Fig. 2.

(a) Ex-vivo OCT B-scan image of ciliated epithelium from human trachea (Sample 5) and (b) corresponding histology. (c) The Maximum Intensity Projection of the FC-RPCA sparse output painted over the image in (a) using MATLAB’s jet colormap. (d) A closer look at a dense area of cilia located directly under a mucus cloud from (c). In contrast, (f) examines a sparsely populated area of cilia where the cells may be damaged or non-functioning. (e) and (g) are closer views of the histology corresponding to (d) and (f), respectively. The locations of these two regions are marked with the corresponding figure letter in the full view histology (b) and OCT B-scan (c) images. Colorbar indicates normalized intensity of the FC-RPCA sparse component. The arrows and corresponding labels mark key physiological regions (CE = ciliated epithelium, BM = basement membrane, M = mucus).