Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the NG tube is at the pylorus versus the first portion of the duodenum . The lungs are clear . The cardiomediastinal silhouette is within normal limits . Patient is status post median sternotomy and coronary artery stent placement with surgical clips projecting over the mediastinum . No large effusion or pneumothorax is seen .
    OUTPUT:
    
NG tube tip at the pylorus versus first portion of the duodenum .