NMR imaging: image recovery under magnetic fields with large non-uniformities

Abstract

In the field of NMR imaging using selective excitation techniques, a procedure is described whereby image information can be recovered with acceptable fidelity in the presence of large magnetic field non-uniformities. It entails only the running of a reference uniform sample under the same conditions as the unknown and performing a kind of deconvolution of signals. By this means, a number of different kinds of distortion can be compensated, without requiring any detailed knowledge of the particular magnetic field non-uniformity involved.