Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again , there are bilateral chest tubes in unchanged position . Small bilateral layering pleural effusions are stable . The left upper lung zone opacity is stable . There is no new opacity or pulmonary edema . There is no pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No significant change from the prior radiograph .