Fig. 3.

Contrast-enhanced CT image (a), iodine map (b), and fat map (c) of a 55-year-old man with esophageal cancer in the late phase. Regions of interest (b and c, circle) were placed at the center of the two right supraclavicular lymph nodes (a–c, arrows). Iodine concentration values were 0.25 mg/mL and 0.20 mg/mL, and fat fraction values were 17.0% and 17.6% for each lymph node, respectively. Iodine concentration and fat fraction were significantly lower in metastatic lymph nodes than in non-metastatic lymph nodes.