Patent ID: 7297955

Claim:
A positron emission tomography apparatus comprising: a bed for supporting an object to be examined; and a plurality of substrates, each including a first surface and a second surface, said first surface of a substrate facing said second surface of another substrate, and on both surfaces of said substrate, a plurality of semiconductor radiation detectors to which radiation is input and an analog integrated circuit for processing radiation detection signals output from each of said plurality of semiconductor radiation detectors, and an AD converter for converting an analog signal output from said analog integrated circuit to a digital signal for input to a digital integrated circuit on said first surface of said substrate, and the digital integrated circuit to which said digital signal is input and which is arranged faces the second surface on which no digital integrated circuit is arranged, wherein said substrates are arranged in a direction perpendicular to a longitudinal direction of said bed, and in the substrates, said plurality of semiconductor radiation detectors are arranged near said bed, and said digital integrated circuit is located far from said bed.