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PARALLEL TRANSMISSION RF PULSE DESIGN WITH LOCAL SAR CONSTRAINTS

  • US 20120256626A1
  • Filed: 04/08/2011
  • Published: 10/11/2012
  • Est. Priority Date: 04/08/2011
  • Status: Active Grant
First Claim
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1. A method of designing a parallel transmission radio frequency (RF) pulse for a magnetic resonance imaging (MRI) system, the method comprising:

  • 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 local SAR values for the virtual observation points.

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