Fig. 5
Representative T1 mapping imaging of tumor of one mouse by Branched pDHPMA-mPEG-Ppa-PROXYL a. The tumor was labeled with red arrow, and darker blue signals in the tumor suggest sharper enhancement in the MR images. The corresponding T1 values were spatially displayed in the tumor after injection of Branched pDHPMA-mPEG-Ppa-PROXYL b at different durations. c The 1/T1 values of two tumor groups were quantitatively analyzed (n = 5, *p < 0.05, compared with pre-injection)