Figure 1: Scanning electron microscopy of modified vascular prostheses. Bare polyethylene terephthalate prosthesis (PET) (A and F); commercial collagen-impregnated PET prosthesis (B and G); PET impregnated with poly (L-lactide-co-glycolide) (PLG) (C and H); PET impregnated with poly (L-lactide-co-glycolide-co-ε-caprolactone) (PLGC) (D and I); PET coated with collagen type I (Co) and fibrin gel (Fb) (E and J). NOVA nanoSEM 200, FEI, USA, magnification 400× and bar=300 μm (A-E), 2000× and 50 μm (F-J).