Distortion-immune position tracking using redundant...

Details Distortion-immune position tracking using redundant... Distortion-immune position tracking using redundant...

G - Physics

01

V

G01V 3/08 (2006.01) A61B 5/06 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2596404

A method for tracking a position of an object includes using a field sensor associated with the object to measure field strengths of magnetic fields generated by two or more field generators, wherein a measurement of at least one of the field strengths is subject to a distortion. Rotation-invariant location coordinates of the object are calculated responsively to the measured field strengths. Corrected location coordinates of the object are determined by applying to the rotation--invariant location coordinates a coordinate correcting function so as to adjust a relative contribution of each of the measured field strengths to the corrected location coordinates responsively to the distortion in the measured field strengths.

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