Fig. 3　Tractography of the lumbar nerves and DTI parameters. (A) Tractography of the lumbar nerves in healthy volunteers. L3, L3 nerve; L4, L4 nerve; L5, L5 nerve; S1, S1 nerve.(B) Tractography of the lumbar nerves of a patient with right L5 foraminal stenosis. The arrow indicates the tract of the right L5 nerve disruption in the foramen.(C) FA value and(D) ADC value result. The red bars indicate the entrapped side and white bars indicate the intact side. The FA values were significantly decreased (p＜0.001) and the ADC values were significantly increased(p＜0.001) in both the proximal and distal sides of the foramen, compared to the intact side. From Eguchi et al., modified with permission［17］