“…Reader 3 showed the most pronounced amelioration from "fair" before to "good" diagnostic predictiveness after BA attenuation measurements. Coding I=0, 1 vs. 2="no" and "don't know" vs. "yes" regarding presence of BAO, coding II=0 vs. 1, 2="no" vs. "don't know" and "yes" regarding presence of BAO PFA posterior fossa artifacts, BA basilar artery, AUC area under curve, ROI region of interest Moreover, many patients with BAO are primarily admitted to community hospitals without a specialized stroke unit or neurologists on-call [17,18], and symptoms of posterior circulation stroke might be misinterpreted or missed [19].…”