FOLH1 and neoplasm: Comparison of low and high molar ligand amounts revealed that the PC-3 PIP tumor uptake of [177Lu]Lu-Ibu-DAB-PSMA was slightly increased after injection of a low ligand amount at 4 h p.i. (p > 0.05) but significantly higher (1.5–1.6-fold) at 24 h and 48 h p.i. (p < 0.05) (Fig. 3a).