Euro Radio:应用TOF-MRA,做到颅内动脉狭窄的无创精准分析!

2022-02-20 shaosai MedSci原创

颅内动脉粥样硬化疾病(ICAD)是全球急性缺血性卒中最常见的病因之一,约占脑梗死原因的10%。尽管接受了最好的药物治疗,ICAD引起的血流动力学上的显著狭窄仍有近12%的病例在1年内复发脑梗死。

颅内动脉粥样硬化疾病(ICAD)是全球急性缺血性卒中最常见的病因之一,约占脑梗死原因的10%。尽管接受了最好的药物治疗,ICAD引起的血流动力学上的显著狭窄仍有近12%的病例在1年内复发梗死。虽然ICAD的治疗在近几十年来有所发展,但药物治疗仍是目前的治疗标准。相比之下,血管内治疗对严重狭窄(70-99%)且在药物治疗后仍复发梗死的特定亚组患者有明显疗效

TOF-MRA是目前应用最广泛的非侵入性成像技术,无需使用造影剂,大多数磁共振(MR)扫描仪进行。然而,TOF-MRA评估颅内动脉狭窄的主要缺点是其阳性预测值(PPV)低。与DSA相比,根据华法林-阿斯匹林症状性颅内疾病(WASID)方法,TOF-MRA对颅内动脉狭窄(>50%)的识别PPV为59%。由于临床上对无创血管检查的需求逐渐增加,因此开发一个新的分级系统来准确评估TOF-MRA的狭窄程度显得尤为重要

近日,发表在European Radiology杂志的一项研究建立并验证了一个新的用以估计TOF-MRA狭窄程度分级系统,并将其诊断性能与WASID方法进行比较,以DSA作为参考标准,为临床上无创评估脑动脉狭窄提供了影像学支持

项单中心队列研究分析了2014年1月至2020年2月期间一个综合卒中中心的前瞻性观察登记数据。纳入了接受数字减影血管造影(DSA)的颅内大动脉狭窄患者;根据TOF-MRA的物理特征制定了一个4级分级系统。本研究评估了MRAVICAST对每个等级的总体诊断准确性、观察者间的可重复性以及对>50%和>70%狭窄的阳性预测值。 

本研究分析了71名患者(34名男性和37名女性;平均年龄61.0±15.25岁;范围21-89岁)的132个颅内动脉粥样硬化狭窄段。MRAVICAST的总体诊断准确性(93.9%,124/132)高于MRAWASID(50.8%,67/132)的各个等级。狭窄程度在MRAVICAST和DSAWASID之间没有明显差异(P = .849)。MRAVICAST显示出极好的观察者间一致性(ICC,0.989;95% CI,0.979-0.999)。MRAVICAST对>50%和>70%狭窄的诊断的阳性预测值分别为97.3%和100.0%。 

 

 以DSAWASID为参考标准的MRAWASID和MRAVICAST的准确性,以及MRAWASID与DSAWASID之间和MRAVICAST与DSAWASID之间的一致性

本研究表明新的直观分级系统准确而可靠地明确了颅内动脉粥样硬化患者的狭窄程度。MRAVICAST可以成为评估颅内动脉狭窄的MRAWASID的多功能无创评估手段

原文出处

Sung-Hye You,Byungjun Kim,Kyung-Sook Yang,et al.Development and validation of visual grading system for stenosis in intracranial atherosclerotic disease on time-of-flight magnetic resonance angiography.DOI:10.1007/s00330-021-08319-5

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    2022-03-14 daviiliu
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    2022-06-11 feather89
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    2022-02-22 FukaiBao

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