Method for correctly geometrically assigning x-ray images

A method for correctly geometrically assigning x-ray images of a patient, which comprises the steps of:

• fixedly attaching an optically operating recording device to an x-ray device generating the x-ray images;
• fixing a dimensionally stable marker surface which can be optically detected by the recording device and defines a reference system to the patient in a fixed relative position;
• bringing the x-ray device into a first and second recording position such that the recording device is directed toward the marker surface in each instance, in a respective recording position the x-ray device producing a first and second x-ray image of the patient and the recording device produces a first and second recording of the marker surface;
• determining a respective geometric position of the first and second x-ray image in the reference system from the first and second recording;
• and
• correcting geometrically the first and second x-ray image assigned to one another in accordance with the respective geometric position.