An apparatus and method for detecting, tracking and registering a device within a tubular organ of a subject. The devices include guide wire tip or therapeutic devices, and the detection and tracking uses fluoroscopic images taken prior to or during a catheterization operation. The devices are fused...http://www.google.de/patents/US8126241?utm_source=gb-gplus-sharePatent US8126241 - Method and apparatus for positioning a device in a tubular organ