FINDINGS:
Lung volumes are lower than in .  Linear bilateral opacities are
 unchanged from , consistent with scarring.  Mediastinal contours, hila and
 cardiac silhouette are stable from .  No pneumothorax or pleural
 effusion.  No osseous abnormality within the limits of plain radiography.

IMPRESSION:
1. No osseous abnormality within the limits of plain radiography.
 2. Stable mediastinum from .  If concern for dissection, CTA chest
 should be performed.