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Figure 4b.   Adenocarcinoma of the lung in a 50-year-old woman. The patient was treated with a radiation dose of 50 Gy after undergoing right upper and middle lobectomy. (a) CT scan obtained 3 months after completion of therapy shows discrete consolidation in the right lower lobe conforming to the radiation portal. (b) CT scan obtained at the same level 5 months later demonstrates solid consolidation with a sharp, straight lateral edge (arrows).