ARRT Head and Neck Procedures 5

Question 1

Which projection of the paranasal sinuses requires the patient to be erect with a horizontal beam to demonstrate air-fluid levels?

Accepted Answer

All paranasal sinus projections

Answer

All projections of the paranasal sinuses must be performed erect with a horizontal beam so that air-fluid levels can be demonstrated within the sinuses.

Question 2

The Stenvers projection (posterior profile) of the temporal bone demonstrates which structure in profile?

Accepted Answer

Petrous pyramid

Answer

The Stenvers projection places the petrous pyramid in profile, demonstrating the internal auditory canal and semicircular canals.

Question 3

On a lateral projection of the skull, the EAMs (external auditory meatuses) should be superimposed — what does separation of the EAMs indicate?

Accepted Answer

Rotation

Answer

Separation of the EAMs on a lateral skull indicates rotation of the patient's head from the true lateral position.

Question 4

Which projection of the facial bones best demonstrates the orbital floors and blow-out fractures?

Accepted Answer

Parietoacanthial (Waters)

Answer

The Waters projection best demonstrates the orbital floors, maxillary sinuses, and is used to detect blow-out fractures of the orbital floor.

Question 5

A patient cannot extend their neck for a standard AP open-mouth odontoid view. Which alternative projection demonstrates the dens?

Accepted Answer

Fuchs method (AP axial)

Answer

The Fuchs method is an AP axial projection with the CR directed toward the mentum, projecting the dens through the foramen magnum when the mouth cannot be opened.

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT - American Registry of Radiologic Technologists Practice Test

ARRT Head and Neck Procedures 5