X-ray computed tomography apparatus and photon counting ct apparatus

An X-ray computed tomography apparatus comprising:

• an X-ray source ring including a plurality of X-ray sources arrayed circumferentially, the plurality of X-ray sources individually generating X-rays;
• an X-ray detector configured to detect X-rays from the X-ray source ring;
• a collimator support mechanism provided on an inner circumferential side of the X-ray detection ring and configured to support at least one post-collimator rotatable about a rotation axis;
• a support mechanism driver configured to drive the collimator support mechanism;
• a controller configured to control the support mechanism driver to rotate the at least one post-collimator about the rotation axis in synchronism with generation of X-rays from the plurality of X-ray sources;
• a data collection unit configured to collect digital data corresponding to an intensity of the detected X-rays;
• and
• a reconstruction unit configured to reconstruct a CT image based on the digital data.

A photon counting CT apparatus comprising:

• an X-ray source ring including a plurality of X-ray sources arrayed circumferentially, the plurality of X-ray sources individually generating X-rays;
• an X-ray detector configured to detect X-rays from the X-ray source ring;
• a filter support mechanism configured to support at least one wedge filter rotatable about a rotation axis, the at least one wedge filter provided on an inner circumferential side of the X-ray source ring;
• a filter driver configured to drive the filter support mechanism;
• a controller configured to control the filter driver so as to rotate the at least one wedge filter about the rotation axis in synchronism with generation of X-rays from the plurality of X-ray sources;
• a counting unit configured to count the number of detected X-ray photons;
• and
• a reconstruction unit configured to reconstruct a photon counting CT image based on the number of photons.

An photon counting CT apparatus comprising:

• an X-ray source ring including a plurality of X-ray sources arrayed circumferentially, the plurality of X-ray sources individually generating X-rays;
• an X-ray detector configured to detect X-rays from the X-ray source ring;
• a collimator support mechanism provided on an inner circumferential side of the X-ray detection ring and configured to support at least one post-collimator rotatable about a rotation axis;
• a support mechanism driver configured to drive the collimator support mechanism;
• a controller configured to control the support mechanism driver to rotate the at least one post-collimator about the rotation axis in synchronism with generation of X-rays from the plurality of X-ray sources;
• a counting unit configured to count the number of detected X-ray photons;
• and
• a reconstruction unit configured to reconstruct a photon counting CT image based on the number of photons.