Patent ID: 9474467
Filing Date: 2016-10-25
CPC Classification: A61B

Claim Text:
1. A method comprising: causing current to flow between each of three or more sets of current-injecting electrodes on a first catheter inserted into an organ in a patient's body, the organ having a periphery; in response to current flow caused by each set of current injecting electrodes, measuring electric signals at each of multiple measuring electrodes on the first catheter and measuring an electrical signal at each of one or more measuring electrodes on one or more additional catheters inserted into the organ in the patient's body; determining location information for the three or more sets of current-injecting electrodes on the first catheter; determining a position of each of one or more of the one or more measuring electrodes on the one or more additional catheters relative to the first catheter based on the measured signals for the measuring electrodes on the first catheter and the one or more additional catheters; and determining a position of each of one or more of the one or more measuring electrodes on the one or more additional catheters relative to a fixed reference point based on an independent tracking system.