Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube terminates 5 cm from the carina . An enteric tube has its tip in the distal stomach . Lung volumes are low . There is a faint left retrocardiac opacity . There is no pleural effusion or pneumothorax . Heart size is normal . The mediastinal and hilar contours are normal .
    OUTPUT:
    
1 . ET tube 5 cm from the carina . 2 . Possible left retrocardiac opacity could reflect pneumonia , aspiration , or atelectasis .