Patent ID: 9693745
Date: 2017-07-04
CPC Classifications: A61B,H04N

Claim:
1. An X-ray computed tomography apparatus comprising: an X-ray tube configured to generate X-rays; an X-ray detector including a plurality of X-ray detection modules configured to detect X-rays generated by the X-ray tube for respective energy widths; a counting circuit configured to count photons originating from the X-rays for the respective energy widths based on an output from the X-ray detector; and a reconstruction circuit configured to reconstruct a medical image based on an output from the counting circuit, wherein each of the X-ray detection modules includes: a collimator configured to collimate the X-rays; a diffraction cell arranged on a rear surface side of the collimator and configured to diffract the X-ray at an angle corresponding to an energy of the X-ray; and a plurality of X-ray detector cells arranged in a predetermined distance away from a rear surface of the collimator, and detecting the diffracted X-ray; and wherein the counting circuit includes: a plurality of counters respectively connected to the plurality of X-ray detector cells and configured to count the photons; and an adder configured to add a plurality of count values outputted from the plurality of counters, which respectively correspond to the X-ray detector cells located in a same radius centered on a position facing an aperture center of the collimator in each of the X-ray detection modules.