目的 :总结快速自溶的急性硬膜下血肿 (acutesubduralhematoma ,ASDH)的CT特征 ,并对其溶解吸收机理及与CT表现的相互关系进行探讨。方法 :收集 15例急性期内完全或大部分溶解吸收的ASDH病例 ,男 8例 ,女 7例 ,均为外伤所致。全部用TOSHIBAXvision 32 0 0常规扫描 ,层厚层距均为 10mm ,对血肿层厚小于两个层面的采用 3mm薄层扫描。结果 :15个ASDH于急性期或亚急性期完全溶解吸收 ,出血量均 <15ml,12个与颅内板局部或全部有低密度间隙。结论 :ASDH的快速自溶吸收与脑脊液 (CSF)的灌注对血肿的稀释和回流吸收 ,以及肿胀实质对硬膜下腔的挤压有关 OBJECTIVE: To summarize the CT features of rapidly autolytic acute subdural hematoma (ASDH), and to explore its mechanism of lysis and absorption and its correlation with CT findings. Methods: Fifteen cases of ASDH, which were completely or mostly dissolved and absorbed during the acute phase, were collected. There were 8 males and 7 females, all of whom were traumatized. All TOSHIBAXvision 3200 routine scanning, layer thickness layer spacing are 10mm, hematoma layer thickness of less than two layers using 3mm thin layer scan. Results: Fifteen ASDH were completely dissolved and absorbed in the acute or subacute stage. All the bleeding volume was less than 15ml. There were 12 low-density interstitial spaces in all of 12 cases. CONCLUSIONS: The rapid autolysis of ASDH is associated with dilution and reflux absorption of hematoma, as well as the substantial swelling of the epidural space, associated with cerebrospinal fluid (CSF) perfusion