The Doppler fetal heart rate detection with wavelet transform.
- Author:
Yufeng ZHANG
1
;
Yi CAO
;
Kexin ZHANG
;
Wei YU
;
Xinling SHI
Author Information
1. Department of Electronical Engineering, Information School, Yunnan University, Kunming 650091, China. yfengzhang@yahoo.com
- Publication Type:Journal Article
- MeSH:
Female;
Fetal Monitoring;
Heart Rate, Fetal;
physiology;
Humans;
Pregnancy;
Signal Processing, Computer-Assisted;
Ultrasonography, Doppler;
methods;
Ultrasonography, Prenatal
- From:
Journal of Biomedical Engineering
2005;22(2):339-342
- CountryChina
- Language:Chinese
-
Abstract:
Various interference and noises should be eliminated while picking up the signal of fetal heart rate from the Doppler fetal signal in order to obtain smooth curve of the fetal heart Doppler signal and so to figure out the fetal heart rate. In this study, the mean frequency shift curve estimated from the Doppler fetal signals was smoothed using wavelet transform. The results showed that the fetal-heart rate obtained by computing from the autocorrelation waveform based on the smoothed mean frequency shift curve was more accurate than that based on unsmoothed curve.
