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@ARTICLE{Choi:903251,
      author       = {Choi, Chang-Hoon and Hong, Suk-Min and Felder, Jorg and
                      Tellmann, Lutz and Scheins, Jurgen and Kops, Elena Rota and
                      Lerche, Christoph and Shah, N. J.},
      title        = {{A} novel {J}-shape antenna array for simultaneous
                      {MR}-{PET} or {MR}-{SPECT} imaging},
      journal      = {IEEE transactions on medical imaging},
      volume       = {41},
      number       = {5},
      issn         = {0278-0062},
      address      = {New York, NY},
      publisher    = {IEEE},
      reportid     = {FZJ-2021-04958},
      pages        = {1104 - 1113},
      year         = {2022},
      abstract     = {Simultaneous MR-PET/-SPECT is an emerging technology that
                      capitalises on the invaluable advantages of both modalities,
                      allowing access to numerous sensitive tracers and superior
                      soft-tissue contrast alongside versatile functional imaging
                      capabilities. However, to optimise these capabilities,
                      concurrent acquisitions require the MRI antenna located
                      inside the PET/SPECT field-of-view to be operated without
                      compromising any aspects of system performance or image
                      quality compared to the stand-alone instrumentation. Here,
                      we report a novel gamma-radiation-transparent antenna
                      concept. The end-fed J-shape antenna is particularly adept
                      for hybrid ultra-high field MR-PET/-SPECT applications as it
                      enables all highly attenuating materials to be placed
                      outside the imaging field-of-view. Furthermore, this unique
                      configuration also provides advantages in stand-alone MR
                      applications by reducing the amount of coupling between the
                      cables and the antenna elements, and by lowering the
                      potential specific absorption rate burden. The use of this
                      new design was experimentally verified according to the
                      important features for both ultra-high field MRI and the 511
                      keV transmission scan. The reconstructed attenuation maps
                      evidently showed much lower attenuation ( ∼15 $\%)$ for
                      the proposed array when compared to the conventional dipole
                      antenna array since there were no high-density components.
                      In MR, it was observed that the signal-to-noise ratio from
                      the whole volume obtained using the proposed array was
                      comparable to that acquired by the conventional array which
                      was also in agreement with the simulation results. The
                      unique feature, J-shape array, would enable simultaneous
                      MR-PET/-SPECT experiments to be conducted without unduly
                      compromising any aspects of system performance and image
                      quality compared to the stand-alone instrumentation.},
      cin          = {INM-4 / INM-11 / JARA-BRAIN},
      ddc          = {620},
      cid          = {I:(DE-Juel1)INM-4-20090406 / I:(DE-Juel1)INM-11-20170113 /
                      I:(DE-Juel1)VDB1046},
      pnm          = {5253 - Neuroimaging (POF4-525)},
      pid          = {G:(DE-HGF)POF4-5253},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34860648},
      UT           = {WOS:000790819300010},
      doi          = {10.1109/TMI.2021.3132576},
      url          = {https://juser.fz-juelich.de/record/903251},
}