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Specific tumor uptake of peptide radiopharmaceuticals depends on tumor binding affinity and their radiochemical purity. Several important parameters that influence the 99mTc‐labeling and consequently the radiochemical purity of 6‐hydrazinonicotinamide (HYNIC)‐conjugated peptide are radionuclide activity, the amount of peptide, the amount of coligands, and the amount of reducing agents (stannous ion)...
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