FOLH1 and neoplasm: The AUC values determined for the kidneys were lowest for 177Lu-Ibu-DAB-PSMA (p<0.05), resulting in a 1.5- to 1.7-fold increased tumor-to-kidney AUC ratio when compared to 177Lu-Ibu-N-PSMA, 177Lu-Ibu-Dα-PSMA and 177Lu-Ibu-PSMA, respectively.