FINDINGS:
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.

IMPRESSION:
Bibasilar opacities, potentially atelectasis, although infection
 is also possible.