Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The first and third wires from the top are fractured . The cardiac silhouette size remains moderately enlarged . Mediastinal contour is unchanged . There is mild upper zone vascular redistribution without overt pulmonary edema . Patchy bibasilar opacities may reflect atelectasis . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild patchy opacities in the lung bases may reflect atelectasis but infection can not be completely excluded .