Figure 2: Magnetic resonance spectroscopy (MRS) of a healthy person (a): multiple sclerosis (MS) lesion (b) and normal-appearing white matter (NAWM) of the same patient (c) at TE of 144; there is mildly decreased NAA/Cr, decreased NAA/Cho, and increased Cho/Cr ratios in both MS plaque and NAWM in comparison with normal controls.