FIG 2. MR images obtained 2 days after intravenous immunoglobulin therapy (7 days after onset).

A, -B, Axial diffusion-weighted MR images (echo-planar imaging; TR/TE, 7000/80; b 1000) show remarkable high signal intensity in the bilateral parietooccipital white matter and splenium of the corpus callosum.

C, -D, Axial FLAIR images (TR/TE/TI, 8002/127/2000) show slight high signal intensity in the bilateral deep white matter.

E, -F, Apparent diffusion coefficient (ADC) maps show distinct decrease of ADC value in the deep white matter.

G, -H, Contrast-enhanced T1-weighted images (gradient-refocused echo; TR/TE, 950/14; flip angle, 50) show no abnormal contrast enhancement in the meninges and white matter.