Positive lesion shown as focal or diffuse FDG uptake above background in a location incompatible with normal anatomy or physiology without a specific SUV cutoff SUVmax > 14 informs the lymph nodes had transformed, whereas those with SUVmax < 14 do not
Contrast-enhanced CT
Maximum diameter is ≥10 mm, and minimum diameter is ≥6 mm Central area of neuroses Margins are blurred The target metastasis lymph nodes have special reinforcement