Patent ID: 7760926

Claim:
A method for marking a three-dimensional structure on a two-dimensional projection image of an object recorded with an image recording system, comprising: recording two two-dimensional projection images of the object from two different projection directions; determining a position marker on each of the two two-dimensional projection images; calculating coordinates of the position marker in a three-dimensional space based on each of the two two-dimensional projection images; recording a further two-dimensional projection image from a further projection direction; using the calculated coordinates of the position marker in the three-dimensional space, calculating theoretical coordinates for the position marker in the further recorded two-dimensional projection image; and applying the calculated theoretical coordinates to display the further recorded two-dimensional projection image with the calculated theoretical position of the position marker superimposed thereon; generating an image with the position marker superimposed on the further recorded two-dimensional projection image in accord with the calculated theoretical coordinates for the position marker; and displaying the further recorded two-dimensional projection image with the position marker superimposed thereon.