Fig. 6From: Amphiphilic branched polymer-nitroxides conjugate as a nanoscale agent for potential magnetic resonance imaging of multiple objects in vivo a Nitroxides concentration distribution in vivo for 24Â h after injection of Branched pDHPMA-mPEG-Ppa-PROXYL and 3-CP and b nitroxides concentration changes within 1Â hBack to article page