Since the imaging has beenperformed for up to 9 days, it is difficult to control the tumor sizeover time, and we observed that the PC3-Pip tumors of the mice group(383 ± 0.051 mg) treated with [89Zr]PEG-(DFB)1(ACUPA)3 were larger than that of the mice group(242 ± 0.054 mg) treated with [89Zr]PEG-(DFB)3(ACUPA)1. Here, PIP is linked to neoplasm.