FIGURE 2. A 72-y-old man with colon carcinoma and known ischemic heart disease and who underwent coronary artery bypass grafting 13 y previously. CT (A), ¹⁸F-FDG PET (B), and fused PET/CT (C) images show focally increased ¹⁸F-FDG uptake in wall of thoracic aorta (arrows) with no corresponding CT calcification.