Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Esophageal stent is noted in unchanged position . Platelike opacity at left lower lobe is likely atelectasis or parenchymal scarring . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is normal size .
    OUTPUT:
    
Esophageal stent is in unchanged position compared to ___ .