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Xray and Radioisotopic images of mice treated with the (A) 177Lu-PLGA(RGF) system and (B) 177Lu-PLGA(RGF)-CXCR4L system 24 h post-administration of 2.4 MBq. The liver and kidney uptake was subtracted from the image to visualize the tumor uptake. Photons/s/mm2 (p/s/mm2).
