视网膜电图振荡电位的提取分析方法  

Analysis of Oscillatory Potentials of Flectroretinogram

作　　者：余敏忠[1] 梁小玲[1] 吴德正[1] 

机构地区：[1]卫生部眼科实验室中山医科大学中山眼科中心,510060

出　　处：《中国医疗器械杂志》1998年第6期336-339,345,共5页Chinese Journal of Medical Instrumentation

摘　　要：阐述一种视网膜电图振荡电位的频域和时域分析法，并用此法分析了9例9只视网膜分支静脉阻塞患眼、9例9只视网膜中央静脉阻塞患眼和40只正常对照眼的视网膜电图振荡电位。它对视网膜电图振荡电位作快速傅里叶变换得到视网膜电图振荡电位的频谱、总功率、最大振幅、最大功率和主频率；通过快速傅里叶反变换把OPs频率成分转换成时域的OPs波形，再测量OPs四个子波的潜伏期、振幅以及四个子波的振幅总和。This study presents a method for the analysis of oscillatory potentials (OPs) of electroretinogram (ERG) in frequency domain and time domain. OPs from 9 cases (9 eyes) of branch retinal vein occlusion, 9 cases (9 eyes) of central retinal vein occlusion and 40 normal control eyes were tested. The frequency spectra of the OPs were derived through Fast Fourier Transform. The mean frequency spectra, the total power,the maximum magnitude,the maximum power and the dominant frequency in frequency domain of the OPs were calculated. The OPs waveforms were re-constructed with the OPs frequency spectra data by counter-Fast Fourier Transform. In time domain, the latencies, the amplitudes and the sum of the amplitudes of the four peaks of OPs were measured.

关 键 词：视网膜电流图 振荡电位 频域分析法 提取分析 

分 类 号：R770.43[医药卫生—眼科]