摘要
利用肝脏硬度的无创伤估计系统 ,可以及时估计肝脏的弹性状况 ,对了解和控制肝病进程有积极的意义。本文先在常用超声仪上获得肝脏的 M型超声图像 ,接着从图像中分别提取肝脏包膜的运动包络和 A型扫描信号相关系数随时间变化的曲线 ,然后从运动包络和相关曲线中提取出相应的特征参量 ,最后用 Fisher判别法进行肝脏是否硬化的分类决策。结果表明 :该方法可以为简单、有效地诊断肝硬化提供新的手段。
A non invasive estimation system for the hardness of livers which can reflect the elasticity of livers in time is significant to diagnose and control the disease.In this paper an M mode ultrasound image was firstly obtained from the human's liver using a general ultrasonic scanner.From this image,the motion envelope of the li ver was extracted and the correlation coefficient waveform between pairs of A scan signal was calculated.Then several feature parameters were estimated from the obtained motion envelope and correlation coefficient waveform.Finally a Fisher decision criterion was used to classify the livers' hardness.The application results showed that this proposed method is simple and efficient for the livers' hardness diagnosis.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2002年第3期283-287,共5页
Chinese Journal of Scientific Instrument
基金
上海市教委重点学科基金资助项目
