Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ETT ends 2 .6 cm above the carina . The NG tube extends below the diaphragm and out of view . Normal heart size , mediastinal and hilar contours . There has been interval development of retrocardiac opacity . No focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
1 . ET tube and NG tube in satisfactory position . 2 . Interval development of retrocardiac opacity which may reflect atelectasis or aspiration .