In the open mouth projection for the cervical spine, the goal is to clearly visualize:
The zygapophyseal joints between C1 and C2
The odontoid process (dens)
Align the lower edge of the upper incisors with the base of the skull to achieve the proper angle.
Teeth over the dens? Raise the patient’s chin.
Base of skull over the dens? Lower the patient’s chin.
Proper positioning ensures unobstructed visualization of critical anatomy for accurate diagnosis.
