Patent ID: 8275448

Claim:
Method for reconstructing a 3D presentation of a hollow organ of a patient based on a plurality of two two-dimensional catheter images detected by a withdrawn catheter including a recording device, comprising: recording at least two fluoroscopy images at two different angles showing the hollow organ and a tip of the catheter; determining a three-dimensional start position of the catheter from the fluoroscopy images in a three-dimensional model of the hollow organ; determining a most probable withdrawal path of the catheter based on the three-dimensional model of the hollow organ; withdrawing the catheter from the start position while recording the two-dimensional catheter images; assigning a withdrawal length to each two-dimensional catheter image; determining a deviation of a position of the catheter from a central path running through a middle of the hollow organ and an orientation of the catheter for each two-dimensional catheter image based on the most probable withdrawal path and the withdrawal length; and reconstructing the 3D presentation of the hollow organ based on the two-dimensional catheter images as well as the deviation of the position of the catheter from the central path and the orientation of the catheter, wherein the deviation of the position of the catheter from the central path is determined from the catheter images during the reconstruction, wherein a fixed threshold for a difference of the deviation from the central path determined from the most probable withdrawal path and from the catheter images is predetermined, wherein if the difference exceeds the fixed threshold, the most probable withdrawal path is recalculated from a position at which the threshold is exceeded, and wherein the recalculated most probable withdrawal path is used for reconstructing the 3D presentation of the hollow organ.