title: Rejection of the maternal electrocardiogram in the electrohysterogram signal.
abstract: The electrohysterogram (EHG) signal is mainly corrupted by the mother's electrocardiogram (ECG), which remains present despite analog filtering during acquisition. Wavelets are a powerful denoising tool and have already proved their efficiency on the EHG. In this paper, we propose a new method that employs the redundant wavelet packet transform. We first study wavelet packet coefficient histograms and propose an algorithm to automatically detect the histogram mode number. Using a new criterion, we compute a best basis adapted to the denoising. After EHG wavelet packet coefficient thresholding in the selected basis, the inverse transform is applied. The ECG seems to be very efficiently removed.
authors.affiliation: Department of Biomedical Engineering, UMR CNRS 6600, Compiègne University of Technology (UTC), France.
authors.forename: H
authors.initials: H
authors.lastname: Leman
authors.forename: C
authors.initials: C
authors.lastname: Marque
mesh_terms: D000465:Algorithms; D001698:Biomedical Engineering; D004562:Electrocardiography / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D011247:Pregnancy; D012815:Signal Processing, Computer-Assisted; D018590:Uterine Monitoring / Q000706:statistics & numerical data*