Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . There are bibasilar opacities , more conspicuous on the right than on the left . The cardiomediastinal silhouette is top normal in size . Mitral valve replacement is identified . Hypertrophic changes seen in the spine . Median sternotomy wires are identified .
    OUTPUT:
    
Bibasilar opacities , potentially atelectasis , although infection is also possible .