Patent ID: 7769428

Claim:
A method of determining the location of the distal end of a magnetically orientable medical device at a selected point in an operating region in a subject's body, the method comprising: determining the location of a base of the magnetically orientable medical device; navigating the distal end of the magnetically orientable medical device to a selected point in the operating region in the subject's body with a magnetic navigation system that applies a magnetic field to the magnetically orientable medical device; storing information representative of the magnetic field being applied by the magnetic navigation system to the magnetically orientable medical device at the selected point; and determining the location of the distal end of the magnetically orientable medical device based upon the determined location of the base of the magnetically orientable medical device using a computational model of the magnetically orientable medical device and the stored information representative of the magnetic field to determine the location of the distal end of the medical device relative to the base.