Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Despite moderately severe emphysema , lung volumes are lower compared to ___ , and crowding of mild pulmonary edema may explain greater opacification in the right lower lobe on the frontal view . Opacification in the left lower lobe could be residual atelectasis , following resolution of prior left pleural effusion , but needs to be followed for possible new pneumonia . Pulmonary arteries are still large , but cardiomediastinal silhouette is normal . Degenerative changes of the AC joints are present .
    OUTPUT:
    
1 . Mild pulmonary edema . COPD 2 . Suggest followup conventional radiographs to monitor possible early pneumonia in both lower lobes . 3 . Interval improvement of left pleural effusion . 4 . Dr ___ ___ I discussed these findings by telephone at the time of approval .