Strategies for Optimized Radiolabeling of Nanoparticles for in vivo PET Imaging By courtesy of: Guorong Sun, Jinqi Xu, Aviv Hagooly, Raffaella Rossin, Zicheng Li, Dennis A. Moore, Craig J. Hawker, Michael J. Welch,* and Karen L. Wooley* Â Adv. Mater. 2007, 19, 3157