Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The first image shows a Dobhoff tube is coiled in the proximal esophagus and then terminates in the distal esophagus . Subsequent images show positioning more distally with the tip seen in the distal stomach or duodenum on the final image . Lung volumes are unchanged . The cardiomediastinal contour is also unchanged with prominence of the hila consistent with pulmonary arterial enlargement . Aortic valve replacement and median sternotomy again noted . No consolidation or pneumothorax seen .
    OUTPUT:
    
The final image shows a Dobhoff tube positioned in the distal stomach or duodenum .