(a)
(b)
(c)
Figure 3: Optical coherence tomography findings of EMR-treated cartilage: (a) control specimens, baseline image without gold nanoparticles (green arrows); (b) baseline image with gold nanoparticles (yellow arrows); (c) after application of 6 V for 3 mins. Image of EMR-treated cartilage with gold nanoparticles (red arrows).