Figure 4.
T2 values (contrast) in MRI of phantoms containing different concentrations of unlabeled and labeled UC-MSCs. USPIO shows a dose-dependent effect. *P < 0.05, compared with control group; #P < 0.05, compared with concentration = 0.25 × 106 cells/mL in the USPIO series. UCMSCs umbilical cord-derived mesenchymal stem cells, SPIO superparamagnetic iron oxide, USPIO ultrasmall superparamagnetic iron oxide, MRI magnetic resonance imaging.