Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Improved lung aeration since prior . Decreased heart size , pulmonary vascularity . Small left pleural effusion has decreased . Trace right pleural effusion has decreased . Improved left basilar consolidation . Minimal right basilar opacity , likely atelectasis . No pneumothorax . Ectatic thoracic aorta is stable .
    OUTPUT:
    
Improvement since prior . Left basilar opacity , likely atelectasis , consider pneumonia if clinically appropriate .