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PET images of some clinically studied RGD-based tracers 1 h after intravenous administration in healthy volunteers (B–D,F), a patient with melanoma (A), scrofula (E), lung cancer (G), and hepatocellular carcinoma (H). All images are coronal views. High tracer retention is notable in urogenital tract, due to predominant renal clearance. Intermediate uptake is found in the liver, spleen, and intestines. Reproduced with the permission from [5,45,47,190,207,208,209,210].
