Patent ID: 7711084

Claim:
Method for determining the actual position of a structure of an object ( 1 ) to be investigated in a coordinate system, wherein a computer tomograph employing CT-technology with a first coordinate system referring to the computer tomograph, a CT-coordinate system, and a coordinate measurement instrument, which coordinate measurement instrument is either a tactile or optical coordinate measurement apparatus, a multisensor coordinate measurement apparatus, or an ultrasound coordinate measurement apparatus, with a second coordinate system referring to this coordinate measurement instrument, an MI-coordinate system, are employed wherein a) the coordinates of the object ( 1 ) to be investigated are determined in the MI-coordinate system, b) a set point position of the structure within the object ( 1 ) to be investigated is pregiven, c) the set point position is determined in the MI-coordinate system after performing the steps a) and b), d) and wherein the computer tomograph and the object ( 1 ) to be investigated are positioned relative to each other under employing the determination of step c) that the set point position of the structure becomes to be situated within a volume captured by the computer tomograph, or aa) the coordinates of the object ( 1 ) investigated are determined in the CT-coordinate system, bb) a set point position of the structure is pregiven within the object ( 1 ) to be investigated, cc) the set point position after performing the steps aa) and bb) is determined in the CT-coordinate system, dd) and the computer tomograph and the object ( 1 ) to be investigated are positioned relative to each other under the employment of the determination of step cc) that the set point position of the structure comes to be situated within the region capturable by the coordinate measurement instrument.