Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe bilateral , right greater than left , emphysema with large bulla causing lucency of the right hemithorax . No definite pneumothorax is identified . Linear opacities in left lung base are most consistent with atelectasis and / or scarring . No focal consolidation or pleural effusion . Heart size and cardiomediastinal contours are normal .
    OUTPUT:
    
1 . Left lung base linear opacities are most consistent with atelectasis and / or scarring , but there is continued concern for infection , dedicated PA and lateral radiographs are recommended . 2 . Severe bilateral , right greater than left , bullous emphysema .