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@ARTICLE{Orzada:167633,
      author       = {S. Orzada$^*$ and T. Fiedler$^*$ and H. H. Quick and M.
                      Ladd$^*$},
      title        = {{L}ocal {SAR} compression algorithm with improved
                      compression, speed, and flexibility.},
      journal      = {Magnetic resonance in medicine},
      volume       = {86},
      number       = {1},
      issn         = {1522-2594},
      address      = {New York, NY [u.a.]},
      publisher    = {Wiley-Liss},
      reportid     = {DKFZ-2021-00467},
      pages        = {561-568},
      year         = {2021},
      note         = {#EA:E020#LA:E020# / 86(1):561-568},
      abstract     = {Local specific absorption rate (SAR) compression algorithms
                      are essential for enabling online SAR monitoring in parallel
                      transmission. A better compression resulting in a lower
                      number of virtual observation points improves speed of SAR
                      calculation for online supervision and pulse design.An
                      iterative expansion of an existing algorithm presented by
                      Lee et al is proposed in this work. The original algorithm
                      is used within a loop, making use of the virtual observation
                      points from the previous iteration as the starting
                      subvolume, while decreasing the overestimation with each
                      iteration. This algorithm is evaluated on the SAR matrices
                      of three different simulated arrays.The number of virtual
                      observation points is approximately halved with the new
                      algorithm, while at the same time the compression time is
                      reduced with speed-up factors of up to 2.5.The new algorithm
                      improves the original algorithm in terms of compression rate
                      and speed.},
      keywords     = {MRI (Other) / SAR (Other) / VOP compression (Other) / VOPs
                      (Other) / local SAR (Other)},
      cin          = {E020},
      ddc          = {610},
      cid          = {I:(DE-He78)E020-20160331},
      pnm          = {315 - Bildgebung und Radioonkologie (POF4-315)},
      pid          = {G:(DE-HGF)POF4-315},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:33634530},
      doi          = {10.1002/mrm.28739},
      url          = {https://inrepo02.dkfz.de/record/167633},
}