Patent ID: 8861826
Filing Date: 2014-10-14
Classification: A61B

Abstract:
1. An X-ray CT device comprising an X-ray generating part, an X-ray detecting part oppositely disposed to the X-ray generating part, a revolving mechanism part for revolving a pair of the X-ray generating part and the X-ray detecting part, an image processing part for creating a CT image of a subject on the basis of X-ray transmission images of the subject acquired at a plurality of positions along the circumferential direction of the revolution, and a display part for displaying the CT image, wherein: the image processing part comprises: a region-of-interest setting part which sets a region of interest in the CT image, a data value converting part which converts a data value of the CT image in the region of interest to another value, a forward projection part which performs forward projection of the CT image including the CT image of the ROI, in which the data value is converted, and the CT image of a region outside the ROI, from a virtual X-ray generating part to a virtual X-ray detecting part to calculate a pseudo X-ray transmission image, and a difference calculating part which calculates difference between the X-ray transmission image and the pseudo X-ray transmission image to create a differential image.