Figure 4From: A systematic study of core size and coating thickness on manganese-doped nanocrystals for high T2 relaxivity as magnetic resonance contrast agent Dependency of relaxivity coefficient (r2, mM −1 S −1 ) values on the core size and the PEG chain length of (a) MnMNC6, (b) MnMNC12. Comparison of r2 values of conventional iron oxide nanoparticles (dotted black line: Feridex, dotted gray line: CLIO).Back to article page