Patent ID: 8478382

Claim:
A method of depicting a position of a catheter that is within a patient, the method comprising: moving a location marker associated with the catheter along a path in a direction from an entry point toward a destination, wherein the location marker produces a magnetic field; positioning a detector having a first detection zone and a second detection zone such that at least the first detection zone includes a portion of the path, wherein the portion of the path included in the first detection zone is proximal relative to any portion of the path included in the second detection zone; obtaining, via the detector, first measurements of the magnetic field produced by the location marker; determining a first confidence level regarding a first position of the location marker based on the first measurements; displaying an initial representative image of the location marker if the first position is within the first detection zone and the confidence level is above a first threshold value; obtaining, via the detector, second measurements of the magnetic field produced by the location marker; determining a second confidence level regarding a second position of the location marker based on the second measurements; and displaying a subsequent representative image of the location marker if the second position is within one or more of the first and second detection zones and the confidence level is above a second threshold value different than the first threshold value.