Patent ID: 7505549

Claim:
An X-ray diagnosis apparatus, comprising: an X-ray tube configured to irradiate a subject with an X-ray; an X-ray detection unit configured to detect an X-ray transmitted through the subject; an image data generating unit configured to generate 3D image data based on an output from said X-ray detection unit during a first radiographic operation; a storage unit configured to store the generated 3D image data and associated radiographic conditions; a 3D image processing unit configured to generate projection image data from the stored 3D image data and the associated radiographic conditions based on a current projection angle and position of the X-ray tube and the X-ray detection unit during a second radiographic operation; and a display unit configured to display the projection image data, wherein said 3D image processing unit comprises an extraction unit configured to extract a surface of a target region from the 3D image data, a distance calculating unit configured to calculate a distance from a projection surface to the surface, and a unit configured to project the 3D image data based on the calculated distance.