05211165 is referenced by 471 patents and cites 13 patents.

A tracking system in which radiofrequency signals emitted by an invasive device such as a catheter are detected and used to measure the position and orientation of the invasive device within a subject. Detection of the radiofrequency signals is accomplished with coils having sensitivity profiles which vary approximately linearly with position. The invasive device has a transmit coil attached near its end and is driven by a low power RF source to produce a dipole electromagnetic field that can be detected by an array of receive coils distributed around a region of interest of the subject. The position and orientation of the device as determined by the tracking system are superimposed upon independently acquired Medical Diagnostic images, thereby minimizing the diagnostic exposure times. One or more invasive devices can be simultaneously tracked.

Title
Tracking system to follow the position and orientation of a device with radiofrequency field gradients
Application Number
7/753565
Publication Number
5211165
Application Date
September 3, 1991
Publication Date
May 18, 1993
Inventor
Steven P Souza
Williamstown
MA, US
John F Schenck
Schenectady
NY, US
Robert D Darrow
Scotia
NY, US
Charles L Dumoulin
Ballston Lake
NY, US
Agent
Marvin Snyder
Lawrence P Zale
Assignee
General Electric Company
NY, US
IPC
A61B 5/00
A61B 6/00
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