FINDINGS:
Cardiac, mediastinal and hilar contours are normal.  Lungs are hyperinflated
 suggestive of COPD.  Ill-defined patchy opacity within the retrocardiac region
 is concerning for pneumonia in the correct clinical setting.  Previously noted
 right infrahilar patchy opacity appears improved.  No pleural effusion or
 pneumothorax is present.  There are no acute osseous abnormalities.

IMPRESSION:
1. Patchy ill-defined opacity in the left lower lobe is concerning for
 pneumonia in the correct clinical setting.
 2. Previously demonstrated right infrahilar opacity appears resolved.
 3. Lung hyperinflation suggestive of COPD.