Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate hyperinflated lungs . The relative increased opacity of the lung bases may represent aspiration , atelectasis , or infection . No overt pulmonary edema . The cardiomediastinal and hilar contours are unchanged . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Relative increased opacity of the lung bases may represent aspiration , atelectasis , or infection . 2 . No overt pulmonary edema .