Patent ID: 7042979

Claim:
An X-ray diagnosis apparatus comprising: an X-ray generator for generating an X-ray according to an X-ray generating condition of an image acquisition mode selected from a plurality of image acquisition modes; an X-ray detector for receiving incidence of the X-ray generated by the X-ray generator, the X-ray detector converts the incident X-ray to an image signal and processes the image signal according to a signal processing condition of the selected image acquisition mode to thereby output image data in the selected image acquisition mode; storage means for storing each of offset data in the plurality of image acquisition modes; first mode offset data calculation means for, when a first mode of the plurality of image acquisition modes is selected, calculating new offset data in the first mode based on offset image data outputted from the X-ray detector in a state that the X-ray is not incident on the X-ray detector and first mode offset data stored in the storage means; second mode offset data calculation means for calculating new offset data in a second mode based on second mode offset data of the plurality of image acquisition modes stored in the storage means and the new offset data in the first mode; image calculation means for, when the second mode is selected, calculating a second mode X-ray image from the image data outputted from the X-ray detector in a state that the X-ray is incident on the X-ray detector and the new offset data in the second mode; and display means for displaying the X-ray image.