Wikipedia
Fluciclovine
Fluciclovine, also known as anti-1-amino-3-18F-fluorocyclobutane-1-carboxylic acid (FACBC), or as Axumin ( brand name), and colloquially as anti-3[18F] FACBC or F18, is a diagnostic agent "indicated for positron emission tomography (PET) imaging in men with suspected prostate cancer recurrence based on elevated prostate specific antigen (PSA) levels."