【摘要】 心脏扩大是器质性心脏病的重要体征之一。心胸比率(CTR)是衡量心脏大小的一个重要的指标。本文提出了一种基于数字图像的改进C-V水平集方法,用于肺部分割及自动计算CTR。同时,本文还对收集的3 120例北京地区在职人群的体检胸片进行了CTR测量及统计分析。依据年龄、性别分组,分别进行统计,较为精确地得出北京地区在职人群的CTR,为临床诊断心脏增大以及预测心血管疾病发展提供了参考依据。更多还原

【Abstract】 Cardiac enlargement is an important symptom of vascular and heart disease.The cardiothoracic ratio(CTR)is an important index used to measure the size of heart.The aim of this study was to assess the relationship between aging and cardiothoracic ratio.This paper also presents an improved C-V level set method to segment lung tissue based on X-ray image,which used to automatically compute CTR.In the investigation carried out in our school,we got more than 3 120chest radiographs from medical examination of the working population in Beijing,and we systematically studied the effects of age and gender on the CTR to obtain reference values for each group.The reference values established in this study can be useful for recording and quantifying the cardiac enlargement,so that it may be useful for calling attention to the cardiovascular diseases and the heart diseases.更多还原