Patent ID: 9248003
Filing Date: 2016-02-02
CPC Classification: A61B,G08B

Claim Text:
1. A method of locating a marker associated with a patient, said marker having a marker resonant frequency, the method comprising: (a) implanting said marker in the patient; (b) applying an excitation at a frequency selected from a set of frequencies to said marker using an excitation source; (c) receiving a set of plurality of inputs indicative of a magnetic flux sensed over an observation interval and induced by said marker in response to said excitation at said one of a set of frequencies; (d) automatically adjusting the observation interval based at least in part on the set of plurality of inputs; (e) iteratively repeating steps (b)-(c) for all of the frequencies in said set of frequencies; (f) identifying said marker resonant frequency based upon the multiple sets of plurality of inputs; (g) adjusting said excitation source to provide further excitation at said marker resonant frequency; (h) receiving a resonance set of plurality of inputs indicative of a sensed magnetic flux induced by said marker in response to said excitation at said marker resonant frequency; and (i) analyzing said resonance set of plurality of inputs to determine said location of said marker, wherein analyzing said resonance set of plurality of inputs to determine said location of said marker includes comparing said resonance set of inputs to reference measurements corresponding to known locations within a bounding volume.