目的 利用CT分析等密度慢性硬膜下血肿的影像特点。方法 经临床手术确诊的13例患者，年龄64-84岁，平均73 岁，采用西门子Emotoin 16排或联影uCT760 128层CT机进行扫描，其中一例进行平扫及增强扫描，其余全部平 扫。结果 全部病例均为弧形或新月形。发生在左侧3例，右侧4例 ，双侧6例。全部13例患者血肿均发生在幕上， 一侧或两侧颞顶或额颞顶部颅骨内板下大脑皮质的外缘部，1例较大血肿累及到枕部。血肿长径(前后径)为5.5- 13.2cm(平均9.1cm)，宽径约0.6-2.3cm(平均1.4cm)。结论 CT有助于等密度慢性硬膜下血肿的早期发现，能够准确 地判断其位置和范围，能为临床治疗提供重要信息。

Objective Analysis of the imaging features of chronic subdural hematoma by CT. Methods Clinical diagnosis of 13 cases of patients, age 64-84 years old, average age of 73 years old. Using SIEMENS Emotion 16 row or LianYing uCT760 128 layer CT scanning of the movie, a case of plain scan and enhanced scan, and all the rest. Results The cases are arc or crescent which 3 cases occurred in left side, 4 in right side and 6 in bilateral side. All of the 13 cases of hematoma occurred in the supratentorial, one side or both sides of the top of the temporal or frontal bone of the skull, the outer edge of the cerebral cortex, the greater the hematoma involved in the occipital part of the 1.The length and diameter of hematoma was 5.5-13.2cm (mean 9.1cm), and the width was about 0.6-2.3cm (mean 1.4cm). Conclusion CT is helpful for the early detection of chronic subdural hematoma, which can accurately determine the location and extent of the disease, and can provide important information for clinical treatment.