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B0 shimming for in vivo magnetic resonance spectroscopy: Experts' consensus recommendations.

  • Juchem C Departments of Biomedical Engineering and Radiology, Columbia University, New York, New York.
  • Cudalbu C Centre d'Imagerie Biomedicale (CIBM), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • de Graaf RA Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut.
  • Gruetter R Laboratory for Functional and Metabolic Imaging, Center for Biomedical Imaging, Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland.
  • Henning A Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas.
  • Hetherington HP Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania.
  • Boer VO Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark.
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  • 2020-06-30
Published in:
  • NMR in biomedicine. - 2020
B0 magnetic field
homogenization
shimming
spherical harmonic functions
English Magnetic resonance spectroscopy (MRS) and spectroscopic imaging (MRSI) allow the chemical analysis of physiological processes in vivo and provide powerful tools in the life sciences and for clinical diagnostics. Excellent homogeneity of the static B0 magnetic field over the object of interest is essential for achieving high-quality spectral results and quantitative metabolic measurements. The experimental minimization of B0 variation is performed in a process called B0 shimming. In this article, we summarize the concepts of B0 field shimming using spherical harmonic shimming techniques, specific strategies for B0 homogenization and crucial factors to consider for implementation and use in both brain and body. In addition, experts' recommendations are provided for minimum requirements for B0 shim hardware and evaluation criteria for the primary outcome of adequate B0 shimming for MRS and MRSI, such as the water spectroscopic linewidth.
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  • English
Open access status
bronze
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https://sonar.ch/global/documents/194062
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