MRI scans
MRI brain
A detailed scan of the brain that shows its structure, white matter, ventricles and major vessels.
What to expect
- Preparation: Usually none - eat, drink and take medication as normal unless told otherwise. You will complete a safety questionnaire covering implants and previous surgery, and remove all metal items before the scan.
- During the test: You lie on a motorised couch that moves into the scanner. The machine is noisy, you wear ear protection, and you need to keep as still as possible. Most MRI examinations take 20-45 minutes.
- Results: A consultant radiologist reports the scan, typically within 24-72 hours of your appointment.
- Who follows up: The report goes to your referring GP or specialist, who explains the findings and arranges any follow-up.
- Cost: an indicative cost varies by provider.
About this test
A detailed scan of the brain that shows its structure, white matter, ventricles and major vessels. It is usually recommended for persistent or changing headaches, dizziness, visual disturbance, seizures or other neurological symptoms.
How to access it privately
You can arrange a private MRI either with a referral from your GP or specialist or, for many scans, by self-referring as a self-pay patient with a short pre-scan questionnaire. Routine NHS diagnostic waits are often long - frequently measured in months - whereas private slots are typically available within days to around two weeks. Costs vary by provider and should be confirmed with the provider before booking.
Frequently asked
Common questions about MRI brain.
Quick, plain-English answers to what people ask us most.
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What is a brain MRI and what does it show?
A brain MRI uses magnetic fields and radio waves to build detailed images of the brain's structure, including grey and white matter, blood vessels and fluid spaces. It's particularly good at picking up soft-tissue changes that other scans, such as CT, may not show as clearly.
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Why would a doctor order a brain MRI?
Common reasons include persistent or unusual headaches, dizziness, memory concerns, suspected stroke or multiple sclerosis, seizures, or to investigate other neurological symptoms. It's also used to monitor known conditions over time.
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Do I need to prepare for a brain MRI?
Little specific preparation is usually needed, though you should mention any metal implants, pacemakers, or previous surgery with metalwork when booking, as these affect MRI safety. If contrast dye may be used, let the team know about allergies or kidney problems.
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What happens during the scan?
You lie on a table that slides into the scanner, with your head positioned in a padded coil, and the scan generally takes 20 to 40 minutes depending on how many sequences are needed. You'll hear loud knocking noises throughout, so ear protection is provided.
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Does a brain MRI hurt, and are there any risks?
The scan itself is painless and doesn't involve radiation, making it very safe for repeat imaging when needed. The main challenge for some people is the enclosed space, so mention any claustrophobia when booking as options such as a wider bore scanner may help.
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How long do results take?
A radiologist reviews and reports on the images, with private scans typically turned around within a few working days. Your doctor will then talk you through the findings and what, if anything, needs to happen next.
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What do abnormal results mean?
Findings can range from minor, incidental changes that need no action to more significant issues that require further investigation or treatment. It's always best to discuss the specific wording of your report with the doctor who requested the scan rather than trying to interpret it alone.
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How much does a private brain MRI cost, and is it available on the NHS?
Brain MRI is available on the NHS, though non-urgent referrals can involve a wait of some weeks or months. Privately, scans are usually available within days, with prompt specialist reporting; cost varies by provider.
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Is a brain MRI accurate and reliable?
MRI is considered the gold-standard imaging test for most brain conditions, offering excellent detail of soft tissue. As with any scan, its value depends on being interpreted alongside your symptoms and medical history by an experienced radiologist.
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How do I book a private brain MRI, and how quickly can I be seen?
Private imaging providers can often arrange a brain MRI within a few days, sometimes sooner for urgent symptoms, with or without a GP referral. Contact a provider directly to check current availability.