Fig. 5From: External magnetic field promotes homing of magnetized stem cells following subcutaneous injectionParameters of MRI image analysis. a Reduction in the cluster area of labeled MSCs with time. b 24-h (1 d) and 48-h (2 d) displacement of SPIONs-MSCs increased significantly under magnetic field (*PÂ <Â 0.05, **PÂ <Â 0.001). c CNR was the highest at 24Â h, and an MRI shows obvious increase in the SPIONs-MSCs + magnetic field group. d SNR increased in the SPIONs-MSCs + magnetic field group by 24Â h, and was high in both groups by 7 dBack to article page