Extent of hypoattenuation on CT angiography source images predicts functional outcome in patients with basilar artery occlusion.

Background And Purpose: Quantification of early ischemic changes (EIC) may predict functional outcome in patients with basilar artery occlusion (BAO). We tested the validity of a novel CT score, the posterior circulation Acute Stroke Prognosis Early CT score (pc-ASPECTS).

Methods: Pc-ASPECTS allots the posterior circulation 10 points.