Fig. 7
From: A review on diagnostic assessments of tracheal stenosis
OCT image of pediatric trachea, represented in polar coordinates (A) and cropped segment of Cartesian coordinates (B). A = anterior, T = tracheal cartilage, E = epithelium, BM = basement membrane, LP = lamina propria; double arrow = probe sheath, single arrows = endotracheal tube inner/outer wall. Bar = 500 μm, reprinted with permission from [76]