Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest , PA and lateral . The lungs are hyperinflated but clear . The hilar and cardiomediastinal contours are normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . The left pectoral pacemaker has leads which are unchanged in position , and intact . The patient is status post aortic valve replacement .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Hyperinflated lungs with flattening of the diaphragm , suggestive of emphysema .