Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bibasilar opacities , left greater than right which have the appearance of atelectasis . Superiorly , the lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar opacities , likely atelectasis although infection can not be entirely excluded . Otherwise unremarkable chest x-ray .