[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Radiology](https://durgical.com/en/radiology/) › [Musculoskeletal](https://durgical.com/en/radiology/areas/msk/) › Cervical spine imaging in trauma: who needs it

# Cervical spine imaging in trauma: who needs it

- Choosing a study

After an accident, simple bedside rules tell who can skip neck imaging; those who need it usually get a CT scan, and MRI if nerves or the cord may be hurt.

Updated Nov 13, 2026

## Key points

- NEXUS: midline tenderness, neuro deficit, alertness, intoxication, distracting injury.
- Canadian rule: high risk (≥65, dangerous mechanism, paresthesias) → image; else low risk → test rotation 45°.
- Adults who need imaging get CT, not plain films.
- MRI for neurological deficit or suspected cord or ligament injury.
- Older adults and fused spines: low threshold, often unstable.

## What it is

Most alert patients with neck pain after trauma do not have a fracture, and two validated decision rules, NEXUS and the Canadian C-spine rule, identify who can be cleared without imaging. Both apply only to alert, stable patients. When imaging is needed in an adult, CT of the cervical spine is the first study: it is faster and far more sensitive than plain X-rays, which are reserved for low-risk situations or where CT is not available. MRI is added when there is a neurological deficit, suspected ligament, disc or cord injury, or when an obtunded patient cannot be examined and concern persists. Older adults deserve a low threshold: a fall from standing can fracture a stiff, osteoporotic neck, most often at C2 (the odontoid), and spines fused by ankylosing spondylitis or DISH break like a long bone and are often unstable. The collar stays on until the spine is cleared clinically or by imaging.

## How to decide

- NEXUS: no imaging needed if all five are present: no posterior midline tenderness, no focal neurological deficit, normal alertness, no intoxication, no painful distracting injury.
- Canadian C-spine rule, step 1: any high-risk factor (age 65 or older, dangerous mechanism, numbness or tingling in the limbs) → image.
- Dangerous mechanism: fall from about one metre or five stairs, axial load to the head, high-speed crash, rollover or ejection, motorized recreational vehicle, bicycle collision.
- Step 2: a low-risk factor (simple rear-end crash, sitting in the emergency department, walking at any time, delayed neck pain, no midline tenderness) allows testing range of motion.
- Step 3: if the patient can actively turn the head 45° to the left and right, no imaging is needed; if not, image.
- If X-rays are used: lateral, AP and open-mouth odontoid views; the lateral must show C7–T1 and four smooth lines (anterior and posterior vertebral, spinolaminar, spinous tips).

| Situation | First study | Why |
| --- | --- | --- |
| Alert adult, low risk by NEXUS or the Canadian rule | No imaging | Rule-negative patients have a very low chance of a significant injury |
| Adult who needs imaging (rule positive) | CT cervical spine | More sensitive and faster than X-ray; shows fracture pattern |
| Neurological deficit or suspected cord or ligament injury | CT, then MRI | MRI shows cord, discs, ligaments and haematoma |
| Obtunded or intubated patient | CT (often with head CT); MRI if concern persists | The rules cannot be applied without a reliable examination |
| Older adult after a fall from standing | CT, low threshold | Osteoporotic bone and odontoid fractures; pain may be mild |
| Ankylosing spondylitis or DISH after any trauma | CT, often plus MRI | The fused spine fractures easily and is often unstable |
| Child, low suspicion | Clinical clearance or X-ray first | Spare radiation to the thyroid; CT or MRI if X-ray abnormal or concern high |

## Common mistakes

- Applying NEXUS or the Canadian rule to a drunk, confused or distracted patient: the rules are not valid there.
- Accepting a lateral X-ray that does not reach C7–T1: injuries at the cervicothoracic junction are missed.
- Clearing an older adult because the mechanism was «only» a fall from standing.
- Removing the collar after a normal CT in a patient with a new neurological deficit: MRI is needed.
- Overlooking prevertebral soft-tissue swelling, an indirect sign of a hidden injury.

