Patents by Inventor Matthias L. Gebhardt

Matthias L. Gebhardt 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).

  • Parallel transmission RF pulse design with local SAR constraints
    Patent number: 8653818
    Abstract: A method of designing a parallel transmission radio frequency (RF) pulse for a magnetic resonance imaging (MRI) system includes compressing a model for a subject to be scanned by the MRI system into a plurality of voxel clusters, each voxel cluster defining a virtual observation point with a peak sensitivity to local specific absorption rate (SAR) for the voxel cluster, and defining the parallel transmission RF pulse based on an approximation of a minimization criterion having a local SAR component based on the peak sensitivity of each virtual observation point, the approximation comprising a weighted sum of the local SAR values for each virtual observation point.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: February 18, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Elfar Adalsteinsson, Joonsung Lee, Lawrence L. Wald, Matthias L. Gebhardt
  • PARALLEL TRANSMISSION RF PULSE DESIGN WITH LOCAL SAR CONSTRAINTS
    Publication number: 20120256626
    Abstract: A method of designing a parallel transmission radio frequency (RF) pulse for a magnetic resonance imaging (MRI) system includes compressing a model for a subject to be scanned by the MRI system into a plurality of voxel clusters, each voxel cluster defining a virtual observation point with a peak sensitivity to local specific absorption rate (SAR) for the voxel cluster, and defining the parallel transmission RF pulse based on an approximation of a minimization criterion having a local SAR component based on the peak sensitivity of each virtual observation point, the approximation comprising a weighted sum of the local SAR values for each virtual observation point.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 11, 2012
    Applicant: Siemens Aktiengesellschaft
    Inventors: Elfar Adalsteinsson, Joonsung Lee, Lawrence L. Wald, Matthias L. Gebhardt