MRI (Magnetic Resonance Imaging)
What it is
An MRI is a scan that uses strong magnets and radio waves to make detailed pictures of the brain and spinal cord. In MS, it is used to look for areas of nerve damage and to track changes over time. It does not use X-rays or radiation.
What you might notice
You lie still in a tube-shaped machine for 30 to 60 minutes. It is loud, so you wear earplugs or headphones. Some scans use an IV contrast dye.
Why it matters for you
MRIs are a big part of MS diagnosis and follow-up. Understanding what the test is looking for can make the appointments and results feel less intimidating.
Questions to ask your doctor
- How many new or enlarging lesions are there?
- Is there any enhancing (active) activity?
- How does this compare to my last scan?
- What areas of the brain or spine are affected?
- Does this change my treatment plan?
Frequently asked
Related terms
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Not medical advice. Always consult your care team.