Figure 4From: Carbon-coated iron oxide nanoparticles as contrast agents in magnetic resonance imagingMR images for T 1 (a) and T 2 (b) measurements, respectively. The circular images in the picture are MR images of aqueous samples of varying concentrations with the units of mM. While a dose-dependent increase in signal intensity is seen in the T1 measurements, a dose-dependent decrease in signal intensity is observed in the T2 measurements.Back to article page