Patents by Inventor Charles Lucian Dumoulin

Charles Lucian Dumoulin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10234518
    Abstract: An MR loop coil design incorporates a balun into the loop coil. With this approach, some components of the coil may be simultaneously part of the imaging coil and the balun. Further, with this approach the number of components used to build an MR coil may be reduced, which may result in a reduction in cost, weight and size. This MR loop coil design may also be used to build phased array coils from the smaller loop size. Such an approach may use small feeder circuit boards oriented generally perpendicular to the coil elements to reduce interactions between the feeder boards and the coils. Such feeder boards may also be made smaller than conventional feeder circuits because the integrated balun coil design may reduce the number of components needed to create balanced coils in the array.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: March 19, 2019
    Assignee: Children's Hospital Medical Center
    Inventors: Wolfgang Manfred Loew, Randy Otto Giaquinto, Charles Lucian Dumoulin
  • Publication number: 20180299519
    Abstract: A magnetic resonance (MR) signal detector grid assembly adapted for detection of signals in a magnetic resonance imaging apparatus is disclosed. The MR signal detector grid assembly may comprise a non-resonant grid of a plurality of wire elements and a plurality of detector elements. At least one end of a selected wire element may be electrically attached to an end of at least one other selected wire element. At least one of the detector elements may be configured to detect an MR signal induced on a wire element in the non-resonant grid. The plurality of wire elements may be substantially in the same plane, and the plane may be warped into an arbitrary three-dimensional surface. The three-dimensional surface may have a shape that is cylindrical, partially cylindrical, and/or saddle-shaped. The plurality of wire elements may form a rectilinear grid, a hexagonal grid, a triangular grid, and/or a pseudo-random grid.
    Type: Application
    Filed: June 21, 2018
    Publication date: October 18, 2018
    Applicant: CHILDREN'S HOSPITAL MEDICAL CENTER
    Inventors: CHARLES LUCIAN DUMOULIN, WOLFGANG MANFRED LOEW
  • Patent number: 10031195
    Abstract: The present disclosure describes examples of magnetic resonance (MR) detector that may replace conventional MR imaging coil arrays. The present disclosure generally describes an example coil design approach that may reduce the number of components for MR imaging devices and may eliminate the need of tissue matching. In some examples, this approach implements a non-resonant grid in which MR-induced currents are allowed to flow unconstrained over the grid (unlike conventional phased array coils in which current is constrained to flow within each loop). Current in each element of the grid may be detected with inductively-coupled pickup loops, which may be attached to independent receiver channels of the MR imaging system. In one example, individual integrated balun pickup coils may be inductively coupled to each grid element. Other connection arrangements, however, may be employed if desired.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: July 24, 2018
    Assignee: CHILDREN'S HOSPITAL MEDICAL CENTER
    Inventors: Charles Lucian Dumoulin, Wolfgang Manfred Loew
  • Publication number: 20160033596
    Abstract: The present disclosure describes examples of magnetic resonance (MR) detector that may replace conventional MR imaging coil arrays. The present disclosure generally describes an example coil design approach that may reduce the number of components for MR imaging devices and may eliminate the need of tissue matching. In some examples, this approach implements a non-resonant grid in which MR-induced currents are allowed to flow unconstrained over the grid (unlike conventional phased array coils in which current is constrained to flow within each loop). Current in each element of the grid may be detected with inductively-coupled pickup loops, which may be attached to independent receiver channels of the MR imaging system. In one example, individual integrated balun pickup coils may be inductively coupled to each grid element. Other connection arrangements, however, may be employed if desired.
    Type: Application
    Filed: July 30, 2015
    Publication date: February 4, 2016
    Applicant: CHILDREN'S HOSPITAL MEDICAL CENTER
    Inventors: Charles Lucian Dumoulin, Wolfgang Manfred Loew
  • Publication number: 20150241529
    Abstract: An MR loop coil design incorporates a balun into the loop coil. With this approach, some components of the coil may be simultaneously part of the imaging coil and the balun. Further, with this approach the number of components used to build an MR coil may be reduced, which may result in a reduction in cost, weight and size. This MR loop coil design may also be used to build phased array coils from the smaller loop size. Such an approach may use small feeder circuit boards oriented generally perpendicular to the coil elements to reduce interactions between the feeder boards and the coils. Such feeder boards may also be made smaller than conventional feeder circuits because the integrated balun coil design may reduce the number of components needed to create balanced coils in the array.
