心音时域分析的新方法研究  

A New Method for Heart Sound Analysis in Time Domain

作　　者：胡玉良[1] 王海滨[1] 陈健[1] 江钟伟 乔军选[3] 

机构地区：[1]西华大学电气信息学院四川省信号与信息处理重点实验室,成都610039 [2]山口大学机械工学科 [3]解放军第452医院,成都610072

出　　处：《生物医学工程学杂志》2010年第2期425-428,共4页Journal of Biomedical Engineering

基　　金：四川省教育厅自然科学基金重点项目资助(09209025);西华大学人才引进项目资助(R0620907)

摘　　要：为快速、准确地判断心音的正常与否,本文提出一种新的心音时域分析方法——心音特征波形法。通过数字听诊器将采集到的心音数据由USB接口传输到计算机,建立单自由度分析模型提取心音特征波形,计算出心音特征参数来判别正常与异常的心音。文中通过对正常/异常心音案例分析,验证了心音特征波形法的有效性。另外,为检验已提出的心音时域分析方法对正常与异常的心音判别准确率,选用已采集的40组正常与20组异常的心音数据进行实验及统计分析,准确率分别达到92.5%和95.0%。In order to discriminate normal and abnormal heart sounds accurately and effectively,a new method is proposed to analyze heart sounds,namely heart sound characteristic waveform（HSCW） method.Digital stethoscope is used to collect heart sound signals.The recorded data are transmitted to a computer by USB interface for analysis based on HSCW,which is extracted from an analytical model of single degree-of-freedom（SDOF）.Furthermore,a case study on the normal and abnormal cardiac sounds is demonstrated to validate the usefulness and efficiency of the proposed HSCW method.Besides,in order to test the accuracy of discriminating normal and abnormal heart sounds,40 normal and 20 abnormal heart sounds are collected and analyzed,the accuracy performances are achieved by 92.5% and 95.0%,respectively.

关 键 词：心音 听诊器 信号分析 单自由度模型 心音特征波形 

分 类 号：TN911.6[电子电信—通信与信息系统]