FINDINGS:
Cardiac silhouette size is moderately enlarged.  The mediastinal and hilar
 contours are normal.  Pulmonary vasculature is not engorged.  No focal
 consolidation, pleural effusion or pneumothorax is present.  Minimal streaky
 retrocardiac opacity likely reflects atelectasis.  There are mild degenerative
 changes demonstrated in the thoracic spine.

IMPRESSION:
Retrocardiac atelectasis.  Moderate cardiomegaly without evidence of
 congestive heart failure.