Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are noted . There are bibasilar opacities . No large effusion is identified . The cardiomediastinal silhouette is within normal limits for technique . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities which could represent a combination of atelectasis , infection or potentially aspiration .