Doppler optical coherence tomography (OCT) offers additional flow velocity information, which extends the application of OCT. Phase wrapping is the inherent problem that limits measureable range of Doppler OCT. We propose a phase unwrapping method which is suitable for correcting phase in Doppler OCT images. Points (pixels) in flow region are divided into groups according to the radial distance. Points in the same group are supposed to have close velocity. Phase unwrapping algorithm begins at the boundary layer group and is performed sequentially toward the center. Using the proposed criterion, points in a group are separated into two categories, signal points and noise points. Wrapping rounds are determined for signal points phase unwrapping. Mean value of the corrected signal points replaces the noise points for noise reduction. The method is validated with capillary tube flow phantom and in vivo blood flow.

中文翻译：

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多普勒光谱域光学相干断层扫描流量测量的相位展开。

多普勒光学相干断层扫描（OCT）提供了附加的流速信息，从而扩展了OCT的应用范围。相位包裹是固有的问题，它限制了多普勒OCT的可测量范围。我们提出一种相位解缠方法，该方法适用于校正多普勒OCT图像中的相位。根据径向距离将流动区域中的点（像素）分为几组。同一组中的点应该具有接近的速度。相位展开算法从边界层组开始，并朝中心顺序执行。使用建议的标准，将一组中的点分为两类，信号点和噪声点。为信号点相位解缠确定包裹回合。校正后的信号点的平均值代替了噪声点以降低噪声。