Comparing the Performance of Two Gamma Cameras

The performance of most—if not all—gamma cameras on the market is satisfactory for static imag ing at low count rates. CT scanning, however, will reduce the need for such static studies, with bone scintigraphy as one of the few possible exceptions. In the future the main load will lie on dynamic func tional studies. Many such procedures—in particu lar radiospirometry, radiocardiography and regional cerebral blood flow—demand such high count rates that the capabilities of the cameras become critical, and differences between their performances become evident (1—4).Currently, therefore, the performance at high count rates must be an essential criterion for the choice of a gamma camera. The main objective of this study, accordingly, is to devise relevant methods of testing such perform