一种用于测量胎儿心率的改进自相关算法

An Improved Auto-correlation Method for Doppler Fetal Heart Rate Measurement

在围产期对胎儿心率进行监护是非常重要的 ,超声 Doppler测量胎心率是最常用的无创方法。但是 ,由于 Doppler信号成分很复杂 ,从而使信号处理比较困难。我们提出了一种改进的自相关方法—指数加权自相关方法 ,并在其中利用了自适应技术。通过临床试验发现 ,与以前的方法相比 ,使用这种方法从超声 Doppler信号中提取的胎心率较准确 。

It is very important to monitor the fetal heart rate in the clinical management of pregnancies antenatally. The most commonly employed non-invasive method uses Doppler ultrasound. Because of the complexity of Doppler fetal signals, the signal processing is difficult. In this paper, we describe an improved method for the determination of fetal heart rate from Doppler ultrasound signals. Using an exponentially weighted auto-correlation technique with an automatic adaptation algorithm, we have developed the method which can provide accurate fetal heart rate records, especially in the cases of reduced signal and loss of signal.