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).

  • Publication number: 20040034297
    Abstract: A medical device positioning system and method for use during a medical procedure on a subject performed during imaging are provided. The system comprises a medical device adapted for internal use within the subject for performing the medical procedure and an imaging device for acquiring image data of a region of interest within the subject. Additionally, the system includes a medical device monitoring subsystem for monitoring position of the medical device relative to a target region of interest within the subject and for providing feedback to an interface unit when the position of the medical device deviates from the target region of interest.
    Type: Application
    Filed: August 13, 2002
    Publication date: February 19, 2004
    Applicant: General Electric Company
    Inventors: Robert David Darrow, Charles Lucian Dumoulin
  • Patent number: 6687530
    Abstract: A method and system for tracking the location of a device within the field of view of a Magnetic Resonance Imaging (MRI) system are provided. The method comprises computing a centroid of signal intensity in a region centered about a location of maximum signal intensity, Lmax of acquired magnetic resonance (MR) signals corresponding to the device.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: February 3, 2004
    Assignee: General Electric Company
    Inventor: Charles Lucian Dumoulin
  • Patent number: 6611702
    Abstract: An incubator arrangement and radiofrequency (RF) coil are provided for use in a Magnetic Resonance Imaging (MRI) system. The incubator arrangement comprises an enclosure adapted to support a subject in a magnet of the MRI system during imaging and a radiofrequency coil disposed within the enclosure. The RF coil is adapted to provide visual and physical access to the subject, and further adapted to obtain a selected signal to noise ratio.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: August 26, 2003
    Assignee: General Electric Company
    Inventors: Kenneth William Rohling, Ronald Dean Watkins, Charles Lucian Dumoulin, Joseph Edward Piel, Jr., Charles John Rossi, Jr., Randy Otto John Giaquinto
  • Publication number: 20030120146
    Abstract: A method and system for tracking the location of a device within the field of view of a Magnetic Resonance Imaging (MRI) system are provided. The method comprises computing a centroid of signal intensity in a region centered about a location of maximum signal intensity, Lmax of acquired magnetic resonance (MR) signals corresponding to the device.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 26, 2003
    Applicant: General Electric Company
    Inventor: Charles Lucian Dumoulin
  • Patent number: 6584337
    Abstract: A method and apparatus for producing an image from an extended volume of interest using a Magnetic Resonance Imaging (MRI) system are provided. The apparatus comprises a magnet assembly, a gradient coil assembly, at least one radiofrequency coil, a positioning device for translating the volume using along an axis of the MRI system and a plurality of receivers. A plurality of MR signals are detected from the radiofrequency (RF) coil, as the positioning device is translated, and are sent to the plurality of receivers. Each of the receivers are configured to be adjusted in either phase or frequency in response to the positioning device being translated. A plurality of respective sub-images are computed corresponding to the plurality of MR signals for each of the receivers and for the given field-of-view (FOV) at each of the incremented positions. A composite image of the volume of interest is formed by combining the respective sub-images.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: June 24, 2003
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Yudong Zhu
  • Patent number: 6571020
    Abstract: Secondary data set information is incorporated into a primary data set (such as a digital image) retaining a desired dynamic range and retaining the original primary set data quality. The secondary data set information is ‘smuggled’ into the least significant bits of the primary data set to result in an enhanced data set. If desired, the primary data word can be shifted toward the most significant bit. The enhanced data set may be viewed as if it were the original primary data set with existing playback devices, however it now includes additional ‘smuggled’ information which may be played back in coordination with the primary data set information. One example is flow-direction information ‘smuggled’ into an angiographic image. The least significant bits of the enhanced data words may be used to select the color map and color code the images. A user-adjustable intensity threshold can also be employed to select between color maps.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: May 27, 2003
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Robert David Darrow
  • Patent number: 6492814
    Abstract: A self-localizing receive coil system for use with a Magnetic Resonance Imaging (MRI) system comprises at least one surface coil assembly for placement adjacent to a region of interest to be imaged and a plurality of tracking devices attached to the surface coil assembly for use in indicating location and orientation of the surface coil assembly during imaging.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: December 10, 2002
    Assignee: General Electric Company
    Inventors: Ronald Dean Watkins, Charles Lucian Dumoulin, Robert David Darrow
  • Publication number: 20020173717
    Abstract: An incubator arrangement and radiofrequency (RF) coil are provided for use in a Magnetic Resonance Imaging (MRI) system. The incubator arrangement comprises an enclosure adapted to support a subject in a magnet of the MRI system during imaging and a radiofrequency coil disposed within the enclosure. The RF coil is adapted to provide visual and physical access to the subject, and further adapted to obtain a selected signal to noise ratio.
