FDG is the abbreviation for Fluorodeoxyglucose, a radiopharmaceutical tracer used for medical imaging purposes. Synonyms for FDG include 18F-FDG, Fluoro-2-deoxy-D-glucose, Fluorine-18 fluorodeoxyglucose, and 2-Fluoro-2-deoxy-D-glucose. FDG is commonly used in PET-CT scans to diagnose and monitor medical conditions such as cancer, heart disease, and brain function. The tracer works by highlighting areas of increased metabolic activity in the body, which can indicate the presence of disease or injury. Knowing the various synonyms for FDG is important for medical professionals who need to communicate effectively with colleagues and patients about complex medical procedures and treatments.