Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Moderate to severe enlargement of the cardiac silhouette persists . Previously demonstrated diffuse alveolar opacities have substantially improved in the interval . Linear and increased interstitial opacities within the left perihilar region as well as the right lung base may reflect atelectasis or scarring . No focal consolidation , pleural effusion or pneumothorax is present . Pulmonary vasculature is not engorged . There are extensive degenerative changes of the left glenohumeral joint with milder changes noted in the right glenohumeral joint . Moderate multilevel degenerative changes are also seen within the imaged thoracic spine .
    OUTPUT:
    
Marked interval improvement in previously noted diffuse alveolar opacities . Linear and increased interstitial opacities in the right lung base and left perihilar region may reflect atelectasis or scarring . No new focal consolidation or pulmonary edema .