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 . Cardiomediastinal contours are within normal limits allowing for recent surgery . Improving atelectasis is demonstrated with mild residual patchy atelectasis at both lung bases . Small pleural effusions are also demonstrated .
    OUTPUT:
    
Improving bibasilar atelectasis . Small bilateral pleural effusions .