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@ARTICLE{Ha:850241,
      author       = {Ha, Yonghyun and Choi, Chang-Hoon and Shah, N. J.},
      title        = {{D}evelopment and {I}mplementation of a {PIN}-{D}iode
                      {C}ontrolled, {Q}uadrature-{E}nhanced, {D}ouble-{T}uned {RF}
                      {C}oil for {S}odium {MRI}},
      journal      = {IEEE transactions on medical imaging},
      volume       = {37},
      number       = {7},
      issn         = {1558-254X},
      address      = {New York, NY},
      publisher    = {Institute of Electrical and Electronics Engineers,},
      reportid     = {FZJ-2018-04296},
      pages        = {1626 - 1631},
      year         = {2018},
      abstract     = {Sodium (23Na) MRI provides complementarycellular and
                      metabolic information. However, the intrinsicMR sensitivity
                      of 23Na is considerably lower comparedwith that of the
                      proton, making it difficult to measureMR-detectable sodium
                      signals. It is therefore importantto maintain the
                      signal-to-noise ratio (SNR) of the sodiumsignal as high as
                      possible. Double-tuned coils are oftenemployed in
                      combinationwith a 1H coil, providing structuralimages and B0
                      shimming capability. The double-tuned coildesign can be
                      achieved with the use of two geometricallydecoupled
                      coilswhoseB1 field directions are perpendicularto each
                      other. This can be used to design
                      quadrature-driven,single-nucleus coils to improve SNR, and
                      additionally, thiscoil can also be utilized as a
                      linear-driven double-resonantmode. Here,we have developed
                      and evaluateda quadratureenhanced,double-tuned coil. The
                      novel coil usesPIN-diode switches, inserted only in the loop
                      coil, toshift the resonance frequency between 1H and 23Na
                      sothat 23Na signals can be acquired in quadrature and
                      thecapability of using 1H function remains. Consequently,the
                      23Na SNR values obtained with the double-tunedcoil are
                      nearly $33\%$ and $17\%$ higher in comparison
                      withgeometrically identical single-tuned coils. SNR plots
                      alsoshow the superiority of double-tuned coil in 23Na.},
      cin          = {INM-4 / JARA-BRAIN},
      ddc          = {610},
      cid          = {I:(DE-Juel1)INM-4-20090406 / $I:(DE-82)080010_20140620$},
      pnm          = {573 - Neuroimaging (POF3-573)},
      pid          = {G:(DE-HGF)POF3-573},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29990262},
      UT           = {WOS:000437280500009},
      doi          = {10.1109/TMI.2017.2786466},
      url          = {https://juser.fz-juelich.de/record/850241},
}