MRI
What is an MRI examination?
An MRI (Magnetic Resonance Imaging) is a non‑invasive and completely painless examination that uses a strong magnet to create highly detailed images of the brain.
For children with epilepsy, MRI is one of the most important techniques for detecting structural abnormalities in the brain, such as:
- cortical dysplasia (when a small part of the cerebral cortex is formed differently than usual),
- scarring (for example after an earlier inflammation or injury),
- developmental brain disorders.
These findings can help explain where the epilepsy originates and which treatment is most appropriate.
Preparation for the examination
When you arrive with your child, you will first be guided to a changing area.
Because the MRI scanner contains a very strong magnet, no metal objects may enter the room.
We therefore ask you to remove:
- shoes, glasses, jewellery and any other metal objects,
- bank cards, keys and identity documents (leave these outside the MRI area),
- any non‑removable piercings must be mentioned to the nurse in advance.
As a parent, you can usually stay in the room with your child during the examination, as long as you are not carrying any metal objects and do not have medical implants that could be affected by the magnet.
How does the MRI examination work?
1. Your child lies down on the examination table.
Around the head, an open measuring device is placed. It does not touch the head but helps to create sharp images.
2. Earplugs and headphones are provided.
The MRI scanner makes loud, rhythmic sounds during imaging.
The headphones reduce the noise and make the procedure more comfortable for children.
3. The table slowly slides into the tunnel.
The tunnel is well lit and ventilated.
Through a window and camera, the medical team keeps constant watch over you and your child.
4. Your child must lie as still as possible during the scan.
Movement leads to unclear images.
Many children can watch a film during the scan via a small mirror attached to the head coil.
The full MRI examination usually takes 20 minutes to one hour, depending on which images are needed.
Contrast agent (used only when necessary)
Sometimes doctors choose to administer a contrast agent through a small injection.
This helps certain brain structures appear more clearly.
The contrast is safe, but not always required.
Your doctor will explain beforehand why it may be used.
What about young children?
For young children, lying still for a long time can be difficult.
In such cases, light sedation or sleep medication may be needed:
- The anaesthesiologist gently puts your child to sleep using a mask.
- This happens quickly — most children fall asleep within seconds.
- A nurse stays with your child throughout the scan.
- After the examination, your child is awakened and you may return to them immediately.
Sedation is only used when necessary and always under strict safety guidelines.
After the examination
Your child may go home immediately once the examination is finished (or once awake if sedation was used).
The MRI images are then carefully reviewed by specialised neuroradiologists and integrated into your child’s multidisciplinary treatment plan.
The results will be discussed with you later by the treating physician.
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