1
Charles L Dumoulin, Robert D Darrow, John F Schenck, Steven P Souza: Tracking system to follow the position and orientation of a device with radiofrequency field gradients. General Electric Company, Lawrence P Zale, Marvin Snyder, May 18, 1993: US05211165 (471 worldwide citation)

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 whi ...


2
Charles L Dumoulin, Robert D Darrow, John F Schenck, Peter B Roemer: Tracking system to follow the position and orientation of a device with radiofrequency fields. General Electric Company, Lawrence P Zale, Marvin Snyder, January 3, 1995: US05377678 (335 worldwide citation)

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. The invasive device has a transmit coil attached near its end and is driven by a low power RF source to produce a ...


3
William A Edelstein, Harold J Vinegar, Chia Fu Hsu, Otward M Mueller: Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale. General Electric Company, Lawrence P Zale, Marvin Snyder, August 17, 1993: US05236039 (328 worldwide citation)

An in-situ method of extracting oil from a hydrocarbon bearing layer such as oil-shale or tar sands lying beneath a surface layer comprises applying a radiofrequency excitation signal to the hydrocarbon bearing layer through a system of electrodes. The electrodes are inserted into a matrix of holes ...


4
Charles L Dumoulin, Steven P Souza, Robert D Darrow: Tracking system to monitor the position and orientation of a device using multiplexed magnetic resonance detection. General Electric Company, Lawrence P Zale, Marvin Snyder, June 7, 1994: US05318025 (307 worldwide citation)

A tracking system employs magnetic resonance signals to monitor the position and orientation of at least one device such as a catheter within a subject. The device has a plurality of receiver coils which are sensitive to magnetic resonance signals generated in the subject. These signals are detected ...


5
Robert D Darrow, Charles L Dumoulin: Multi-planar X-ray fluoroscopy system using radiofrequency fields. General Electric Company, Lawrence P Zale, Marvin Snyder, November 30, 1993: US05265610 (280 worldwide citation)

During an X-ray fluoroscopy procedure, the position and orientation of an invasive device, such as a catheter, are measured with radiofrequency fields. The invasive device has a transient coil attached near its end and is driven by a low power RF source to produce a dipole electromagnetic field that ...


6
Charles L Dumoulin, Steven P Souza, Robert D Darrow: Tracking system to monitor the position and orientation of a device using magnetic resonance detection of a sample contained within the device. General Electric Company, Lawrence P Zale, Marvin Snyder, December 21, 1993: US05271400 (271 worldwide citation)

A tracking system employs magnetic resonance signals to monitor the position and orientation of a device, such as a catheter, within a subject. The device has an MR active sample and a receiver coil which is sensitive to magnetic resonance signals generated by the MR active sample. These signals are ...


7
Christopher Allen Nafis, Timothy Patrick Kelliher, William Edward Lorensen, Harvey Ellis Cline, David Egidio Altobelli, Ron Kikinis, Robert David Darrow, Charles Lucian Dumoulin: Computer graphic and live video system for enhancing visualization of body structures during surgery. General Electric Company, Lawrence P Zale, Marvin Snyder, April 21, 1998: US05740802 (271 worldwide citation)

An interactive surgery planning and display system mixes live video of external surfaces of the patient with interactive computer generated models of internal anatomy obtained from medical diagnostic imaging data of the patient. The computer images and the live video are coordinated and displayed to ...


8
Robert D Darrow, Charles L Dumoulin: Automatic gantry positioning for imaging systems. General Electric Company, Lawrence P Zale, Marvin Snyder, October 26, 1993: US05255680 (264 worldwide citation)

A tracking system which measures the position and orientation of invasive devices is used to automatically control the location of the X-ray imaging system gantry and/or patient table. The position and orientation of the invasive device, such as a catheter, are measured by detection of a radiofreque ...


9
Charles L Dumoulin, Robert D Darrow: Inductively coupled RF tracking system for use in invasive imaging of a living body. General Electric Company, Lawrence P Zale, Marvin Synder, August 1, 1995: US05437277 (257 worldwide citation)

RF tracking system employs a RF invasive device coupled to surgical tracking equipment for tracking the invasive device. An inductive coupling permits the device to be quickly coupled to, and decoupled from, the equipment. The coupling comprises an inducting coil which transmits a signal from the su ...


10
Charles L Dumoulin, Robert D Darrow, William J Adams: Display system for enhancing visualization of body structures during medical procedures. General Electric Company, Lawrence P Zale, Marvin Snyder, June 18, 1996: US05526812 (241 worldwide citation)

An interactive display system superimposes images of internal structures on a semi-transparent screen through which a surgeon views a patient during a medical procedure. The superimposed image is derived from image data obtained with an imaging system. An invasive device is also tracked and displaye ...