多层螺旋CT在椎动脉起源异常诊断中的应用价值

Application of multislice spiral CT in evaluation of anomalous origin of vertebral artery

关键词:  椎动脉  异常  体层摄影术  X线计算机

Key words:  vertebral artery  variation  tomography  X-ray computed

摘要:

［目的］探讨多层螺旋CT（MSCT）在椎动脉起源异常诊断中的应用价值。［方法］2003年1月~2008年1月，400例临床可疑或诊断椎-基底动脉供血不足的患者接受椎动脉MSCT检查，对椎动脉CT原始图像进行重组。［结果］MSCT检出椎动脉起源异常17例（4.3%），其中左椎动脉起源于主动脉弓15例（9例合并左椎动脉行径异常，5例合并左椎动脉发育不良，2例合并单干椎动脉形成基底动脉）；左椎动脉起源于左颈总动脉1例，合并左椎动脉行径异常；右椎动脉起源于右颈总动脉1例，合并右椎动脉行径异常、右椎动脉发育不良和迷走右锁骨下动脉。［结论］MSCT是无创诊断椎动脉起源异常的优良方法。

Abstract:

［Objective］To evaluate the diagnostic value of anomalous origin of vertebral artery(VA) by multi-slice spiral computed tomography (MSCT).［Methods］Forty handred patients diagnosed or suspected as vertebral-basilar artery insufficiency underwent MSCT VA angiography from January 2003 to January 2008.The MSCT images of VA were post-prossed by reconstructions. ［Results］Anomalous origin of VA was incidentally found with MSCT in 17 patients(4.3%), including anomalous origin of the left VA from the aortic arch (n=15), in which 9 cases had the aberrant entrance position into the transverse foramen of the left VA, 5 cases had hypoplastic left VA ,and 2 cases had VA in one side that did not converged upon basilar artery and unilaterial VA fomed basilar artery, anomalous origin of the left VA from the left common carotid artery which had the aberrant entrance position into the transverse foramen of the left VA(n=1), anomalous origin of the right VA from the right common carotid artery which had the aberrant entrance position into the transverse foramen of the right VA, hypoplastic right VA, and aberrant right subclavian artery(n=1).These signs were better show by MSCT VA angiography. ［Conclusion］MSCT is a useful noninvasive imaging tool for the diagnosis of anomalous origin of vertebral artery.