Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . There is a left internal jugular venous catheter terminating in the superior vena cava , unchanged . The heart is again mild to moderately enlarged . There is a very small pleural effusion on the right . Opacification of the lower left hemithorax has increased substantially and includes a retrocardiac opacity with air bronchograms that is likely compatible with atelectasis ; a small to moderate pleural effusion probably coincides . There is also a small pleural effusion on the right . Fissures appear mildly thickened . There is no evidence for parenchymal edema . There is no pneumothorax .
    OUTPUT:
    
Bilateral pleural effusions , greater on the left than right , with increased left basilar opacity , not specific , although most frequently attributable to atelectasis . No evidence for parenchymal edema .