Figure 4

In vivo MR/CT imaging of a xenografted tumor model.

(a,b) T₂-weighted MR images, (c,d) MR signal intensity, (e,f) CT images and (g,h) CT value of tumors before and at 0.5 h post IT (a,c,e,g) and at 6 h post IV (b,d,f,h) injection of the Fe₃O₄ @ Au-PEI.Ac-PEG-FA NSs ([Fe] = 1.31 mM, [Au] = 70 mM, 0.1 mL in PBS).