    Type: Application
    Filed: February 20, 2015
    Publication date: August 27, 2015
    Applicant: CHILDREN'S HOSPITAL MEDICAL CENTER
    Inventors: Wolfgang Manfred Loew, Randy Otto Giaquinto, Charles Lucian Dumoulin
  • Patent number: 8024025
    Abstract: An apparatus and method for correcting magnetic resonance temperature measurements is disclosed. In one aspect, the method identifies monitoring regions of interest outside a therapeutic region of interest. Next, a pulse sequence sensitive to changes in T1 and proton density is used to measure the temperature changes in these regions. Next, the PRFS is measured in these same regions. The PRFS in these regions will be caused both by the desired shift from temperature change, and the undesired shift from background magnetic field changes. Using the measured temperature changes from the T1-method, the component of the PRFS due to actual temperature changes is subtracted from the PRFS method, leaving only the component caused by the unwanted magnetic field changes. This analysis is performed separately for each region. At the end of this step, one has measured the change in background magnetic field within each region.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: September 20, 2011
    Assignee: General Electric Company
    Inventors: Richard Philip Mallozzi, Charles Lucian Dumoulin
  • Patent number: 7948385
    Abstract: The present invention related to devices and methods for using ferrite alignment keys in wireless remote sensor assemblies. In one aspect, the invention provides wireless resonant sensor assemblies comprising a pick-up coil, a ferrite alignment key positioned in and extending from the pick-up coil, and wireless resonant sensor having a receiving element wherein the pick-up coil and the wireless resonant sensor align upon insertion of the ferrite alignment key into the receiving element. The ferrite alignment key may also be part of a resonant sensor such that insertion of a pick-up coil into a receiving element of the alignment key results in a configuration where the alignment key is positioned in and extended from the pick-up coil. Methods of measuring one or more parameters of a monitoring system are also provided. The insertion of the ferrite alignment key aligns the pick-up coil and wireless resonant sensor thereby increasing sensing of the wireless resonant sensor by the pick-up coil.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: May 24, 2011
    Assignee: General Electric Company
    Inventors: Radislav Alexandrovich Potyrailo, William Guy Morris, Charles Lucian Dumoulin, Cheryl Margaret Surman
  • Patent number: 7787935
    Abstract: A method for tracking a device used in an imaging system is provided. The method includes using a trigger for initiating a determination of multiple device locations. The scan parameters are then adjusted using the multiple device locations. Finally, a dynamically corrected image is acquired, where the adjusted scan parameters provide an offset for at least one scan parameter.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: August 31, 2010
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Robert David Darrow
  • Publication number: 20100141273
    Abstract: The present invention related to devices and methods for using ferrite alignment keys in wireless remote sensor assemblies. In one aspect, the invention provides wireless resonant sensor assemblies comprising a pick-up coil, a ferrite alignment key positioned in and extending from the pick-up coil, and wireless resonant sensor having a receiving element wherein the pick-up coil and the wireless resonant sensor align upon insertion of the ferrite alignment key into the receiving element. The ferrite alignment key may also be part of a resonant sensor such that insertion of a pick-up coil into a receiving element of the alignment key results in a configuration where the alignment key is positioned in and extended from the pick-up coil. Methods of measuring one or more parameters of a monitoring system are also provided. The insertion of the ferrite alignment key aligns the pick-up coil and wireless resonant sensor thereby increasing sensing of the wireless resonant sensor by the pick-up coil.
