基于皮肤电极的ERG检测系统设计与实现

Design and Implementation of ERG Detection System Based on Skin Electrodes

视觉电生理已有国际电生理临床检查标准。其中,视网膜电图(Electroretinography,ERG)检查有着更为广泛的应用。为了减轻传统ERG采集方法对人眼造成的危害以及克服该方法的一些不足。本文设计了一种基于皮肤电极的ERG检测系统。该系统包括视网膜刺激器、模拟滤波和放大电路、24位模数转换模块和数字信号处理模块,并选择了10名志愿者来接受视网膜电图检测。最后将得到的视网膜电图与标准的视网膜电图比较,试验结果表明通过外表皮肤电极采集到的ERG信号和临床实践的角膜ERG电极采集到的ERG信号有着基本相同的特征信息。

The clinical examination standard of visual electrophysiology already exists.The electroretinogram(ERG)has a more extensive application among them.In order to alleviate the harm caused by the traditional ERG acquisition method and overcome some shortcomings of traditional method.This paper designed and implemented an ERG detection system based on skin electrodes.The designed system includes a retinal stimulator,analog filter,analog amplifier,24bits analog-to-digital conversion module and digital signal processing module.Ten volunteers were selected to receive the detection of the retina.Finally,the obtained ERG and standard traditional ERG were compared.The experimental results showed that the ERG signal collected by the skin electrodes contained similar characteristic information of the traditional ERG signal.