Fig. 7　Cervical nerve DRG T2 relaxation times in healthy individuals. (A) T2 relaxation times(ms) at each spinal level. The T2 relaxation times(ms) at each spinal level were 98.7±21.0, 103.2±15.7, 98.1±17.6, and 93.9±12.3 for C5, C6, C7, and C8 nerve roots, respectively. We observed no significant differences in the nerve root T2 values at each spinal level(p＜0.05) . (B) The T2 relaxation times(ms) for bilateral nerve roots at each spinal level(right side, left side, p value) . We also observed no significant differences between the left- and right-sided nerve roots: C5 nerve root 94.4±31.1, 103.1±8.9, p＝0.67, C6 nerve root 97.7±20.0, 108.7±11.3, p＝0.19, C7 nerve root 96.7±21.2, 99.4±17.8, p＝0.68, C8 nerve root 88.9±12.8, 99.1±11.8, p = 0.085. From Eguchi et al., modified with permission［18］