Patents by Inventor Willem M. Prins

Willem M. Prins 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: 9036884
    Abstract: A magnetic resonance system includes a magnetic resonance scanner having a multi-channel transmit coil or coil system and a magnetic resonance receive element; and a digital processor configured to perform an imaging process. The image process includes shimming the multi-channel transmit coil or coil system, acquiring a coil sensitivity map for the magnetic resonance receive element using the multi-channel transmit coil or coil system, acquiring a magnetic resonance image using the magnetic resonance receive element and the shimmed multi-channel transmit coil or coil system, and performing an intensity level correction on the acquired magnetic resonance image using the coil sensitivity map to generate a corrected magnetic resonance image.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: May 19, 2015
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Paul R. Harvey, Thomas H. Rozijn, Gerrit H. Ijperen, Willem M. Prins, Wilhelmus R. M. Mens, Franciscus J. M. Benschop
  • Publication number: 20120163692
    Abstract: A magnetic resonance system comprises: a magnetic resonance scanner including a multi-channel transmit coil or coil system and a magnetic resonance receive element; and a digital processor configured to perform an imaging process including shimming the multi-channel transmit coil or coil system, acquiring a coil sensitivity map for the magnetic resonance receive element using the multi-channel transmit coil or coil system, acquiring a magnetic resonance image using the magnetic resonance receive element and the shimmed multi-channel transmit coil or coil system, and performing an intensity level correction on the acquired magnetic resonance image using the coil sensitivity map to generate a corrected magnetic resonance image.
    Type: Application
    Filed: August 5, 2010
    Publication date: June 28, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Paul R. Harvey, Thomas H. Rozijn, Gerrit H. Ijperen, Willem M. Prins, Wilhelmus R. M. Mens, Franciscus J. M. Benschop
  • Publication number: 20120161766
    Abstract: A magnetic resonance method comprising: loading a subject into a magnetic resonance scanner; with the subject loaded into the magnetic resonance scanner, acquiring B1 maps (72) for a plurality of radio frequency transmit channels of the magnetic resonance scanner; shimming the plurality of radio frequency transmit channels and setting a radio frequency transmit power for the shimmed plurality of radio frequency transmit channels using the acquired B 1 maps to generate optimized amplitude and phase parameters (98) for the plurality of radio frequency transmit channels; acquiring magnetic resonance imaging data of the subject loaded into the magnetic resonance scanner including exciting magnetic resonance by operating the plurality of radio frequency transmit channels using the optimized amplitude and phase parameters; generating a reconstructed image from the acquired magnetic resonance imaging data; and displaying the reconstructed image.
    Type: Application
    Filed: August 5, 2010
    Publication date: June 28, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Paul R. Harvey, Ronaldus F.J. Holthuizen, Willem M. Prins, Franciscus J.M. Benschop
  • Patent number: 6424152
    Abstract: A magnetic resonance imaging facilitates a pre-compensating phase encoding of spuriously generated magnetizations. The method includes generating a preparatory excitation of spins represented upon an RF-excitation line, applying subsequently a temporary magnetic compensation gradient as represented along a phase-encoding axis, generating subsequently an RF excitation pulse as represented upon the RF-excitation line, applying subsequent to the RF excitation pulse, and before an acquisition interval for receiving magnetic resonance signals, a phase-encoding gradient as represented along the phase-encoding axis. The phase-encoding gradient is substantially the same magnitude as, and opposite in direction relative to, the direction of the temporary magnetic compensation gradient. The last step includes receiving magnetic resonance signals during the acquisition interval as represented along the RF-excitation line.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: July 23, 2002
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Willem M. Prins, Gerardus N. Peeren
  • Patent number: 5068610
    Abstract: An MRI method and device for fast determination of the transverse relaxation time constant T2 utilizes the fact that this time constant introduces asymmetry into all magnetic resonance echo signals (::exp(-t/T2) enabling determination of the time constant T2 from the asymmetry of the echo signals. During the determination of a spin density distribution the value of the time constant T2 can be determined for each pixel. After Fourier transformation of the resonance signal, integration of the imaginary terms is performed (in the coordinate direction of the measuring gradient). The quotient of the current integral and the real term of the associated pixel is an accurate measure of the time constant T2 in the relevant pixel.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: November 26, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Antoon F. Mehlkopf, Willem M. Prins