Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes and bibasilar opacities which are likely atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities pain
    OUTPUT:
    
Low lung volumes with bibasilar opacities which are most likely atelectasis although infection is not entirely excluded .