Radiographic Technique

When performing a PA projection of the skull, which of the following lines or planes should be perpendicular to the image receptor (IR)?

• Midsagittal plane and IOML

• Midcoronal plane and IOML

• Midsagittal plane and OML

• Midcoronal plane and interpupillary line

What is the appropriate degree and direction of central ray angulation for a PA projection of the skull?

• 30 degrees cephalad

• 0 degrees (perpendicular)

• 15 degrees caudad

• 37 degrees caudad

What is the central ray exit point for a PA skull radiograph?

Which of the following skull projections will demonstrate the sella turcica in profile?

• PA skull

• AP skull

• AP axial skull (Towne)

• Lateral skull

Label 6

c

Glabella

Mentomeatal

Nasion

Acanthion

What is this Projection?

b

AP Axial skull

PA Axial skull

Lateral skull

Match the following

• Nasion

• 7

• Glabella

• 2

• Inferior orbital line

• 9

• Mental Point

• 5

• Acanthion

• 6

The occipital bone is best demonstrated on which projection of the skull?

• PA skull

• PA axial skull (Caldwell)

• AP axial skull (Towne)

• Lateral skull

Which is the "Orbitomeatal Line"

True or False:

The petrous ridges projected below the maxillary sinuses is a criteria for an acceptable waters method.

• True

• False