DETERMINING CATHETER-TIP 3D LOCATION AND ORIENTATION USING FLUOROSCOPY AND IMPEDANCE MEASUREMENTS

摘要

A method for determining the 3D location of a catheter distal end portion (28) in a patient's body, the distal end portion including an electrode (E₁, the method comprising: (a) placing first (30) and second (32) body-surface patches on the patient in positions such that body region of interest is therebetween; (b) driving an alternating current between the patches (30, 32); (c) measuring the voltage at the electrode (E₁ and substantially contemporaneously capturing a 2D fluoroscopic image of the region of interest; and (d) determining the 3D location of the catheter distal end portion (28) from the image and the measured voltage. A primary application of this method is 3D navigation during cardiac interventional procedures.