Quantitative imaging assessment methods of vertebrobasilar dolichoectasia

Vertebrobasilar dolichoectasia(VBD ) can increase the risk of stroke. Significant expansion, elongation and tortuosity of the vertebrobasilar arteries are the main morphology manifestations of VBD. However, there is no consensus on the quantitative imaging assessment of VBD. Many studies showed that some quantitative parameters, such as basilar artery length and bending length, basilar angulation, vertebral tortuosity index can be used for the quantitative imaging assessment of VBD. Key words: Vertebrobasilar Insufficiency; Vertebral Artery; Basilar Artery; Cerebral Angiography; Magnetic Resonance Angiography; Tomography, X-Ray Computed