Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Although faint bibasilar opacities persist , there has been significant interval improvement in their appearance . There is no large confluent consolidation or effusion or pneumothorax . The cardiomediastinal silhouette is stable . No acute osseous abnormalities identified .
    OUTPUT:
    
Interval improvement of the previously noted bibasilar opacities which may now be due to atelectasis . No new confluent consolidation or effusion .