膈周胸膜积液和腹膜积液的CT鉴别

分别对21例胸膜积液、18例腹膜积液及4例兼有胸腹膜积液患者的 CT 表现进行分析。结合膈肌及其邻近解剖结构,从三个不同层面描述膈周胸膜积液和腹膜积液的不同特点:胸膜积液常位于胸腔后方,呈新月形或半月形,与肝脏交界面模糊,常使膈肌脚外移;而腹膜积液位于肝脏的前外方,呈镰刀形,与肝脏的交界面清楚。

PERIDIAPHRAGMATIC PLEURAL AND PERITONEAL EFFUSION IN CT

The CT appearance of Pleural effusion(21 cases),and peritoneal effusion(18)and a combination of pleural and peritoneal effusion(4)is reviewed.It was per-formed on the observation of three succesive sections to describe the CT featuresof peridiaphragmatic pleural and peritoneal effusion in relation to the diaphragmand the adjacent structures with special interest upon the differential diagnosis.The pleural fluid is always located in the posterior recess of the pleural cavity,with a semilunar appearance,its anterior border is concave,the interface betweenthe fluid and the liver is blurred and the diaphragmatic crura is always displacedlaterally,In contrast,the peritoneal effusion is located in the antero-lateral aspectof the liver,crescent in shape with the concavity inward.The interface betweenthe fluid and the liver is distinct and sharp.