螺旋CT在先天性漏斗胸中的应用价值

目的:利用螺旋CT研究Haller指数、胸骨凹陷深度和心脏旋转角在漏斗胸诊治中的价值.方法:70例漏斗胸患儿手术前后均行螺旋CT检查.Haller指数测定法:胸部最大内横径与同层面最小前后内径的比值.心脏旋转角:椎体前缘矢状线及其与心尖连线的夹角.在横轴面CT图像上测量胸骨凹陷深度(d).测量患者组和正常对照组手术前后...

Spiral CT in congenital pectus excavatum

Objective：To evaluate the value of Haller index,the sternal depression,and the cardiac rotation angle in petus excavatum on the basis of the pre-and postoperative spiral CT features.Methods：Chest CT images in 70 cases of pectus excavatum performed from 2003-01 to 2010-07 were retrospectively analyzed.The Haller index was the ratio of the maximal internal transverse diameter of the chest and the minimal anteroposterior diameter of the chest at the same level.The depth of sternal depression was measured on axial CT images of the chest.The cardiac rotation angle was defined as the angle between the longitudinal prevertebral line and the line from the cardiac apex to the prevertebral line.Comparative analysis was carried out for the pre-and postoperative Haller index,cardiac rotation angles,and sternal depression with those of control group.AP value less than 0.05 indicated statistical significance.Results：Seventy cases with pectus excavatum all presented with the variable depressed sternums.The Haller index was 5.37±1.91（preoperation） and 3.41±1.62（posto-peration）（t=6.32,P0.01）.Cardiac rotation angles were 65.7°±9.81°（preoperation） and 61.4°±8.67°（postoperation）（t=2.57,P0.05）.The cardiac rotation angle was correlated with Haller index in pectus excavatum（r=0.87,P0.01）.The preoperative and postoperative depth of sternal depression were（19.2±7.2）mm and（9.1±4.1）mm（P0.01）,respectively.Conclusion：Haller index,the sternal depression,and the cardiac rotation angle are important CT manifestations for diagnosing pectus excavatum.