US Patent 8000772 Metal immunity in a reverse magnetic system

Patent 8000772 was granted and assigned to Biosense Webster on August, 2011 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Biosense Webster

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

8000772

Date of Patent

August 16, 2011

Patent Application Number

11253913

Date Filed

October 19, 2005

Patent Primary Examiner

‌

Tse Chen

Patent abstract

A method for tracking an object includes fixing to the object a transmitter for transmitting a position-indicative magnetic field and providing a map of distortion of the position-indicative magnetic field caused by the object. A distorted magnetic field transmitted from the object is sensed. The distorted magnetic field includes the position-indicative magnetic field subject to the distortion caused by the object. Estimated coordinates of the object based on the sensed, distorted magnetic field are determined. The estimated coordinates and the map are used to compute corrected coordinates.