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

Journal Article · Tue Feb 01 04:00:00 EST 1983 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/TNS.1983.4332367· OSTI ID:5990943

Takami, K; Murayama, H; Nohara, N; Okajima, K; Tanaka, E; Tomitani, T; Veda, K; Yamamoto, M

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.

• Research Organization: Hitachi Central Research Laboratory, Kokubunji, Tokyo
• OSTI ID: 5990943
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. 30:1; ISSN IETNA
• Country of Publication: United States
• Language: English

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BISMUTH COMPOUNDS
CHALCOGENIDES
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
EFFICIENCY
EMISSION COMPUTED TOMOGRAPHY
GERMANIUM COMPOUNDS
GERMANIUM OXIDES
IMAGES
MEASURING INSTRUMENTS
MOCKUP
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PERFORMANCE TESTING
PHANTOMS
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RESOLUTION
SCATTERING
SENSITIVITY
SPATIAL RESOLUTION
STRUCTURAL MODELS
TESTING
TOMOGRAPHY