Preprocessing for Spectral Analysis of Electrogastrogram

摘要

Electrogastrographic examination (EGG) can be considered as a noninvasive method for an investigation of a stomach slow wave propagation [1][2]. The EGG signal is noninvasively captured by appropriately placed electrodes on the surface of the stomach. The typical range of frequency for EGG signal is from 0.015Hz to 0.15Hz. One of EGG signal analyzing method is based on a determination of dominant harmonic frequencies contained in the chosen segments of EGG signal. The dominant frequency is used for calculation base parameters of EGG signal. This paper presents the method to determine dominant frequencies and also shows the details of preprocessing of EGG signal for spectral analysis.