Patents by Inventor Eddy B. Boskamp

Eddy B. Boskamp 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: 7936170
    Abstract: A radio frequency (RF) coil for a magnetic resonance imaging (MRI) system includes a first end ring section containing a plurality of openings and a second end ring section containing a plurality of openings. A plurality of rungs is disposed between the first end ring section and the second end ring section. Each rung has a first end connected to the first end ring section and a second end connected to the second end ring section. Each rung can also include a plurality of openings. The openings in the end rings and rungs reduces eddy currents and improves RF performance of the RF coil.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: May 3, 2011
    Assignee: General Electric Co.
    Inventors: Saikat Saha, Eddy B. Boskamp
  • Patent number: 7692427
    Abstract: A RF transmit coil decoupling circuit in a parallel drive configuration comprises a power amplifier and an output matching network to shim the B1 field in response to inhomogeneities therein. The separate coil segments in a transmit array are effectively decoupled from each other despite inherent mutual inductance between coil segments by the decoupling circuit. The output matching network forms a high impedance block seen by the coil elements, while it provides a load line impedance at the output of the power amplifier. The transmission line transformer in the output matching network suppresses higher order harmonics for clearer RF wave forms. It also dampen the Q factor of the output matching network allowing stable operation with a series tuned coil element.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: April 6, 2010
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Wonje Lee, Krishna N. Kurpad, Eddy B. Boskamp
  • Publication number: 20100033185
    Abstract: A radio frequency (RF) coil for a magnetic resonance imaging (MRI) system includes a first end ring section containing a plurality of openings and a second end ring section containing a plurality of openings. A plurality of rungs is disposed between the first end ring section and the second end ring section. Each rung has a first end connected to the first end ring section and a second end connected to the second end ring section. Each rung can also include a plurality of openings. The openings in the end rings and rungs reduces eddy currents and improves RF performance of the RF coil.
    Type: Application
    Filed: August 8, 2008
    Publication date: February 11, 2010
    Applicant: General Electric Company
    Inventors: Saikat Saha, Eddy B. Boskamp
  • Patent number: 7449888
    Abstract: The present invention is directed to a method and apparatus of multi-directional acceleration for parallel imaging. An RF coil assembly is constructed to have a plurality of RF coils arranged in axial and tangential direction for image data acquisition with acceleration in at least two dimensions.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: November 11, 2008
    Assignees: General Electric Company, The Texas A&M University System, A Texas State Agency
    Inventors: Nabeel M. Malik, Eddy B. Boskamp, John E. Lorbiecki, Scott A. Lindsay
  • Patent number: 7309989
    Abstract: A system wirelessly supplies electrical power to an RF coil and an analog-to-digital converter (ADC) for an MRI system. The system supplies power to at least operate the RF coil and ADC without the use of a battery and without use of a wired connection external to the bore of the magnet.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: December 18, 2007
    Assignee: General Electric Company
    Inventors: Eddy B. Boskamp, Ronald D. Watkins, Glen P. Koste
  • Patent number: 7285957
    Abstract: An RF coil assembly is presented that incorporates balun networks to eliminate standing waves from cables used to apply a voltage to multiple drive ports of the coil. Each drive port is driven by an applied voltage that is shifted 90 degrees in the tangential direction. Further, all drive ports are located on one end-ring of the coil, e.g. the superior end-ring. The inequality of the efficiency of the drive ports is reduced such that a substantially circular polarization in the volume of the coil is maintained. The present invention reduces asymmetrical loading by a patient as a result of patient asymmetry and patient contact with the opposite end-ring of the coil that normally negatively affects circular polarization and conventional coil configurations.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: October 23, 2007
    Assignee: General Electric Company
    Inventors: Eddy B. Boskamp, Armen Kocharian, LeRoy Blawat
  • Patent number: 7173425
    Abstract: An RF coil assembly is presented that incorporates balun networks to eliminate standing waves from cables used to apply a voltage to multiple drive ports of the coil. Each drive port is driven by an applied voltage that is shifted 90 degrees in the tangential direction. Further, all drive ports are located on one end-ring of the coil, e.g. the superior end-ring. The inequality of the efficiency of the drive ports is reduced such that a substantially circular polarization in the volume of the coil is maintained. The present invention reduces asymmetrical loading by a patient as a result of patient asymmetry and patient contact with the opposite end-ring of the coil that normally negatively affects circular polarization and conventional coil configurations.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: February 6, 2007
