Optimal 18F-fluorination conditions for the high radiochemical yield of [18F]AlF-NOTA-NHS complexes

18F-fluorination using aluminum-fluoride ([18F]AlF) chelate technique has been reported to give a low-to-moderate radiochemical yield, between 5 and 20%. Therefore, the work described here outlines the optimum 18F-fluorination condition for the formation of [18F]AlF2+ and [18F]AlF-NOTA-NHS complex with the radiochemical yield (RCY) and purity (RCP) of more than 90% as a prerequisite step before proceeding with the radiopharmaceutical preparation using the [18F]AlF-bifunctional chelator technique. As well as being simple, the suggested method is practical and relevant for beginners interested in 18F-fluorination with [18F]AlF-chelate complex technique or also for a researcher who aims to proceed on an extensive scale.

TOXICITY EVALUATION OF SAFETY OF LIOPHILIZATES USED FOR FORMULATION OF THE RADIOPHARMACEUTICAL PREPARATION 68Ga-CITRATE IN EXPERIMENT IN RODENTS

Toxicity effects of «Cigalin» and «Ferocit» lyophilizates used for formulation of the radiopharmaceutical preparation 68Ga-citrate were studied in animal organisms (rats, mice). Good tolerability, absence of pronounced intoxication symptoms, allergenic effects and animal deaths were noted in experiments using a recommended clinic dose of lyophilizates. «Cigalin» didn’t produce toxicity effects influencing on statistically significant changes in blood main hematological and biochemical parameters. Similar changes in case of «Ferocit» used in multiple doses were functionally reversible. The results permit to characterize 68Ga-citrate as safe for clinical applications in radionuclide diagnostics for PET imaging of inflammation and infection.