Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extremely low lung volumes are again noted . Bibasilar opacities are therefore likely secondary to atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is unchanged . No acute osseous abnormalities . No free air seen below the diaphragm .
    OUTPUT:
    
Limited exam with low lung volumes . Bibasilar opacities are likely atelectasis noting that infection can not be excluded .