Figure 8: Illustration of the projection-resolved (PR) optical coherence tomography angiography (OCTA) algorithm. | Scientific Reports

Figure 8: Illustration of the projection-resolved (PR) optical coherence tomography angiography (OCTA) algorithm.

From: Detailed Vascular Anatomy of the Human Retina by Projection-Resolved Optical Coherence Tomography Angiography

Figure 8

(A) and (D) Composite cross-sectional (B-scan) images before (A) and after (D) projection resolution. In these two images, suprathreshold decorrelation signal (red) is overlaid on the structural OCT (gray scale). The threshold distinguishes flow from background noise and is based on noise statistics. (B) Original axial profile of reflectance-normalized decorrelation signal (C) The projection resolution algorithm retains suprathreshold reflectance-normalized decorrelation signal that are higher than all voxels above (voxels classified as in situ flow in real vessels) and sets the remaining signal to zero (classified as flow projection artifacts).

Back to article page