Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal silhouette is unchanged . Asymmetric pulmonary edema worse in the right mid lung has minimally worsened over the past few days . There is severe emphysema . Multiple large cystic spaces seen in the right upper lung with evidence of volume loss , parenchymal scarring , and pleural thickening , better evaluated on most recent chest CT from ___ , may be secondary to prior infection or of the residual of previous surgery . No pneumothorax is seen .
    OUTPUT:
    
1 . Mild pulmonary edema minimally worse over the past few days . 2 . Severe emphysema .