ARRT Head and Neck Procedures 4

Question 1

Which special projection of the temporal bone is used to demonstrate the mastoid air cells in a tangential view?

Accepted Answer

Law method

Answer

The Law method (modified Law) is an axiolateral oblique projection used to demonstrate mastoid air cells in profile.

Question 2

For the AP axial projection of the mandible (Towne variant), the CR is directed at approximately what angle?

Accepted Answer

35° caudad

Answer

For the Towne variant used to show the mandibular condyles, the CR is directed 35° caudad to the OML.

Question 3

A patient with suspected Jefferson fracture of C1 should be imaged with which view as the priority?

Accepted Answer

Open-mouth AP (odontoid)

Answer

The open-mouth AP (odontoid) view demonstrates the C1 lateral masses and C2 dens to evaluate for Jefferson or odontoid fractures.

Question 4

The hyoid bone is located at the level of which cervical vertebra?

Accepted Answer

C3

Answer

The hyoid bone is located at the level of C3 and serves as a useful landmark when positioning lateral neck radiographs.

Question 5

On the PA Caldwell projection of the skull, the central ray exits at which landmark?

Accepted Answer

Nasion

Answer

On the PA Caldwell projection, the CR exits at the nasion (bridge of the nose) after entering the posterior skull.

ARRT - American Registry of Radiologic Technologists Practice Test