Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . A left - sided AICD / pacemaker device is re - demonstrated with leads in unchanged positions . Mild enlargement of the cardiac silhouette is re - demonstrated . The mediastinal and hilar contours are unchanged . Patchy opacities in the lung bases are again noted , most likely reflective of atelectasis . No pleural effusion , pulmonary edema , or pneumothorax is identified . Minimally displaced fracture of the right eleventh rib laterally is better assessed on the previous . Coarse calcification within the right breast is unchanged .
    OUTPUT:
    
Bibasilar atelectasis . No pleural effusion or pneumothorax .