A Comparision of CT Angiography and High Resolution-MRI Vessel Wall Imaging of Vertebrobasilar Dolichoecta-sia

doi:10.3969/j.issn.1673-5765.2018.04.010

Abstract

Abstract:

Objective To investigate the role of high-resolution magnetic resonance imaging (HR-MRI) in the diagnosis of vertebrobasilar dolichoectasia, and to compare HR-MRI vascular wall imaging sequence with computed tomography angiography (CTA). Methods The imaging and clinical data of 25 patients who were diagnosed with vertebrobasilar dolichoectasia and underwent CT/CTA as well as HR-MRI during hospitalization during Feb. 2014 to Sep. 2015 were analyzed retrospectively. The study aimed to compare CT/CTA and HR-MRI according to the established criteria and explore the further value of HR-MRI vessel wall imaging. Results Comparison of CTA and HR-MRI revealed very good consistency of the measured diameter at mid-pons [intraclass correlation coefficient (ICC)=0.913, P <0.001], maximum diameter (ICC=0.951, P <0.001) and length of the BA (ICC=0.929, P <0.001). The consistency intensity of CTA and HRMRI was stronger concerning the lateral position [weighted kappa coefficient=0.773, 95% confidence interval (CI) 0.606-0.941, P <0.001]. The length of the intracranial segment of the vertebral artery can be accurately measured by HR-MRI, which was (32.02±6.29) mm on the left side and (36.66±6.76) mm on the right side. There were 5 patients combined with basilar artery plaque and 2 patients with vertebral artery dissection were detected by HR-MRI. Conclusion CT/CTA and HR-MRI demonstrate a very good consistency and reproducibility in the diagnosis of VBD. As a non-invasive examination, HR-MRI has high value in detecting the vascular wall characteristics of VBD, checking whether there are combined with other vasculopathy and identifying the causes of the disease.

Key words: Vertebrobasilar dolichoectasia; Computed tomography angiography; Highresolution magnetic resonance imaging

摘要：

目的探讨高分辨率磁共振成像（high-resolution magnetic resonance imaging，HR-MRI ）在椎基底动脉延长扩张症（vertebrobasilar dolichoectasia，VBD）诊断中的作用，并对HR-MRI血管壁序列和计算机断层扫描血管成像（computed tomography angiography，CTA）进行比较。方法回顾性分析2014年2月-2015年9月在我院影像科同时完成CTA和HR-MRI检查并确诊为VBD的 25例患者的影像和临床资料，分析和比较CTA和HR-MRI在VBD诊断中的价值。结果在基底动脉脑桥处直径、最大直径及长度的测量上，CTA和HR-MRI具有较好的一致性及可重复性[组内相关系数（intraclass correlation coefficient，ICC）=0.913，P＜0.001；ICC=0.951，P＜0.001； ICC=0.929，P＜0.001]；但是，在偏移度测量上，CTA和HR-MRI的一致性强度为较强[加权Kappa系数 =0.773，95%可信区间（confidence interval，CI）0.606～0.941，P＜0.001]。通过HR-MRI可准确测得椎动脉颅内段长度为左侧（32.02±6.29）mm，右侧（36.66±6.76）mm。HR-MRI检出5例合并基底动脉斑块的患者及2名合并椎动脉夹层的患者。结论 HR-MRI和CTA在VBD的诊断上具有非常好的一致性和可重复性。HR-MRI 作为一种无创检查，在研究VBD病变血管壁特点、检查有无合并其他血管病变及鉴别疾病病因方面，具有较高的诊断价值。

关键词: 椎基底动脉延长扩张症; 计算机断层扫描血管造影; 高分辨率磁共振成像

LI Shao-Ya, WANG Yi-Feng, XU Man-Man, ZHANG Xin, ZHOU Fei, LI Jing-Wei, XU Yun. A Comparision of CT Angiography and High Resolution-MRI Vessel Wall Imaging of Vertebrobasilar Dolichoecta-sia[J]. Chinese Journal of Stroke, 2018, 13(04): 344-349.

李韶雅, 王一峰, 徐曼曼, 张鑫, 周飞, 李敬伟, 徐运. 椎基底动脉延长扩张症的CTA和HR-MRI血管壁成像比较[J]. 中国卒中杂志, 2018, 13(04): 344-349.

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