FINDINGS:
Lungs are fully expanded and clear.
 
 Heart size is at the upper limits of normal or minimally enlarged.  The
 mediastinal silhouette is within normal limits.  There is minimal upper zone
 redistribution, without overt CHF.  No focal infiltrate or pleural effusion is
 detected.

IMPRESSION:
Borderline cardiomegaly.  Mild upper zone redistribution, without overt CHF.