MRI/MRA Scan

Magnetic resonance imaging (MRI)/magnetic resonance (REZ-oh-nentz) angiography (MRA), is a test that uses powerful magnets, invisible radio waves, and a computer to scan the body and take clear, detailed pictures of organs and other structures.

• MRI/MRA pictures gives doctors very detailed pictures of tendons, blood vessels and other organs, such as the brain, because the imaging waves pass through the bones.
• These detailed pictures give doctors information that they cannot learn from a physical examination.
• This scan does not involve radiation exposure.

You may want to bring along a “comfort” item—such as a favorite stuffed animal or “blankie”—for your child to hold during the scan.

Depending on what part of your child’s body is being scanned, there may be important instructions on things to do or not do the day before and the day of your child’s MRI/MRA scan. Please follow the specific instructions given to you by your doctor before the scan.

Your child's scan will be done by an MRI/MRA technologist who is specially trained to do MRI/MRA scans on children, and the results will be read by the radiology doctors at the  Department of Pediatric Radiology at Children’s Hospital.

In the scan room will be the MRI/MRA machine. You will see a long table that will slide into tube-shaped or tunnel-like scanner where the camera is located.

Prior to the test, your child will be screened for any metal inside or outside his or her body. If your child’s clothing contains metal, he or she may be asked to change into a hospital gown. You and your child will be able to safely keep any personal belongings that contain metal in a locker during the scan.

• Your child will lie down on the table.
• The MRI/MRA technologist will place a wide strap across your child’s waist to help your child stay still during the test. If your child is having a scan of his or her head, the MRI/MRA technologist will help put his or her head into an open “head coil,” which looks like a helmet.
• Once your child is in position on the table, the MRI/MRA technologist will move the table into the MRI/MRA scanner so that the body part of your child that is being tested is under the camera.
• The MRI/MRA machine will make loud banging and knocking noises during the scan. You and your child will be given a set of foam earplugs to help protect your ears from the noise of the scanner.
• If your child does not need sedation, he or she may also select either music CDs or a movie to watch with special MRI/MRA goggles and headphones, instead of earplugs.
• During the MRI/MRA scan, the staff will be in the control space and will monitor you and your child through a large window. Communication between the patient and technologist is consistently accessible through an intercom system.
• Once the scan begins, your child will need to remain still at all times to make sure the pictures turn out clear. Depending on the scan, your child will be asked to hold his or her breath for a few seconds. The staff will then tell your child when to breathe out.
• Certain pictures for some MRI/MRA scans require a special liquid dye.
  • This liquid dye is called “contrast.” If your child has ever had a reaction to any contrast dye, or if he or she is allergic to iodine, please let your doctor know immediately.
  • The contrast will be given to your child by a nurse through an intravenous line, or IV, placed in a vein in your child’s hand, arm, or foot, depending on his or her age.
  • If your child is awake during the MRI/MRA, just after the contrast goes into the vein, he or she may feel a flush of warmth as well as a funny taste in the back of his or her mouth. The warm feeling and the funny taste are normal and will go away shortly.
  • When the scan is finished, the table will slide out of the scanner. Any monitoring equipment will be disconnected, and your child will be assisted of the table.
  • If your child received sedation medication for the scan, he or she will be moved to the recovery area after the scan and will stay there until the medication wears off. If an IV was placed for sedation, it will be taken out by a nurse in the recovery area once your child wakes up from the medication. The length of time it takes the medication to wear off will vary, as some children take longer than others to become alert. The minimum amount of time spent in recovery is one hour.
  • If your child was awake during the MRI/MRA and an IV was placed for contrast, it will be taken out by a nurse after the scan.

We welcome your help and support during this scan. One parent or guardian is invited to join your child in the exam room and scan room. Other adults and children must stay in the waiting area. If your child will be having sedation, you will be asked as the parent or legal guardian to sign a consent form before the sedation is given.

• The most important role of a parent or guardian during the scan is to help your child stay calm and relaxed. It is important that your child remain still during the MRI/MRA.
• The best way to help your child stay calm is for you to stay calm.
• Please follow the instructions of the nurse or MRI/MRA technologist. They will show you where to sit or stand during the scan.
• If an IV must be placed, you can help by reassuring and calming your child. Please tell the staff of ways that they might also help in keeping your child calm.
• Please do not distract the medical team or interrupt the scan in any way.
• We welcome your questions, but please ask them either before or after the scan.
• If your child is given sedation, please gather all belongings after the scan is finished so your child can be taken immediately to the recovery area.

A pediatric radiology doctor will look at and interpret the MRI/MRA scan, and a report of your child’s scan will be sent to the doctor who ordered it, usually within 48 hours. If the results are urgent, the referring doctor will be contacted immediately.

• Please contact the doctor who ordered the scan for the results.
• If your child did not receive sedation, then no special follow-up care for your child is necessary.
• If your child did receive sedation, please refer to the “Parent Information on Sedation” guide for follow-up care.

If your child has any special needs or health issues you feel the doctor performing the scan needs to know about, please call the Department of Pediatric Radiology at Children’s before the test and ask to speak with a nurse. It is important to notify us in advance about any special needs.

Preparing your child beforehand, as well as comforting your child during the test, will help your child have a more positive experience. Sometimes it is difficult to know how to explain tests to children. If you have any questions about ways to prepare or support your child, or if feel your child will have difficulty during the test, please call the Department of Pediatric Radiology at Children’s and ask to speak with the Child Life Specialist.