Check whether body jewelry is MR Safe, Conditional, or Unsafe before an MRI. 17 materials classified under ASTM F2503, BioFlex®, titanium, steel.
"I get asked about MRI safety more than almost any other subject. When a patient with a tongue or navel piercing needs an urgent scan, the radiographer's default answer is 'remove it.' With BioFlex®, I've always said: you don't need to. It's the only body jewelry I know of that a radiographer can accept with zero hesitation, no ferromagnetism, no heating, no artifact. This checker makes that case clearly, and covers every other material so patients and practitioners can make informed decisions fast."
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</iframe>It depends entirely on the material. Body jewelry classified as MR Safe, such as BioFlex® medical-grade polymer or PTFE, can be left in place during an MRI scan with no known hazards. MR Conditional materials like implant-grade titanium (ASTM F136) are generally accepted by radiographers, subject to field strength limits (typically ≤ 3T). MR Unsafe materials, ferromagnetic steel, magnetic clasps, silver, or unknown-grade "surgical steel", must be removed before entering the MRI suite. The risk is not just artifact: ferromagnetic materials can experience significant force displacement in a high-field magnet, and conducting loops can cause RF heating and burns.
BioFlex® medical-grade polymer is the gold standard for MRI-safe body jewelry. Manufactured by Poli International, BioFlex® is a polypropylene random copolymer (PP-R) with ISO 10993-6 biocompatibility certification and FDA Class IV classification. It is non-ferromagnetic, non-conductive, generates no RF heating, and produces no susceptibility artifact in MRI images. When a patient needs a retainer during a scan, BioFlex® is the only material a radiographer can clear without qualification. PTFE (Teflon) and nylon retainers are also MR Safe, though they lack the biocompatibility certification of BioFlex®.
ASTM F2503 is the Standard Practice for Marking Medical Devices and Other Items for Safety in the Magnetic Resonance Environment. It defines three classifications: MR Safe (no known hazards in any MR environment), MR Conditional (no known hazards under specified conditions of field strength, SAR, and scan duration), and MR Unsafe (known hazards, do not use in MR environment). These classifications were developed for implanted medical devices, but the same physics applies to body jewelry. Radiographers rely on ASTM F2503 terminology when making admit/remove decisions at the scanner door. Jewelry manufacturers that understand and can reference this standard provide the clinical evidence chain needed in a healthcare setting.
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