Fig. 3. (a) In vivo PA images of HeLa xenograft mice and quantification of the PA signal several time points after i.v. injection with Fe–GA/CaO2@PCM NPs. (b) Ex vivo fluorescence images of major organs and tumors 24 h after injection and quantification of the fluorescence signal. (c) Concentration–time curve of Fe–GA/CaO2@PCM NPs in mice after i.v. injection. The concentration refers to the Fe ion content detected by ICP-MS.
