Paranasal sinuses, a-p X-ray
- Falx cerebri (calcified)
- Frontal sinus
- Orbita
- Ethmoidal air cells
- Superior orbital fissure
- Maxillary sinus
- Sagittal suture
- Innominate line (radiology term, tangential view of greater wing of sphenoid bone)
- Hypophyseal fossa (bottom)
- Nasal septum
Paranasal sinuses, a-p, tilted X-ray
- Frontal sinus
- Septum of frontal sinus
- Anterior ethmoidal air cells
- Maxillary sinus
- Posterior ethmoidal air cells
- Sphenoid sinus
- Mastoid air cells
- Orbita
- Foramen rotundum
- Infra-orbital foramen
- Innominate line (radiology term)
- Body of zygomatic bone
- Zygomatic arch
- Oval foramen
- Head of mandible
- Inferior nasal concha
Paranasal sinuses, scout view
Lines #1–7 indicate positions of sections in the following CT series. Sections are 1 mm thick. Prone position with hyperextended neck. Sections #2–6 display the “ostiomeatal complex/unit” comprising the maxillary sinus ostium, infundibulum, uncinate process, hiatus semilunaris, ethmoidal bulla, middle concha and middle meatus. Arrows ←, → and ↔ indicate that a structure can be seen on a previous or following section or both.
Paranasal sinuses, coronal CT
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