回顾性分析 37例等密度硬膜下血肿 (ISDH)的 CT表现及形成机制。间接征象的观察在 ISDH诊断中占有重要地位 ,主要有 :1侧脑室受压变形及中线结构移位 ,2脑灰白质界面广泛一致性内移 ,3脑白质凹陷征 ,4脑沟消失及脑回聚拢内移征。 CT增强扫描对 ISDH的诊断有很大帮助 ,表现为 :1患侧脑表面血管内移 ,2血肿膜呈点线状高密度影 ,3血肿腔本身增强。认为熟悉 ISDH各种 CT征象 ,增强扫描征象 ,必要时辅以冠位增强扫描能提高 ISDH的诊断准确率 Retrospective analysis of 37 cases of equal density subdural hematoma (ISDH) CT findings and the formation mechanism. Indirect signs of observation in the diagnosis of ISDH occupy an important position, there are: 1 lateral ventricular compression and midline shift, 2 extensive convergence of gray matter interface, 3 leukoaraiosis, 4 sulci disappear and brain Back to gather within the transfer levy. CT enhanced scan for the diagnosis of ISDH great help, manifested as: 1 ipsilateral brain surface vascular displacement, 2 hematoma showed a dotted high density, 3 hematoma cavity itself enhanced. They are familiar with all kinds of CT signs of ISDH, enhance the signs of scanning, and if necessary, enhance the diagnostic accuracy of ISDH