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spine · AP Axial
Cervical Spine AP
Patient supine or erect, back against IR.
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AI Patient · KV Sir
How to perform this view
- 01
Remove earrings, necklaces, dentures.
- 02
Position supine or erect, MSP to midline.
- 03
Raise chin until occlusal plane-mastoid line is perpendicular.
- 04
Angle CR 15-20 deg cephalad.
- 05
Enter at C4 (thyroid cartilage).
- 06
Expose.
Anatomical & patient position
Patient: Patient supine or erect, back against IR.
Part: MSP centred; chin raised so line from occlusal plane to mastoid tip is perpendicular.
Central ray & centring point
15-20 deg cephalad, entering at C4 (inferior thyroid cartilage).
Exposure factors
kVp
70-80 kVp
mAs
8-12 mAs
SID
100 cm
IR size
18 x 24 cm portrait
Grid
Yes
Respiration
Suspended
Clinical indications
- Neck pain, degenerative disease
- Cervical rib
- Post-trauma after lateral clearance
Contraindications & precautions
- Pregnancy (relative) - confirm LMP / 10-day rule, justify exposure and shield where possible
- Suspected unstable spinal injury - do NOT move neck/spine; use cross-table lateral first and keep collar - do not raise chin until lateral cleared
Structures shown & evaluation criteria
- C3-T2 vertebral bodies
- Open intervertebral spaces
- Spinous processes in midline