FINDINGS:
Increased subpleural reticular markings throughout the lungs, most extensive
 on the left are again seen.  There is no superimposed consolidation or
 effusion.  The cardiomediastinal silhouette is within normal limits.  No acute
 osseous abnormalities.

IMPRESSION:
Chronic changes in the lungs compatible with patient's pulmonary fibrosis.  No
 definite superimposed acute process noting that one could easily be obscured.