FAPI-4 is a fibroblast activation protein (FAP) inhibitor used in cancer research[1]. Fibroblast activation protein[1]
[1]. Giesel FL, et al. 68Ga-FAPI PET/CT: Biodistribution and Preliminary Dosimetry Estimate of 2 DOTA-Containing FAP-Targeting Agents in Patients with Various Cancers. J Nucl Med. 2019 Mar;60(3):386-392.
















