FINDINGS:
Patient is somewhat rotated to the right.  Patient is status post median
 sternotomy.Right lower lobe opacity with blunting of the posterior
 costophrenic angle is worrisome for pneumonia and pleural effusion.  No
 pneumothorax is seen. The cardiac and mediastinal silhouettes are
 unremarkable.

IMPRESSION:
Right lower lobe opacity worrisome for pneumonia and small pleural effusion. 
 Subtle left base opacity may be due to atelectasis.