Fig. 3
From: Ultrasmall Fe3O4 and Gd2O3 hybrid nanoparticles for T1-weighted MR imaging of cancer
a T1-weighted MR images of FG-HNPs with 0.25–3 Gd/Fe molar ratios at varying Gd concentrations (TE = 12 ms, TR = 600 ms). b T1 and c T2 relaxation rates plotted as a function of CGd for FG-HNPs1-5. T1 relaxation rate: TE = 12 ms, TR = 100–5000 ms. T2 relaxation rate: TE = 12–168 ms, TR = 2000 ms. d r1 value or r2/r1 ratio plotted as a function of Gd/Fe molar ratio. e ΔSNR of the MR images for FG-HNPs1-5 at various Gd concentrations measured by ImageJ software compared to pure water (CGd = 0). The magnetic field was 3.0T