Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate moderately enlarged heart . There is no overt pulmonary edema . Lungs are hyperinflated with flattening of the diaphragms bilaterally , consistent with emphysema . No focal opacity convincing for pneumonia is identified . No pleural effusion or pneumothorax is present . Calcifications through the aortic arch are noted . Osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
Emphysema . Cardiomegaly , stable . No evidence of edema or infection .