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@ARTICLE{Rietsch:131803,
      author       = {S. H. G. Rietsch and S. Orzada and A. Bitz$^*$ and M. Gratz
                      and M. Ladd$^*$ and H. H. Quick},
      title        = {{P}arallel transmit capability of various {RF} transmit
                      elements and arrays at 7{T} {MRI}.},
      journal      = {Magnetic resonance in medicine},
      volume       = {79},
      number       = {2},
      issn         = {0740-3194},
      address      = {New York, NY [u.a.]},
      publisher    = {Wiley-Liss},
      reportid     = {DKFZ-2018-00100},
      pages        = {1116 - 1126},
      year         = {2018},
      abstract     = {In this work, 22 configurations for remote radiofrequency
                      (RF) coil arrays consisting of different transmit element
                      designs for 7 Tesla (T) ultrahigh-field MRI are compared by
                      numerical simulations.Investigated transmit RF element types
                      are rectangular loops, micro striplines, micro striplines
                      with meanders, 250-mm shielded dipoles with meanders, and
                      lambda over two dipoles with and without shield. These
                      elements are combined in four different configurations of
                      circumferential RF body arrays with four or eight transmit
                      elements each. Comparisons included coupling behavior,
                      degrees of freedom offered by the individual transmit
                      patterns, and metrics like power and specific absorption
                      rate efficiency.Coupling between neighboring RF elements is
                      elevated (up to -7 dB) for all arrays with eight elements,
                      whereas it is below -25 dB for arrays with only four
                      elements. The cumulative sum of singular values points out
                      highest degrees of freedom for the central transversal,
                      reduced values in the central coronal, and minimum values in
                      the sagittal slice. Concerning power and SAR efficiency,
                      eight lambda over two dipoles are most advantageous.Among
                      the investigated remote arrays and parameters, a combination
                      of eight dipoles appears to be most favorable for potential
                      use in 7T body MRI. Magn Reson Med 79:1116-1126, 2018. ©
                      2017 International Society for Magnetic Resonance in
                      Medicine.},
      cin          = {E020},
      ddc          = {610},
      cid          = {I:(DE-He78)E020-20160331},
      pnm          = {315 - Imaging and radiooncology (POF3-315)},
      pid          = {G:(DE-HGF)POF3-315},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:28394080},
      doi          = {10.1002/mrm.26704},
      url          = {https://inrepo02.dkfz.de/record/131803},
}