Evazalipour et al. compared the properties of different nanobodies radiolabeled with 99 m-Technetium (99 mTc) in PSMA+ LNCaP and PSMA− PC3 cell lines and in PSMA− and PSMA+ tumor-bearing xenografts through SPECT/micro-CT imaging and tissue analysis. Here, FOLH1 is linked to neoplasm.