Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with flattening of the diaphragms consistent with patient 's history of COPD with underlying pulmonary emphysema . There is mild pulmonary vascular congestion which is improved from comparison study . There are opacities at the lung bases which could represent infection , bronchiectasis , or pulmonary edema . There is persistent eventration of the right hemidiaphragm .
    OUTPUT:
    
1 . Mild pulmonary edema , which is improved from chest xray ___ . 2 . Opacities at bilateral lung bases may represent infection , pulmonary edema , bronchiectasis in proper clinical setting . 3 . Severe COPD .