目的 MRI在脑膜瘤诊断中的研 究。方法 回顾性分析我院2012年7月至 2014年7月经病理证实为脑膜瘤的35例患 者MRI表现，以病理检查结果为准。所有 患者均行T1和T2加权，T1加权增强扫描。 记录患者MRI诊断准确率，分析MRI征象、 不同部位肿瘤出现率、肿瘤大小及不同亚 型脑膜瘤的信号强度。结果 本组35例患 者，经MRI检查后确诊脑膜瘤33例，诊断 准确率为94.29%。脑膜瘤中大脑凹面是 脑膜瘤患者肿瘤出现率最高的部位，占 34.29%；其次为后颅窝与鞍结节，分别占 22.86%与14.29%；MRI显示单个肿瘤最大 径在1.4-9.9cm之间，肿瘤大小＞4.0cm的 19例，占54.29%；肿瘤大小在2.0-4.0cm 的有13例，占37.14%；肿瘤大小＜2.0cm 的3例，占8.57%。T1WI肿瘤多为低信号与 等信号。T2WI不同亚型脑膜瘤多为等信 号、稍高信号。结论 脑膜瘤MRI表现多 样，不同部位肿瘤出现率有差异，诊断准 确率较高，T2加权为典型信号，可为临床 诊断提供一定的指导意义。

Objective To study MRI in the diagnosis of meningioma. Methods The MRI findings of 35 patients with pathologically confirmed meningioma between July 2012 and July 2014 were analyzed retrospectively, and the results of pathological examination were taken as basis. All patients underwent T1 and T2 weighted and T1 weighted enhanced scan. The diagnosis accuracy of MRI was recorded. MRI signs, incidence of tumor in different sites, tumor size and signal intensity of different subtypes of meningioma were analyzed. Results Among 35 cases, 33 cases were diagnosed with meningioma by MRI, and the diagnostic accuracy was 94.29%. Brain concave was the highest incidence of tumor in patients with meningioma, accounting for 34.29%, followed by the posterior cranial fossa and tuberculum sellae, accounting for 22.86% and 14.29% respectively. MRI showed the maximum diameter of a single tumor was 1.4-9.9cm, tumor size>4.0cm in 19 cases, accounting for 54.29%, tumor size ranged from 2 to 4.0cm in 13 cases, accounting for 37.14%, tumor size < 2.0cm in 3 cases, accounting for 8.57%. Tumors mainly showed low signal and equal signal on T1WI, and different subtypes of meningioma mainly showed equal signal and slightly higher signal on T2WI. Conclusion MRI findings of meningioma are various. The incidence of tumor in different sites is different. The diagnostic accuracy is high, and T2 weighted is the typical signal, which can provide some guidance for clinical diagnosis.