Fig. 4.

Gray matter and white matter segmentation obtained using Freesurfer software tools without manual editing and applied on MRI scans obtained from 5-year-old children (Theys et al., 2014). Although image quality was good (A), systematic errors were found in segmentation near the pial surface (red arrows), in subcortical regions (orange arrows) and in cerebellum (blue arrows). Segmentation in Freesurfer is highly sensitive to motion as it is already degraded in images with mild motion artifact (B). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)