Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a faint consolidation in the left lower lobe which is less dense than on ___ . The left lower lobe was well - aerated on ___ . There is also increased density in the anterior basal right lower lobe compared to ___ , similar to ___ . A linear opacity in the lingula is new compared to ___ and may represent atelectasis or scarring . There is no evidence for pulmonary edema or pleural effusion . Mediastinal contours are unremarkable . Heart size is within normal limits . There are degenerative changes in the spine .
    OUTPUT:
    
Faint consolidation in the left lower lobe , decreased compared to ___ . Persistent consolidation in the anterior basal right lower lobe compared to ___ . This may represent recurrent pneumonia , but in the absence of interim radiographs to demonstrate clearance of prior pneumonia , other etiologies are not excluded .