Fig. 4From: Development of fluorescence/MR dual-modal manganese-nitrogen-doped carbon nanosheets as an efficient contrast agent for targeted ovarian carcinoma imagingMR contrast ability of samples: A Linear relationship between longitudinal relaxation rate of Mn-N-CNSs and Gd-DTPA at different concentrations. B T1-weighted and corresponding pseudo-color images of Mn-N-CNSs at different Mn concentrations. C MR images of HO-8910 and NIH3T3 cells: (a) T1-weighted and corresponding pseudo-color images, and (b) MR signal intensity of cells before and after treated with Mn-N-CNSs@Anti-HE4 (Mn: 2Â mM) and Mn-N-CNSs (Mn: 2Â mM) for 2Â h. The inside of the red circles are cell pelletsBack to article page