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US 2020/0367785 A1Published application
Magnetic field distortion detection and correction in a magnetic localization system
AssigneeSt. Jude Medical International Holding S.à r.l.
InventorsEitan Oren, Alon Izmirli, Adam Fischbach, Charles B. Byrd, Eric Betzler, Scott Meyerson, Guy Hevel, Adrian Herscovici, Roie Shlomovitz, Shay Levi, Nir Ben Dor
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Abstract
Aspects of the present disclosure are directed to systems, apparatuses, and methods for detecting and correcting for magnetic field distortions within a magnetic field used for medical magnetic localization systems.
Claims12
A method for detecting magnetic distortion in a magnetic field for localization of a catheter within a patient, the method including:
- receiving a first set of one or more signals from a metal distortion fixture indicative of the magnetic field sensed by each of the sensor coils within the metal distortion fixture at a first time,
- determining a first magnitude value of the combined signals indicative of a magnetic field at the first time,
- receiving a second set of one or more signals from the metal distortion fixture indicative of the magnetic field sensed by each of the sensor coils at a second time,
- determining a second magnitude value of the combined signals indicative of another magnetic field at the second time,
- determining a magnetic shift in the magnetic field between the first and second magnitude values, and
- comparing the magnetic shift to a threshold shift amount indicative of a magnetic distortion in the magnetic field that causes a substantial variation in the perceived location of the catheter within the patient and an actual location.
3 more elements
Dependencies are inferred from the claim text.