Figure 5From: Carbon-coated iron oxide nanoparticles as contrast agents in magnetic resonance imagingMR signal intensity for T 1 relaxation. MR signal intensity as a function of the time of inversion is shown for two representative concentrations of nanoparticles. The T1 relaxation in the 0.427-mM sample was faster than that of the 4.27-mM sample.Back to article page