Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . The lungs are hyperinflated with flattening of both hemidiaphragms . The previous bibasilar opacities have essentially cleared . The upper lung zones are hyperlucent with attenuation of pulmonary vessels and destruction of parenchyma , consistent with severe emphysema . No new focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . Bilateral hilar enlargement is suggestive of underlying pulmonary hypertension . The heart size is normal .
    OUTPUT:
    
1 . Interval clearing of bibasilar pneumonia . No additional new consolidation . 2 . Lung findings consistent with severe emphysema , particularly right upper lung zone . 3 . Bilateral hilar enlargement , likely secondary to underlying pulmonary hypertension .