Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes with unchanged bibasilar atelectasis . No pleural effusion or pneumothorax . Unchanged cardiomegaly . Patient is status post extubation . Right - sided central line terminates at the cavoatrial junction . Left chest tubes in unchanged position .
    OUTPUT:
    
No pneumothorax . Persistent low lung volumes with unchanged bibasilar atelectasis . Unchanged cardiomegaly .