Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP view of the chest . Left chest tube in place . There are low lung volumes and elevation of the left hemidiaphragm more than the right , and bibasilar atelectasis . The cardiomediastinal and hilar contours are widened , but exaggerated likely due to low lung volumes . No pneumothorax . No pleural effusion .
    OUTPUT:
    
Low lung volumes and bibasilar atelectasis . No pneumothorax .