Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded but clear . The heart is normal in size . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . No acute cardiac or pulmonary findings . 2 . Hyperexpanded lungs , a finding that can be seen in the setting of COPD and asthma . Clinical correlation is advised .