Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New nasogastric tube terminates in the stomach . A new retrocardiac airspace opacity may be due to atelectasis or aspiration . The right lung is clear . There is no pneumothorax . The heart and mediastinum are within normal limits despite the projection .
    OUTPUT:
    
New left lower lobe aspiration or atelectasis . Nasogastric tube terminates in stomach .