Fig. 2

PET/CT scans of DLBCL with a score of 5 in a 45 year-old man. (a), baseline PET/CT; (b), F-PET/CT. Baseline PET/CT shows an Ann Arbor stage IV tumor, which was interpreted as positive on F-PET/CT using the QVTA criteria; the residual foci (red arrow) were diagnosed and scored as 5. This patient received involved-field radiotherapy after 6 cycles of chemotherapy using rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) regimen, but the disease progressed, and the patient died 31 months after treatment initiation