Imaging for Cervicogenic Dizziness
MRI of the cervical spine without IV contrast is the appropriate initial imaging modality for evaluating suspected cervicogenic dizziness, as it allows assessment of degenerative disease including facet arthropathy and evaluation of alternative pathology for cervical pain. 1
Rationale and Evidence
The 2025 ACR Appropriateness Criteria specifically addresses cervicogenic headache (Variant 6), which shares pathophysiology with cervicogenic dizziness, both arising from cervical spine dysfunction. The guideline clearly states that MRI cervical spine without IV contrast may be appropriate as an initial imaging modality because it provides comprehensive evaluation of:
- Degenerative changes and facet arthropathy
- Soft tissue structures including neural foramina, spinal canal, and spinal cord
- Alternative pathology that may explain cervical-related symptoms
Alternative Imaging Options
Plain Radiographs
Cervical spine radiographs may serve as an initial screening tool for spondylosis, degenerative disc disease, and malalignment 1. However, radiographs have significant limitations:
- Research shows degenerative changes appear in 74% of patients imaged for vertigo/dizziness, but these findings do not help establish the diagnosis 2
- One study concluded there is "excessive use of cervical radiography" in patients with vertigo and dizziness 2
- Approximately 65% of asymptomatic patients aged 50-59 show significant cervical degeneration on radiographs regardless of symptoms 3
CT Cervical Spine
CT without IV contrast provides excellent bony detail and can detect neuroforaminal stenosis from uncovertebral or facet hypertrophy 3. However, CT is less sensitive than MRI for soft tissue evaluation and nerve root compression assessment.
Clinical Context and Pitfalls
Critical caveat: The diagnosis of cervicogenic dizziness is primarily clinical and made after excluding other causes. Imaging findings must correlate with clinical presentation, as degenerative changes are extremely common in asymptomatic individuals.
When to Image
Consider imaging when:
- Red flag symptoms are present (malignancy, infection, trauma, neurologic deficits)
- Symptoms persist despite conservative management
- Clinical examination suggests structural pathology
- Need to exclude alternative diagnoses (vertebrobasilar insufficiency, vestibular disorders)
What NOT to Do
- Do not order imaging reflexively for all patients with dizziness and neck pain
- Do not interpret degenerative findings as causative without clinical correlation
- Do not use radiographs as the sole imaging modality if structural pathology is suspected
Advanced Imaging Considerations
If MRI is contraindicated or equivocal, CT myelography can be considered for assessment of foraminal stenosis and nerve root compression 3.
For suspected vascular causes (vertebrobasilar insufficiency), CTA or MRA of the neck may be warranted, though this addresses a different pathophysiology than mechanical cervicogenic dizziness 4.
Evidence Quality Note
The ACR guidelines 1 represent the highest quality evidence (2025 update), though they address cervicogenic headache rather than dizziness specifically. The pathophysiology overlaps significantly, making these recommendations applicable. Research evidence 2, 5 supports that radiographic findings correlate poorly with symptoms, reinforcing the need for selective, high-quality imaging with MRI when indicated.