Fig. 1From: Chinese specialist consensus on imaging diagnosis of intracranial arterial dissectionMagnetic resonance images showing an intimal flap in a left vertebral artery dissection. a A T2-weighted image showing a dilated left vertebral artery, with an increased external diameter and hyperintense signal caused by a linear intimal flap (arrow) in the vessel lumen. b A contrast-enhanced 3D black-blood T1-weighted image showing significant enhancement of the intimal flap (arrow) and the wall of the left vertebral arteryBack to article page