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

• What's new since my last MRI — new lesions, active areas, anything that's changed?
• What types of lesions am I showing — T2 (general), T1 'black holes' (more permanent damage), gadolinium-enhancing (active right now)? What does each kind tell you?
• Where are the lesions — brain or spine, and what parts?
• Which lesions are the most concerning — and what does that tell you about how my MS is going?
• Do the lesion locations explain the symptoms I've been having?

Frequently asked

Related terms

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