Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: This exam is currently being interpreted on ___ . The patient is status post median sternotomy and CABG . There is mild enlargement of cardiac silhouette which is unchanged . The aorta is tortuous and demonstrates atherosclerotic calcifications . Mild pulmonary edema is demonstrated . No pleural effusion or pneumothorax is identified . Patchy opacities in the lung bases likely reflect areas of atelectasis , though infection in the right lung base is not completely excluded . There are mild degenerative changes in both shoulders .
    OUTPUT:
    
Mild pulmonary edema . More focal opacity in the right lung base may reflect atelectasis though infection is not excluded .