CT
Axial non-contrast
Coronal non-contrast
Coronal bone window
Axial bone window
Bifrontal pneumocephalus which separates the mesial portions of the frontal lobes away from the falx indicating tension (Mount Fuji sign). This is secondary to a fracture involving the inner table of the left frontal sinus, presumably acting like a valve to let air in but not out. Inferior frontal lobe haemorrhagic contusion is also seen on the right. Evidence of old right MCA infarct with gliosis.