Acquisition method of gamma ray generation position of scattering coincidence counting in PET device and pet apparatus

摘要

To provide a PET device capable of photographing a high definition image in a short period of time and a method for acquiring a gamma ray generation position of scattering coincidence counting in the PET device.SOLUTION: A PET device includes a plurality of detectors having a detector signal processing part, and a data processing circuit for acquiring a gamma ray generation position. The detector signal processing part includes a Compton cone estimation part for estimating incident directions of gamma rays detected by a pair of detectors as first and second Compton cones. A data processing part includes: a coincidence counting acquisition part for acquiring coincidence counting information of a gamma ray; a scattering plane estimation part for estimating a scattering plane of the gamma ray; a first intersection determination part for determining the presence/absence of a first intersection at which planes of the first and second Compton cones overlap each other; a second intersection determination part for determining the presence/absence of a second intersection at which the first intersection overlaps the scattering plane; and a gama ray generation position acquisition part for acquiring a gamma ray generation position from a measurement line of scattering coincidence counting and TOF information of the gamma ray.SELECTED DRAWING: Figure 4