Fig. 4From: A nitroxides-based macromolecular MRI contrast agent with an extraordinary longitudinal relaxivity for tumor imaging via clinical T1WI SE sequenceRepresentative MR T1-weighted images of the liver (a), kidney (b) and bladder (c) of one mouse after injection of Linear pDHPMA-mPEG-Ppa-PROXYL. d Quantitative analysis of the relative enhanced signal ratios in the liver, kidney, and bladder after injection of Linear pDHPMA-mPEG-Ppa-PROXYLBack to article page