Patent ID: 6885725

Claim:
An x-ray image diagnosis apparatus, comprising an x-ray source which irradiates x-rays on to a subject, a flat x-ray detector which is disposed facing the x-ray source and includes photo detection elements for converting x-rays transmitted through the subject into light beams and detecting the same, an x-ray detector control means which controls read out of image information outputted from the flat x-ray detector, a sensitivity information memory means which memorizes the sensitivity information outputted from the flat x-ray detector, and a sensitivity correction means which performs sensitivity correction of the image information read out from the flat x-ray detector by making use of the sensitivity information memorized in the sensitivity information memory means, further comprising means for irradiating light beams on to the photo detection elements in the flat x-ray detector in place of x-rays, and means for memorizing the output from the flat x-ray detector caused by the light beam irradiation in the sensitivity information memory means as the sensitivity information.