Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bibasilar opacities , left greater than right . Superiorly the lungs are clear . The cardiomediastinal silhouette is stable given differences in positioning and technique . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities are thought to reflect atelectasis . No consolidation worrisome for pneumonia .