Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar atelectasis , greater on the right than the left . Otherwise , the lungs are clear with no evidence of consolidation , effusion , or pneumothorax . Cardiomediastinal silhouette is normal . Osseous structures are normal .
    OUTPUT:
    
Bibasilar atelectasis , greater on the right than the left . Pneumonia must be excluded in the proper clinical setting .