Patent ID: 8466418
Filing Date: 2013-06-18
Classification: A61B,G01T

Abstract:
1. A gamma ray detector for detecting a gamma ray emitted from a target of measurement, comprising: an organic scintillator for detecting Compton electrons resulting from a gamma ray emitted from the target of measurement; an inorganic scintillator for detecting a Compton gamma ray; and photodetectors for detecting light generation in the corresponding scintillators, wherein the gamma ray detector performs synchronous measurement to select a pair according to a same event by using a time and energy detected by each of the photodetectors on the basis of light generation in the organic scintillator and the inorganic scintillator, and an interval of a detection window to be generated is changed between when a very short short-time window appropriate to a time width of light generation in the organic scintillator and a relatively long long-time window appropriate to a time width of light generation in the inorganic scintillator overlap each other, and when they do not overlap each other, so as to enhance measurement accuracy.