From the case:
Bilateral A1 fenestration
Coronal C+ arterial phase

Incidental note of bilateral A1 segment fenestration.
From the case:
Bilateral A1 fenestration
Coronal C+ arterial phase

Zoomed image showing bilateral fenestrated A1 segments.
Case Discussion
Incidental bilateral fenestration of the A1 segments of the anterior cerebral artery.