ZTEMRA对脑血管支架植入术后的随访评估价值

Value of ZTEMRA for Assessing the Blood flow in the Celebral Vessels with Implanted Stents

目的探讨零回波时间MRA(ZTEMRA)对脑血管支架植入术后的随访评估价值。方法搜集头颈部血管支架植入术后患者18例共计20支血管,术后采用ZTEMRA、CEMRA检查。主要观察支架段血管血流显示情况,根据伪影大小采用4分法评估血流信号强弱。采用Wilcoxon秩和检验比较两种方法对支架段血流信号显示的差异。结果ZTEMRA、CEMRA显示的载瘤动脉血流信号评分分别为2.350±0.745、1.825±0.815,差异有统计学意义(Z=-3.027,P=0.001)。结论ZTEMRA对支架段脑血管的评估优于CEMRA,是一种可行的评估手段。

Objective To explore the feasibility of zero echo time magnetic resonance angiography(ZTEMRA)for assessing the blood flow in the celebral vessels with implanted stents and when contrast-enhanced magnetic resonance angiography(CEMRA)was used as contrast.Methods 18 patients with 20 vessels implanted with the Enterprise stent were enrolled in this study.CE-MRA and ZTE-MRA sequences were performed by GE750 W MR.Depictions of flow signal within the parent artery were scored using a 4-score grading system.Wilcoxon signed rank tests were applied to compare the difference between CEMRA and ZTEMRA.Digital subtraction angiography(DSA)was used as a reference.Results Scores of ZTEMRA and CEMRA were 2.350±0.745,1.825±0.815 respectively.ZTEMRA demonstrated better flow signal(Z=-3.027,P=0.001).Conclusion For follow-up of cerebral vessels with implanted stents,ZTEMRA is superior to CEMRA for depiction of the parent artery lumen and it proves to be a feasible method.