IMPRESSION:
As compared to the previous radiograph, there is a minimally improved
 radiolucency of the lung parenchyma on the left, potentially reflecting
 improved ventilation. Otherwise, the very widespread parenchymal changes, pre
 described in the previous examination as well as the postoperative changes on
 the right, with displaced rib fractures, are constant.  Unchanged size of the
 cardiac silhouette.