What landmark helps you identify C4 on a cervical radiograph?

What landmark helps you identify C4 on a cervical radiograph?

• A. Roughly at the level of the laryngeal prominence; center the CR near C4.
• B. At the level of the mastoid process.
• C. At the level of the spinous process of C3.
• D. At the level of the angle of the mandible.

Answer: (A)