病毒性脑炎的CT诊断

CT diagnosis of viral encephalitis

目的 :进一步认识病毒性脑炎的CT特征 ,以提高CT诊断的准确性。方法 :回顾性分析 19例病毒性脑炎的临床及CT资料 ,其中单纯疱疹病毒 (HSV)脑炎 13例 ,EB病毒 (EBV)脑炎 6例。均行CT平扫 ,16例行增强扫描。结果 :13例HSV脑炎均累及颞叶和脑岛 ,单侧受累者 11例 ,双侧 2例。 6例EBV脑炎均累及双侧基底节核团 ,其中 4例累及双侧壳核 ,随访病变消失。另 2例累及双侧豆状核和尾状核 ,随访仅见尾状核病变消失。结论 :HSV脑炎及EBV脑炎的CT表现具有一定特征性 ,CT对判断EBV脑炎的预后有一定价值。

Objective:To make a further recognition of CT characteristics of viral encephalitis to improve its diagnostic accuracy.Methods:The clinical materials and CT findings of 19 cases with viral encephalitis were analyzed retrospectively.Those patients included 13 of herpes simplex viral(HSV) encephalitis and 6 of Epstein Barr viral(EBV) encephalitis.Plain CT scans were performed in all patients and an additional enhanced CT scans in 16.Results:HSV encephalitis of 13 cases involved unilateral temporal lobe and insula in 11 cases and bilateral in 2.EBV encephalitis of 6 cases involved bilateral basal ganglia nucleuses,and additional bilateral putamen nucleuses were involved in 4 cases,which became normal on follow up.In another 2 cases,bilateral lenticular and caudate nucleuses were involved,but only caudate nucleuses involved became normal on follow up.Conclusion:HSV and EBV encephalitis have certain CT features. Moreover ,CT is valuable for evaluating the prognosis of EBV encephalitis.