[61Cu]-9,10-Phenanthrenequinone thiosemicarbazone ( 61Cu-PQTS), a radiolabeled anticancer compound was prepared for malignant tissue imaging studies. Copper-61 was produced via the natZn(p, x) 61Cu nuclear reaction in a 30 MeV cyclotron (150 μA irradiation for 76 min, radionuclidic purity >95%). 61Cu-PQTS was prepared from in-house synthesized PQTS. Quality control was performed using ITLC. The biodistribution of the tracer was compared to the biodistribution of cationic copper-61 in healthy controls. 61Cu-PQTS was then administered to fibrosarcoma-bearing mice for biodistribution and co-incidence imaging studies. 61Cu-PQTS demonstrated significant tumor uptake of 2.1% ID/g and the tumor was clearly visualized in a fibrosarcoma model.
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