Fig. 2From: Amphiphilic branched polymer-nitroxides conjugate as a nanoscale agent for potential magnetic resonance imaging of multiple objects in vivo a T1-weighted MRI images of copolymers with gradient PROXYL concentrations. b The relaxivity curve of Branched pDHPMA-mPEG-Ppa-PROXYL (Group 1) and 3-CP (Group 2) in the 3.0 T scannerBack to article page