Fig. 2

Brain magnetic resonance imaging on admission (a-e) and at 30 days after admission (f). T2-weighted images (a) and fluid-attenuated inversion recovery images (b) show hyperintense lesions in the left frontal white matter. These lesions were hypointense on T1-weighted images (c). There was no enhancement on gadolinium-enhanced T1-weighted images (d). Diffusion-weighted images (DWI) demonstrated a hyperintense lesion in the margin of the left frontal white matter (e). Arterial spin labeling revealed hyperperfusion in the DWI hyperintense lesion (f)