Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post recent median sternotomy and coronary artery bypass surgery , with a stable post-operative appearance of the cardiomediastinal contours allowing for differences in technique and projection . Pulmonary vascularity is normal . Interval improved aeration at the lung bases with minimal residual atelectasis remaining , right greater than left . Bilateral small pleural effusions are present , but there is no visible pneumothorax .
    OUTPUT:
    
Improving bibasilar atelectasis . Resolved interstitial edema . Small pleural effusions .