Patent Document ID: 20090022263
Application ID: 12173748
Patent Status: 0

Claim One:
1. An X-ray CT apparatus for taking an image with one of two materials within a subject to be examined being fractionated, by using two types of X-ray having different energy, said X-ray CT apparatus comprising: a data acquisition device configured to acquire two sets of data corresponding to the two types of X-ray having different energy by scanning using the two types of X-ray; a first image generating device configured to generate a first image based on the two sets of data with pixel values made by weighted addition of two types of CT values corresponding to the two types of X-ray; a second image generating device configured to generate a second image based on the two sets of data, wherein the other one of the two types of material is fractionated; and a third image generating device configured to generate an image by weighted subtraction of the first image and the second image.