Figure 1. DTI measurements of the sciatic nerve. The fused map (a) consisted of PD-weighted image (b) and FA map (c). The constriction injury, already visible on the FA map, was shown as four hypointense nodules on the PD-weighted image (thick arrow). Three ROIs were placed on both the constricted side (thick arrows) and its counterpart (thin arrow) on the sham-operated side. DTI, diffusiontensor imaging; FA, fractionalanisotropy; PD, proton density; ROI, region of interest.