Figure 1.

Orthogonal polarization imaging of a microvascular network; the sublingual microvascular architecture. The image is divided in four quadrants (a, b, c and d) with examples of vessel classification: small (s; 10 to 25 μm); medium (m; 26 to 50 μm); large (l; 51 to 100 μm). Objective 5×, on screen 325×.