Nuclear medicine diagnostic apparatus and positron emission tomography apparatus

A to prevent the influence of the noise of the γ ray detection signal generated by the voltage regulator is to shorten the inspection time. A positron emission tomography apparatus, arranging a plurality of detector units 2 around the bed. Detector unit 2, the detector 21 is placed a plurality of bonded substrate 20 including analog ASIC and a digital ASIC, and a voltage regulator 63 in the housing 30. A partition plate 50 which is installed in the housing 30 is a region within the enclosure 30, the first region 44 and the voltage regulator 63, is separated into a second region 45 which is arranged coupled substrate 20 is disposed. The partition plate 50, as the noise generated in the voltage regulator 63 does not affect the γ-ray detection signal output from the detector 21, blocking the noise. .FIELD 5