Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable view of the chest . When compared to prior , there has been no significant interval change . Again seen are bibasilar opacities , left worse than right . These do not appear to have progressed since prior . Superiorly , the lungs remain clear . Cardiomediastinal silhouette is unchanged in not well evaluated due to positioning and the heart being below the hemidiaphragm on the left . Vertebroplasty changes seen in the lower thoracic spine .
    OUTPUT:
    
Persistent bibasilar opacities , left worse than right which may represent bilateral pneumonia , aspiration , or may be chronic and due to scarring .