Visual comparison of the inter-rater variability and automatic method in the segmentation of the left hippocampus. Comparison between automatic method in red, rater1 in yellow (expert) and rater2 in turquoise (non expert) for the segmentation of hippocampi, in an axial slice. Regions of intersection between borders are rater1∩auto in orange, rater2∩auto in purple, rater1∩rater2 in green and rater1∩rater2∩auto in white.