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 stable in the postoperative period . Since the recent study , support and monitoring devices have been removed , with no evidence of pneumothorax . Bibasilar atelectasis is present , left greater than right , with some interval improvement in the left retrocardiac region since the prior study . Bilateral small pleural effusions are also noted . There is apparent loculated component of the left effusion at the apex .
    OUTPUT:
    
Small pleural effusions and bibasilar atelectasis , left greater than right .