MRI Safety Information for Participants

Overview: Why MRI Safety Matters

MRI is a very safe imaging procedure as long as the correct preparations are taken. The MRI scanner uses a powerful magnet (over 60,000 times stronger than Earth’s magnetic field!), which means metal objects can pose safety risks.

At CFMI, we take MRI safety extremely seriously, and we ask our researchers and our research participants do the same.

Prior to scanning, you will fill out an MRI safety screener which will be reviewed with you twice. Please answer honestly and completely, even if you’ve had prior MRIs or have been told something is “MRI safe”. We want the most complete picture of your relevant medical history to ensure your safety.

Have an implant?

Let your research team know as soon as possible. Every implant (whether surgical, cosmetic, or otherwise) needs to be known. You may be asked to contact your doctor or surgeon for more information.

Guidelines: What Not to Wear

To avoid safety risks or burns, do not wear clothing with:

  • Zippers, grommets, or metal snaps (especially on jackets, hoodies, or sweatshirts)
  • Metallic, glitter, or sequin fabrics
  • “Antimicrobial” athletic wear, which often contains metallic thread
  • Metallic makeup or skincare products, including heavy eyeliner, mascara, or eyeshadow

You will also need to remove:

  • Wigs, hair pieces, hair clips, pins, and magnetic fasteners
  • All jewelry: earrings, other piercings, bracelets, watches, and wedding rings
  • Shoes
  • Belts, chains, and any other metal accessories
  • Anything in your pockets: phones, keys, wallets, credit cards, etc.
  • Medical devices: Hearing aids, pumps, monitors, orthotics, braces, dentures, and partial plates
  • Permanent dental work does not usually pose an issue, but please inform your researcher coordinator ahead of time so that they can confirm.

Common Side Effects from the MRI Environment

Most participants feel perfectly fine in the scanner, but a few minor sensations are normal:

  • Dizziness or Vertigo (lasting 30-60 seconds) when entering the scanner
    • This is caused by the magnet’s effect on the fluid in your inner ears.
    • Inform your technician if this occurs. They can slow the movement of the bed when you exit the scanner.
  • Peripheral Nerve Stimulation (PNS)
    • This can feel like a light tingling sensation across your face and/or limbs.
    • This is harmless and temporary, but if is uncomfortable, squeeze the emergency ball and your technician will stop the scan immediately.