Patent ID: 6839401

Claim:
An X-ray computed tomography apparatus, comprising: an X-ray source that radiates an X-ray to an object; an X-ray detection device that converts the X-ray passing through the object into X-ray detection image data; at least one X-ray shield located between a focal point of the X-ray source and the X-ray detection device; control means for performing control so as to relatively move the X-ray source and the object; scattered line removing means for calculating a scattered X-ray data component corresponding to a scattered X-ray component from X-ray detection image data corresponding to a region in which a first-order X-ray is shielded by the X-ray shield and calculating a first-order X-ray image data obtained by removing the scattered X-ray component from the X-ray detection image data; complementing means for calculating complemented image data from the first-order X-ray image data by complementing a part of the first-order X-ray image data corresponding to the region in which the first-order X-ray is shielded; and rearranging means for rearranging an image by reversely projecting the complement image data, wherein the complementing means complements the part of the first-order X-ray image data obtained by shielding the first-order X-ray, corresponding to an X-ray path connecting the focal point of the X-ray source with the X-ray shield by using another part of the first-order X-ray image data obtained by the first-order X-ray in non-shield state, corresponding to an X-ray path in a 180-degree opposite direction to the X-ray path connecting the focal point of the X-ray source with the X-ray shield.