A 254-Detector System for Measuring Regional Cerebral Blood Flow

A dynamic gamma camera has been constructed based on 254 scintillation crystals, each crystal being coupled via a light guide to one photo-multiplier. The system allows the recording of 2 × 106 counts/sec with a counting loss of less than 2%, a performance which is approximately one order of magnitude better than that of other comparable systems, such as the single crystal camera (Anger), the image intensifier camera, and even the multicrystal coincidence counting camera (Bender and Blau).