FOLH1 and neoplasm: In addition, tumor uptake for [18F]AlF-PSMA-FAPI-01 and [18F]AlF-PSMA-FAPI-02 was higher than that for the corresponding monomers [18F]FAPI-42 and [18F]AlF-PSMA-BCH in FAP-positive A549-FAP and PSMA-positive 22Rv1 tumor xenografts.