Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower on the current exam with secondary bibasilar opacities which are likely atelectasis . Superiorly , lungs are clear . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Lower lung volumes with bibasilar opacities which are likely atelectasis . Infection can not be entirely excluded .