PET DEVICE AND METHOD FOR RECONSTITUTING IMAGE OF THE SAME

摘要

Detector rings each obtained by arranging detectors in a ring form or polygonally are disposed with an open space in the direction of the body axis. Some or all the pairs of the detectors combining the detector rings arranged across the open space perform simultaneous counting measurement to reconstitute a three dimensional image so as to make the image of the open space between the detector rings as a tomogram. This secures the open space while suppressing deterioration of an image quality to enable easily accessing a patient in the middle of taking a PET examination from outside of a gantry and to enable irradiation with particle beams for treatment of cancer and CT scan.