| 摘要 |
PROBLEM TO BE SOLVED: To provide an impedance based catheter location system using registered catheter images.SOLUTION: A method includes inserting a catheter 44 having at least one electrode 64 into a chamber 42 of a body organ 46 of a patient 48, and recording at a sequence of times respective sets of currents between the at least one electrode and a plurality of patches 68 positioned on skin of the patient. The method further includes, while recording the sets of currents, acquiring x-ray images of the at least one electrode, and determining locations of the catheter from the images. A relation is derived between the locations and the respective sets of currents on the basis of the sets of currents and the images. The method also includes recording subsequent sets of currents between the at least one electrode and the patches, and determining, on the basis of the relation, subsequent locations of the catheter in response to the subsequent set of currents.SELECTED DRAWING: Figure 1 |
