Fig. 1From: A case of multiple Vertebrobasilar artery fenestration misdiagnosed as vertebral artery dissectionThe ‘double lumen’ sign and ‘intimal flap’ in CTA. CTA reconstruction images showing the ‘double lumen’ appearance at the V1 segment of the left vertebral artery (thick white arrows) (a-b). CTA axial images showing ‘double lumen’ sign and ‘intimal flap’ (thin white arrows) (c-d). CTA = Computed tomography angiographyBack to article page