Serial Diffusion Tensor Imaging of the Optic Radiations after Acute Optic Neuritis

Table 2

Average (±SD) baseline and annualised change in optic radiation fractional anisotropy (FA), axial diffusivity (AD), radial diffusivity (RD), and mean diffusivity (MD) for healthy controls (HC) and optic neuritis (ON) groups.

Parameter	Group	Baseline		Annualised change (%)
FA	HC	0.53 ± 0.03		−0.51 ± 0.50
	ON	0.51 ± 0.04		−2.60 ± 0.53
AD (10^−3 mm^2s^−1)	HC	1.25 ± 0.05		0.71 ± 0.33
	ON	1.26 ± 0.06		0.08 ± 0.26
RD (10^−3 mm^2s^−1)	HC	0.50 ± 0.03		1.30 ± 0.48
	ON	0.53 ± 0.05		2.82 ± 0.61
MD (10^−3 mm^2s^−1)	HC	0.75 ± 0.03		0.96 ± 0.31
	ON	0.77 ± 0.05		1.35 ± 0.37