    Type: Application
    Filed: May 21, 2001
    Publication date: November 21, 2002
    Inventors: Kenneth William Rohling, Ronald Dean Watkins, Charles Lucian Dumoulin, Joseph Edward Piel, Charles John Rossi, Randy Otto John Giaquinto
  • Patent number: 6470204
    Abstract: An insertable intracavity probe for use in Magnetic Resonance Imaging (MRI) and therapy of a region of interest proximal to a cavity, the probe having a substantially rigid probe shell for insertion into the cavity. The probe shell is adapted to incorporate at least one device for imaging the region of interest. A guide track is incorporated in the probe shell and is adapted to guide at least one biopsy or therapy device to the region of interest during imaging. Intracavity regions include cervical, rectal, and other regions associated with internal cavities of a patient.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: October 22, 2002
    Inventors: Egidijus Edward Uzgiris, Kenneth William Rohling, Ronald Dean Watkins, Robert David Darrow, Charles Lucian Dumoulin, Randy Otto John Giaquinto, Michael Edward Moran
  • Patent number: 6466018
    Abstract: A rotating body coil assembly for use with an open MR magnet for imaging at least a portion of a subject comprises a resonant structure configured to rotate about the subject and to permit access to the subject during imaging. The body coil assembly comprises first and second end ring assemblies positioned on opposing sides of the imaging space. The first and second end ring assemblies are each configured to energize the body coil assembly. A plurality of element assemblies are disposed between and connecting the first and second end ring assemblies for providing structural support and electrical isolation of the body coil assembly. A base assembly is coupled to the first and second end ring assemblies and at least one of the element assemblies.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: October 15, 2002
    Assignees: General Electric Company, Imperial College of Science and Medicine
    Inventors: Charles Lucian Dumoulin, Philip Trefor Jones, William Alan Edelstein, Benjamin Assif, Nissim Ben Hamo, David Keren
  • Patent number: 6289233
    Abstract: An MRI system acquires NMR tracking data from a tracking coil imbedded in a medical device which is guided by a physician using real time anatomic images produced from image data acquired by the MRI system. A Hadamard magnetic resonance tracking sequence is used to update the tracking coil location which is indicated on the anatomic image. The Hadamard sequence uses four different acquisition, but tracking coil location is updated after each acquisition, using the new acquisition and three previously acquired acquisitions.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: September 11, 2001
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Robert David Darrow
  • Patent number: 6288541
    Abstract: An MRI system repeatedly performs a pulse sequence during a time interval &Dgr;T in which a surge of blood flows through a vessel whose compliance is to be measured. Two spaced-apart slices are simultaneously excited by each pulse sequence and the transverse magnetization is flow-encoded before an NMR signal is acquired in the presence of a readout gradient pulse. The change in phase of the NMR signal is used to detect when the wave arrives at each slice location, and from this information blood vessel compliance may be calculated.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: September 11, 2001
    Assignee: General Electric Company
    Inventor: Charles Lucian Dumoulin
  • Patent number: 6275721
    Abstract: A scan control device located in the bore of an MRI system magnet includes tracking coils and a display. Location and alignment of the scan control device is tracked by the MRI system using signals acquired from the tracking coils. These signals are also used to update the scan parameters such that the scan plane of the image acquired by the MRI system is controlled by the scan control device location and orientation. The image is produced on the display to provide an attending physician with interactive control of the image from the magnet bore.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: August 14, 2001
    Assignee: General ElectricCompany
    Inventors: Robert David Darrow, Charles Lucian Dumoulin, Christopher Judson Hardy
  • Patent number: 6246896
    Abstract: An MRI system acquires NMR tracking data from a tracking coil imbedded in an ablation device which is guided by a physician using real time anatomic images produced from image data acquired by the MRI system. The same tracking coil is energized by an RF power source to deliver energy which ablates tissue after the device is guided into proper position.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: June 12, 2001
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Robert David Darrow
  • Patent number: 6211674
    Abstract: An imaging method and system generates images of non-planar portions of a three dimensional data point array wherein the non-planar portion corresponds to a non-planar object. The method includes selecting at least two different intermediate imaging planes, each selected plane including at least a portion of the object to be imaged, generating cross-sectional views perpendicular to each intermediate plane, selecting a viewing plane, projecting the cross-sectional views onto the viewing plane to generate transition value sets, and combining the transition value sets to generate values for each pixel in a display.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: April 3, 2001
