Fig. 5.

A case showing lung inflammatory changes in a 75-year-old woman after surgery of pancreatic cancer. CT (a) showed a 7.9-mm-sized lesion with a linear margin and a component of ground-glass opacity, which were concordant findings with an inflammatory process. ZTE (b) can clearly reveal these CT characteristics for the margin and the opacity, leading to correct diagnosis of active inflammatory lesions by combined findings of the high FDG uptake (SUVmax 6.9) on PET (c) and fused images (d). Dixon sequence (e, in phase; f, out of phase; g, fat; and h, water image, respectively), however, failed to depict those characteristics of the component of ground-glass opacity and simply showed a nodule-like lesion in comparison with ZTE, resulting in incorrect diagnosis of malignant nodule