Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . The lungs are clear . Cardiomediastinal silhouette is normal . NG tube seen with tip in the mediastinum and should be advanced . Osseous and soft tissue structures are unremarkable . No free air below the diaphragm .
    OUTPUT:
    
NG tube tip seen in the mid to distal esophagus and should be advanced .