Phase errors in multi-shot echo planar imaging.
Field inhomogeneity related phase errors in multi-shot echo planar imaging (EPI) are directly visualized and analyzed in the spatial frequency domain data or 'k-space'. The echo time shift (ETS) technique incrementally moves the position of the echo train and improves the phase error function by redistributing phase discontinuities away from the center of k-space.
Feinberg
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DA
New York University Medical Center, Radiology Department, New York 10016.
Oshio
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K
D016477:Artifacts; D017352:Echo-Planar Imaging / Q000379:methods*; D006801:Humans; D008961:Models, Structural