Figure 5.
Effect of magnetic field strength on the relaxivity of IONP. (a) r1 values of naked magnetite nanoparticles (MF), oleic acid coated nanoparticles (NaOA-MF), polyacrylic acid coated nanoparticles (PAA-MF), citric acid coated nanoparticles (CA-MF), and Resovist, a commercialy available iron oxide nanoparticle formulation. Relaxivity values were measured at different field strengths between 0.47 T and 9.4 T. (b) The r2 values of the nanoparticle formulations measured at various field strengths. Reproduced with permission.106 Copyright 2012, Elsevier.