1. A method for generating a radiologic three-dimensional digital volume tomography image of a patient's jaw for use in planning a dental implant, the method comprising: fixing a marker support to the patient's jaw, wherein the marker support is provided with a non-radioopaque support body in which at least 10 spherical radioopaque marker elements are affixed as a grid, and wherein at least one of a nominal size S and a nominal distance D of the spherical radioopaque marker elements to each other is known; image recording the jaw with a digital volume tomography device so as to generate a three-dimensional raw image of the patient's jaw; measuring at least one of a size S′ and a distance D′ of the spherical radioopaque marker elements in the three-dimensional raw image; generating an aberration value by comparing at least one of the size S′ and the distance D′ of the spherical radioopaque marker elements in the three-dimensional raw image with the respective at least one of the nominal size S and the nominal distance D of the spherical radiopaque marker elements; and correcting the three-dimensional raw image with the aberration value so as to generate an exact radiologic three-dimensional digital volume tomography image of the patient's jaw; wherein, each spherical radioopaque marker element has a constant nominal distance D to each neighboring spherical radioopaque marker.