The AUC of the tumor uptake and absorbed dose was higher for [<sup>177</sup>Lu]Lu-FAPI-46-F1D and the two albumin binder conjugates, [<sup>177</sup>Lu]Lu-FAPI-46-Ibu and [<sup>177</sup>Lu]Lu-FAPI-46-EB, in HT1080.hFAP xenografts and for [<sup>177</sup>Lu]Lu-FAPI-46-EB and [<sup>177</sup>Lu]Lu-FAP-2286 in HEK293.hFAP xenografts. Here, ALB is linked to neoplasm.