Fig. 4
a MR imaging of magnetic gold nanoparticles after two serial dilutions. b Diagram of the statistical results of MR imaging signal strengths of two serially diluted magnetic gold nanoparticles. c MR imaging of all cells after labeling with the probes. Lane 1, HF; lane 2, MCF-7; lane 3, HepG2; lane 4, SGC-7901; lane 5, MKN45; lane 5, SW480; lane 6, U2OS. d Statistical results comparing the signal strengths from MR imaging using the T1WI sequence on cells labeled with HPA&GoldMag probes. e Statistical results for the signal strengths detected with MR imaging using the T2WI sequence on cells labeled with HPA&GoldMag probes