Doppler angle and flow velocity mapping by combined Doppler shift and Doppler bandwidth measurements in optical Doppler tomography.
Doppler angle and flow velocity mapping by combined Doppler shift and Doppler bandwidth measurements in optical Doppler tomography.
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DOI：
10.1364/ol.28.001120
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发表时间：
2003-07
期刊：
影响因子：
3.6
通讯作者：
D. Piao;L. Otis;Quing Zhu
中科院分区：
文献类型：
--
作者：
D. Piao;L. Otis;Quing Zhu
血流速度的准确估计需要测量多普勒角，而这在一般的临床应用中是不可用的。我们描述了一种利用传统的单光束光学多普勒层析成像系统直接绘制多普勒角和流速图的新方法。通过结合多普勒频移和多普勒带宽测量来估计多普勒角，并根据多普勒频移和估计的多普勒角来计算流速。活体唇部微血管研究表明，该方法能够同时提供血流速度和血流方向信息。
Accurate estimation of flow velocity requires measurement of Doppler angle, which is not available in general clinical applications. We describe a novel method of direct Doppler angle and flow velocity mapping that uses a conventional single-beam optical Doppler tomography system. The Doppler angle is estimated by combination of Doppler shift and Doppler bandwidth measurements, and flow velocity is calculated from the Doppler shift and the estimated Doppler angle. In vivo study of lip microvascularization demonstrates that this method is capable of providing both flow speed and flow direction information.