Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The mediastinal and hilar contours are unchanged , without evidence of hilar lymphadenopathy . Again demonstrated are bi apical linear opacities suggestive of scarring with architectural distortion , unchanged . No focal consolidation , pleural effusion or pneumothorax is identified . Aeration of the lung bases appears improved compared to the prior chest radiograph . No acute osseous abnormalities are seen .
    OUTPUT:
    
No definite evidence for aspiration pneumonia . Unchanged scarring and architectural distortion within the lung apices .