Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal and enteric tubes , as well as a catheter projecting over the lower thoracic spine remain in unchanged positions . Left - sided dual - chamber pacemaker device is re - demonstrated with leads in similar positions . The patient is status post median sternotomy , CABG , with coronary artery stenting noted . Cardiac and mediastinal contours are unchanged . Lung volumes are low , but slightly improved compared to the most recent previous study , with crowding of bronchovascular structures but no overt pulmonary edema . Patchy opacities in the lung bases are re- demonstrated , likely areas atelectasis as these findings were not present on the initial radiographs . No pneumothorax is present .
    OUTPUT:
    
Bibasilar atelectasis . No pulmonary edema .