X-ray computed tomography apparatus and radiation detector

摘要

According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a detector, a first DAS, and a second DAS. The radiation detector includes a plurality of detection elements. Each detection element repeatedly detects X-rays generated by the X-ray tube and transmitted through a subject and repeatedly generates an electrical signal corresponding to the energy of the repeatedly detected X-rays. The first DAS acquires the electrical signal detected by part of the imaging region of each detection element in the integral mode. The second DAS acquires the electrical signal detected by the other part of the imaging region of each detection element in the photon count type mode.

主权项

1. An X-ray computed tomography apparatus comprising:
an X-ray tube configured to generate X-rays; a detector including a plurality of detection elements each configured to detect X-rays generated by the X-ray tube and transmitted through a subject and generate an electrical signal corresponding to an energy of the detected X-rays; a first acquisition unit configured to acquire the electrical signal detected by part of an imaging region of each of the plurality of detection elements in an integral mode; and a second acquisition unit configured to acquire the electrical signal detected by the other part of the imaging region of each of the plurality of detection elements in a photon count type mode, wherein the detector comprises:
a scintillator configured to absorb an energy of X-rays from the X-ray tube and generate scintillation corresponding to the energy of the absorbed X-rays;a first light receiving element provided in a first section on one surface of the scintillator and configured to generate the electrical signal corresponding to the generated scintillation and supply the electrical signal to the first acquisition unit, anda second light receiving element provided in a second section other than the first section on the one surface, and the second section not overlapping with the first section in a direction perpendicular to the one surface of the scintillator, and configured to generate the electrical signal corresponding to the generated scintillation and supply the electrical signal to the second acquisition unit, andthe first light receiving element is connected to the first acquisition unit, and the second light receiving element is connected to the second acquisition unit.