FINDINGS:
Lung volumes remain low.  The heart size remains moderately enlarged but
 unchanged.  The mediastinal contours remain similar, with a markedly tortuous
 aorta again demonstrated.  There is crowding of the bronchovascular
 structures, but without overt pulmonary edema demonstrated.  Mild atelectatic
 changes are also noted at the lung bases.  No pleural effusion, focal
 consolidation or pneumothorax is seen.  There are moderate multilevel
 degenerative changes in the thoracic spine.

IMPRESSION:
Low lung volumes with mild bibasilar atelectasis.