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. 2022 Mar 16;13:831386. doi: 10.3389/fneur.2022.831386

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Copyright © 2022 Ouyang, Kang, Liu, Hou, Fang, Xie and Liu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Example of a patient with BAO in our study. We rated CT angiography (CTA) source images (CTA-SI) (upper row) posterior circulation Acute Stroke Prognosis Early CT Score (pc-ASPECTS) score 6 (hypoattenuation left PCA territory, left cerebellum, midbrain) and follow-up non-contrast CT (NCCT) (lower row) pc-ASPECTS score 5 (additional ischemic change left thalamus).