Figure 4
Volume and first order features in the NAWM tracts. Box plots of volume (corrected by the total brain volume according to the proportional adjustment method), interquartile range of susceptibility (= 75th P-25th P [P = percentile]), mean absolute deviation (MAD), variance, entropy and uniformity (first-order statistics features) distributions in the NAWM tracts (5TE-QSM). CST and IFOF have the greatest volumes (red dashed lines); UF has the highest variability in range, MAD, and variance (blue dashed lines); CST showed lower entropy and higher uniformity (green dashed lines) resulting in more uniform texture despite its volume (NAWM = normal appearing white matter, TE = echo time, QSM = quantitative susceptibility mapping, AF = arcuate fasciculus, CST = cortico-spinal tract, FAT = frontal aslant tract, IFOF = inferior fronto-occipital fasciculus, OR = optic radiation, UF = uncinate fasciculus).