    Assignee: General Electric Company
    Inventors: Eddy B. Boskamp, Armen Kocharian, Leroy Blawat
  • Patent number: 7109712
    Abstract: A method and apparatus are provided which reduce coupling between a Z-axis gradient coil and an rf coil in magnetic resonance imaging systems and an rf shield disposed between the Z-axis gradient coil and the remaining gradient coils. The reduction in coupling is accomplished by novel windings of conductor forming the Z-axis gradient coil.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: September 19, 2006
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Eddy B. Boskamp
  • Patent number: 7088100
    Abstract: An RF coil assembly is presented that incorporates balun networks to eliminate standing waves from cables used to apply a voltage to multiple drive ports of the coil. Each drive port is driven by an applied voltage that is shifted 90 degrees in the tangential direction. Further, all drive ports are located on one end-ring of the coil, e.g. the superior end-ring. The inequality of the efficiency of the drive ports is reduced such that a substantially circular polarization in the volume of the coil is maintained. The present invention reduces asymmetrical loading by a patient as a result of patient asymmetry and patient contact with the opposite end-ring of the coil that normally negatively affects circular polarization and conventional coil configurations.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: August 8, 2006
    Assignee: General Electric Company
    Inventors: Eddy B. Boskamp, Armen Kocharian, LeRoy Blawat
  • Patent number: 6952100
    Abstract: A magnetic resonance imaging assembly is provided. The assembly includes a magnet assembly defining a scanning bore along a z-direction. The assembly further includes a surface coil assembly positioned within the scanning bore. The surface coil assembly receives an imaging field. The surface coil assembly comprises a first surface coil positioned along the z-direction. The first surface coil is induced with a first coil current comprised of a first coil amplitude and a first coil phase. The surface coil assembly includes a second surface coil positioned along said z-direction. The second surface coil is induced with a second coil current comprised of a second coil amplitude and a second coil phase. The second coil phase is varied from the first coil phase to correct asymmetries within the imaging field.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: October 4, 2005
    Assignee: GE Medical Systems Global Technology, Inc.
    Inventors: Graeme C. McKinnon, Eddy B. Boskamp, Shumin Wang
  • Patent number: 6885194
    Abstract: A method and apparatus are provided which reduce coupling between a Z-axis gradient coil and an rf coil in magnetic resonance imaging systems and an rf shield disposed between the Z-axis gradient coil and the remaining gradient coils. The reduction in coupling is accomplished by novel windings of conductor forming the Z-axis gradient coil.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: April 26, 2005
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Eddy B. Boskamp
  • Publication number: 20030210049
    Abstract: A method and apparatus are disclosed for combining the respective readout signals for a loop and butterfly coil pair of a quadrature phased array used for magnetic resonance imaging. The technique used to combine the signals introduces a 180 degree phase shift, or multiple thereof, to the loop coil signal, thereby allowing the loop coil signal to be decoupled from other loop coil signals by a low input impedance preamplifier in series with the signal.
    Type: Application
    Filed: May 8, 2002
    Publication date: November 13, 2003
    Inventors: Eddy B. Boskamp, Ceylan Celil Guclu, Ricardo Becerra
  • Publication number: 20030206017
    Abstract: A method and apparatus are provided which reduce coupling between a Z-axis gradient coil and an rf coil in magnetic resonance imaging systems and an rf shield disposed between the Z-axis gradient coil and the remaining gradient coils. The reduction in coupling is accomplished by novel windings of conductor forming the Z-axis gradient coil.
    Type: Application
    Filed: May 3, 2002
    Publication date: November 6, 2003
    Inventor: Eddy B. Boskamp
  • Publication number: 20030206019
    Abstract: The present invention provides a system and method wirelessly transmitting MR signals from receive coils of an RF coil assembly to a remotely located receiver system. By utilizing wireless telemetry, ghosting, SNR problems, and standing waves on shields typically associated with cabled receive coils are avoided. Furthermore, by incorporating a rechargeable battery in place of DC cables, the coaxial cable conducting large currents can be eliminated. The present invention incorporates a transmitter that transmits a modulated MR signal to a receiver at the end of the bore of the magnet of the MRI system. Modulating the MR signals with a carrier frequency enables wireless transmission of the modulated signal to the remote receiver. Preferably, the modulated signal is transmitted using a 900 MHz carrier frequency. The receiver then demodulates the received signal and transmits the resulting signal to a system control for subsequent processing and image reconstruction.
