多普勒血流信号最大频率曲线的特征分析及应用

文章主要研究从超声多普勒血流信号的最大频率曲线中提取特征值，并用于临床血管疾病诊断的方法。先利用短时傅里叶变换分析采样所得的音频多普勒血流信号，接着用百分比法得到信号的最大频率曲线，然后提取最大频率曲线频谱各峰值的比作为特征值，并将它们用于血管疾病的诊断。通过对颈动脉多普勒血流信号的临床分析表明：此方法比传统的声谱参数法有更高的诊断准确性。

Feature analysis of the maximum frequency waveform from blood flow Doppler signals and its application

In this paper, a novel method was studied to diagnose the vessel disease using the feature of the maximum frequency waveform from the blood flow ultrasound Doppler signals. The sampled audio Doppler flow signals were analyzed using the short time Fourier transform. Then the percentile method was used to obtain the maximum frequency waveform from whose spectrum feature values were extracted to diagnose the vessel disease. From the clinical analysis of Doppler flow signals from the common carotid arteries, it was shown that the method described here gave a higher diagnosis accuracy than the conventional method, the sonogram parameter method.