FOLH1 and neoplasm: In comparison to the previously developed 177Lu-PSMA-ALB-56 29, the ibuprofen-derivatized radioligands showed slightly reduced tumor-to-kidney AUC ratios (p>0.05), however, the absolute AUC value for the kidneys was lower for 177Lu-Ibu-DAB-PSMA as compared to all other albumin-binding radioligands including 177Lu-PSMA-ALB-56.