A novel approach for Doppler blood flow measurement.
A novel approach for Doppler blood flow measurement.
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多普勒血流测量的新方法。
DOI：
10.1109/iembs.2008.4649553
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Ziarani,AK
中科院分区：
文献类型：
--
作者：
McNamara,DM;Goli,A;Ziarani,AK
提出了一种新的多普勒超声血流分析中速度估计的频率估计方法。该方法的基础是一个自适应正弦跟踪算法，这是有效的，在提取非平稳信号从噪声和估计其随时间变化的参数，如频率，随着时间的推移。使用模拟信号进行的初步研究表明，这种方法在噪声条件下估计多普勒频移的潜力。与短时傅立叶变换（STFT）的定性比较，显示所提出的技术的优点，STFT。与传统的时频分析方法相比，该方法具有较高的时频分辨率和抗噪能力。
A new approach to frequency estimation for the velocity estimation in Doppler ultrasound blood flow analysis is presented. The basis of the approach is an adaptive sinusoid-tracking algorithm which is effective in extracting nonstationary signals from within noise and estimating their time-varying parameters, such as the frequency, over time. The preliminary studies conducted using simulated signals show the potential of this approach in estimating Doppler frequency shifts under noisy conditions. A qualitative comparison with the short-time Fourier transform (STFT) is presented to show the advantages of the proposed technique over the STFT. The proposed approach offers advantages over conventional time-frequency analysis techniques in terms of high time-frequency resolution and high noise immunity.