Fig 1.

A 48-year-old man with hypertension, hyperlipidemia, and smoking history presented with recurrent transient attacks of dizziness and diplopia for 10 months. A, At the level of trigeminal ganglion, T1WI shows slight hyperintense eccentric wall thickening of the BA compared with the temporal muscle (not shown). PDWI (B) and T2WI (C) show isointense vessel wall thickening. D, Postcontrast T1WI shows heterogeneous enhancement, suggesting that the atherosclerotic plaque was composed of a lipid-rich necrotic core. The BA-CSF border and the blood-intima border can be demarcated on T1WI (A), PDWI (B), T2WI (C), and postcontrast T1WI (D). The outlines of the BA lumen and outer wall boundary are shown on T1WI (E), PDWI (F), T2WI (G), and postcontrast T1WI (H).