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spine · Anterior/Posterior Oblique 45 deg
Cervical Spine Obliques
Patient erect, body rotated 45 deg.
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AI Patient · KV Sir
How to perform this view
- 01
Rotate whole body 45 deg (RAO/LAO shows down-side foramina; RPO/LPO shows up-side).
- 02
Raise chin, look straight ahead.
- 03
AP oblique: 15-20 deg cephalad; PA oblique: 15-20 deg caudad.
- 04
Centre to C4.
- 05
Do both sides.
Anatomical & patient position
Patient: Patient erect, body rotated 45 deg.
Part: Chin raised slightly; head turned to parallel IR.
Central ray & centring point
15-20 deg cephalad (posterior oblique) to C4.
Exposure factors
kVp
75-80 kVp
mAs
10-12 mAs
SID
150-180 cm
IR size
24 x 30 cm
Grid
Yes
Respiration
Suspended
Clinical indications
- Intervertebral foramina narrowing
- Radiculopathy, facet disease
Contraindications & precautions
- Suspected unstable spinal injury - do NOT move neck/spine; use cross-table lateral first and keep collar
- Pregnancy (relative) - confirm LMP / 10-day rule, justify exposure and shield where possible
Structures shown & evaluation criteria
- Open intervertebral foramina C2-C7
- Pedicles