Fig. 1.

First admission: (A-D) diffusion-weighted images (DWI) show acute infarction in the left insular cortex and corona radiata (A, B). Susceptibility vessel signs are seen in the left middle cerebral artery (MCA) on the T2*-weighted image (C). On magnetic resonance angiography (MRA), the left MCA is occluded at the proximal M1 segment (D). 2nd admission: (E-H) DWI shows acute infarction in the right insular cortex, caudate, and corona radiata (E, F). This T2*-weighted image shows the susceptibility vessel sign in the right MCA (G), and MRA shows that the right MCA is occluded at the proximal M1 segment (H).