The invention relates to a method for operating an x-ray diagnostics device having an x-ray source and an x-ray image detector, between which the distance can be adjusted, with an image sequence of low resolution images being provided with a different distance, an adjustment of the coordinates systems of the images being carried out and a high resolution image being calculated from the images. A method for generating high resolution x-ray recordings is achieved here by means of a C-arm system, a so-called C-arm superresolution image.