FAP and neoplasm: Head-to-head comparison with 68Ga-FAPI-46 revealed significantly higher uptake and tissue-to-blood ratios in FAP+ tumors for 68Ga-OncoFAP 1 h p.i. and comparable uptake between the two tracers 3 h p.i. (uptake in % injected dose per g [% ID/g] 1 h 68Ga-OncoFAP: 2.49 ± 0.56 (n = 6), 68Ga-FAPI-46: 1.28 ± 0.40 (n = 4), p = .01; tumor-to-blood ratio 68Ga-OncoFAP: 8.61 ± 5.1, 68Ga-FAPI-46: 1.98 ± 0.92; uptake [% ID/g] 3 h 68Ga-OncoFAP: 2.60 ± 1.96 (n = 6), 68Ga-FAPI-46: 2.64 ± 0.60 (n = 6), p = .59; tumor-to-blood ratio 68Ga-OncoFAP: 38.06 ± 33.08, 68Ga-FAPI-46: 28.62 ± 17.69; Suppl.