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Having an MRI scan

A magnetic resonance imaging (MRI) scan provides detailed pictures of the inside of your body. The scanner is a large tube that you lie in. It can give us information that helps us make a diagnosis and find the best treatment for you.

Unlike X-rays and CT scans, MRI scans do not use ionising radiation. It is a very safe procedure for most people.  However, the scan uses strong magnets. This means it might not be suitable if you have any metal in your body (such as heart pacemakers).

We'll ask you to complete and sign a safety questionnaire before your scan, to make sure it is safe for you to be scanned.

You can read more about  MRI scans on the NHS website.

Preparing for your scan

If we do need you to do anything (like stopping eating or drinking), we will let you know in your appointment letter.

If you are taking medicines, continue to take them.

We do not have childcare facilities. Please do not bring children or dependants with you.

We do not offer any sedatives if you are feeling anxious. You are welcome to call us beforehand if you have any particular concerns.

For your appointment, please:

  • wear loose-fitting clothes, as you will need to remove them to change into a hospital gown for your scan
  • remove anything magnetic, including watches, jewellery, hairclips, wigs, dentures (the scan will not affect dental fillings)
  • bring a CD of your choice if you would like to listen to music during your scan
  • leave your valuables at home.

Having an injection before your MRI

If we're scanning certain areas of your body, we might need to give you an injection of MRI contrast. The contrast shows up on the scan to give a more detailed picture. We'll give you the injection by putting a small needle into a vein in your arm or hand.

If you need contrast, there's a small risk you could have an allergic reaction.

Before having the injection, you should let staff know if you:

  • have a history of allergic reactions
  • have kidney problems
  • are pregnant, breast feeding or think you could be pregnant.

After your MRI

As soon as the scan is finished, you can leave the hospital or return to the ward.  You can eat and drink as usual, and do your usual activities.

If you had an injection of contrast, an allergic reaction can happen up to 2 days after the scan. If you think you are having an allergic reaction, contact your GP for advice.

Out of hours, please go to your nearest emergency department (A&E).