Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The lungs are hyperinflated with markedly widened AP diameter of the chest which is compatible with emphysema . An area of presumed scarring at the right lung base appears stable from most recent prior exam . There is no new consolidation , effusion , or pneumothorax seen . Cardiomediastinal silhouette appears stable . Bony structures intact .
    OUTPUT:
    
COPD , scarring at the right lung base . No definite signs of pneumonia or CHF .