基于谱域光学相干层析术的互相关法测量空间横向流速

Cross-Correlation Method for Measuring Spatial Transverse Flow Rate Based on Spectral Domain Optical Coherence Tomography

提出了一种利用互相关性测量空间横向流速的方法。通过设定谱域光学相干层析术系统的扫描模式X和Y,利用同一深度位置的相邻A扫信号间的互相关性与空间横向速度分量之间的数学关系,求得空间横向流速的绝对大小。详细阐述了该方法的测量原理。通过毛细管模拟实验描绘了截面的横向流速分量分布,并验证了所测得的平均横向流速大小与用注射泵设定的值基本一致。

A method is proposed to use cross-correlation to measure the spatial transverse flow rate. By setting the scanning patterns X and Y based on the spectral domain optical coherence tomography, the absolute value of the flow rate is obtained according to the mathematical relation of the cross-correlation between the adjacent Ascans with the spatial transverse flow rate. The measuring principle of this method is elaborated. The transverse flow rate component distribution of the cross section is described through the simulation experiment using a capillary. It is demonstrated that the measured mean value of the transverse flow rate is in accordance with the set value using the syringe pump.