TABLE 2.

Tumor Uptake Rates of ¹⁷⁷Lu-Labeled FAPI Derivatives and Calculated AUCs

Derivative	1 h	4 h	6 h	24 h	AUC 1−24 h
FAPI-04	8.40 ± 0.36	9.44 ± 1.33	7.00 ± 1.20	2.86 ± 0.31	7,915
FAPI-21	9.35 ± 1.62	12.38 ± 2.42	12.77 ± 2.88	6.03 ± 0.68	13,613
FAPI-35	6.68 ± 1.06	5.35 ± 1.13	5.29 ± 0.51	2.47 ± 0.23	5,902
FAPI-46	12.35 ± 6.25	10.60 ± 0.49	8.64 ± 0.52	2.29 ± 0.16	9,126
FAPI-55	9.30 ± 2.43	7.53 ± 2.13	7.37 ± 1.32	1.55 ± 0.16	7,289

Data are mean %ID/g ± SD (n = 3).