Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Doppler off tube is malpositioned , coiled just to the left of the if present . Lung volumes are low . Bibasilar atelectasis is mild . No pneumothorax . No mediastinal widening . Heart is probably mildly enlarged . Mediastinum , potentially in a tortuous esophagus or hiatal hernia
    OUTPUT:
    
NG tube probably coiled in the distal esophagus .