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AP Sinuses

On AP view of the sinuses, the petrous ridge of the temporal bone and mastoid air cells overlap and partially obscure the lower orbits and maxillary sinuses. In order to better evaluate the maxillary sinuses, a special view (Waters) is obtained, shown on the next page.

Identify the following:

1. inferior concha (turbinate)

2. nasal septum

3. nasal cavity

4. maxillary sinus

5. ethmoid sinus (air cells)

6. frontal sinus

7. petrous ridge of temporal bone

8. orbit