Did You Know? Everyday Items That Can Affect Your MRI
Magnetic resonance imaging (MRI) is one of the most advanced and detailed imaging tools available today. It does not use radiation. Instead, it relies on a powerful magnetic field to produce highly detailed images of the body.
Because MRI uses a strong magnet, certain everyday items and medical devices may not be safe in the MRI environment. Many patients are surprised to learn what needs to be removed or discussed before an exam.
The good news is that most concerns can be addressed easily with proper planning and communication.
Clothing and Activewear
Did you know some athletic wear may contain hidden metal fibers?
Certain leggings, sports bras and compression garments have been found to contain metallic threads woven into the fabric. In July 2024, Radiology Business reported on concerns raised by an imaging physician who warned that some popular athletic apparel brands may include metallic fibers that are not visible to the wearer but could interact with the MRI magnet.
While not all athletic clothing contains metal, patients are often asked to change into a gown to ensure safety and prevent image distortion.
When in doubt, simple clothing without metallic fibers, zippers or decorative elements is best.
Nail Polish and Cosmetics
Some specialty nail polishes, including magnetic or “cat eye” polish, may contain tiny metallic particles. Certain cosmetics, including some eyeliners and eyeshadows, may also contain trace metals.
In most cases, these products do not pose a safety risk. However, they can occasionally cause image distortion, particularly during scans of the head or hands.
If you are scheduled for an MRI of the brain or upper extremities, your care team may provide specific instructions regarding cosmetics or nail products.
Hair Accessories and Personal Items
Hairpins, wigs with metal clips, hearing aids, body piercings and removable dental appliances must be removed before entering the MRI suite. Even small metal objects can become safety hazards in a magnetic field.
If you are unsure whether something contains metal, bring it to your appointment and ask your technologist.
Medical Devices
When you schedule your MRI and again when you arrive for your appointment, please inform your MRI technologist about any implanted medical devices, metal or prostheses you may have. Examples include:
- Pacemakers
- Aneurysm clips
- Neurostimulators
- Cochlear implants
- Infusion pumps
- Artificial joints
- Metal fragments
- Surgical hardware
Some implants are not safe for MRI. Even devices labeled MRI compatible may require specific scan settings, documentation review or additional safety checks.
Sharing this information in advance allows our team to review the details before your appointment and confirm that your exam can be performed safely. If implants are disclosed only at arrival, additional review may be required and, in some cases, the exam may need to be rescheduled.
If you have an implant identification card or documentation, please bring it with you. Our team will review the information and guide you through the next steps.
What If You Realize at the Last Minute?
If you realize shortly before your appointment that you have metal you cannot remove, do not panic.
Inform the MRI staff immediately. In many cases, the team can evaluate the item and determine whether the exam can proceed safely. If additional review is required, the appointment may need to be rescheduled to ensure your safety.
If you have questions before your appointment, contact our team. We are happy to review any concerns in advance so you can feel confident and prepared on the day of your exam.
Our priority is always your safety and the quality of your imaging.