摘要
目的探究CT与MRI对小脑膜瘤的应用价值。方法回顾性分析13例小脑膜瘤的CT与MRI表现。13例均行CT、MRI平扫及MRI增强扫描,平扫包括T1WI、T2WI、FLAIR序列,增强扫描为T1WI序列。结果本组病灶位于额部5例,顶部7例,小脑幕1例,为脑凸面、大脑镰、小脑幕旁结节状或扁平状病灶,长径范围1.2-2.8cm。CT平扫表现为稍高密度结节。T1WI肿瘤呈等信号7例,稍低信号5例;T2WI、FLAIR为稍高信号8例,等信号4例;肿瘤边缘包膜4例,瘤周水肿5例,邻近颅板增厚4例;肿瘤病灶增强后明显均匀强化,8例见脑膜尾征。CT平扫检出8例(61.5%),漏检5例(38.5%)。MRI平扫检出12例(92.3%),漏检1例(7.7%);MRI增强扫描检出13例(100%)。结论小脑膜瘤的MRI表现具有一定的特征性,MRI对小脑膜瘤检出率高,临床应用价值较CT大。
Objective To explore the evaluation of CT and MRI in the diagnosis of small meningioma. Methods The datas of 13 cases of small meningioma were analyzed retrospectively, including CT plain scan, MRl scan and contrast enhancement-MRI. MRI scan sequence are T1WI, T2WI, FLARI and enhanced T1WI.Results The lesions located in the frontal part （5 cases）, parietal part （7 cases） and tentorium of cerebellum （I cases）. The lesions could be nodulars or flat lesions, mostly located in brain onvex, cerebral falx and tentorium ofcerebdlum, the diameter range from 1.2 cm to 2.8 cm. On CT scan the lesions appeared as slightly high density., nodules. O11 MRI T1WI the lesions appeared as isointensity （7 cases） and slightly hypointensiy （5 cases）; on T2WI and FLAIR the lesions appeared as isointensity （4 cases） and slightly hyperintensiy （8 cases）. The minor capsular （4 cases）, edema （5 cases）, adjacent cranial thickening （4 cases）. Postcontrast shows that the tumor obviously uniform enhance. CT scan diagnosis 8 cases （61.5%）, missing 5 cases （38.5%）; MRI scan diagnosis 12 cases （92.3%）, missing 1 cases （7.7%）, MRI contrast enhancement scan diagnosis 13 cases（100%）. Conclusion Small memngioma have distinctive MRI manifestations and high detection rate.
出处
《中国CT和MRI杂志》
2014年第1期33-35,共3页
Chinese Journal of CT and MRI
