目的 探讨头颅MRI强化扫描对 脑膜瘤的临床诊断效果。方法 选取我院 2014年3月-2015年12月期间收治的80例 脑膜瘤患者作为研究对象，均行头颅MRI 平扫及强化扫描，观察病变的位置、大 小、形态、信号、强化方式等影像学表 现，并结合临床资料和手术病理结果进 行综合分析。结果 80例患者经手术及 病理确诊均为单发病灶，其中肿瘤位于 顶部大脑凸面、矢状窦旁、蝶骨嵴、大 脑镰旁、侧脑室、桥小脑角的分别有33 例、17例、9例、14例、2例、5例，尺寸 在1.3×1.0×1.2cm-6.3×4.8×6.2cm之 间，形态主要呈圆形或类圆形、半月形； MRI对所有病灶的检出符合率为91.25%， 与手术及病理诊断结果比较，差异无统计 学意义(P>0.05)；脑膜瘤的MRI信号特点 是在T1WI上多呈等信号，在T2WI上多呈稍 高信号，少数在T1WI和T2WI上均呈混杂不 均匀信号，强化扫面后，大多数病灶显示 明显强化，少数强化不均匀。结论 经头 颅MRI扫描，尤其是MRI强化扫描，脑膜瘤 在的信号特点及表现都具有特征性，且 头颅MRI强化扫描对病灶的检出符合率较 高，具有定位及定性诊断的作用，在临床 中可以作为诊断脑膜瘤的重要影像学手 段，值得进一步推广和应用。

Objective To investigate the effect of MRI enhanced scanning in the diagnosis of meningioma. Methods 82 cases of meningioma patients in our hospital were selected from March 2014 to December 2015. MRI scan and enhanced scan were performed in all patients. The position, size, shape, signal and enhancement of the lesion were observed. And combined with clinical data and surgical pathology results to make comprehensive analysis. Results 80 cases were confirmed by operation and pathological diagnosis were single lesions. The beside tumor located at the top of the cerebral convexity, parasagittal sinus, sphenoid ridge, falx cerebri, lateral ventricle, cerebellopontine angle patients were 33 cases, 17 cases, 9 cases, 14 cases, 2 cases, 5 cases. The tumor size between 1.3×1.0×1.2cm-6.3×4.8×6.2cm, tumor morphology were round or oval and half moon. The rate of MRI was 91.25% for all lesions. The difference was not statistically significant (P>0.05) compared with the results of surgery and pathology. The MRI signal of meningioma is characterized by a large signal on the T1WI and slightly high signal on T2WI. The minority in T1WI and T2WI showed mixed inhomogeneous signal. After enhancement scanning, most lesions showed marked enhancement, and a few showed that the enhancement was not uniform. Conclusion After the skull MRI scanning, especially MRI enhanced scan, the signal features and manifestations of meningiomas are characteristic. And the MRI enhanced scan of the skull has a high rate of coincidence rate, which has the function of localization and qualitative diagnosis. MRI enhanced scan can be used as an important imaging tool in the clinical diagnosis of meningioma. It is worthy of further promotion and application.