MRI scan — spine

Category: Imaging & Scans · All imaging & scans

MRI scan — spine — Imaging & Scans

What it is

An MRI scan of the spine uses a magnet and radio waves to picture the spinal bones, discs, spinal cord and nerves in fine detail, without using X-rays.

Why it is done

It is commonly used for persistent back or neck pain with leg or arm symptoms, suspected slipped disc or trapped nerve, and to look for infection, tumours or spinal cord problems.

How to prepare

You will complete a metal-safety questionnaire and remove metal items. Most people do not need to fast. Tell the team if you have implants, a pacemaker or anxiety about enclosed spaces.

What happens during the procedure

You lie on your back on a table that moves into the scanner. The machine is noisy and you will wear ear protection. Keeping still is important; the scan usually takes 20 to 40 minutes depending on how much of the spine is scanned.

Afterwards — recovery & results

You can go home afterwards and carry on as normal. The report goes to your doctor, who will relate the pictures to your symptoms — many scan findings, such as disc bulges, are also seen in people with no pain at all.

Risks & considerations

MRI uses no ionising radiation. Risks are mainly those of the magnet for people with certain implants, and discomfort or anxiety during the scan. Contrast dye is sometimes used and is used cautiously in severe kidney disease.

Frequently asked questions

My scan shows a disc bulge — does that mean I need surgery?

Not usually. Disc bulges are very common in people without any symptoms. Your doctor interprets the scan together with your examination and will discuss the options, which often start with non-surgical treatment.

How is MRI different from CT for the spine?

MRI shows discs, nerves and the spinal cord much more clearly, while CT shows bone detail well and is quicker. Your doctor chooses based on the question being asked.

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Please note: This page is educational information about a medical procedure or test. It does not replace the instructions of your own care team, who know your situation and whose preparation, fasting and medication advice you should follow if it differs from anything here. If you have symptoms that worry you, or an appointment you do not understand, contact your clinical team.