IMAGING APPARATUS

PROBLEM TO BE SOLVED: To provide a nuclear medicine diagnostic apparatus that determines an abnormal radiation detector while imaging and is capable of eliminating an adverse effect on a generated image due to a noise signal from the radiation detector.SOLUTION: A PET apparatus comprises multiple detector units in a circumferential direction, and each of the detector units includes multiple unit substrates. Each of the unit substrates includes: multiple detectors for receiving entry of γ ray; and an analog ASIC 24 and a digital ASIC 26 that process γ-ray detection signals which are respectively output by the detectors. The analog ASIC 24 includes two slow systems with different time constants, which respectively output peak values VE1 and VE2. A noise determination part 36e of the digital ASIC 26 uses a correlation relationship between the peak values VE1 and VE2 to determine an original γ-ray detection signal or noise, a noise count part 36f counts the number of noise determinations, and a detector output signal processing control part 36g controls signal processing to an output signal from a relevant detector, on the basis of the counted number.