Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bibasilar opacities . These could be in part due to atelectasis in the setting of low lung volumes . Superiorly the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities potentially due to atelectasis in the setting of low lung volumes noting that infection or aspiration are difficult to exclude .