Tracking system to follow the position and orientation of a devi

Details Tracking system to follow the position and orientation of a devi Tracking system to follow the position and orientation of a devi

1991-09-03

1993-05-18

Cohen, Lee S.

Surgery

Truss

Pad

1286532, 128899, 378 62, A61B 600, A61B 500

Patent

active

052111652

ABSTRACT:
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.

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