A method and an image data record processing facility are disclosed for correcting image data of an examination object, which includes a first image data record obtained using a first X-ray energy and a second image data record obtained using a second X-ray energy. In this process, a corrected image data record is generated by subtracting from image point values at certain image point positions of the first image data record, image point values, which are assigned to the corresponding image point positions in the second image data record, multiplied by a weighting factor. The weighting factor here is selected as a function of the first X-ray energy used and the second X-ray energy used so that on subtraction a calcium component is removed from the image point values. A method for generating image data and an X-ray system having such an image data record processing facility are also described.
