外部性脑积水的CT诊断

CT diagnosis on extraneous hydrocephalus

目的探讨外部性脑积水(EH)的CT特征及随访价值。方法回顾性分析50例外部性脑积水的CT表现及随访情况。结果EH的CT特征为两侧额顶部对称性蛛网膜下腔间隙增宽≥5 mm,边缘呈"花瓣样",纵裂前部增宽≥7 mm,纵裂后部不宽;严重者可伴双侧侧裂池增宽及鞍上池增大,脑室不大或轻度增大。结论CT检查对EH的诊断及随访有重要价值。

Objective To explore the CT traits and following-up value on extraneous hydrocephalus（EH）.Methods The CT manifestation and following observation of 50 patients with EH were analyzed retrospectively.Results CT traits of EH： the symmetric cavitas subarachnoidealis fissure at the top of bilateral lobus frontalis widened at least 5mm;the border looked like ＂petal＂;the front vertical fissure widened at least 7mm,the back vertical fissure was not wide;on patients with serious EH,the bilateral cistern of lateral fossa of cerebrum widened and suprasellar cistern increased while the ventricles of the brain did not increase or increased slightly.Conclusion CT check is very valuable in the diagnosis and following-up of EH.