Objective To explore the clinical manifestations of patients with vertebrobasilar dolichoectasia(VBD),and to analyze the diagnostic value of magnetic resonance imaging(MRI)and magnetic resonance angiography(MRA)in VBD.Methods 36 patients data with VBD diagnosed in Nanjing Lishui District People's Hospital from January 2018 to April 2022 were analyzed retrospectively.all patients underwent plain MRI scan and MRA examination.They were divided into symptomatic group and asymptomatic group according to their vascular clinical manifestations.The basic data and the characteristics of MRI and MRA images of the two groups were compared and analyzed.Results MRI sequence clearly showed different degrees of tortuosity,dilatation and prolongation of vertebrobasilar artery,with flow void low signal and partial high signal on the image.three-dimensional time-of-flight MRA(3D-TOF-MRA)map could show tortuous dilatation completely,and the original image combined with maximum signal intensity projection image could clearly show the relationship between tortuous vessels and surrounding tissues,and there were significant differences in basilar artery(BA)diameter,length,height,position score and vertebral artery(VA)diameter between the two groups(P<0.05);There was no significant difference in VA length between the two groups(P>0.05).Conclusion MRI and MRA can clearly show the shape of vertebrobasilar artery dilatation and its relationship with surrounding tissues,and provide reliable imaging basis for the diagnosis of VBD.
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