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Fig. 3A —46-year-old man with adenocarcinoma in right lower lobe and metastasis in right paratracheal lymph node, which was predicted by integrated PET/CT but not by helical dynamic CT. Transverse conventional (5.0-mm section thickness) enhanced CT scan (A) shows lymph nodes in right paratracheal area (arrow) with short-axis diameter of 7 mm, representing benignity with CT size criteria for malignant nodes. Integrated PET/CT image (B) shows high ¹⁸F-FDG uptake with maximum standardized uptake value of 8.0 in right paratracheal lymph node (arrow).