MRI-scan

During an MRI scan (Magnetic Resonance Imaging), certain signals are generated in the body using a large, strong magnet and radio waves. These signals are subsequently received by an antenna. Therefore, no X-rays are used in an MRI examination. A computer then processes the signals into an image that can be viewed on a screen.

Is an MRI examination safe?

Not everyone can undergo an MRI examination. Metal-containing objects in the body can be a contraindication because they can be influenced by the strong magnet of the scanner. Possible examples are pacemakers/defibrillators (mainly the older types), metal pieces in the eye (metal workers), catheters, insulin pumps, vascular clips, cochlear implants, and so on. Please always discuss this in advance with your referring doctor or, if in doubt, consult the radiology department.

There are no known (short- and long-term) side effects of an MRI, provided the patient does not have a contraindicated implant.

Patients with known or risk of renal damage should have their renal function assessed before an MRI is performed to determine whether administration of gadolinium contrast should be avoided.

Gadolinium contrast is generally very safe but has a low incidence of hypersensitivity/allergic reactions (about 1 in 1,000 mild reactions and 1 in 10,000 severe reactions).

What about pregnancy?

Scanning during the first trimester of pregnancy is generally avoided, although the risks are theoretical and probably small, but not clinically established. If this is necessary, it must be discussed in advance between the treating physician and the radiologist. Gadolinium-based contrast agents are usually contraindicated during pregnancy.

Course

Before the examination

Since there is a large strong magnetic field throughout the room, it is prohibited for safety reasons to bring in any metal object and/or electronics. You will therefore be asked to remove all metal objects and/or clothing containing metal and, if necessary, simply put on a bathrobe. Glasses, dentures, and hearing aids are also not allowed in the scanning room. If you wear a pacemaker or other implanted device (e.g. neurostimulator), be sure to ask your treating physician whether the device is MRI-compatible.

If you have the slightest doubt, you will be refused access to the examination room for the sake of your and our safety. When the examination concerns the head or neck area, it is important not to use make-up or hairspray.

You may eat and drink before an MRI examination, even if you have to undergo an examination with a contrast agent. There is only one exception to this rule: you are not allowed to eat or drink before an MRI examination of the abdomen. Only your own medication may be taken with a very small amount of water.

During the examination

During the examination, it is important to lie as still as possible and relax as much as possible. Depending on which part of the body is examined, the examination takes 15 to 40 minutes. Performing an MRI (Magnetic Resonance Imaging) is accompanied by a loud, knocking, and monotonous sound. To reduce the loudness, you will receive headphones and, if desired, extra earplugs.

During the examination, you will lie on a table that is slid into a tunnel. The tunnel is open on both sides. If a problem occurs during the scan, you can always alert the nurse by using the emergency button.

If you suffer from claustrophobia, discuss this in advance with your treating doctor so that he can prescribe the necessary medication and you can take it with you to the examination. If you have to take this medication, always make sure that you have a companion with you, because in that case you are not allowed to drive home yourself in the car.

After the examination

The radiologist makes a report of the image findings. You will receive a code/link with which the images and the report can be viewed by yourself and the requesting doctor. The referring doctor will discuss the radiologic results with you.