Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and show an unchanged bibasilar and right upper lobe opacities . The cardiac silhouette is enlarged . The mediastinal silhouette shows aortic calcifications . The hilar contours and pleural surfaces are normal . No pneumothorax is present .
    OUTPUT:
    
Persistent bibasilar and right upper lobe opacities likely represent pneumonia .