Interestingly, [177Lu]Lu-PSMA-ALB-56 demonstrated a higher tumor uptake compared to [177Lu]Lu-PSMA-ALB-53 which led to a 3× higher tumor-to-kidney ratio of [177Lu]Lu-PSMA-ALB-56 compared to [177Lu]Lu-PSMA-ALB-53. Here, FOLH1 is linked to neoplasm.