Why MRI and metal interact
MRI scanners generate magnetic fields of 1.5–3 Tesla 30,000 to 60,000 times Earth's magnetic field. Ferromagnetic metals (attracted to magnets: iron, nickel, cobalt alloys) experience significant force and heating inside this field. The relevant question is simply: is your jewellery ferromagnetic?
Materials and MRI safety
| Material | MRI safety | Notes |
|---|---|---|
| Implant-grade titanium ASTM F136 | ✅ MRI-safe | Non-ferromagnetic. Same as surgical implants. Removal generally not required. |
| Niobium | ✅ MRI-safe | Non-ferromagnetic. |
| Solid 14k / 18k gold (nickel-free) | ✅ MRI-safe | Non-ferromagnetic. |
| Implant-grade steel ASTM F138 | ⚠️ Generally safe — confirm | Very low ferromagnetic content. Confirm with radiologist. |
| Sterling silver | ⚠️ Confirm with radiologist | Generally safe but conductivity creates heating risk at some frequencies. |
| 316L surgical steel unverified | ⚠️ Confirm with radiologist | Variable alloy content may be ferromagnetic. |
| Unknown metal / fashion jewellery | ❌ Remove | Cannot be assumed safe. |
| Magnetic closures or magnetic balls | ❌ Remove | Explicitly contraindicated. |
If you cannot remove a piercing
1. Tell the radiologist before the scan — never conceal a piercing from MRI staff.
1. If the material is confirmed non-ferromagnetic (implant-grade titanium, niobium), the radiologist can often proceed.
2. If the material is unknown, a ferromagnetic detection device can be used to screen it.
3. If the piercing is in the direct scan area and cannot be confirmed safe, the scan may need to be rescheduled.
Internal links
• Piercing by lifestyle: complete guide
• Titanium piercings: why implant-grade matters
Frequently Asked Questions
Can I have an MRI with a titanium piercing?
Yes. Implant-grade titanium ASTM F136 is non-ferromagnetic and classified MRI-safe in all standard clinical settings. The same material is used in surgical bone screws and spinal implants. Always inform the radiologist, but removal is generally not required for confirmed titanium jewellery.
Do I need to remove my piercing before an MRI?
It depends on the material. Implant-grade titanium and niobium are MRI-safe and usually do not need to be removed. Unknown metals, fashion jewellery, and jewellery with magnetic components must be removed. Always declare all piercings to the radiologist before the scan.
What happens if I forget to remove a metal piercing before an MRI?
The scan will not proceed if unsafe metal is detected. Modern scanners and pre-scan screening protocols are designed to catch this. Always declare in advance it avoids delays and ensures safety.
Is a gold piercing safe for MRI?
Solid gold (14k or 18k, nickel-free) is non-ferromagnetic and generally MRI-safe. Confirm the alloy composition with your jeweller and declare it to the radiologist. Gold-plated jewellery over unknown base metals is not assumed safe.
Can a piercing cause burns during an MRI?
Ferromagnetic and highly conductive metals can heat from induced eddy currents. Implant-grade titanium has very low conductivity and does not heat significantly. Sterling silver and some steel alloys can produce localised heating one reason all jewellery must be declared and assessed before scanning.