Patent ID: 8290233
Filing Date: 2012-10-16
Classification: A61B

Abstract:
1. An X-ray computed tomography apparatus comprising: an X-ray generating unit configured to generate X-rays; an area detector configured to detect X-rays which are generated by the X-ray generating unit and transmitted through an object; a reconstruction processing unit configured to reconstruct first volume data and second volume data which include an overlap region, based on an output from the area detector; an extraction unit configured to extract a plurality of first slice images inside or near the overlap region from the first volume data and extract a plurality of second slice images inside or near the overlap region from the second volume data; a calculation unit configured to calculate, for each pixel array including the pixel value, a difference value or an absolute value of the difference value between a sum of pixel values along a direction perpendicular to slice surfaces of the plurality of first slice images and a sum of pixel values along the perpendicular direction in the plurality of second slice images; a determination unit configured to determine for the each pixel array whether the difference value or the absolute value of the difference value falls within a predetermined range; and a combining unit configured to combine the first volume data and the second volume data upon position matching and selectively set a pixel value of each pixel in the overlap region to either one of a pixel value of the first volume data and a pixel value of the second volume data or a value derived from pixel values of the first volume data and the second volume data in accordance with the determination result.