    Type: Application
    Filed: May 2, 2002
    Publication date: November 6, 2003
    Inventor: Eddy B. Boskamp
  • Patent number: 6639406
    Abstract: A method and apparatus are disclosed for combining the respective readout signals for a loop and butterfly coil pair of a quadrature phased array used for magnetic resonance imaging. The technique used to combine the signals introduces a 180 degree phase shift, or multiple thereof, to the loop coil signal, thereby allowing the loop coil signal to be decoupled from other loop coil signals by a low input impedance preamplifier in series with the signal.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: October 28, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Eddy B. Boskamp, Ceylan Celil Guclu, Ricardo Becerra
  • Patent number: 6538442
    Abstract: A combination gradient coil/RF shield is provided for magnetic resonance imaging systems. The coil may be adapted from any of the existing gradient coil structures, but is preferably an X-axis or Y-axis coil, with an inner Z-axis coil being inherently decoupled from the RF magnetic field due to its design. Capacitive circuits are provided between conductive paths of the selected gradient coil to adapt the gradient coil to the RF frequencies used during operation, such as 64 MHz. The technique permits the gradient coil assembly to be affectively moved closer to the patient while providing an enhanced distance between the RF coil and the RF shield defined by the adapted gradient coil.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: March 25, 2003
    Assignee: GE Medical Systems Global Technology Company
    Inventor: Eddy B. Boskamp
  • Patent number: 6534983
    Abstract: A multi-channel phased array coil for use in a magnetic resonance (MR) system is disclosed herein. The phased array coil includes N coils configured in an array, each of the N coils having a geometric shape and overlapping with (N−1) coils to form an overlap area within the array. The geometric shape of each of the coils and the overlap area are configured to cause a mutual inductance between every pair of the coils to be less than 10 percent of the self-inductance of each of the N coils. At least four coils are provided in the phased array coil.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: March 18, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Eddy B. Boskamp, Shizhe Li, Harvey E. Cline, Randy O. Giaquinto
  • Patent number: 6522144
    Abstract: An RF shielding technique is provided for open MRI systems. The RF shield includes a first portion disposed over a gradient field generating set, and a skirt-like second portion that wraps around lateral structures, such as the primary magnet and support. The two portions are joined to one another to form an integral RF shield that limits loss of RF energy both through the gradient field elements and through the primary magnet and support structures.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: February 18, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Eddy B. Boskamp
  • Patent number: 6498947
    Abstract: A technique is disclosed for shielding rf magnetic fields in MRI systems. An rf shield is embedded in a gradient coil structure including X-, Y- and Z-axis coils. The rf shield is positioned between an inner gradient coil which is inherently decoupled from the rf field, and the remaining coils which require rf shielding. The inner gradient coil may be a Z-axis coil wound as a solenoid, the field of which is generally orthogonal with respect to the rf magnetic field. The rf shield is thereby placed at an enhanced distance from the rf coil, providing greater efficiency and permitting energy levels to be reduced to obtain the desired rf magnetic field strength.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: December 24, 2002
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Eddy B. Boskamp, Richard P. Mallozzi, William A. Edelstein
  • Publication number: 20020120191
    Abstract: A technique is disclosed for shielding rf magnetic fields in MRI systems. An rf shield is embedded in a gradient coil structure including X-, Y- and Z-axis coils. The rf shield is positioned between an inner gradient coil which is inherently decoupled from the rf field, and the remaining coils which require rf shielding. The inner gradient coil may be a Z-axis coil wound as a solenoid, the field of which is generally orthogonal with respect to the rf magnetic field. The rf shield is thereby placed at an enhanced distance from the rf coil, providing greater efficiency and permitting energy levels to be reduced to obtain the desired rf magnetic field strength.
    Type: Application
    Filed: February 23, 2001
    Publication date: August 29, 2002
    Inventors: Eddy B. Boskamp, Richard P. Mallozzi, William A. Edelstein