Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy , tricuspid valve replacement , and CABG . Moderate enlargement of cardiac silhouette is unchanged . There is mild pulmonary edema , similar to that seen on the prior examination . Linear and patchy opacification in the right lung base is compatible with atelectasis and / or scarring , with a small right pleural effusion and right lateral pleural thickening appearing unchanged . There is no pneumothorax . No acute osseous abnormalities detected .
    OUTPUT:
    
Mild pulmonary edema and small right pleural effusion , similar to that seen on the prior study . Linear opacities in the right lung base likely reflect atelectasis and / or scarring .