Table 1.

Mean (standard deviation) of the quantitative MR parameters and myelin content of four tissue types: normal appearing cortex (NAC), cortical lesions, normal appearing white matter (NAWM) and WM lesions. For all MR parameters and myelin content, P-value < 0.0001 for differences between NAC and cortical lesions, and for differences between NAWM and WM lesions.

	NAC	Cortical Lesion	NAWM	WM Lesion
T1 time (ms)	209 (27)	236 (26)	196 (18)	380 (88)
T2 time (ms)	64 (11)	91 (22)	56 (13)	121 (27)
Proton density M0 (r.u.)	3797 (114)	3835 (86)	3467 (88)	4005 (111)
Magnetization transfer ratio MTR (%)	7.47 (1.26)	7.09 (1.09)	12.82 (0.90)	6.16 (2.79)
Myelin content (% area)	7.96 (6.69)	1.96 (2.55)	74.18 (4.70)	27.55 (14.32)