Figure 7.

Brain magnetic resonance imaging of a 31-year-old man with stage 2 tubercular meningitis and vasculitis. (a–c) Diffusion-weighted images show acute infarct in the posterior circulation involving the right occipital, bilateral thalami, midbrain and left cerebellar hemisphere. (d) T1 postcontrast image shows thick basal leptomeningeal enhancement in the pre- and peripontine cisterns encasing the basilar artery (BA) (circle). (e and f) Three-dimensional time-of-flight noncontrast angiogram shows luminal narrowing of the BA and nonvisualization of the bilateral P1 and P2 segments on (f) maximum intensity projection image.