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Phase-resolved Doppler optical coherence tomography--limitations and improvements

机译:相分辨多普勒光学相干断层扫描-局限性和改进

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摘要

We describe how the simple phase difference averaging causes a systematic bias in the velocity estimation obtained by phase-resolved Fourier domain optical coherence tomography (FdOCT). The magnitude of this bias depends on the signal-to-noise ratio as well as proximity of the measured velocity to the limits of the velocity range. We demonstrate the proper way of data processing, which enables obtaining velocity values free of this error. We validate the improved technique by measurements of flow velocity in glass capillaries, in human retinal vessels, and we compare the results with those obtained by standard phase-resolved FdOCT.
机译:我们描述了简单的相位差平均如何在通过相位分辨傅里叶域光学相干断层扫描(FdOCT)获得的速度估计中引起系统偏差。该偏差的大小取决于信噪比以及测得的速度与速度范围极限之间的接近程度。我们演示了正确的数据处理方法,该方法可以获取没有该误差的速度值。我们通过测量人视网膜血管中玻璃毛细管中的流速来验证改进的技术,并将结果与​​标准相分辨FdOCT获得的结果进行比较。

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