The PSMA-binding affinity of [177Lu]Lu-Ibu-PSMA-02, determined using PC-3 PIP tumor cells, was in the same range (KD = 40 ± 15 nM) as the affinity of [177Lu]Lu-Ibu-PSMA-01 (KD = 24 ± 7 nM; p > 0.05) [17]. Here, FOLH1 is linked to neoplasm.