Fig. 10. (A) CT images of GNR@PPy@Fe₃O₄-FA nanocomposites with different Au concentrations and their CT values (HU) as a function of Au concentration. (B) T₂-weighted MRI photographs of GNR@PPy@Fe₃O₄-FA nanocomposites dispersed in water with different Fe concentrations and the transverse relaxation rate (1/T₂) as a function of Fe concentration (C) PA images and corresponding PA intensity of GNR@PPy@Fe₃O₄-FA nanocomposites of different concentrations. The PA signal values at different concentrations were obtained by using an 808 nm laser.