Patent ID: 7920672

Claim:
A method for determining a gain dataset representing gain coefficients of a two-dimensional X-ray detector being used for X-ray imaging, the method comprising: providing a first gain dataset representing a first X-ray image (G(x,y)), which is generated by direct X-radiation being emitted from an X-ray source and detected by the X-ray detector in the absence of an object of interest; obtaining a second gain dataset representing a second X-ray image, which is based on scattered X-radiation being emitted from the X-ray source and detected by the X-ray detector in the presence of a predetermined object; and combining the first gain dataset with the second gain dataset to obtain the gain dataset representing gain coefficients of the two-dimensional X-ray detector, wherein the gain dataset is configured for use in obtaining a gain corrected image of an object under examination by dividing a third dataset representing an X-ray image acquired for the object under examination by the gain dataset.