Improved Shim by Subject Head Positioning

  title={Improved Shim by Subject Head Positioning},
  author={Keith Arron Heberlein and Xiaoping Hu},
Introduction A large susceptability artifact arises from the air-tissue interface of the nasal cavity in the head. This region of large susceptability difference creates field distortions that typically cannot be corrected by shimming. For example, it is difficult to obtain proton NMR spectra from the inferior frontal lobe of the brain, whether by spectroscopic imaging (SI) or single voxel techniques (SVS). Often data from regions of the inferior frontal lobe in SI must be discarded due to the… CONTINUE READING

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Shimming High Field Magnets

MB Smith
  • 2000

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