CAJ | 학술논문

目的采用CT血管造影(CT angiography,CTA)评估颅内椎基底动脉的血管变异,提高对颅内椎基底动脉各种变异的认识.方法回顾性分析435例CTA图像,数据由16层螺旋CT扫描仪采集,全部图像经最大密度投影和容积再现技术处理,对颅内椎基底动脉进行测量分析.结果在435例受试者中,双侧椎动脉颅内段(V4)对称183例(42.07％),不对称252例(57.93％);左侧V4段发育不良27例(6.21％),右侧36例(8.28％),共21例(4.83％)一侧V4段直接延续为同侧小脑后下动脉.椎基底动脉延长扩张2例(0.46％).窗式变异32例(7.36％),其中V4段3例(0.69％),汇合处10例(2.30％),基底动脉19例(4.37％).永存三叉动脉2例(0.46％).结论颅内椎基底动脉变异主要包括血管发育不良、椎基底动脉延长扩张、窗式变异以及永存三叉动脉.作为一种无创性血管成像方法,CTA可准确和直观地评估颅内椎基底动脉的解剖变异,为后颅窝手术的术前评估提供影像学指导.
목적 채용CT혈관조영(CT angiography,CTA)평고로내추기저동맥적혈관변이,제고대로내추기저동맥각충변이적인식.방법 회고성분석435례CTA도상,수거유16층라선CT소묘의채집,전부도상경최대밀도투영화용적재현기술처리,대로내추기저동맥진행측량분석.결과 재435례수시자중,쌍측추동맥로내단(V4)대칭183례(42.07％),불대칭252례(57.93％);좌측V4단발육불량27례(6.21％),우측36례(8.28％),공21례(4.83％)일측V4단직접연속위동측소뇌후하동맥.추기저동맥연장확장2례(0.46％).창식변이32례(7.36％),기중V4단3례(0.69％),회합처10례(2.30％),기저동맥19례(4.37％).영존삼차동맥2례(0.46％).결론 로내추기저동맥변이주요포괄혈관발육불량、추기저동맥연장확장、창식변이이급영존삼차동맥.작위일충무창성혈관성상방법,CTA가준학화직관지평고로내추기저동맥적해부변이,위후로와수술적술전평고제공영상학지도.
Objective To evaluate the valuations of the intracranial vertebrobasilar arteries using CT angiography (CTA) in order to improve the understanding of various variants in intracranial vertebrobasilar arteries.Methods The CTA images of 435 subjects were analyzed retrospectively.The data were collected by a 16-slice CT scanner.All the CTA images were processed technically by the maximum intensity projection and volume rendering.The intracranial vertebrobasilar arteries were measured and analyzed.Results Among the 435 subjects,bilateral intracranial vertebral arteries (V4) showed symmetry in 183 (42.07％) and dissymmetry in 252 (57.93％).Hypoplasia were found in 27 subjects (6.21％) on the left V4 segments and 36 (8.28％) on the right V4 segments,and a total of 21 (4.83％) were directly continued as the ipsilateral posterior inferior cerebellar arteries on the unilateral V4 segments.There were 2 subjects (0.46％) with vertebrobasilar dolichoectasia.There were 32 subjects (7.36％) had fenestration variation,3 of them (0.69％) were on the V4 segments,10 (2.30％) at the junctions,and 19 (4.37％) in the basilar arteries.Two subjects (0.46％) had persistent trigeminal arteries.Conclusions The variations of intracranial vertebrobasilar arteries mainly include angiodysplasia,vertebrobasilar dolichoectasia,fenestration variation,and persistent trigeminal artery.As a noninvasive vascular imaging method,CTA may accurately and visually assess the anatomic variation of intracranial vertebrobasilar artery,and provide imaging guidance for the preoperative evaluation of posterior fossa surgery.