DocumentCode :
3036286
Title :
Empirical mode decomposition (EMD) for multi-gate, multi-transducer ultrasound Doppler fetal heart monitoring
Author :
Rouvre, Denis ; Kouamé, Denis ; Tranquart, Francois ; Pourcelot, Léandre
Author_Institution :
LUSSI CNRS FRE, Tours Univ.
fYear :
2005
fDate :
21-21 Dec. 2005
Firstpage :
208
Lastpage :
212
Abstract :
This paper presents a new technique called empirical mode decomposition (EMD) applied to a multi-gate, multitransducer ultrasound Doppler system used for fetal heart monitoring. We propose this system as an alternative to the existing fetal monitoring techniques. Classical autocorrelation-based fetal heart rate (FHR) detection has been shown to be a good method to detect the FHR in normal situations. However, as this method is applied to magnitudes of the Doppler signal fails to estimate the fetal heart rate when the fetus moves. In view of the extent of FHR variability, a monitoring system should be able to estimate this parameter each time. We therefore propose empirical mode decomposition as an interesting alternative for long-term monitoring. The principle of this method consists of iterative decompositions of a signal into a sum of functions that have the same number of extrema, the same number of zero crossings, and are symmetric with respect to the local mean. When investigation of FHR using autocorrelation on the original Doppler signal fails due to fetal movement or low signal-to-noise ratio (SNR), it is frequently successful using the intrinsic mode functions (imfs). We compared the results of multi-transducer FHR detection with and without EMD decomposition using in-vivo Doppler signals from a set of 40 women between 32 and 38 weeks of pregnancy. This method greatly improved the quality of FHR detection
Keywords :
biomedical ultrasonics; cardiology; medical signal processing; patient monitoring; autocorrelation-based fetal heart rate; empirical mode decomposition; fetal heart monitoring; in-vivo Doppler signals; intrinsic mode functions; iterative decompositions; multitransducer ultrasound Doppler system; signal-to-noise ratio; Autocorrelation; Condition monitoring; Fetal heart; Fetal heart rate; Fetus; Heart rate detection; Iterative methods; Parameter estimation; Signal to noise ratio; Ultrasonic imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing and Information Technology, 2005. Proceedings of the Fifth IEEE International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-9313-9
Type :
conf
DOI :
10.1109/ISSPIT.2005.1577097
Filename :
1577097
Link To Document :
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