Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate hyperexpanded lungs bilaterally with flattening of the diaphragms and lucency within the upper lobes consistent with severe emphysema . No focal opacity convincing for pneumonia is identified . Blunting of bilateral costophrenic angles may reflect a component of scarring . No large pleural effusion is seen . Cardiomediastinal and hilar contours are stable in appearance when compared to prior radiograph dated ___ . Heart is stably enlarged . No overt pulmonary edema and is seen . Osseous structures demonstrate no acute abnormality .
    OUTPUT:
    
Severe emphysema with no focal opacity convincing for pneumonia .