Patent ID: 8185192

Claim:
A system for correcting distortion in an electro-potential position sensing system, comprising; at least two electrodes operable to be positioned on a surface of a volume; a driver to inject a current between the at least two electrodes to generate a current along an axis; a mapping instrument operable to be positioned in a volume having a first electrode and a second electrode; a processor operable to receive input from the first electrode and the second electrode fixed to the mapping instrument; a storage system; and a display device; wherein the processor is operable to execute instructions to: determine a first position of the first electrode and a second position of a second electrode on the instrument; determine a vector from the first electrode on the instrument to the second electrode on the instrument based on the determined first position and second position; determine a corrected map data point as a point a distance from the determined first position, wherein the distance is related to a physical distance of the first electrode from the second electrode on the instrument, wherein the corrected map data point is related to the determined first position; wherein the storage system is operable to store a plurality of first positions and related corrected map data.