Fig. 1.

Flow chart for attenuation correction assisted automatic segmentation of choroid and visualization of choroidal vasculature. Signals in regular OCT B-scans (A) were converted to OAC (B) with enhanced contrast. The image was flattened at Bruch’s membrane that was fitted as the convex hull of the RPE bottom (C). Outer boundaries of the choroidal vessels were detected through a graph search (D) and were fitted for the choroidal-sclera interface via P-spline fitting (E). A choroidal thickness map (F) and vasculature map (G) were generated from the segmented choroidal slab. (Scale bar: 2 mm).