| 摘要 |
The invention relates to a method and an examination apparatus ( 10 ) for the observation of a catheter ( 43 ) in a vessel system. First, a 3D model of the vessel system is reconstructed with the help of differently oriented X-ray projections (P<SUB>1</SUB><SUP>A</SUP>, . . .) generated by a C-arm system ( 20 ) during the injection of a contrast agent. Next, a movement corridor (M) of the catheter ( 43 ) is determined from the 3D model. During an examination procedure, current projections (P) are generated showing an image ( 43 ') of the catheter that can be registered with the reconstructed 3D model and/or the movement corridor (M). Based on the known current location ( 43 '') of the catheter in the 3D model of the vessel geometry or the movement corridor (M), an optimal projection direction (d<SUB>opt</SUB>) can be determined and assumed by the C-arm system ( 20 ) for the next projections to be generated.
|
