Abstract
The electrogastrogram (EGG), a cutaneous recording of electrical activity in the stomach is a mixture of 3 cycle per minute (3 cpm) gastric pacesetter potential known as slow wave, electrical activity from other organs and noise. Proper slow wave propagation is responsible for gastric peristaltic contractions, which are the basis for emptying of solids from stomach. Delay in the stomach emptying leads to some gastric disorders such as bloating, vomiting or nausea. To assess the slow wave propagation it is necessary to obtain slow wave in each channel of multichannel EGGs. In this paper combined methods: Independent Component Analysis (ICA) and adaptive filtering in the cosine transform domain was proposed to gain a purified EGG signal from each channel. Time shift between EGG signals from various channels was estimated by means of cross covariance analysis performed after adaptive filtering of each channel with reference signal obtained from blind sources separation by ICA algorithm. The effectiveness of that proposed methods was at first validated for the synthetic data and after was applied for human EGG, recorded before and after food stimulation.
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Mika, B.T., Tkacz, E.J. (2016). Assessment of Slow Wave Propagation in Different Phases of Food Stimulation in the Multichannel Electrogastrographic Signal (EGG). In: Piętka, E., Badura, P., Kawa, J., Wieclawek, W. (eds) Information Technologies in Medicine. ITiB 2016. Advances in Intelligent Systems and Computing, vol 471. Springer, Cham. https://doi.org/10.1007/978-3-319-39796-2_27
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DOI: https://doi.org/10.1007/978-3-319-39796-2_27
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