Fig. 3.
(A) Pretreatment fused positron emission tomography-computed tomography image shows a large hypermetabolic esophageal cancer (SUVmax=26.6). (B) post-treatment image shows linearly increase uptake in the upper thoracic esophagus beyond the boundary of the primary tumor (SUVmax=7.1), which suggests active radiation esophagitis. Due to esophagitis, diagnosis of complete remission by visual interpretation is difficult, while reduction of SUVmax (ΔSUVmax) was 73.3%, which implies complete remission according to the cut-off ΔSUVmax of 72%. Permanent pathologic examination revealed no remaining viable tumor. SUVmax, maximum standardized uptake value.