Patent ID: 7386090
Filing Date: 2008-06-10
Classification: A61B,G01B,G01N

Abstract:
1. A process for determining an actual position of a structure of an object to be examined ( 1 ) in a coordinate system, wherein a computed tomography (CT) scanner is employed which uses CT technology, having a first coordinate system, the CT coordinate system, related to said CT scanner, and a coordinate measuring instrument (MI) is employed which is either a tactile or an optical coordinate measuring instrument, a multisensor coordinate measuring instrument, or an ultrasonic coordinate measuring instrument, having a second coordinate system, the MI coordinate system, related to said coordinate measuring instrument, wherein a) coordinates of the object to be examined ( b) a target position of the structure within the object to be examined ( c) after execution of steps a) and b), the target position is determined in the MI coordinate system, d) and, using the determination of step c), the object to be examined ( further characterized in that, by using the CT scanner, a three-dimensional digital CT image of a tolerance volume, including the structure, is created and stored as a CT data record, and the actual position of the structure is determined in the CT coordinate system on the basis of the CT data record.