Figure 2

Comparison of characteristic vessel configurations of the oral mucosa imaged by optical coherence tomography angiography and incident dark field illumination. Vessels of the tongue papillae recorded by optical coherence tomography angiography (OCTA; (A), 0.75 × 0.75 mm) and incident dark field illumination (IDF; (B), 1.1 × 1.1 mm). Vascular loops of the sublingual microcirculation recorded by OCTA (C), 1.1 × 1.1 mm) and IDF (D), 1.1 × 1.1 mm).