Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bibasilar opacities that have improved compared to the prior radiograph on ___ . While these may represent atelectasis , infection can not be excluded in the appropriate clinical setting . No pulmonary edema , large pleural effusions or pneumothorax . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities identified .
    OUTPUT:
    
Bibasilar opacities may represent atelectasis or infection in the appropriate clinical setting .