A guideline for Parameter Design of Body Surface Laplacian Electrodes and its Application in EGG Detection

The influence of dimension parameters on the performance of body-surface Laplacian electrodes is studied in this paper. Some rules about the parameter optimization design are presented. The investigation suggests that the effective radius b should be equal to the inner radius of the ring electrode in order to reduce the relative error. Besides, in the presence of weak bioelectrical signals, reasonably increasing b would be helpful to improve SNR. Furthermore, an evaluation method based on these principles is prompted, as an instance of which, feasibility of introducing surface Laplacian technique into EGG exploration is discussed