FIGURE 6.

¹⁸F-FDG PET/CT of vascular inflammation. (A) Vascular graft infection. CT, PET, and PET/CT fusion images in representative transaxial and coronal views, along with whole-body maximum-intensity projection (MIP), 12 mo after endovascular aortic repair for aneurysm of descending thoracic aorta. CT is consistent with endoleak of prosthesis, leading to expanding aneurysm, and PET shows intense uptake in periphery of aneurysm, consistent with infection, requiring surgical revision. (B) Large-vessel vasculitis. Shown are representative images in patient with weight loss, elevated level of serum C-reactive protein, and fever of unknown origin. Intense, diffuse elevated uptake in walls of aorta, large arteries of neck, and upper and lower extremities (significantly above liver uptake) is consistent with active giant-cell arteritis.