PDGFRB and Hepatic fibrosis: The efficacy of PDGFRß PET for detecting active liver fibrosis has recently been demonstrated preclinically using analogues of ATH001 labeled with various radionuclides including fluorine-18 (Wegrzyniak et al. 2023, 2024; Li et al. 2024), but neither of those constructs are ideal for clinical translation due to considerations on peptide precursor CMC, GMP radiochemistry or dosimetry.