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@ARTICLE{Choi:999149,
      author       = {Choi, Chang-Hoon and Webb, Andrew and Orzada, Stephan and
                      Kelenjeridze, Mikheil and Shah, N. Jon and Felder, Jorg},
      title        = {{A} {R}eview of {P}arallel {T}ransmit {A}rrays for
                      {U}ltra-{H}igh {F}ield {MR} {I}maging},
      journal      = {IEEE reviews in biomedical engineering},
      volume       = {17},
      issn         = {1937-3333},
      address      = {New York, NY},
      publisher    = {IEEE},
      reportid     = {FZJ-2023-01193},
      pages        = {351-368},
      year         = {2023},
      abstract     = {Parallel transmission (pTX) techniques are required to
                      tackle a number of challenges, e.g., the inhomogeneous
                      distribution of the transmit field and elevated specific
                      absorption rate (SAR), in ultra-high field (UHF) MR imaging.
                      Additionally, they offer multiple degrees of freedom to
                      create temporally- and spatially-tailored transverse
                      magnetization. Given the increasing availability of MRI
                      systems at 7 T and above, it is anticipated that interest in
                      pTX applications will grow accordingly. One of the key
                      components in MR systems capable of pTX is the design of the
                      transmit array, as this has a major impact on performance in
                      terms of power requirements, SAR and RF pulse design. While
                      several reviews on pTX pulse design and the clinical
                      applicability of UHF exist, there is currently no systematic
                      review of pTX transmit/transceiver coils and their
                      associated performance. In this paper, we analyze transmit
                      array concepts to determine the strengths and weaknesses of
                      different types of design. We systematically review the
                      different types of individual antennas employed for UHF,
                      their combination into pTX arrays, and methods to decouple
                      the individual elements. We also reiterate figures-of-merit
                      (FoMs) frequently employed to describe the performance of
                      pTX arrays and summarize published array designs in terms of
                      these FoMs.},
      cin          = {INM-4},
      ddc          = {570},
      cid          = {I:(DE-Juel1)INM-4-20090406},
      pnm          = {5253 - Neuroimaging (POF4-525) / DFG project
                      G:(GEPRIS)491111487 - Open-Access-Publikationskosten / 2025
                      - 2027 / Forschungszentrum Jülich (OAPKFZJ) (491111487)},
      pid          = {G:(DE-HGF)POF4-5253 / G:(GEPRIS)491111487},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {37022919},
      UT           = {WOS:001166967200013},
      doi          = {10.1109/RBME.2023.3244132},
      url          = {https://juser.fz-juelich.de/record/999149},
}