Objective To investigate the anatomical variations and travelling of basilar artery via volume computed tomography digital subtraction angiography (VCTDSA) and to investigate the relationship between the basilar artery bending and the development of intracranial segment of vertebral artery.Methods A total of 110 normal subjects underwent cerebral and cervical vessel VCTDSA were involved in the present study,and the images of basilar arteries were reconstructed by VR images.The development of vertebral artery,window variation and tortuosity of basilar artery,as well as the diameter and length of basilar artery were measured.The correlation between development of vertebral artery and tortuosity of basilar artery were analyzed.Results (1)In the 110cases,the rate of hypoplastic vertebral artery,tortuosity and window variation of basilar artery were 17.27％ (19/110),22.73％(25/110) and 2.73％(3/110),respectively.(2)The average length and diameter of basilar artery were(28.25±3.88)mm and (3.86±0.54)mm,respectively.(3)The tortuosity and window variation of basilar artery showed positive correlation with the development of intracranial segment of vertebral artery(P＜0.01,r=0.52).Conclusion VCTDSA could clearly show the anatomy and variability of basilar artery,and its anatomic valuable could act as the reference for the diagnosis of cerebral diseases in clinic.The hypoplasia of intracranial segment of vertebral artery could be correlate with tortuosity of basilar artery.%目的 运用容积CT数字减影血管成像(VCTDSA)研究基底动脉走行和变异,探讨基底动脉迂曲与椎动脉颅内段发育不良之间的关系.方法 观测2010年1月至2011年12月在重庆医科大学附属第一医院行VCTDSA检查、非脑卒中患者且头部或头颈VCTDSA检查未见病变者110例,在容积再现(VR)图像上观察双侧椎动脉颅内段发育情况、基底动脉有无迂曲、是否存在窗型变异,并分别测量基底动脉的长度与管径,同时对双侧椎动脉颅内段发育情况与基底动脉迂曲进行相关性分析.结果 (1)110例检查者中,椎动脉发育不良占17.27％(19/110)；基底动脉有迂曲占22.73％ (25/110)；基底动脉窗型变异占2.73％(3/110).(2)基底动脉平均长度为(28.25±3.88)mm,平均管径为(3.86±0.54)mm.(3)椎动脉颅内段发育不良与基底动脉迂曲呈正相关(P＜0.01,r=0.52).结论 VCTDSA能清楚显示基底动脉的解剖和变异,管腔及血管长度值可以为提供临床诊断脑血管疾病的参考.椎动脉颅内段发育不良与基底动脉迂曲的形成有关.
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