Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior radiograph on ___ , there are new bibasilar opacities , which may represent infection or aspiration in the appropriate clinical setting . No pleural effusions or pneumothorax . Cardiomediastinal silhouette is normal . No subdiaphragmatic free air .
    OUTPUT:
    
Bibasilar opacities may represent aspiration or infection in the appropriate clinical setting .