AJNR:双层磁敏感血管征和磁敏感血管征高估率诊断心源性脑栓塞

2019-03-13 佚名 脑血管病及重症文献导读

双层磁敏感血管征(2-layered susceptibility vessel sign,TL-SVS)是指不均匀的 SVS,线样低信号核心,周围环绕了高信号。

双层磁敏感血管征(2-layered susceptibility vessel sign,TL-SVS)是指不均匀的 SVS,线样低信号核心,周围环绕了高信号。

SVS 高估率(overestimation ratio,overR)= SVS 宽度/大动脉的宽度。

研究发现存在 TL-SVS 和 高overR 提示为心源性卒中,在3T核磁中联合 TL-SVS 和高 overR 诊断心源性卒中的特异性高达100%。

示例:A 和 B 为 TL-SVS。62岁,男性,心源性左侧 MCA 闭塞。1.5T T2*-加权 GRE 影像(白色箭头)显示 TL-SVS,可见低密度信号核心(箭头),周围环绕高信号:

示例:C 和 D 为 SVS 和 SVS overR。69岁,男性,右侧 MCA 闭塞。SVS overR 为2.21,病因学诊断为心源性栓塞。C 为 T2* GRE。D 为TOF-MRA 和 T2* GRE 重叠(coregistered)影像:

原始出处:
R. Bourcier, I. Derraz, S. Bracard, et al. Two-Layered Susceptibility Vessel Sign and High Overestimation Ratio on MRI Are Predictive of Cardioembolic Stroke. AJNR Am J Neuroradiol. 2019 Jan;40(1):65-67.

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    2019-03-15 mhm295
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