Patent ID: 9271664
Filing Date: 2016-03-01
CPC Classification: A61B,G01R,G06T

Claim Text:
1. A composite tracking system for tracking a medical device, the tracking system configured to be used in an MR environment, comprising: an MR compatible field location tracking system including at least one field location sensor structured to be coupled to an outside of the medical device, said medical device movably positioned within a patient; a magnetic resonance tracking system including at least one tracking coil structured to be coupled to the outside of the medical device; and a processor in electrical communication with the field location tracking system and the magnetic resonance tracking system, the processor operable to (a) receive and process a plurality of positional coordinates from the magnetic resonance tracking system and calculate a plurality of magnetic resonance tracking locations, (b) receive and process a plurality field location parameters from the field location tracking system and determine a plurality of field location parameters that correspond to the plurality of magnetic resonance tracking locations, (c) generate a transfer function for mapping the field location parameters from the field location tracking system to the corresponding positional coordinates of the magnetic resonance tracking system to register the field location coordinate system to the magnetic resonance coordinate system, and (d) determine a present location of the field location sensor by applying the transfer function, wherein said at least one field location sensor and said at least one tracking coil are configured to move relative to the patient.