FINDINGS:
Interval resolution of patchy right upper lobe opacity, which may
 have been due to contusion or aspiration.  Lungs are otherwise clear.  Right
 hemidiaphragm is mildly elevated.  There is no pleural effusion or
 pneumothorax.  Known L1 fracture is seen to better detail on recent CT.

IMPRESSION:
Resolution of right upper lobe opacity may have been due to
 contusion or aspiration.