Fig. 3
From: A novel MRI contrast agent NaGdF4@PEG–CLS@MMP-13 NPs for detecting articular cartilage injury
T1 relaxivity measurements of NaGdF4@PEG–CLS@MMP 13 CBP NPs in vitro. (a) T1 weighted MR images of Gd-DTPA (top), NaGdF4@PEG–CLS NPs (middle), and NaGdF4@PEG–CLS@MMP 13 CBP NPs (bottom) with different Gd (III) concentrations; (b) Linear plots of the relaxation rate (1/T1) versus the Gd(III) concentration constructed for NaGdF4@PEG–CLS@MMP 13 CBP NPs, the r1 value was 8.07 mM−1 s−1; (c) Linear plots of the relaxation rate (1/T1) versus the Gd(III) concentration constructed for NaGdF4@PEG–CLS, the r1 value was 6.65 mM−1 s−1; (d) Linear plots of the relaxation rate (1/T1) versus the Gd(III) concentration constructed for Gd-DTPA, the r1 value was 3.01 mM−1 s−1.
