FAPI-2 is primarily used in medical imaging, particularly in positron emission tomography (PET) scans. It targets fibroblast activation protein (FAP), which is often overexpressed in cancer-associated fibroblasts. This makes it valuable for detecting and monitoring various types of cancers, including pancreatic, breast, and lung cancers. Its high specificity allows for precise imaging of tumor tissues, aiding in diagnosis and treatment planning. Additionally, FAPI-2 is being explored for potential therapeutic applications, such as targeted drug delivery and radiotherapy, due to its ability to bind to FAP-expressing cells.