Figure 3: Diffuse Borders Produces from Solid Scaffolding in Air. The scaffolding is made of polylactide-co-glycolide (PLGA) and is commonly used in tissue engineering. PGLA is both a strong scatterer, is large relative to the wavelength, and has a high refractive index relative to air or saline. The red arrows in the Figure show false information (diffuse borders) distal to the imaging probe.