Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual - lead pacemaker / ICD device appears unchanged . The patient is status post sternotomy and aortic valve replacement . The lungs are hyperinflated . The cardiac , mediastinal and hilar contours appear unchanged . Basilar reticulation suggesting mild interstitial lung disease appears unchanged . Otherwise , lungs appear clear . There are no pleural effusions or pneumothorax . Mild degenerative changes are similar along the lower thoracic spine , including small - to - moderate anterior osteophytes .
    OUTPUT:
    
Findings suggesting pulmonary fibrosis at the lung bases . No evidence of acute superimposed disease .