[Quality control of gamma cameras]

The authors present a detailed description of the parameters of gamma-chambers that are necessary to measure in order to assess the quality of the device as a whole. The main concepts have been laid down: resolution, spatial distortion, irregularity of the field of vision of a gamma-chamber, idle time of the system, sensitivity, etc. Methods for the evaluation of the main characteristic of gamma-chambers are considered. A necessity to organize the checking of gamma-chambers in hospitals and other health care facilities and the making up of a common system of assessment are discussed.