TABLE 2:

Mean values (± SD) for absolute and relative fractional anisotropy and coefficient D_av in the three groups of lesions of increasing hypointensity on the T1-weighted images

	FA	Dav (×10−3 mm2/s)	ΔFA
T1 isointense (n = 25)	0.26 ± 0.07	1.29 ± 0.17	19 ± 4
T1 mildly hypointense (n=26)	0.21 ± 0.06	1.54 ± 0.31	23 ± 6
T1 severely hypointense (n=25)	0.19 ± 0.06	1.80 ± 0.32	36 ± 4

Note.—FA indicates fractional anisotropy; D_av, averaged diffusivity; ΔFA, percentage FA variation in the lesion, obtained in relation to a symmetric normal appearing white matter area in the contralateral hemisphere.