Patent ID: 6585412
Filing Date: 2003-07-01
Classification: A61B

Abstract:
An X-ray calibration dummy comprising:first markings (3) that will appear on X-ray images for use in determining projection geometries of an X-ray system that may be rotated about an axis (A) used for reconstructing a volumnar record; and second markings (4) differing from the first markings (3) and that may be acquired by a position-acquisition system (30) for non-marker-based registration for use in navigation guided operations on an object (P), the second markings (4) being arranged within a first zone (1) of the X-ray calibration dummy (RP) and the first markings (3) being arranged within a second zone (2) of said X-ray calibration dummy that differs from the first zone (1), wherein said X-ray calibration dummy (RP) has a cylindrical shape, the first zone (1) being one of the ends of the cylindrically shaped X-ray calibration dummy (RP) and the second zone (2) being a lateral surface of the cylindrically shaped X-ray calibration dummy.