一、目的游离性胸腔积液 ,积液量在 30 0ｍｌ以下者普通摄片 (后前位胸片 )及透视通常不能显示。为了显示少量胸腔积液 ,我们采用侧斜卧位水平投照方法 ,取得了较满意的效果。现报告如下。二、材料与方法1、病例选择2 7例ＣＴ证实有少量胸腔游离积液患者 ,男性 1 5例 ,女性 1 2 First, the purpose of the free pleural effusion, the amount of fluid in 30 0ml ordinary radiography (posterior chest radiography) and fluoroscopy can not usually be displayed. In order to show a small amount of pleural effusion, we use lateral projection horizontal projection method, and achieved satisfactory results. The report is as follows. Second, materials and methods 1, the choice of cases 27 cases of CT confirmed a small amount of patients with pleural effusion, male 15 cases, female 12