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Semiconductor Camera for Detection of Small Tumors

University of California, Los Angeles, California

Correspondence: For reprints contact: A. E. Profio, Dept. of Chemical and Nuclear Engineering, University of California, Santa Barbara, Calif. 93106.

ABSTRACT

Early detection of small tumors (approximately 3 mm) with only a moderate uptake ratio is often difficult because of poor statistics and a small signal-to-background ratio. The detection capability of a germanium semiconductor camera is analyzed to show that a very large number of counts is required even when the spatial resolution is matched to the size of the tumor. A potential enhancement of statistics using the tissue-scattered gamma rays is discussed based on the superior energy resolution of the semiconductor.