These
two projections show the frontal and maxillary sinuses to their best advantage.
The maxillary antrum is seen on the occipito-mental view; in particular, the
roof of the antrum, the floor of the orbit, is clearly visualized. The frontal
sinus is seen on both views. Look for sinus abnormalities such as mucosal
thickening and fluid levels. Also check for facial fractures. The infra-orbital
foramen and the foramen rotundum can be seen on these projections.
