Figure 6.

STOC-T Imaging of the choroid – coronal sectioning

(A) ICG angiography image exposes mostly the large vessels of Haller’s layer.

(B) A representative cross-sectional image with the locations of arbitrarily selected projections from the choroid thickness marked by color bars displayed in panels (C)-(G).

(C–G) Contrast-inverted (I.C.) projections derived by averaging STOC-T structural en face images (20 μm thick) in the indicated axial range below a line demarcating the RPE and Bruch’s membrane. The images in the range of 10 μm–70 μm represent the Sattler’s layer, and below that the Haller’s layer. Vessel diameter can be seen increasing with the imaging depth.

(H) Zoomed-in ROI I - ROI III areas marked with red boxes in panels (C) and (E); corresponding STOC-T angiography reconstructions are shown in the adjacent panels, revealing more details; I.C.-contrast inverted projections.

(I) corresponding choroidal Images acquired with swept-source OCT (Triton, Topcon) at the depth of 20 μm and 55 μm for inverted contrast and angio-OCT reconstructions.