[Parameter optimization of body surface laplacian electrodes in bioelectricity detection].
In this article, some details about the parameter optimization of body surface Laplacian electrodes are presented theoretically and practically. The influence of these parameters on the performance of the electrodes is studied to derive some rules which have to be obeyed during the design. An evaluation routine based on relative error analysis and the noise level of amplifier is prompted. Furthermore, the paper particularly indicates that, it would be helpful to reduce the relative error when assuming that the effective radius b is equal to the inner radius r(i) of the ring electrode. Finally, we suggest that in the presence of weak bioelectrical signals, the effective radius of the electrodes should be reasonably increased in order to improve signal-to-noise ratio (SNR).
He
Feng
F
College of Precision Instrument & Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China. heaven@tju.edu.cn
Li
Gang
G
Lin
Ling
L
D018780:Body Surface Potential Mapping / Q000379:methods*; D017097:Electric Impedance; D004566:Electrodes; D006801:Humans; D012815:Signal Processing, Computer-Assisted