## Next step

- Rule-negative alert patient: clinical clearance; remove the collar and document the rule used.
- Rule-positive adult: CT of the cervical spine, keeping the collar on until it is read.
- Fracture on CT, neurological signs or a fused spine: call spine surgery or neurosurgery and request MRI.
- Obtunded patient with a normal high-quality CT: follow the local protocol and discuss collar removal or MRI with a senior.
- Child: involve the senior and the radiologist to choose the lowest-radiation study that answers the question.

## Test yourself

Think of the answer, then tap the question to see it.

## What are the five NEXUS criteria that must all be met to skip cervical spine imaging?

No posterior midline tenderness, no focal neurological deficit, normal alertness, no intoxication and no painful distracting injury.

## Which high-risk factors in the Canadian C-spine rule mean imaging is needed?

Age 65 or older, a dangerous mechanism, or numbness or tingling in the limbs.

## What is the first-line imaging study for an adult whose cervical spine cannot be cleared clinically?

CT of the cervical spine, which is faster and more sensitive than plain X-rays.

## Why do patients with ankylosing spondylitis need a low threshold for imaging after minor trauma?

Their fused, brittle spine breaks like a long bone, the fractures are often unstable and can be subtle, so CT and often MRI are needed.

[Add to my cards (4)](https://durgical.app/estudiar/?add=/en/radiology/cervical-spine-imaging-in-trauma-who-needs-it/)

## Elsewhere in DurgiPedia

- [Spine examination: the Adams forward-bend test and Schober test](https://durgical.com/en/clinical-exam/spine-examination-the-adams-forward-bend-test-and-schober-test/)
- [The neurological examination: order and screening exam](https://durgical.com/en/clinical-exam/the-neurological-examination-order-and-screening-exam/)

## Connections

## Related 6

- [Head trauma: who needs a CT (Canadian CT head rule)](https://durgical.com/en/radiology/head-trauma-who-needs-a-ct/)
- [Spine MRI: cord compression, disc and infection](https://durgical.com/en/radiology/spine-mri-cord-compression-disc-and-infection/)
- [CT: windows, Hounsfield units and contrast phases](https://durgical.com/en/radiology/ct-windows-hounsfield-units-and-contrast-phases/)
- [Requesting a study and reading the report](https://durgical.com/en/radiology/requesting-a-study-and-reading-the-report/)
- [Choosing the right study: appropriateness and incidental findings](https://durgical.com/en/radiology/choosing-the-right-study-appropriateness-and-incidental-findings/)
- [Radiation in medical imaging: risk, ALARA and pregnancy](https://durgical.com/en/radiology/radiation-in-medical-imaging-risk-alara-and-pregnancy/)

## Related conditions 5

- [Cervical spine fracture](https://durgical.com/en/conditions/cervical-spine-fracture/)
- [Spinal cord injury](https://durgical.com/en/conditions/spinal-cord-injury/)
- [Whiplash (cervical sprain)](https://durgical.com/en/conditions/whiplash/)
- [Major trauma (polytrauma): ATLS primary survey](https://durgical.com/en/conditions/major-trauma-atls-primary-survey/)
- [Cervical Spondylosis](https://durgical.com/en/conditions/cervical-spondylosis/)

[← All of radiology](https://durgical.com/en/radiology/)

Educational content; it does not replace a radiologist's report and is not a clinical instruction. Each study is ordered on the patient's assessment and your institution's protocols.

Sources: [Cervical Spine Fractures Overview](https://www.ncbi.nlm.nih.gov/books/NBK448129/) (StatPearls (NCBI Bookshelf), 2023); [Geriatric Cervical Spine Injury](https://www.ncbi.nlm.nih.gov/books/NBK470375/) (StatPearls (NCBI Bookshelf), 2023).

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Representative model, for educational purposes only.

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Source: https://durgical.com/en/radiology/cervical-spine-imaging-in-trauma-who-needs-it/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/radiology/cervical-spine-imaging-in-trauma-who-needs-it/