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@ARTICLE{Thulborn:136903,
      author       = {K. R. Thulborn and C. Ma and C. Sun and I. C. Atkinson and
                      T. Claiborne and R. Umathum$^*$ and S. M. Wright and Z.-P.
                      Liang},
      title        = {{SERIAL} transmit - parallel receive ({ST}x{PR}x) {MR}
                      imaging produces acceptable proton image uniformity without
                      compromising field of view or {SAR} guidelines for human
                      neuroimaging at 9.4 {T}esla.},
      journal      = {Journal of magnetic resonance},
      volume       = {293},
      issn         = {1090-7807},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {DKFZ-2018-01341},
      pages        = {145 - 153},
      year         = {2018},
      abstract     = {Non-uniform B1+ excitation and high specific absorption
                      rates (SAR) compromise proton MR imaging of human brain at
                      9.4 T (400.5 MHz). By combining a transmit/receive
                      surface coil array using serial transmission of individual
                      coils with a total generalized variation reconstruction of
                      images from all coils, acceptable quality human brain
                      imaging is demonstrated.B0 is shimmed using sodium MR
                      imaging (105.4 MHz) with a birdcage coil. Proton MR
                      imaging is performed with an excitation/receive array of
                      surface coils. The modified FLASH pulse sequence transmits
                      serially across each coil within the array thereby
                      distributing SAR in time and space. All coils operate in
                      receive mode. Although the excitation profile of each
                      transmit coil is non-uniform, the sensitivity profile
                      estimated from the non-transmit receive coils provides an
                      acceptable sensitivity correction. Signals from all coils
                      are combined in a total generalized variation (TGV)
                      reconstruction to provide a full field of view image at
                      maximum signal to noise (SNR) performance.High-resolution
                      images across the human head are demonstrated with
                      acceptable uniformity and SNR.Proton MR imaging of the human
                      brain is possible with acceptable uniformity at low SAR at
                      9.4 Tesla using this serial excitation and parallel
                      reception strategy with TGV reconstruction.},
      cin          = {E020},
      ddc          = {550},
      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:30012280},
      pmc          = {pmc:PMC6084804},
      doi          = {10.1016/j.jmr.2018.05.009},
      url          = {https://inrepo02.dkfz.de/record/136903},
}