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Absolute quantitation of radioactivity using the buildup factor

Journal Article · · Med. Phys.; (United States)
DOI:https://doi.org/10.1118/1.595486· OSTI ID:6580289
A quantitation scheme for absolute activity measurements with the gamma camera is presented. The technique relies on the use of a set of derived buildup factors to correct for the effects of scatter. Only anterior and posterior view count rates of the region of interest are required for quantitation. The buildup factors are reported for various depths for two different source sizes using the parallel-hole collimator with a specific window setting. Phantom studies have shown that the method provides less than 5% error for activity determinations at all investigated depths.
Research Organization:
Department of Nuclear Medicine, Temple University Hospital, Philadelphia, Pennsylvania 19140
OSTI ID:
6580289
Journal Information:
Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 11:2; ISSN MPHYA
Country of Publication:
United States
Language:
English

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