ARRT - American Registry of Radiologic Technologists Head and Neck Procedures Questions and Answers

Question 1

For a parietoacanthial projection (Waters method) of the facial bones, what is the correct relationship between the positioning lines and the image receptor (IR) to best demonstrate the maxillary sinuses?

Accepted Answer

Mentomeatal line (MML) is perpendicular to the IR, placing the OML at a 37-degree angle to the IR.

Answer

Orbitomeatal line (OML) is perpendicular to the IR.

Answer

Midsagittal plane (MSP) is parallel to the IR.

Answer

Acanthomeatal line (AML) forms a 37-degree angle with the IR.

Question 2

A patient arrives in the emergency department with potential facial trauma. The physician suspects a depressed fracture of the right zygomatic arch. Which of the following projections would best demonstrate this specific injury with minimal superimposition?

Accepted Answer

Submentovertical (SMV) projection.

Answer

PA axial (Caldwell method) with a 15-degree caudal angle.

Answer

Lateral projection of the facial bones.

Answer

Parietoacanthial (Waters method).

Question 3

When performing a cross-table lateral projection of the cervical spine on a trauma patient, what is the most critical anatomical landmark to ensure is included on the image for it to be considered diagnostically complete?

Accepted Answer

The top of the T1 vertebral body.

Answer

The sella turcica.

Answer

The spinous process of C2 (axis).

Answer

The mastoid tips.

Question 4

Which of the following radiographic projections of the skull is specifically designed to demonstrate the petrous pyramids, internal auditory canals, and mastoid air cells of the temporal bone?

Accepted Answer

Axioanterior oblique posterior (Stenvers method)

Answer

AP Axial (Towne method)

Answer

PA (Caldwell method)

Answer

Parietoacanthial (Waters method)

Question 5

A patient is scheduled for a sialography procedure to evaluate the submandibular gland. Which of the following is a primary clinical indication for this examination?

Accepted Answer

To investigate suspected calculi or strictures in the salivary duct.

Answer

To assess for sinusitis.

Answer

To diagnose a fracture of the mandible.

Answer

To rule out temporomandibular joint (TMJ) dysfunction.

Question 6

In a lateral projection of the paranasal sinuses, the central ray should be directed to a point:

Accepted Answer

Midway between the outer canthus and the EAM.

Answer

At the nasion.

Answer

2 inches superior to the EAM.

Answer

At the acanthion.