摘要
目的：探讨磁敏感加权成像（SWI）技术对脑血管畸形诊断的价值及脑血管畸形的SWI影像特征。资料与方法：选取2007年10月～2008年7月MRI显示的典型脑血管畸形41例（海绵状血管瘤23例，动静脉畸形13例，静脉畸形5例）进行磁共振扫描，扫描序列包括T1WI、T2WI、T1WI增强扫描及SWI，与手术所见及DSA对比，将SWI与常规MRI对比，分析其对脑血管畸形的诊断价值。结果：SWI可以显示较常规序列更多的海绵状血管瘤病灶，发现3例脑内弥漫性血管瘤及5例多发病变的病例；同一病灶SWI显示的范围较常规序列大；SWI显示6个静脉畸形病灶，而常规序列显示5个，可以显示扩张的髓静脉，并与T1WI增强扫描图像很好的对应；SWI可以显示DSA显示的15支供血动脉中的13支（常规序列显示13支），20支引流静脉中的18支（常规序列显示13支）。结论：SWI是显示血管畸形最敏感的MR序列，是筛查脑血管畸形的理想手段，结合MRI常规扫描序列可以为脑血管畸形的诊断及内部组织结构判断提供更多的信息。
Abstract
Objective: To discuss the value of susceptibility-weighted imaging(SWI) in the cerebral vascular malformations and the features of SWI. Materials and Methods: Forty-one patients(with cerebral vascular malformations including 23 cases of cavernous angioma, 13 cases of arterio-venous malformation, 5 cases of venous malformation) were examined with MR scanner. The sequences included SWI, T1WI, T2WI and post-contrast T1WI. The comparison of SWI and conventional MR sequences was done according to surgical findings and the imaging of DSA, then discuss the value of SWI in the diagnosis of cerebral vascular malformations. Results: SWI showed more lesions of cavernous angioma than conventional sequences, and SWI detected 3 cases of wide spread hemangiomas and 5 cases with multiple nidi. SWI displayed the same lesion larger than the conventional sequences. Five cases of venous malformation, 6 lesions are shown by SWI, and 5 shown by conventional sequences, and the medullary veins showed clearly, according to the post-contrast T1WI; SWI revealed 13 feeding arteries and 18 draining veins, and the conventional sequences showed the same number of feeding arteries and 13 draining veins. Conclusion: SWI is the best sensitive sequence for detecting cerebral vascular malformation, and the ideal method to screen the cerebral vascular malformations, it will provide more complete and detailed information combining with other sequences.
关键词
中枢神经系统血管畸形 /
磁共振成像
Key words
Central nervous system vascular malformations /
Magnetic resonance imaging
唐乐梅;宋清伟;郎志谨;杨志宏.
脑血管畸形磁敏感加权成像的应用初探[J]. 中国临床医学影像杂志. 2009, 20(2): 77-79
TANG Le-mei;SONG Qing-wei;LANG Zhi-jin;YANG Zhi-hong.
Preliminary study of MR susceptibility-weighted imaging in cerebral vascular malformation[J]. Journal of China Clinic Medical Imaging. 2009, 20(2): 77-79
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