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Maximum intensity projection CT images of hind leg primary sarcomas at 30 minutes, 24 hours, and 72 hours after gold nanoparticle injection (12-nm nanospheres, 30-nm and 60-nm GNS). Gold concentrations are shown in green (windowed from 2 to 10 mg/ml), while other tissues are shown in gray scale (windowed from -100 to 5000 HU). Gold is primarily visualized in the blood vessels immediately after injection and in the tissues in the delayed scans.
