Silesian University of Technology, Institute of Electronics, 16 Akademicka Str., 44-100 Gliwice, Poland.
Comput Methods Programs Biomed. 2011 Oct;104(1):1-9. doi: 10.1016/j.cmpb.2010.07.004. Epub 2010 Aug 10.
In this paper we propose a new structure of the instrumentation for electrocardiographic fetal monitoring. We apply a single-channel approach to maternal electrocardiogram suppression in the recorded four abdominal bioelectric signals. Then we exploit spatial and temporal properties of the extracted four-channel fetal electrocardiogram to construct a new channel with higher signal-to-noise ratio. Finally, we perform detection of fetal QRS complexes. The proposed approach is investigated with the help of the constructed database of the maternal abdominal signals. During the detection tests, the spatio-temporal filtering allowed us to decrease significantly the number of the detection errors of different detectors applied. Moreover, we present visually that even if the fetal QRS complexes are buried in noise, the spatio-temporal filtering can produce the signal with the discernible ones.
在本文中，我们提出了一种新的胎儿心电图监测仪器结构。我们应用单通道方法抑制记录的四个腹部生物电信号中的母体心电图。然后，我们利用提取的四通道胎儿心电图的空间和时间特性来构建一个具有更高信噪比的新通道。最后，我们进行胎儿 QRS 复合波的检测。该方法通过构建的母体腹部信号数据库进行研究。在检测测试中，时空滤波显著减少了应用于不同检测器的检测错误的数量。此外，我们还展示了即使胎儿 QRS 复合波被噪声淹没，时空滤波也可以产生可辨别的信号。
