Abstract
This paper presents an application of the continuous wavelet transform (CWT) in the analysis of electrogastrographic (EGG) signals. Due to the nonstationary nature of EGG signals, the CWT method, which uses multiresolution scaled windows, gives a better time-frequency resolution than the short-time Fourier transform, which uses a fixed window. Spike activity due to gastric contraction was investigated through experiments on dogs. During spike activity we observed an increase in magnitude of the slow wave and the appearance of a low frequency component with half the frequency of the slow wave. Studies of the EGG signals from the small intestine are also presented to investigate the hypothesis that its slow wave might be confounded with spike activity in the stomach due to the similarity of their frequency ranges. © 1998 Biomedical Engineering Society.
PAC98: 0230-f, 8759Wc
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
Chen, J., and W. McCallum. Electrogastrographic parameters and their clinical significance. In: Electrogastrography: Principles and Applications, edited by J. D. Chen and R. W. McCallum. New York: Raven, 1994, pp. 45-73.
Chen, J., R. W. McCallum, and R. Richards. Frequency com-ponents of the electrogastrogram and their correlations with gastrointestinal contractions in humans. Med. Biol. Eng. Comput.31:60-67, 1993.
Christensen, J., and D. L. Winlgate. A Guide to Gastrointestinal Motility. Littleton, MA: John Wright PSG, 1983.
Chui, C. K. An Introduction to Wavelets. Boston: Academic, 1992.
Grundy, D. Gastrointestinal Motility: The Integration of Physiological Mechanisms. Hingham, MA: MTP, 1985.
Kim, C. H., R. B. Hanson, T. L. Abell, and J. R. Malagelada. Effect of inhibition of prostaglandin synthesis on epinephrine-induced gastroduodenal electromechanical changes in humans. Mayo Clinic Proc.64:149-157, 1989.
Kingma, Y. J., The electrogastrogram and its analysis. In: Critical Reviews in Biomedical Engineering. Boca Raton, FL: CRC, 1989, Vol. 17, pp. 105-132.
Meyer, Y., Wavelets: Algorithms and Applications. Philadelphia: SIAM, 1993.
Oppenheim, A. V., and R. W. Schafer. Discrete-Time Signal Processing. Englewood Cliffs, NJ: Prentice-Hall, 1989.
Smout, A. J. P. M., H. J. A. Jebbink, and M. Samsom. Acquisition and analysis of electrogastrographic data. In: Electrogastrography: Principles and Applications, edited by J. D. Chen and R. W. McCallum. New York: Raven, 1994, pp. 75-99.
Stern, R. M., K. L. Koch, and W. R. Stewart. Spectral analysis of tachgastria recorded during motion sickness. Gastroenterology92:92-97, 1987.
You, C. H., and W. Y. Chey. Study of electromechanical activity of the stomach in humans and in dogs with particular attention to tachygastria. Gastroenterology86:1460-1468, 1984.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Qiao, W., Sun, H.H., Chey, W.Y. et al. Continuous Wavelet Analysis as an Aid in the Representation and Interpretation of Electrogastrographic Signals. Annals of Biomedical Engineering 26, 1072–1081 (1998). https://doi.org/10.1114/1.27
Issue Date:
DOI: https://doi.org/10.1114/1.27