Fig. 4

In vivo PA imaging. A Intra-tumor PA imaging of Mn/N-HCN and sO₂ level after intravenous injection of Mn/N-HCN. Scale bar = 2 mm. B Quantification of PA intensity and sO₂ level from (A). C Change of sO₂ level after intratumoral injection of Mn/N-HCN and 1064 nm laser irradiation. D Schematic illustration of NIR-II/I PA monitoring