ALB and neoplasm: In agreement with biodistribution data, the SPECT/CT images showed increased accumulation of [177Lu]Lu-Ibu-PSMA-02 in the PC-3 PIP tumor as compared to the uptake of [177Lu]Lu-Ibu-PSMA-01 and [177Lu]Lu-PSMA-617, but also higher uptake in the kidneys at 4 h p.i. Intense activity signals were also found in the urinary bladder for both albumin-binding radioligands.