Fig. 1
From: Optical coherence tomography angiography at the acute phase of optic disc edema
Data processing algorithm overview. (a) RPC (from ILM to RNFL) angiography slab from angiography 6 × 6 mm2 scan. (b) Vessel binary image where the large retinal vessels have been removed. (c) Vessel density and flux index metrics calculation. VD and FI are calculated within the red annulus with inner and outer diameters of 2 mm and 6 mm, respectively. Values are reported for four superior, nasal, inferior, and temporal quadrants and the entire annulus. RPC, retinal peripapillary capillaries; ILM, internal limiting membrane; RNFL, retinal nerve fiber layer; VD, vessel density; FI, flux index