The Calculation of the Electroretinographic Power.

Won, Chul HO; Cho, Jin Ho; Kim, Sang Ha; Lim, Jung Hoon

Original Article

Journal of the Korean Ophthalmological Society 1997;38(5):817-823.
Published online May 1, 1997.

The Calculation of the Electroretinographic Power.

Chul HO Won, Jin Ho Cho, Sang Ha Kim, Jung Hoon Lim

¹Department of Ophthalmology, School of Medicine, Kyungpook National University, Taegu, Korea.
²Department of Electronics, College of Engineering, Kyungpook National University.

망막전위도의 전력 산출

원철호(Chul Ho Won),조진호(Jin Ho Cho),김상하(Sang Ha Kim),임정훈(Jung Hoon Lim)

Abstract

To promote the electrophysiologic diagnostic efficiency, the program for calculation of the total power in the frequency domain and of the area in the time domain of the electroretinogram was designed. The total power is calculated by integration of the squared power spectrum obtained by Fourier transform (Parseval theorem) in the time domain. The dominant power is the power of the dominant frequency in power spectrum and is calculated by integration of the squared peak area spectrum. The sectional inegration of the squared power spectrum can be established by manual input. The inplemented software also has the functions that calculate the summed amplitud and area of the oscillatory potentials in the time domain. And it performs each functions by selection of pop-up menu with mouse to use conveniently under graphic interface, compatible with UTAS-E2000 system.

Key Words: Ara;Electroretinogram;Fourier transform;Total power