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Fig. 3B —Images of adenocarcinoma in left upper lobe in 53-year-old man in whom diagnosis was false-negative. Transverse diffusion-weighted (DW) image (3,602/50) obtained with b factor of 1,000 s/mm² shows nodule (arrow) with very low signal intensity similar to that of surrounding more-normal lung; it scored 1 on 5-point rank scale. More-normal lung scored 1 on 5-point rank scale on DW images obtained with b factor of 1,000 s/mm².