Pattern of white matter involvement in GRN for the stages defined by CDR®+NACC FTLD global scores. FA indexes are reported on the left side of the figure, while MD on the right. The color map indicates the percentile corresponding to the mean w-scores in each group (GRN ≤0.5/≥1: n = 130/30), when these were statistically abnormal (i.e. significantly different from 0, t-test) when compared to controls (n = 240).