胃电图的时频表示——指数分布的应用

Time-frequency representation of the electrogastrogram--application of the exponential distribution.

作者信息

Lin Z Y, Chen J D

机构信息

University of Virginia Health Science Center, Charlottesville 22908.

出版信息

IEEE Trans Biomed Eng. 1994 Mar;41(3):267-75. doi: 10.1109/10.284945.

DOI:10.1109/10.284945

PMID:8045579

Abstract

The aim of this paper was to examine the applicability of the exponential distribution for the time-frequency representation of the electrogastrogram (EGG). The EGG is a noninvasive measurement of the electrical activity of the stomach by placing electrodes on the abdominal skin. Quantitative analysis of the EGG has relied on spectral methods. The normal frequency of the EGG in humans is 3 cycles/min. Electrical dysrhythmia observed in the EGG is associated with motor disorders of the stomach. The exponential distribution was applied in this work for the estimation of EGG frequency and the detection of dysrhythmia in the EGG. A series of computer simulations was conducted, demonstrating the reliability of the exponential distribution in the analysis of nonstationary electrical signals of the stomach. Applications of the exponential distribution in the spectral analysis of typical EGG's were presented. The results showed that there is a great potential for the use of the exponential distribution in EGG analysis.

摘要

本文旨在研究指数分布在胃电图（EGG）时频表示中的适用性。EGG是通过将电极置于腹部皮肤上来对胃电活动进行的无创测量。EGG的定量分析一直依赖于频谱方法。人类EGG的正常频率为每分钟3个周期。在EGG中观察到的电节律失常与胃部运动障碍有关。在这项工作中，指数分布被用于估计EGG频率以及检测EGG中的节律失常。进行了一系列计算机模拟，证明了指数分布在分析胃部非平稳电信号方面的可靠性。展示了指数分布在典型EGG频谱分析中的应用。结果表明，指数分布在EGG分析中具有很大的应用潜力。