Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously identified opacity projecting over the mid thorax is no longer present , confirming that this was external to the patient . Otherwise , the tracheal stent is in unchanged position and there is no focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
1 . Opacity projecting over the mid thorax is no longer present , confirming that it was external to the patient . No focal consolidation . 2 . Tracheal stent in unchanged position .