Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are unchanged in appearance . The bilateral hila are normal . The previously described increased interstitial prominence reflective of chronic fibrotic changes involving the left lower lobe is again seen , unchanged . Similar changes are also seen to a lesser degree in the right lower lobe , also unchanged . There are no other focal lung consolidations . There is no evidence of pulmonary vascular congestion . There are no pneumothoraces or effusions .
    OUTPUT:
    
No focal lung consolidation concerning for pneumonia . Stable bibasilar scarring / fibrosis .