Correction of motional artifacts in diffusion-weighted MR images using navigator echoes
RJ Ordidge, JA Helpern, ZX Qing, RA Knight… - Magnetic resonance …, 1994 - Elsevier
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 …
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 …
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