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nao mo liu zhong liu xue guan de ci min gan jia quan cheng xiang biao xian
Pages: 255-257
Year: Issue:  3
Journal: Journal of Basic and Clinical Oncology

Abstract: 目的 探讨脑膜瘤肿瘤血管的磁敏感加权成像(SWI)表现.方法 收集我院经手术病理证实的脑膜瘤患者27例,术前均行磁共振成像(MRI)常规T1WI、T2WI、SWI及增强T1WI检查,SWI序列经后处理得到SWI图、最小信号强度投影(mIP)图及校正后相位图.比较分析脑膜瘤的常规MRI及SWI表现.结果 本组27例脑膜瘤患者中,常规MRI平扫显示16例可见肿瘤实质及瘤周迂曲流空血管信号,5例见瘤周包膜内见流空血管信号;MRI增强T1WI显示25例肿瘤实质呈明显强化,2例呈中度强化,14例肿瘤包膜强化尤为显著;SWI图、mIP图显示肿瘤实质均呈等或稍高信号,包膜呈低信号,瘤周水肿呈稍高信号,27例均可见肿瘤实质及瘤周迂曲高或低信号血管影,14例包膜内可见低信号环形血管影;相位图显示肿瘤实质均呈等高信号,包膜和瘤周水肿显示不明确,血管信号呈低信号;SWI对脑膜瘤肿瘤实质、肿瘤包膜及瘤周水肿的显示具有特征性,能够显示27例肿瘤微血管结构,MRI平扫显示肿瘤血管例数为16例,SWI对肿瘤微血管显示例数多于常规MRI检查.结论 脑膜瘤在SWI序列上的表现具有特征性,SWI图、mIP图及相位图的联合应用可准确显示肿瘤内微血管及瘤周包膜结构,反映肿瘤血供,SWI是常规MRI诊断脑膜瘤的一种重要补充手段.
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