METHOD FOR RECONSTRUCTING A DIGITAL REPRESENTATION OF OBJECT FEATURES OF AN EXAMINATION OBJECT IN THE POSITION SPACE OF AN X-RAY SYSTEM

摘要

The present invention relates to a method for reconstructing a digital representation of object features 4 of an examination object 5 in the position space of an x-ray system, which has: - at least one x-ray tube 1, 1'; - at least one x-ray detector 2, 2'; and - an examination object 5 arranged therebetween, x-radiation being radiated through the examination object 5, comprising the following steps: creating at least two projection images of the examination object by means of the x-ray system; performing pattern recognition in order to locate the image regions in the projection images, which contain a specifiable feature pattern; performing pattern conversion in order to convert the feature patterns into feature pattern coordinates 3, 3'; determining the beam paths from the relative x-ray tube position in question to the feature pattern coordinates 3, 3' while taking into account the system geometries of the x-ray system during the creation of the projection images; calculating the beam intersection coordinates 6, which represent potential feature positions, from the beam paths of two system geometries; performing a cluster analysis together with extraction of the reconstructed feature position(s) 7 from all the calculated beam intersection coordinates 6. The invention also relates to an x-ray system, which is designed in such a way as to be able to carry out a method according to the invention.