Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persisting bibasilar opacities , greater on the right which may reflect pneumonia and / or atelectasis . No pleural effusion or pneumothorax identified . The size of the cardiac silhouette is enlarged but unchanged . Calcification of the aortic arch is again noted .
    OUTPUT:
    
Persisting bibasilar opacities , greater on the right which may reflect pneumonia and / or atelectasis .