论文部分内容阅读
目的探讨3.0T磁共振磁敏感加权成像(susceptibilityweightedimaging,SWI)对颅内静脉血管瘤诊断的敏感性和特征性。资料与方法采用3.0T磁共振SWI序列,回顾性分析经DSA或病理证实的12例颅内静脉血管瘤患者的影像学资料,并与常规磁共振成像(cMRI)和传统T2*WI进行对照。结果SWI显示颅内静脉血管瘤12例(100%),T2*WI显示9例(75%),cMRI显示4例(33%)。cMRI表现为流空信号,呈“星芒”状或“管”状聚集,T2*WI表现为“星芒”状低信号,而SWI能够清晰显示脑白质内“伞”样聚集的髓质静脉,经增粗的汇集静脉向硬膜窦或室管膜引流,形成典型“海蛰头征”。结论SWI能清晰显示小静脉,对颅内静脉血管瘤具有重要诊断价值。
Objective To investigate the sensitivity and specificity of 3.0T magnetic resonance susceptibility weighted imaging (SWI) for the diagnosis of intracranial venous hemangiomas. Materials and Methods Imaging data of 12 patients with intracranial venous hemangiomas confirmed by DSA or pathology were retrospectively analyzed by 3.0T MRI SWI series and compared with conventional magnetic resonance imaging (cMRI) and conventional T2 * WI. Results SWI showed 12 cases of intracranial venous hemangiomas (100%), T2 * WI showed 9 cases (75%) and cMRI showed 4 cases (33%). The cMRI showed a stream-empty signal with “star-shaped” or “tube” shaped aggregation, while T2 * WI showed a “star-shaped” low signal while the SWI could clearly show the white matter “Like gathered medullary vein, the thickening of the venous drainage to the dura or ependymal drainage, the formation of a typical ” jellyfish head sign ". Conclusion SWI can clearly show the small veins, which has important diagnostic value for intracranial venous hemangiomas.