Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , there is interval resolution of small right apical pneumothorax and right pleural effusion . Lungs are hyperinflated but clear . Cardiomediastinal silhouette is normal .
    OUTPUT:
    
1 . Interval resolution of small right apical pneumothorax and right pleural effusion . 2 . Hyperinflated lungs , usually due to emphysema , but etiology is unclear in this case .