结核性脑膜炎的CT评价

目的　评价结核性脑膜炎（TBM）的CT表现和诊断作用。方法　对40例临床诊断为TBM的CT平扫和增强扫描进行了回顾性研究。结果　CT扫描36例（90%）显示异常，其他4例正常。CT扫描异常表现包括脑底渗出22例，脑积水36例，脑梗塞11例和结核瘤9例。结论　TBM的特征性CT表现为脑底池和外侧裂的炎性渗出，CT扫描对于观察TBM的脑积水、脑梗死和结核瘤等并发症也很重要，这些因素都和治疗计划相关。经过内科治疗以后，CT显示结核瘤持续存在或者进行性脑室扩张，应当考虑手术治疗。

CT Evaluation of Tuberculous Meningitis

Objective To evaluate the CT features and its diagnostic value in tuberculous meningitis(TBM).Methods Forty patients who had clinically proved TBM and each was performed with CT scans and enhanced CT were retrospective studied.Results CT scans showed abnormalities consistent with TBM in 36 cases(90%) whereas others(4 cases)were normal.Abnormalities were visualized on CT scans included basal exudate in 22 cases,hydrocephalus 36 cases,infarcts 11 cases and tuberculomas 9 cases.Conclusion The most characteristic findings with TBM are exudates in the basal cisterns and Sylvian fissures.It is essential in studying CT scans of TBM to make a note of the associated changes such as hydrocephalus,infarction and tuberculomas.These factors have a bearing on the plan of treatment.Surgical intervention should be considered after a conservative treatment if the tuberculoma consistent exists,or progressive ventricular enlargement are identified on CT.