Positron emission tomography–computed tomography (better known as PET-CT) has revolutionized medical diagnosis since the first commercial systems reached the market in the early 2000s.(1) This advanced nuclear imaging technique combines a positron emission tomography (PET) scanner and an X-ray computed tomography (CT) scanner into a single machine. PET-CTs create threedimensional images, providing information about both the structure and function of cells and tissues in the body during a single imaging session.