Fig. 5From: Inner structure- and surface-controlled hollow MnO nanocubes for high sensitive MR imaging contrast effecta T1-weighted MR images and b T2-weighted MR images depending on the concentration of each particle and plots of each relaxation (1/T1 and 1/T2) against Mn concentration. c Calculation of R1 relaxivity (r1), R2 relaxivity (r2) and r2/r1 [MnOEn (blue line), MnOEnHo (red line), MnOEx (green line), and MnOExHo (yellow line)]Back to article page