    Assignee: General Electric Company
    Inventors: Harvey Ellis Cline, Christopher Judson Hardy, Charles Lucian Dumoulin
  • Patent number: 6201987
    Abstract: The present invention is capable of more accurately tracking an invasive device in a subject's body in the presence of eddy current inducing structures. Current patterns applied to the tracking system's transmit coils are modified to compensate for the effect of the eddy currents. The current supplied to the coils is a linear combination of the current needed to create the desired electromagnetic field in the region of interest; and one or more error terms. These terms are determined experimentally during system calibration and are mathematically modeled as a series of exponential functions having a given amplitude and time constant. The error terms in the current applied to the transmit coils cancel the magnetic fields created by eddy currents within the tracking region and result in an actual electromagnetic field which is close to the desired ideal electromagnetic field.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: March 13, 2001
    Assignee: General Electric Company
    Inventor: Charles Lucian Dumoulin
  • Patent number: 6198282
    Abstract: An MRI system receives scan parameters from an operator which define the prescribed pulse sequence to be used in acquiring image data. The amplitude and slew rate of gradient pulses in the pulse sequence are calculated based on their prescribed areas to have optimal duration without exceeding physiologic gradient slew rate limits and to produce the pulse area required by the scan parameters.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: March 6, 2001
    Assignee: General Electric Company
    Inventor: Charles Lucian Dumoulin
  • Patent number: 6175757
    Abstract: An invasive probe for mapping the walls of a lumen employs a real-time tracking means and a wall distance measurement means. As the probe is advanced within the lumen, the real-time tracking means provides three-dimensional coordinates of the probe's position and orientation. Concurrent with probe localization, the distance between the probe and the lumen walls is measured. Both the probe position and the wall distance measurement are sent to a data acquisition system which in turn provides a graphic or numeric display to the operator. Probe tracking can be performed with radio-frequency, magnetic resonance, ultrasonic techniques or the like. If desired, lumen wall distance measurements can be performed with magnetic resonance or ultrasound methods. Lumen wall distance measurements can also be performed with mechanical devices such as balloons and/or expanding structures.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: January 16, 2001
    Assignee: General Electric Company
    Inventors: Ronald Dean Watkins, Charles Lucian Dumoulin, Robert David Darrow, Christine Elise Dumoulin
  • Patent number: 6129667
    Abstract: An invasive probe for determining the morphological characteristics of walls of a lumen employs a real-time tracking means and an optical spectral measurement means. As the probe is advanced within the lumen, the real-time tracking means provides three-dimensional coordinates of the probe's position and orientation. Concurrent with probe localization, measurement of the spectral properties of the lumen wall are made by detecting the reflectance and/or absorption of light at the lumen wall. Both the probe position and the spectral measurement are sent to a data acquisition system which in turn provides an graphic or numeric display to the operator. Probe tracking can be performed with radio-frequency, magnetic resonance, ultrasonic techniques or the like. If desired, spectral measurements can be made in the visible, ultra-violet or infra-red spectral bands to provide optimized detection of chemical species of interest.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: October 10, 2000
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Robert David Darrow, Ronald Dean Watkins
  • Patent number: 6115485
    Abstract: Secondary data set information is incorporated into a primary data set (such as a digital image) retaining a desired dynamic range and retaining the original primary set data quality. The secondary data set information is `smuggled` into the least significant bits of the primary data set to result in an enhanced data set. If desired, the primary data word can be shifted toward the most significant bit. The enhanced data set may be viewed as if it were the original primary data set with existing playback devices, however it now includes additional `smuggled` information which may be played back in coordination with the primary data set information. One example is flow-direction information `smuggled` into an angiographic image. The least significant bits of the enhanced data words may be used to select the color map and color code the images. A user-adjustable intensity threshold can also be employed to select between color maps.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: September 5, 2000
    Assignee: General Electric Company
    Inventors: Charles Lucian Dumoulin, Robert David Darrow