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首页> 外文会议>SPIE Conference on Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine >Rotational Dove prism scanning dual angle Doppler OCT
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Rotational Dove prism scanning dual angle Doppler OCT

机译：旋转鸽子棱镜扫描双角度多普勒10月

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摘要

Traditional Doppler OCT is highly sensitive to motion artifacts due to the dependence on the Doppler angle. This limits its reproducibility in clinical practice. To overcome this limitation, we use a bidirectional technique with a novel rotating scanning scheme. The volume is probed simultaneously from two distinct illumination directions with variable controlled orientations, allowing reconstruction of the true flow velocity, independently of the vessel orientation. A Dove prism in the sample arm permits a rotation of the illumination directions that can be synchronized with the standard beam steering device. The principle is implemented with Swept Source OCT at 1060nm with 100,000 A-Scans/s. We apply the system to human retinal absolute blood velocity measurement by performing segment and circumpapillary time series scans around the optic nerve head. We also demonstrate microvasculature imaging by calculation of squared intensity differences between successive tomograms.
机译：传统的多普勒OCT由于对多普勒角度的依赖性而对运动伪影感高度敏感。这限制了临床实践中的重现性。为了克服这种限制，我们使用具有新颖旋转扫描方案的双向技术。从具有可变控制取向的两个不同的照明方向同时探测体积，允许重建真正的流速，独立于血管取向。样品臂中的鸽子棱镜允许旋转可以与标准光束转向装置同步的照明方向。该原理由1060nm以1060nm的扫描源1010次实现，100,000 A-Scans / s。我们通过在视神经头周围的段和环状时间序列扫描来将系统应用于人类视网膜绝对血液速度测量。我们还通过计算连续断层照片之间的平方强度差异来展示微孔化成像。

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