Full velocity range cross-correlation angiography

In this paper, a full velocity range cross-correlation angiography method is proposed. The time cross-correlation technique is used to estimate the frequency of particle motion, and the maximum value of cross-correlation is used to image the particles with the same motion velocity separately, so as to provide vascular images with different velocities and realize full velocity range angiography. Compared with traditional optical coherence tomography angiography, the method proposed in this paper has higher imaging sensitivity, and can independently image particles with different moving speeds. The wide range of velocity imaging and the higher connectivity of the extracted microvascular network make this method of potential application value for the study of blood flow diseases.