FINDINGS:
There is bibasilar atelectasis.  Lung volumes are normal.  There is
 mild cardiomegaly, similar to the prior study.  There is no large pleural
 effusion or pneumothorax.  There is mild prominence of the central pulmonary
 vasculature, but no frank pulmonary edema.

IMPRESSION:
Mild bibasilar atelectasis, similar to the prior chest
 radiograph.