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Bismuth Germanate as a Potential Scintillation Detector in Positron Cameras

University of California, Los Angeles, California
Harshaw Chemical Company, Solon, Ohio

Correspondence: For reprints contact: Z. H. Cho, Laboratory of Nuclear Medicine, UCLA, 900 Veterans Ave., Los Angeles, CA 90024.

ABSTRACT

Timing and energy resolutions of the bismuth germanate (Bi₄Ge₃O₁₂) scintillation crystals were studied, with particular respect to a positron-camera application. In comparison with the NaI(Tl) system, the detection efficiency for annihilation radiation is more than triple, and coincidence detection efficiency is more than ten times as good. This paper explores the properties of the new scintillator material and their bearing on the spatial resolution and the efficiency of coincidence detection in positron cameras with stationary ring detectors.

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