Cao Yuzhen, Jin Shijiu, Chen Min, Li Gang
School of Precision Instrument and Opto-Electronic Engineering, Tianjin University, Tianjin 300072, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2007 Aug;24(4):768-71.
Surface Laplacian of the body surface potential (Laplacian ECG--LECG) is a new approach to resolve spatially distributed bioelectrical source. In this paper, we discussed an LECG sensor which integrated triple concentric ring electrodes and signal adjustor on a printed board. The LECG is measured directly by this sensor. The frequency, amplitude and phase of the power line interference were detected by a nonlinear adaptive filter so that interference was eliminated. The wavelet shrinking technique was used to eliminate the rest of random noise. And we got the high quality LECG signal. It laid the foundation for heart disease diagnosis.
体表电位的表面拉普拉斯算子（拉普拉斯心电图——LECG）是一种解析空间分布生物电源的新方法。在本文中，我们讨论了一种在印刷电路板上集成了三层同心环电极和信号调节器的LECG传感器。通过该传感器直接测量LECG。利用非线性自适应滤波器检测电源线干扰的频率、幅度和相位，从而消除干扰。采用小波收缩技术消除其余的随机噪声。我们得到了高质量的LECG信号。这为心脏病诊断奠定了基础。
