FOLH1 and neoplasm: The representative maximum intensity projection (MIP) images at different times and time–activity curves of [18F]AlF-PSMA-FAPI-01 and [18F]AlF-PSMA-FAPI-02 over the course of 2 h p.i. revealed fast biodistribution and specific uptake in nude mice bearing A549-FAP tumor xenografts in vivo (Figure 6).