Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ET tube has been advanced , and now terminates just distal to the clavicular heads . There has also been interval placement of a nasogastric tube which terminates in the stomach . A new retrocardiac left lower lobe opacities may be due to atelectasis or aspiration . Cardiomegaly is stable .
    OUTPUT:
    
New left lower lobe retrocardiac airspace opacity which may be due to aspiration or atelectasis . Stable cardiomegaly . Lines and tubes in satisfactory position .