FAP and neoplasm: The in vivo profile of the anti-FAP-α sdAb, [18F]FB-4AH29, was investigated in TC-1-hFAP-α tumour bearing mice by a similar protocol, including micro-PET/CT imaging at 1 h p.i. (Fig. 3b) and dissection analysis at 1.5 h p.i. (Fig. 4c), and compared to [18F]FB-R3B23.