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(A) Schematic of chelator-free synthesis of radiolabeled QDs and application to PET and CRET imaging. (B) Photon flux of different samples obtained with different filters. (C) CRET images of U87MG tumor-bearing mice after 6 h of different treatments. (D,E) Total photon fluxes and red filter ratios in the tumor region. Reproduced with permission 38. Copyright 2015, American Chemical Society.
