Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient remains intubated . The cardiac , mediastinal and hilar contours appear stable . There is a persistent extensive opacity in the left mid to upper lung that appears decreased . Specifically , this film is centered on the hemidiaphragms in order to assess for nasogastric tube placement . The nasogastric tube terminates in the distal esophagus where it makes a half coil . The stomach is mild to moderately distended . There is no free air .
    OUTPUT:
    
Nasogastric tube terminating in the esophagus . Persistent but decreased left lung opacity .