Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest radiograph demonstrates interval placement of a tracheal stent in the midline . When compared to chest film 1 day prior , there is no interval parenchymal changes . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette stable in appearance .
    OUTPUT:
    
Interval placement of tracheal stent . No new pneumothorax .