3D-VISTA在自发性头颈动脉夹层中的诊断价值
Journal of Clinical Radiology(2017)
Abstract
目的 分析自发性头颈动脉夹层(SCAD)在三维容积各向同性快速自旋回波(3D-VISTA)高分辨率磁共振成像(HRMRI)中的影像学特征,并探讨3D-VISTA HRMRI在SCAD的应用价值.方法 搜集头颈部血管同时行DSA及3D-VISTA扫描的51例患者(65支血管),以DSA为诊断金标准,计算3D-VISTA诊断SCAD的敏感性、特异性等指标.结果 DSA及3D-VISTA分别诊断夹层17例(19支血管)和19例(24支).3D-VISTA诊断夹层敏感性为84.2%,特异性为82.6%,阳性预测值为66.7%,阴性预测值为92.7%.壁间血肿(14支)、内膜片(13支)、双腔征(8支)、动脉瘤样扩张(6支)、壁间血肿或假腔沿真腔呈螺旋状走行(9支)为SCAD在3D-VISTA中的特征性影像征象.结论 3D-VISTA能同时显示管腔及管壁信息,对壁间血肿敏感性高,对于其他影像学检查无法确诊的夹层病例,可行病变段血管3 D-VISTA扫描,提高诊断正确率.
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Key words
Spontaneous cervicocerebral artery dissection,Intramural hematoma,3D Volumetric isotropic TSE acquisition,Digital subtraction angiography
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