基于几何算法的T波终点检测研究  

Study of T-wave End Detection with Geometric Method

作　　者：王娟[1] 黄忠朝[1] 刘正春[1] 

机构地区：[1]中南大学信息物理工程学院生物医学工程研究所,湖南长沙410083

出　　处：《中国医学物理学杂志》2010年第2期1751-1754,共4页Chinese Journal of Medical Physics

基　　金：国家自然科学基金(No.60801019);高校博士点新教师基金(No.200805331085)

摘　　要：目的:用一种精确有效的方法实现T波终点检测。方法:对心电信号进行小波变换,定位R波后,通过准确地定位T波的检测区间,避免心率和P波的影响,在确定的区间上根据模极值检测出所有T波的顶点,用一种简单实用的几何方法检测出T波的终点。将本文的算法用于QT数据库中,评价实验结果。结果:本文的算法标注能力为(-0.35225±18.5869)ms,达到甚至超过了QT数据库里专家手工标注的水平。结论:文中采用T波终点检测的方法在存在噪声和基线漂移以及T波形态多变的情况下鲁棒性都比较好,并且计算简单,易于实现。Purpose： To realize the detection of T-wave end with an efficient and accurate method. Methods： R-wave was located using wavelet transforming, and then the T-wave detection interval was identified accurately by avoiding the influence of heart rate and P-wave. In addition, T-wave peaks were determined referring to the modulus maxima in the interval. Based on these, the T-wave end was located with a simple and practical geometrical method, which was applied for the evaluation of QT database. Results： The positioning capability of the above-mentioned method reached to （-0.35225＋18.5869） ms which was comparable or even better than those manual annotations from QT database by cardiologists. Conclusions： The experimental results showed that our algorithm for T-wave end detection is robust to noise, baseline drift and waveform morphological variations, and easy to calculate and to realize.

关 键 词：T波终点 小波变换 几何方法 检测区间 

分 类 号：R318.04[医药卫生—生物医学工程] R540.41[医药卫生—基础医学]