Gamma-camera uniformity as a function of energy and count-rate
Arie Hasman, R. T. Groothedde · British Journal of Radiology · 1976
Recently there has been some discussion on the dependence of the uniformity of a gamma-camera on the energy of the incident photons and on their count-rate (Hannan and Bessent, 1974; Jansson and Parker, 1975). Since in these cases only the results of a few investigations were reported it was considered worthwhile to examine this problem more thoroughly. This paper reports the results of experiments performed with a Picker Dynacamera 2C system. The Picker Dynacamera is coupled to a PDP-8E computer through the image enhancement system (interface to the computer developed by Picker). The PDP-8E computer has a memory of 16K making possible pictures with 100×100 elements. An extended arithmetic element performs fast multiply/divide manipulations which are important for fast corrections of non-uniformity. The data are stored on a 1·6 million word disc (RK/8E from Digital Equipment).