Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperinflated and clear . No pleural effusion , pneumothorax , or pneumomediastinum . Heart size , mediastinal contour , and hila are unremarkable . The upper abdomen is within normal limits .
    OUTPUT:
    
1 . Mildly hyperinflated lungs can be seen with emphysema or small airways disease . 2 . No pneumothorax .