Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is extensive patchy consolidation versus atelectasis in the left base with retrocardiac opacity and silhouetting of the left hemidiaphragm . There is a small left effusion . Free air underneath the diaphragm is identified in this patient who is status post recent surgery . There is atelectasis in the right lung base persists and cystic fluid in a fissure . The lung parenchyma otherwise appears
    OUTPUT:
    
No specific evidence of pulmonary edema as clinically questioned . Extensive bibasal opacities worse in the left side may represent atelectasis though infection be difficult to exclude . Free air postop