Magnetic Resonance Imaging (MRI) is a non-invasive medical imaging technique that provides detailed pictures of organs and tissues inside the body. It uses a powerful magnetic field and radio waves to generate these images, differing from X-rays or CT scans which utilize ionizing radiation. Proper clothing is important for both patient safety and the clarity of the resulting images. The primary concern during an MRI scan involves the presence of metallic objects, which can interact with the strong magnetic field.
Understanding MRI Safety and Clothing
Clothing restrictions during an MRI stem from the powerful, always-active magnetic field produced by the scanner. This field can interact significantly with metallic objects, posing several risks. Ferromagnetic materials, like iron, nickel, and cobalt, can be strongly attracted to the magnet, potentially becoming dangerous projectiles that could cause injury or damage equipment. Even non-ferromagnetic metals such as aluminum or copper can heat up due to the radiofrequency pulses used during the scan, leading to thermal burns. Beyond physical safety, metal in or on clothing can distort the magnetic field, which in turn degrades image quality. This interference can make it difficult for radiologists to accurately interpret the scan results, potentially impacting diagnosis. Adherence to clothing guidelines ensures patient well-being and diagnostic accuracy. Facilities often require patients to remove problematic items to prevent hazards and image artifacts.
Selecting Your Attire for the MRI
Selecting appropriate clothing is important for a safe and successful MRI scan. Loose-fitting garments made from natural fibers are generally recommended. Materials like 100% cotton, linen, or bamboo are preferred because they lack metallic threads and are non-conductive. These fabrics also contribute to patient comfort during the scan, which can sometimes last for an extended period. Some modern athletic wear or “athleisure” clothing should be avoided, as they may contain metallic fibers for anti-odor, antimicrobial, or heat-retaining properties. These metallic threads can heat up during the scan and cause skin burns. Many MRI facilities provide patients with a hospital gown or scrubs, ensuring all clothing is metal-free and safe for the environment. Opting for the provided attire is the safest approach, especially if uncertain about personal clothing materials.
Personal Items and Accessories to Remove
Before an MRI scan, it is important to remove all personal items and accessories that contain metal to prevent safety issues and image interference. This includes:
All types of jewelry, such as rings, necklaces, earrings, bracelets, and watches, as these can heat up or be pulled by the strong magnetic field.
Body piercings, regardless of their location, as they can cause heating or movement during the scan.
Hair accessories like metal hairpins, clips, or barrettes, which must be taken out because they can become projectiles or cause image distortion.
Clothing items with metallic components, such as zippers, buttons, snaps, hooks, or metallic embellishments, should be avoided.
Underwire bras, which contain metal that can heat up or distort images.
Makeup and hair products that can contain metallic particles, particularly in mascara, eyeliner, and some glitter products, which can cause image artifacts.
Certain medical devices and patches, such as hearing aids, glucose monitors, insulin pumps, and transdermal patches (e.g., nicotine or pain patches), which must be disclosed and potentially removed or managed by staff.
All items from pockets, including credit cards, keys, coins, and electronic devices like cell phones, as these can be affected by the magnet or interfere with the scan.