FINDINGS:
Heart size is normal. Cardiomediastinal silhouette and hilar contours are
 normal.  Subtly increased posterior basal opacity without definite frontal
 correlate as compared to prior examination is suspicious for infection. Lungs
 are otherwise clear. Pleural surfaces are clear without effusion or
 pneumothorax.

IMPRESSION:
Subtly increased posterior basal opacity without definite frontal correlate as
 compared to prior examination is suspicious for infection.