Reducing capacitance effects in active current location (acl)
AssigneeBiosense Webster (Israel) Ltd.
InventorAssaf Govari
Life of this patent
Estimating the term…
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 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 impedance-magnitudes, one or more probe zero-frequency impedance-magnitudes between the probe and the one or more body-surface electrodes are estimated. The location of the probe in the organ is estimated based on the one or more probe zero-frequency impedance-magnitudes.
Claims10
A location tracking method, comprising:
- measuring one or more first impedance-magnitudes, between a probe located at a location in an organ of a patient and one or more body-surface electrodes, at a first electrical frequency;
- measuring one or more second impedance-magnitudes, between the probe located at the location and the one or more body-surface electrodes, at a second electrical frequency;
- estimating, based on the measured first and second impedance-magnitudes, one or more probe zero-frequency impedance-magnitudes between the probe and the one or more body-surface electrodes;
- and
- estimating the location of the probe in the organ based on the one or more probe zero-frequency impedance-magnitudes.
A location tracking system, comprising:
- a memory, which is configured to store (i) one or more first impedance-magnitudes, measured at a first electrical frequency between a probe located at a location in an organ of a patient and one or more body-surface electrodes, and (ii) one or more second impedance-magnitudes, measured at a second electrical frequency between the probe located at the location and the one or more body-surface electrodes;
- and
- a processor configured to:
- based on the measured first and second impedance-magnitudes, estimate one or more probe zero-frequency impedance-magnitudes between the probe and the one or more body-surface electrodes;
- and
- estimate the location of the probe in the organ based on the one or more probe zero-frequency impedance-magnitudes.
Dependencies are inferred from the claim text.