FAP and neoplasm: However, a difference in pharmacokinetics was observed; a more rapid uptake of [177Lu]Lu-eFAP-6 in the FAP-positive tumor compared to [177Lu]Lu-FAPI-46 was measured (6.4 ± 1.1% ID/g and 5.0 ± 1.7% ID/g 1 h post injection (p.i.), respectively) (Fig. 6A, Table S1).