Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright view of the chest demonstrates normal lung volumes . Bibasilar opacities are noted . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no overt pulmonary edema . No pneumothorax . Remote right - sided rib fractures are noted .
    OUTPUT:
    
Bibasilar opacities , may represent atelectasis , aspiration or infection in the appropriate clinical setting .