    Type: Application
    Filed: December 9, 2008
    Publication date: June 10, 2010
    Applicant: General Electric Company
    Inventors: Radislav Alexandrovich Potyrailo, William Guy Morris, Charles Lucian Dumoulin, Cheryl Margaret Surman
  • Patent number: 7725157
    Abstract: An imaging and interventional system and methods are provided. The system comprises an imaging device for acquiring volumetric image data for an anatomical region of interest, a catheter for acquiring electrophysiological (EP) measurements of the anatomical region of interest, the catheter having at least one tracking coil for detecting signals indicative of a position of the catheter, and, a processor coupled to the catheter for receiving the EP measurements and signals indicative of the position of the catheter. The position of the catheter and EP measurements are combined and superimposed on a resultant image. The method comprises acquiring volumetric image data for an anatomical region of interest, acquiring position data for a catheter inserted in the region of interest, obtaining electrophysiological (EP) measurements for the region of interest and combining the image data, position data and EP measurements into a resultant image for use in the interventional procedure.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: May 25, 2010
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Richard Philip Mallozzi, Robert David Darrow, Harvey Ellis Cline, Renee Ann Guhde
  • Publication number: 20090275821
    Abstract: An apparatus and method for correcting magnetic resonance temperature measurements is disclosed. In one aspect, the method identifies monitoring regions of interest outside a therapeutic region of interest. Next, a pulse sequence sensitive to changes in T1 and proton density is used to measure the temperature changes in these regions. Next, the PRFS is measured in these same regions. The PRFS in these regions will be caused both by the desired shift from temperature change, and the undesired shift from background magnetic field changes. Using the measured temperature changes from the T1-method, the component of the PRFS due to actual temperature changes is subtracted from the PRFS method, leaving only the component caused by the unwanted magnetic field changes. This analysis is performed separately for each region. At the end of this step, one has measured the change in background magnetic field within each region.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 5, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Richard Philip Mallozzi, Charles Lucian Dumoulin
  • Patent number: 7573267
    Abstract: A system and method for active MR tracking includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, an RF coil assembly positioned in the bore, and a pulse module. The MRI system also includes a polarization reversal switch controlled by the pulse module to transmit RF signals to the RF coil assembly coupled to the polarization reversal switch and an RF switch controlled by the pulse module to transmit the RF signals to the polarization reversal switch.
    Type: Grant
    Filed: January 19, 2008
    Date of Patent: August 11, 2009
    Assignee: General Electric Company
    Inventors: Richard Philip Mallozzi, Charles Lucian Dumoulin
  • Publication number: 20090184712
    Abstract: A system and method for active MR tracking includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, an RF coil assembly positioned in the bore, and a pulse module. The MRI system also includes a polarization reversal switch controlled by the pulse module to transmit RF signals to the RF coil assembly coupled to the polarization reversal switch and an RF switch controlled by the pulse module to transmit the RF signals to the polarization reversal switch.
    Type: Application
    Filed: January 19, 2008
    Publication date: July 23, 2009
    Inventors: Richard Philip Mallozzi, Charles Lucian Dumoulin
  • Publication number: 20080200973
    Abstract: In accordance with embodiments of the present technique an electrode pad for medical use is provides. The electrode pad comprises a support layer a plurality of electrodes mounted on the support layer and electrically insulated from one another, and a plurality of leads electrically coupled to the electrodes for selectively placing the electrodes at a desired electrical potential.
    Type: Application
    Filed: February 20, 2007
    Publication date: August 21, 2008
    Inventors: Richard Philip Mallozzi, Charles Lucian Dumoulin
  • Publication number: 20080009700
    Abstract: An imaging and interventional system and methods are provided. The system comprises an imaging device for acquiring volumetric image data for an anatomical region of interest, a catheter for acquiring electrophysiological (EP) measurements of the anatomical region of interest, the catheter having at least one tracking coil for detecting signals indicative of a position of the catheter, and, a processor coupled to the catheter for receiving the EP measurements and signals indicative of the position of the catheter. The position of the catheter and EP measurements are combined and superimposed on a resultant image. The method comprises acquiring volumetric image data for an anatomical region of interest, acquiring position data for a catheter inserted in the region of interest, obtaining electrophysiological (EP) measurements for the region of interest and combining the image data, position data and EP measurements into a resultant image for use in the interventional procedure.
