Coincidence counting method of gamma ray and nuclear medicine diagnostic apparatus

摘要

A gamma-ray signal processing section 60' determines a detection time of a gamma ray based on a alpha-ray detection signal outputted from a semiconductor radiation detector for detecting the gamma ray, and determines the energy of the gamma ray. Then, a time correction circuit 70 obtains, based on the energy of the gamma ray, a detection value of the detection time that corresponds to the energy of the gamma ray from a time correction table indicating the relationship between the energy of the gamma ray and the correction value of the detection time of the gamma ray, and corrects the detection time according to the obtained correction value of the detection time. Coincidence counting is performed on the gamma ray in a coincidence counting circuit 80 based on the corrected detection time.