FOLH1 and COVID-19: However, nodal uptake has been reported with FDG-PET (glucose), 68Ga-DOTATATE PET (somatostatin receptor), 68Ga-prostate-specific membrane antigen (PSMA, folic acid metabolism) (Orevi et al. 2022) and 11C-Choline (choline transporter-like protein–1) PET imaging (Schroeder et al. 2021) after COVID-19 vaccinations.