Detrending phase drift: A preprocessing step to improve the effectiveness of the UNFOLD technique

To improve the effectiveness of the UNFOLD technique in removing aliasing artifacts by detrending temporal phase drift in each voxel before the implementation of the UNFOLD technique. This is because linear and quadratic phase trends in temporal signal can shift and broaden aliasing peaks in the spectrum and cause the removal of aliasing artifacts by spectral filtering to be insufficient or even fail when minimal filtering of the spectrum is used.

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