Radiology BDS4 Flashcards
What does a maxillofacial view show?
Facial bones
What is collimation
Control of size and shape of Xray beam
Rectangular reduces dose
How is the Frankfort plane measured
From inferior border of infraorbital rim with superior external auditory meatus
Indications for lateral skull (3)
Fractures of skull
Fractures of face
Skull pathology
What does an occipitomental view show?
Orbit
Maxillary sinus
Zygoma
Nasal septum
Coronoid process
Indications for an occipitomental view
Middle 3rd facial fractures
Coronoid process fractures
Indications for a PA mandible
Mandible fractures (angle/posterior body/ramus)
Cysts/tumours in this area
Indication for Submentovertex view
Zygomatic arch fracture
Best xray to view maxillary sinus
CBCT
Why does an Xray appear radiopaque?
Increased:
Attenuation
Density
Thickness
Why do we image salivary glands? (3)
- Dry mouth
- Obstructions (stones, mucous plugs, neoplasia)
- Swelling
Why do we use ultrasound imaging for salivary glands? (4)
- Can give citric acid to increase saliva and show ducts more clearly
- No ionising radiation
- Glands are superficially positioned (apart from deep lobe of parotid)
- Can assess vascularity, ductal dilatation
Methods of imaging for salivary obstruction (3)
- US
- Mandibular true occlusal
- Sialography
What gland are most sialoliths associated with?
Submandibular gland
