Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Compared to prior , there has been interval improvement of aeration at the lung bases . There are some persistent bibasilar opacities , right greater than left . Cardiomediastinal silhouette is stable as are the osseous and soft tissue structures .
    OUTPUT:
    
Mild interval improvement in the previously seen bibasilar opacities which persist . These could be due to resolving infiltrates or atelectasis or potentially aspiration .