18-F-fluorodeoxyglucose positron emission tomography/computed tomography (18-FDG-PET/CT) is a functional imaging technique which is an established tool in oncology, and has also demonstrated a role in the field of inflammatory diseases, such as large vessel vasculitis (LVV). In the last few years, it is known that atherosclerotic lesions with inflammation, detected by FDG-PET, are high-risk structural features and more likely to lead to subsequent progression of atherosclerosis with more clinical complications.