Figure 1. Brain MRI. (a) T1 image showing brain atrophy, more pronounced on the L side; (b) T2 FLAIR demonstrating the hyperintense genu of the corpus callosum, as well as scattered periventricular patchy and confluent white matter hyperintensities; (c) DWI showing diffusion restriction in the deep white matter; (d-f) T2 FLAIR visualizing T2 hyperintensities along the corticospinal tract from the internal capsule to the cerebral peduncles; (g-i) DWI showing subtle diffusion restriction along the corticospinal tract from the internal capsule to the cerebral peduncles. FLAIR: fluid-attenuated inversion recovery; DWI: diffusion weighted imaging; MRI: magnetic resonance imaging.