Cervical Spine X-Ray AP

Spine Anteroposterior STD
Objective

Cervical vertebral bodies C3–C7, intervertebral spaces and spinous processes.

Positioning

Patient standing or seated with back against the detector.
Chin slightly raised to avoid mandibular superimposition on C1–C2.
Central ray: angled 15–20° cranially to follow the oblique plane of the cervical spine.
Symmetrical alignment.

Centering

C4 (thyroid cartilage)

DR Parameters

65–75 kV · 10–15 mAs
SID ~100–115 cm · no grid

CR Parameters

65–75 kV · 15–25 mAs · SID ~100–115 cm

Quality criteria

C3–C7 visualised.
Intervertebral spaces open and visible.
Spinous processes centred.
No rotation.

Common errors

No cranial angulation (closed intervertebral spaces).
Patient rotation.
Mandibular superimposition on C1–C2.
Movement.

Practical notes

Ask the patient not to swallow during exposure.
C1–C2 better visualised with the open-mouth (odontoid) view.
Cranial angulation essential to open the disc spaces.