Patent ID: 8212220

Claim:
A radiation detection apparatus, comprising: a first scintillator for interacting with radiation and outputting light in response thereto the first scintillator having a front surface, a rear surface and an external peripheral surface therebetween; a first photodetector adjacent to and coextensive with said rear surface of said first scintillator, for receiving and detecting light from said first scintillator and outputting a first output signal in response thereto; a second scintillator located around said peripheral surface of said first scintillator, for interacting with radiation and outputting light in response thereto, said second scintillator having a front surface and a rear surface; and a second photodetector adjacent to and coextensive with said rear surface of said second scintillator for receiving and detecting light from said second scintillator and outputting a second output signal in response thereto.