[18F]PARPi in vivo pharmacokinetics. a
In vivo blood half-life of [18F]PARPi (n=3). Blood was collected at different time points (5, 15, 30, 45, 60, 90, 120 min), weighted, and counted. Results expressed as percent injected dose per gram (%ID/g). b Selected tumor-to-non-target-tissues ratio of [18F]PARPi (n=12) calculated from biodistribution data. c Biodistribution study in selected tissues. After injection of [18F]PARPi into mice with tumor xenografts, mice were euthanized at 2 h post-injection and radioactivity in organs was measured (n=6/group). Error bars are mean±SD. P values were calculated with Student’s t-tests, unpaired; *P<0.05; **P<0.01; ***P<0.001; ****P<0.0001.