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. Author manuscript; available in PMC: 2019 Jul 1.
Published in final edited form as: Retina. 2018 Jul;38(7):1289–1300. doi: 10.1097/IAE.0000000000001863

Fig. 7.

Fig. 7

Normal Choroidal Vessels Artifactually Appearing in the Outer Retinal Slab of a Treatment-Naïve Eye with Geographic Atrophy (GA). A. OCT angiography (OCTA) of choriocapillaris and cross-sectional OCT with segmentation boundary lines. B. OCTA of outer retina and cross-section. Segmentation error (outer segmentation boundary displaced posteriorly in GA) as well as the anterior displacement of normal choroidal vessels cause vessels to appear in outer retina slab. C. En face structural OCT slab of the choroid used to select area of GA. D. Pseudo-colored OCTA of choriocapillaris and cross-sectional OCT with red flow overlay. In this figure, we added an extra post-processing step where blood vessels appearing in the outer retinal slab are pseudo-colored green and overlaid onto the choriocapillaris. Vessels with morphology suspicious for choroidal neovascularization (CNV) are highlighted by the circle. Blue arrow on the cross-sectional OCTA confirms that these vessels are below Bruch’s membrane and therefore not CNV.