Fig. 2　The number of publications per year reporting DTI and DW neurography and FA values and ADC values of the DTI parameters. (A) The number of publications per year reporting DTI and DW neurography of the lumbar nerves. In recent years, DTI reports have increased rapidly.(B) FA values and(C) ADC values of the DTI parameters from the spinal bifurcation to distal of the L5 nerve roots in 40 healthy subjects. From Eguchi et al., modified with permission［17］