Fig. 7From: Mitochondria-targeted nanoplatforms for enhanced photodynamic therapy against hypoxia tumora Concentration-dependent PA intensity of 3BP@PLGA-IR780. b In vivo PA images of 4T1 tumor tissue with prolonged injection time (0, 1, 2, 4, 6, 24, and 48Â h). c The PA intensity data of tumor tissues at different time pointsBack to article page