Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a nasogastric tube which terminates in the mid-esophagus on the initial radiograph , but is advanced on the subsequent radiograph to terminate in the stomach . The moderate right pleural effusion corresponding to the known empyema is unchanged . A right basilar pigtail catheter remains in place with a small amount of loculated air within the pleural space inferiorly . The left lung remains relatively clear . The heart and mediastinum are magnified by the projection .
    OUTPUT:
    
NG tube in satisfactory position . Otherwise no significant interval change .