FAP and neoplasm: The differences in FAP+ tumor uptake comparing 68Ga-OncoFAP with 68Ga-FAPI-46 were also reflected by significantly different Patlak slopes, k3/k4, and Vs confined to FAP+ tumors in between the tracers (geometric mean ± std, Patlak slope 68Ga-OncoFAP: 0.007 ± 0.005 (n = 6), 68Ga-FAPI-46: 0.002 ± 0.001 (n = 4), p = .02; k3/k4 68Ga-OncoFAP: 7.91 ± 4.83, 68Ga-FAPI-46: 1.77 ± 2.74, p = .04; Vs 68Ga-OncoFAP: 1.34 ± 0.78, 68Ga-FAPI-46: 0.25 ± 0.29, p = .02; Suppl.