Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Interval placement of an NG tube noted with the tip in the left upper quadrant . In this patient with a known paraesophageal hiatal hernia , there is a persistent gas - filled loop of the distal stomach projecting over the right lung base . Bibasilar atelectasis is again noted . No definite signs of free air below the right hemidiaphragm .
    OUTPUT:
    
Interval placement of an NG tube . Paraesophageal hernia persists .