Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube tip terminates approximately 2 .7 cm from the carina . Orogastric tube tip can only be traced to the level of the distal esophagus , and likely should be advanced . The patient is status post median sternotomy . Low lung volumes are present which accentuates the size of the heart which is likely mildly enlarged . Aortic knob is distinct . Crowding of the bronchovascular structures is noted , but no overt pulmonary edema is seen . Bibasilar patchy airspace opacities may reflect atelectasis though aspiration or infection is not excluded . No pleural effusion or pneumothorax is identified .
    OUTPUT:
    
1 . Low lung volumes . Bibasilar airspace opacities could reflect atelectasis but aspiration or infection is not excluded . 2 . Endotracheal tube is slightly low lying , terminating approximately 2 .7 cm from the carina . Orogastric tube tip can only be traced to the distal esophagus , and should be advanced for optimal positioning .