Figure 1 | Scientific Reports

Figure 1

From: Global Assessment of Retinal Arteriolar, Venular and Capillary Microcirculations Using Fundus Photographs and Optical Coherence Tomography Angiography in Diabetic Retinopathy

Figure 1

Measurement of retinal arteriolar, venular and capillary parameters. (a) Optic disc-centered fundus photograph of an eye with moderate non-proliferative diabetic retinopathy (DR). (b) The same photograph, using the Singapore I Vessel Assessment (SIVA) software, with the zone of measurement overlaid, and the skeletonized line tracing identifying arterioles (in red) and venules (in blue); This eye had a central retinal arteriolar equivalent (CRAE) of 143.6. (c) En face optical coherence tomography angiography (OCT-A) image of the superficial capillary vascular plexus (SVP) of an eye with no DR. (d) Binarized image of the SVP; This eye had an SVP capillary density index (CDI) of 0.38. (e) En face OCT-A image of the deep capillary vascular plexus (DVP) in the same eye. (f) Binarized image of the DVP; This eye had a DVP CDI of 0.38. (g) En face OCT-A image of the SVP of an eye with proliferative DR. (h) Binarized image of the SVP; This eye had an SVP CDI of 0.34. (i) En face OCT-A image of the DVP in the same eye. (j) Binarized image of the DVP; This eye had a DVP CDI of 0.35.

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