Table 1.

Stability of the⁶⁴Cu–NOTA–FA–FI–PEG–PEI–Ac–Mn₃O₄ NPs in Mouse Serum at 37 °C for 1, 2, 5, and 24 h

time (h)	1	2	5	24
radiochemical purity (%)	99.23 ± 0.48	99.02 ± 0.59	95.03 ± 1.29	91.54 ± 1.11