Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are noted with bibasilar opacities which are likely subsequent to atelectasis . Superiorly the lungs are clear . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities which are likely secondary to atelectasis in the setting of low lung volumes . Infection can not be entirely excluded . If desired , repeat with improved inspiratory effort could be attempted to further clarify .