The influence of window size of autocorrelation function on fetal heart rate variability measurement using the Doppler ultrasound signal

• Autorzy: Roj D. , Fuchs T. , Przybyła T. , Jeżewski M. , Matonia A. , Gacek A.
• Języki publikacji: EN

Abstrakty

EN

Commonly used noninvasive fetal monitoring is based on fetal heart rate (FHR) variability analysis of the Doppler ultrasound signal coming from the mechanical activity of the fetal heart. Estimation of periodicity of acquired signals using the autocorrelation technique is very important. The determination of cardiac intervals using the Doppler signal is more difficult than in electrocardiography, where the R-waves are evident. We investigated the influence of the autocorrelation window size on the FHR variability analysis. The indices describing the FHR variability calculated for signals obtained using two different autocorrelation techniques with various window lengths were compared with the reference ones obtained from fetal electrocardiogram. The optimal window was a compromise between artifacts resistance and the averaging level of instantaneous variability.

Słowa kluczowe

EN

fetal monitoring; fetal heart rate; Doppler ultrasound; autocorrelation function

PL

monitoring płodu; tętno płodu; USG Dopplera; funkcja autokorelacji

• Wydawca: University of Silesia, Institute of Informatics, Computer Systems Department
• Czasopismo: Journal of Medical Informatics & Technologies
• Rocznik: 2008
• Tom: Vol. 12
• Strony: 111--116
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Roj D.

• Department of Biomedical Informatics, Institute of Medical Technology and Equipment, 118 Roosevelt Str., Zabrze, PL-41800,

autor

Fuchs T.

autor

Przybyła T.

autor

Jeżewski M.

autor

Matonia A.

autor

Gacek A.

Bibliografia

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• [2] JEZEWSKI J., KUPKA T., HOROBA K., Extraction of fetal heart rate signal as time event series from evenly sampled data acquired using Doppler ultrasound technique. IEEE. Trans. Biomed. Eng., pp. 805–810, 55, 2008.
• [3] JEZEWSKI J., WROBEL J., HOROBA K., Comparison of Doppler ultrasound and direct electrocardiography acquisition techniques for quantification of fetal heart rate variability. IEEE. Trans. Biomed. Eng., pp. 855–864, 53, 2006.
• [4] PETERS Ch., TEN BROEKE E. D., ANDRIESSEN P. et al., Beat-to-beat detection of fetal heart rate: Doppler ultrasound cardiotocography compared to direct ECG cardiotocography in time and frequency domain. Physiol. Meas., pp. 585–593, 25, 2004.
• [5] VAN GEIJN H. P., Analysis of heart rate and beat-to-beat variability: Interval difference index. Am. J. Obstet. Gynecol., pp. 246–252, 138, 1980.