Magnetic resonance imaging in inhomogeneous fields

  title={Magnetic resonance imaging in inhomogeneous fields},
  author={Charles L Epstein},
  journal={Inverse Problems},
  pages={753 - 780}
In this paper, we explain the principles underlying imaging with an inhomogeneous B0-field and show how SNR and SAR considerations place limits on the size of the relative field inhomogeneity. We explore problems of imaging with a background field that varies in both magnitude and direction, both with and without critical points. We give a simple geometric explanation for the difficulties that arise when attempting to use fields such that has a saddle point, and construct examples of fields…