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Fig. 3D —56-year-old man with non–small cell lung cancer manifesting as
left upper lobe mass. Attenuation correction performed using unenhanced CT
(A–C) and IV contrast-enhanced CT (D–F). Coronal
images show no perceived visual increase in 18F-FDG activity in
mass (arrows) compared with A–C. Mean (maximum) SUV
values of mass were 17.3 (24.6), an increase of 14.9% compared with
A–C. Note 18F-FDG activity in contrast-enhanced right
subclavian vein and heart is similar to A–C when unenhanced CT is
used for attenuation correction. D, IV contrast-enhanced chest CT.
