Correction of motional artifacts in diffusion-weighted MR images using navigator echoes

Magn Reson Imaging. 1994;12(3):455-60. doi: 10.1016/0730-725x(94)92539-9.


Patient motion can seriously degrade the quality of diffusion-weighted MR images obtained using standard 2DFT imaging procedures. The main source of error arises from an MR signal phase-shift error which is proportional to the magnitude of the motion. A modified pulse sequence is proposed which uses the phase information from an additional spin echo to correct for patient motion. Application of this technique is demonstrated for a human brain study, which greatly improves the quantification of diffusion values from regions of brain tissue.

MeSH terms

  • Artifacts*
  • Brain / anatomy & histology
  • Humans
  • Magnetic Resonance Imaging / methods*
  • Movement