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. 2019 Feb 1;186:286–300. doi: 10.1016/j.neuroimage.2018.11.006

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© 2018 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 2 — Comparison of the effects of motion correction and distortion correction between the FEAT and dHCP pipelines in representative subjects. (A) Comparison of volume-to-volume and slice-to-volume motion correction. Each row is the same volume from one subject before correction (Raw), after volume-to-volume motion correction used in the FEAT pipeline (FEAT), and after slice-to-volume motion correction used in the dHCP pipeline (dHCP). (B) Comparison of static distortion correction and estimated dynamic distortion correction. Each row is a standard deviation image as a proportion of the mean signal (i.e. ratio of temporal standard deviation to temporal mean) from one subject before correction (Raw), after static distortion correction used in the FEAT pipeline (FEAT), and after dynamic distortion correction used in the dHCP pipeline (dHCP). Improvements are seen predominantly at the brain surface perpendicular to the phase encode directions, especially in frontal and occipital polar regions.