Fig. 12
From: Chinese specialist consensus on imaging diagnosis of intracranial arterial dissection
Images of a dissecting aneurysm. a-c Frontal, lateral and left anterior view demonstrate the ‘pearl-and-string’ sign (arrow) in the left vertebral artery. d-l Lesion (arrow) viewed by different high-resolution magnetic resonance image sequences and from different viewing angles. d-i Axial T1-weighted images (WI), contrast-enhanced T1WI, T2WI, perfusion weighted imaging, magnetization-prepared rapid gradient echo and 3D time of flight. j Saggital T2WI. k Coronal T2WI. l Magnetic resonance angiography