FIG. 8.

Photoacoustic imaging to track cells and monitor neovascularization. (A) In vitro photoacoustic microscopy images to evaluate the distribution of melanoma cells seeded in PLGA inverse opal scaffolds under different culture conditions. Reprinted with permission from Zhang et al.¹¹² (B) Optical-resolution photoacoustic microscopy (top), OCT (middle), and combined (bottom) images of neovascularization within inverse opal scaffolds implanted in a mouse ear model. Reprinted with permission from Cai et al.¹¹⁵ (C) Combined ultrasound and spectroscopic photoacoustic imaging of gold nanoparticle-labeled mesenchymal stem cells intramuscularly injected within a PEGylated fibrin hydrogel. Reprinted with permission from Nam et al.¹¹⁸ Color images available online at www.liebertpub.com/teb