Elimination of Nyquist ghosts in MRI by using fast linogram imaging

J Magn Reson Imaging. 1997 Nov-Dec;7(6):1166-9. doi: 10.1002/jmri.1880070634.

Abstract

Timing inaccuracies between the even and odd echoes lead to the formation of Nyquist ghosts in conventional (blipped) echo-planar imaging (EPI). A fast radial scanning method based on the linogram sampling geometry was designed and implemented. No ghosting effects are seen with this scheme, and correction for timing inaccuracies is performed using simple postprocessing steps before reconstruction.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Artifacts
  • Echo-Planar Imaging / methods*
  • Models, Theoretical