Being a relatively weak PSMA binder, [89Zr]PEG-(DFB)3(ACUPA)1 may experience a comparatively low BSBeffect to that of [89Zr]PEG-(DFB)1(ACUPA)3 and thus demonstrate higher PSMA-targeted tumor accumulationwith tissue penetration. Here, FOLH1 is linked to neoplasm.