Fig. 4

In vivo Multi-wavelength Fluorescence Imaging analysis and anti-tumor efficiency. a–c In vivo multi-wavelength fluorescence images tracking the spread of i.v. injected IR-820 and IR820@NCP in the mouse model. d Quantification of the maximum and minimum fluorescence intensities. e–i Example of the variability of caspase-3 staining within tumor samples in group A-E. j Quantitative analysis of all groups. Original magnification, ×400, Scale bar, 50 μm