摘要
目的:探讨小脑幕脑膜瘤的CT、MRI表现,提高其诊断水平。材料和方法:回顾性分析17例经病理证实为小脑幕脑膜瘤的CT、MRI表现。结果:17例小脑幕脑膜瘤中,肿瘤呈哑铃状8例、突向幕下6例和突向幕上3例。CT呈略高密度12例、等密度3例和完全钙化2例。T1WI呈等低信号8例和略高信号5例;T2WI略高信号11例和等信号2例。肿瘤非钙化部分均呈明显增强。结论:小脑幕脑膜瘤的CT、MRI表现较为典型,但单纯CT轴位扫描定位困难,CT多层面重建(MPR)及MRI多方位扫描有助于对其做出正确诊断。
Purpose： To investigate the features and improve the diagnosis of tentorial meningiomas.Materials and Methods： The CT and MRI features in 17 tentorial meningiomas pathologically proved were analyzed retrospectively.Results： Of 17 cases the tumor appeared as a dumb-bell in 8 cases,extruded down infratentorium in 6 caese,upward supratentorium in 3 cases.CT showed slight hyperdensity of the tumors in 12 cases,isodensity in 3 cases,and the total tumor calcified in 2 cases.On T1WI the tumor had signal iso-or hypointensity in 8 cases,and slight hyperintensity in 5 cases,but on T2WI the tumor had signal slight hyperintensity in 11 cases,and isointensity in 2 cases.The uncalcified parts of the tumors were strongly enhanced.Conclusions： CT and MRI characteristics are typical,but only axial CT scan is limited.CT-MPR and multi-direction MRI scans are very helpful to make a diagnosis of meningiomas.
出处
《中国医学影像学杂志》
CSCD
2007年第5期357-360,共4页
Chinese Journal of Medical Imaging
关键词
小脑幕
脑膜瘤
CT
MRI
tentorium cerebelli
meningioma
CT
magnetic resonrance imaging
