Patent ID: 9597008
Date: 2017-03-21
CPC Classifications: A61B,G01B,G01R,H01F

Claim:
1. A method of obtaining information about at least one of a position and an orientation of a magnetized elongate component of a medical device relative to a magnetometric detector, the magnetized elongate component and the magnetometric detector being moveable independently from each other relative to a static secondary magnetic field, the method comprising: obtaining measurements, in presence of a combination of the magnetic field of the magnetized elongate component and the static secondary magnetic field essentially simultaneously, of at least one of a strength and an orientation of a magnetic field at at least a first position and a second position spatially associated with the magnetometric detector, the second position being distanced from the first position; and combining the measurements to computationally eliminate an effect of the static secondary magnetic field by fitting the measurements to a model of the magnetic field of the magnetized elongate component, said model modeling the magnetic field of the magnetized elongate component as two spaced-apart magnetic charges, to derive the information about at least one of the position and the orientation of the magnetized elongate component.