; 440100* - Radiation Instrumentation; 550600 - Medicine

Citation Formats

Takami, K, Murayama, H, Nohara, N, Okajima, K, Tanaka, E, Tomitani, T, Veda, K, and Yamamoto, M. Performance study of whole-body, multislice positron computed tomograph: POSITOLOGICA-II. United States: N. p., 1983. Web. doi:10.1109/TNS.1983.4332367.
Takami, K, Murayama, H, Nohara, N, Okajima, K, Tanaka, E, Tomitani, T, Veda, K, & Yamamoto, M. Performance study of whole-body, multislice positron computed tomograph: POSITOLOGICA-II. United States. https://doi.org/10.1109/TNS.1983.4332367
Takami, K, Murayama, H, Nohara, N, Okajima, K, Tanaka, E, Tomitani, T, Veda, K, and Yamamoto, M. 1983. "Performance study of whole-body, multislice positron computed tomograph: POSITOLOGICA-II". United States. https://doi.org/10.1109/TNS.1983.4332367.
@article{osti_5990943,
title = {Performance study of whole-body, multislice positron computed tomograph: POSITOLOGICA-II},
author = {Takami, K and Murayama, H and Nohara, N and Okajima, K and Tanaka, E and Tomitani, T and Veda, K and Yamamoto, M},
abstractNote = {A 3-detector ring, 5-slice whole-body positron CT has been developed and is being tested. The PCT, POSITOLOGICA-II, has a total of 480 BGO's (160/ring), and employs continuous rotation scan (0.5rps). By using a 15mm wide BGO, a 9.2mm FWHM spatial resolution for reconstructed image is obtained at the center of FOV. Measured phantom diameter dependence of the true count rate shows good agreement with theoretically anticipated characteristics, including maximum sensitivity at around 30cm dia. Sensitivities for 20cm dia. phantom are 28 and 38 kcps/..mu..Ci/ml for in-plane and cross-plane, respectively, including scattered coincidences. Relative system detection efficiency measured with a line source at FOV center is 96% at 15ns time window (90% at 12ns), basing on 100% efficiency in 2024ns.},
doi = {10.1109/TNS.1983.4332367},
url = {https://www.osti.gov/biblio/5990943}, journal = {IEEE Trans. Nucl. Sci.; (United States)},
number = ,
volume = 30:1,
place = {United States},
year = {Tue Feb 01 00:00:00 EST 1983},
month = {Tue Feb 01 00:00:00 EST 1983}
}