Cranium Review

How many bones make up the cranium?

• 4

• 6

• 8

• 10

Often a patient cannot be turned into the prone position for a PA axial projection of the skull (Caldwell method). What central-ray angle would be used if the AP axial projection is used instead?

• 
  

• 10 degrees caudal

• 15 degrees cephalic

• 10-15 degrees caudal

• 10-15 degrees cephalic

Radiographic demonstration of the cranial base is performed by which method?

• 
  

• Haas

• Caldwell

• Towne

• Schuller

What line is this?

• orbitomeatal

• mentomeatal

• acanthiomeatal

• infraorbitomeatal

Where does the central ray enter for the AP axial projection (modified Townes) of the TMJ?

• 
  

• at the nasion

• 1in above nasion

• 2in above nasion

• 3in above nasion

Which cranial bone is cube-shaped and consists of a horizontal plate, vertical plate, and spongy lateral masses?

• 
  

• sphenoid

• frontal

• ethmoid

• parietal

For an SMV projection of the cranial base, the center ray enters the MSP of the throat between the angles of the mandible and passes through a point ____ inches anterior to the level of the EAM.

• 
  

• 1/2

• 3/4

• 1

• 2

How many bones make up the face?

• 4

• 10

• 12

• 14

All of these structures are demonstrated on an AP axial (Towne method) projection of the skull, except

• 
  

• frontal bone

• foramen magnum

• dorsum sellae

• petrous ridges

Which line is placed perpendicular to the plane of the image receptor for the PA projection of the mandibular rami?

• 
  

• infraorbitomeatal

• orbitomeatal

• mentomeatal

• acanthiomeatal