X-ray computed tomography apparatus, x-ray detection apparatus, and x-ray detection module

An X-ray computed tomography apparatus comprising:

• an X-ray generation circuit configured to generate X-rays;
• an X-ray detection circuit including a plurality of X-ray detection modules configured to detect X-rays generated by the X-ray generation circuit for respective energy widths;
• a counting circuit configured to count a photon originating from the X-rays for the respective energy widths based on an output from the X-ray detection circuit;
• 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.