RT Journal Article SR Electronic T1 Using the Gamma Camera for Counting Contamination Survey Wipes JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 186 OP 188 VO 17 IS 4 A1 Frey, G. Donald YR 1989 UL http://tech.snmjournals.org/content/17/4/186.abstract AB The gamma camera can be used as a highly sensitive detector for low-level counting. Minimum detectable activities (MDA) of less than 200 dpm for 99mTc can be achieved using a gamma camera with a collimator. If a nuclear medicine computer is also used, MDAs of less than 100 dpm can be obtained without difficulty.