In radiographic imaging, which structure serves as a stable landmark in lateral views?

• A. Mandible
• B. Hyoid bone
• C. Air of oropharyngeal airway
• D. Cervical spine

Answer: (D)

In lateral radiographs, you rely on a structure that stays put so you can orient the image and compare it across views. The cervical spine provides that stable reference because its vertebral bodies are rigid bones that maintain their positions regardless of jaw movement, swallowing, or breathing. This consistency makes the cervical spine the best landmark for assessing alignment and positioning in a side view.

The other structures are more variable: the mandible can move with mouth opening and jaw activity, the hyoid bone shifts with swallowing and tongue posture, and the air-filled oropharyngeal space changes with respiration and soft tissue movement. None of these offer the same reliable stability as the cervical spine.