Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Moderate enlargement of the cardiac silhouette appears increased compared to the previous radiograph . There is increased perihilar haziness and vascular indistinctness compatible with mild pulmonary edema , new in the interval . More focal opacity in the left lung base could reflect atelectasis . No large pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
Mild congestive heart failure . More focal patchy left basilar opacity may reflect atelectasis , but infection can not be excluded completely .