Patent ID: 8126227
Filing Date: 2012-02-28
Classification: A61B,Y10S

Abstract:
1. An X-ray computed tomographic apparatus comprising: an X-ray tube which generates X-rays; an X-ray detector which detects X-rays transmitted through a subject to be examined and generates projection data; a reconstruction unit which generates a plurality of original volume data at different scanning times on the basis of the projection data; a position-matching unit which performs positioning between said plurality of original volume data; a difference volume data generating unit which obtains a plurality of difference volume data by performing difference processing between the original volume data at the different scanning times by using said plurality of original volume data after the positioning; and a display image generating unit which generates a display image provided with color or luminance information corresponding to at least one of an arrival time of a contrast medium, a difference volume, a temporal change amount of difference volume, and blood flow velocity information on the basis of the plurality of difference volume data, which further comprises a blood vessel image extraction unit which extracts a blood vessel image from the original volume data, of said plurality of original volume data after the positioning, which are obtained after and before injection of the contrast medium, and in which the display image generating unit generates the display image by providing the blood vessel image with color or luminance information corresponding to at least one of an arrival time of a contrast medium which is obtained on the basis of said difference volume data, a difference volume, a temporal change amount of difference volume, and blood flow velocity information.