Phanphaisarn W, Roeksabutr A, Wardkein P, Koseeyaporn J, Yupapin Pp
Department of Telecommunication Engineering, Faculty of Engineering, Mahanakorn University, Nongjok, Bangkok, Thailand.
Med Devices (Auckl). 2011;4:133-44. doi: 10.2147/MDER.S23324. Epub 2011 Aug 26.
A new design of a system for preliminary detection of defective hearts is proposed which is composed of two subsystems, in which one is based on the relationship between the electrocardiogram (ECG) and phonocardiogram (PCG) signals. The relationship between both signals is determined as an impulse response (h(n)) of a system, where the decision is made based on the linear predictive coding coefficients of a heart's impulse response. The other subsystem uses a phase space approach, in which the mean squared error between the distance vectors of the phase space of the normal heart and abnormal heart is judged by the likelihood ratio test (Λ) value, on which the decision is made. The advantage of the proposed system is that a heart's diagnosis system based on the ECG and EPCG signals can lead to high performance heart diagnostics.
提出了一种用于心脏缺陷初步检测的系统新设计，该系统由两个子系统组成，其中一个基于心电图（ECG）和心音图（PCG）信号之间的关系。这两个信号之间的关系被确定为一个系统的脉冲响应（h(n)），其中决策是基于心脏脉冲响应的线性预测编码系数做出的。另一个子系统使用相空间方法，其中通过似然比检验（Λ）值判断正常心脏和异常心脏相空间距离向量之间的均方误差，并在此基础上做出决策。所提出系统的优点是基于ECG和EPCG信号的心脏诊断系统能够实现高性能的心脏诊断。
