Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs . The lungs are hyperinflated . There is no focal consolidation , effusion , or pneumothorax . Cardiomegaly is mild . There are minimal aortic arch calcifications .
    OUTPUT:
    
Emphysema . No pneumonia or CHF . Borderline cardiomegaly . Possible small airway obstruction .