Relationship between Neovascular Density in Swept Source-Optical Coherence Tomography Angiography and Signs of Activity in Exudative Age-Related Macular Degeneration

Figure 4

Clinically inactive hypodense choroidal neovascularization (CNV). (a) The swept source-optical coherence tomography angiography (SS-OCTA; DRI Triton, Topcon) en-face layer displayed filamentous well-defined vessels (arrows) with blunt endings (arrow-heads) in the absence of branching capillaries, intervascular anastomoses, and peripheral arcades in (b) an outer retina 4.5 × 4.5 mm segmentation image. (c) An underlying 4.5 × 4.5 mm choriocapillaris cube illustrated the CNV structure embedded in a dark nonvascularized halo with projection artefacts corresponding to the superficial retinal plexus of (d) the OCT B-scan slab. (e) An infrared picture of the quiescent macular region with isolated drusen but no signs of activity. (f) The spectral domain-OCT B-scan (Cirrus HD 4000, Zeiss) repeatedly demonstrated subfoveal flat irregular pigment epithelial detachment (arrows) without fluid in addition to disintegrated outer retinal architecture (arrow-heads).