Fig. 2

The system was maintained consistency in ⁶⁸Ga³⁺ concentration, pH level, and solvent throughout the experimental groups. a Radiochemical yields of all compounds at room temperature at 3, 5, and 15 min. 10 nmol of the precursor was added to 1 ml of ⁶⁸GaCl₃ (approximately 150 MBq) and the pH was adjusted to 4.0–4.5 using the same volume of sodium acetate buffer solution. b Radiochemical yields of different amounts of precursors under suitable labeling conditions. Varying quantities of precursor were added to the same volume of ⁶⁸GaCl₃ (150 MBq) and sodium acetate solution. DATA^5m- and AAZTA⁵-were reacted for 10 min at room temperature and DOTA-for the same time at 95 °C