#$%^&*AU2019204307A120200227.pdf#####ABSTRACT A method for location tracking, includes measuring one or more first impedance-magnitudes, between a probe located at a location in an organ of a patient and one or more 5 body-surface electrodes, at a first electrical frequency. One or more second impedance-magnitudes, between the probe located at the location and the one or more body-surface electrodes, are measured at a second electrical frequency. Based on the measured first and second impedance10 magnitudes, one or more probe zero-frequency impedancemagnitudes between the probe and the one or more bodysurface electrodes are estimated. The location of the probe in the organ is estimated based on the one or more probe zero-frequency impedance-magnitudes.1/3 ED LO >； C) C) CO CIO 0 U) U) LU CO CO C) 0 LO CIO CIO 00 00 cn N cn cn 10 04 Co N CL 00 CIO 'T0 N LL LO N
