IMPRESSION:
Previous moderate pulmonary edema has substantially improved, with some
 residual in the right apex, and a larger region in the right lower lobe
 suggesting concurrent pneumonia. Hyperinflation, increased after resolution of
 edema, indicates emphysema. Cardiomediastinal silhouette is normal.
 
 Right lower lobe pneumonia was described in the report of the chest CT
 performed 3 hr earlier.