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@ARTICLE{Niesen:272879,
      author       = {Niesen, Svenja and Veldmann, Marten and Ehses, Philipp and
                      Stöcker, Tony},
      title        = {{S}piral 3{DREAM} sequence for fast whole‐brain {B}1
                      mapping},
      journal      = {Magnetic resonance in medicine},
      volume       = {93},
      number       = {1},
      issn         = {1522-2594},
      address      = {New York, NY [u.a.]},
      publisher    = {Wiley-Liss},
      reportid     = {DZNE-2024-01295},
      pages        = {321 - 329},
      year         = {2025},
      abstract     = {This work demonstrates a new variant of the 3DREAM sequence
                      for whole-brain B 1 + $$ {\mathrm{B}}_1^{+} $$ mapping
                      employing a three-dimensional (3D) stack-of-spirals readout.
                      The spiral readout reduces the echo train length after the
                      STEAM preparation in order to overcome the significant
                      blurring in STE* images due to the decreasing STE* signal
                      with each excitation pulse.The 3DREAM sequence rapidly
                      acquires two contrasts to calculate whole-brain flip angle
                      maps. In the proposed spiral 3DREAM sequence, the Cartesian
                      readout scheme is replaced by an accelerated 3D
                      stack-of-spirals readout with a CAIPIRINHA sampling scheme.
                      Phantom experiments were conducted to compare flip angle
                      maps of the spiral 3DREAM sequence to a Cartesian 3DREAM
                      sequence, an actual flip-angle-imaging (AFI) sequence, the
                      dual-angle method, and the Bloch-Siegert shift method.
                      Afterwards, the results were validated in vivo acquiring
                      flip angle maps from five subjects.Flip angle maps of the
                      spiral 3DREAM sequences showed high agreement with the
                      reference methods both in phantom and in vivo experiments.
                      Blurring in STE* images and flip angle maps was reduced
                      compared to the Cartesian 3DREAM sequence.The spiral 3DREAM
                      sequence utilizes a fast readout minimizing the echo train
                      length of the imaging train. This reduces blurring in STE*
                      images as well as the total acquisition time and increases
                      the effective resolution of B 1 + $$ {\mathrm{B}}_1^{+} $$
                      maps.},
      keywords     = {Humans / Imaging, Three-Dimensional: methods / Brain:
                      diagnostic imaging / Phantoms, Imaging / Algorithms /
                      Magnetic Resonance Imaging: methods / Reproducibility of
                      Results / Brain Mapping: methods / Image Interpretation,
                      Computer-Assisted: methods / Image Enhancement: methods},
      cin          = {AG Stöcker / AG Reuter},
      ddc          = {610},
      cid          = {I:(DE-2719)1013026 / I:(DE-2719)1040310},
      pnm          = {354 - Disease Prevention and Healthy Aging (POF4-354)},
      pid          = {G:(DE-HGF)POF4-354},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:39219171},
      doi          = {10.1002/mrm.30282},
      url          = {https://pub.dzne.de/record/272879},
}