Deadtime characteristics of Anger cameras.

The deadtime characterisitcs of Anger cameras are analyzed from theoretical and experimental points of view. An investigation of two Searle Radiographics cameras revealed that they had both paralyzable and nonparalyzable components, the deadtimes of which varied with analyzer window width, the energy of the gamma rays counted, and the position of the "time constant selector" switch in the A-scope module of these cameras. A mathematical model for two-component systems is presented.