Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes are seen on the current exam . Bibasilar opacities are likely secondary to atelectasis . Superiorly , lungs are clear . Cardiac silhouette is within normal limits noting noted is accentuated by low lung volumes . Tortuosity of the thoracic aorta is again noted . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities likely secondary to atelectasis in the setting of low lung volumes .