    Type: Application
    Filed: May 16, 2006
    Publication date: January 10, 2008
    Applicant: General Electric Company
    Inventors: Charles Lucian Dumoulin, Richard Philip Mallozzi, Robert David Darrow, Harvey Ellis Cline, Renee Ann Guhde
  • Patent number: 7282915
    Abstract: An RF coil assembly for use in a multiple receive-channel MRI system is provided. The RF coil assembly is configured as a multi-turn-element RF coil assembly to operate as a surface-coil array in cooperation with the MRI system which is configured to operate in a multiple-channel receive mode.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: October 16, 2007
    Assignees: General Electric Company, The John Hopkins University
    Inventors: Randy Otto John Giaquinto, Harvey Ellis Cline, Christopher Judson Hardy, Charles Lucian Dumoulin, Paul Arthur Bottomley
  • Patent number: 7009396
    Abstract: A method and apparatus for producing an image from an extended volume of interest within a subject using a Magnetic Resonance Imaging (MRI) system are provided. The method comprises translating the volume using a positioning device along an axis of the MRI system. A plurality of MR signals are detected from at least one radiofrequency (RF) coil array for a given field-of-view within the MRI system as the positioning device is translated. The plurality of MR signals are sent to a plurality of receivers wherein the receivers are each adapted to adjust their respective center frequencies at a rate commensurate with a rate of translation of the positioning device. A plurality of respective sub-images corresponding to the plurality MR signals for each of the plurality of receivers are combined to form a composite image of the volume of interest.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: March 7, 2006
    Assignee: General Electric Company
    Inventors: Yudong Zhu, Charles Lucian Dumoulin
  • Patent number: 6876199
    Abstract: A method of and system for parallel imaging using a Magnetic Resonance Imaging (MRI) system is provided. The method comprises acquiring a plurality of magnetic resonance (MR) signals from a receiver coil array placed about a subject in the MRI system, where the receiver coil array has a plurality of receiver elements arranged in rows and, during application of a readout gradient in a frequency encoding direction, shifting receiver frequencies by a selectable amount for each row of the array in order to shift a limited field of view (FOV) in the frequency encoding direction.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: April 5, 2005
    Assignee: General Electric Company
    Inventors: Christopher Judson Hardy, Charles Lucian Dumoulin
  • Publication number: 20040239324
    Abstract: A method of and system for parallel imaging using a Magnetic Resonance Imaging (MRI) system is provided. The method comprises acquiring a plurality of magnetic resonance (MR) signals from a receiver coil array placed about a subject in the MRI system, where the receiver coil array has a plurality of receiver elements arranged in rows and, during application of a readout gradient in a frequency encoding direction, shifting receiver frequencies by a selectable amount for each row of the array in order to shift a limited field of view (FOV) in the frequency encoding direction.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 2, 2004
    Applicant: General Electric Medical Systems Global Technology Company
    Inventors: Christopher Judson Hardy, Charles Lucian Dumoulin
  • Publication number: 20040051529
    Abstract: A method and apparatus for producing an image from an extended volume of interest within a subject using a Magnetic Resonance Imaging (MRI) system are provided. The method comprises translating the volume using a positioning device along an axis of the MRI system. A plurality of MR signals are detected from at least one radiofrequency (RF) coil array for a given field-of-view within the MRI system as the positioning device is translated. The plurality of MR signals are sent to a plurality of receivers wherein the receivers are each adapted to adjust their respective center frequencies at a rate commensurate with a rate of translation of the positioning device. A plurality of respective sub-images corresponding to the plurality MR signals for each of the plurality of receivers are combined to form a composite image of the volume of interest.
    Type: Application
    Filed: September 12, 2002
    Publication date: March 18, 2004
    Applicant: General Electric Company
    Inventors: Yudong Zhu, Charles Lucian Dumoulin