Large matched perfusion defect in the brainstem and bilateral cerebella (red arrows). Additional perfusion defects in the bilateral thalami and occipital lobes, more apparent on TMAX than CBF likely to have some penumbra (orange arrows).

Only minimal patchy opacification of the basilar artery and bilateral PCAs as shown on panel A. Note that there is a lot of venous contamination in both PCA regions. On panel B, there is also little to no opacification of both distal vertebral arteries (right and left).