Object ID: 00000018WIA30492870GYZ
Topic ID: id_40025195 Version: 1.3
Date: Nov 17, 2021 11:44:15 AM

Conductive material heating

Another potential hazard related to the RF field is the heating of implants, devices, and objects of conductive (e.g. metallic) compositions that may cause temperature changes during an MR examination. The induced currents in the conductive (e.g. metallic) objects may cause them to get so hot that they can actually cause burns in adjacent tissues. Therefore, it is very important to determine each patient’s work history and thoroughly screen for any accessories containing conductive material.

Observe the following warnings concerning conductive material heating to protect patients from excessive heating or burns related to induced currents during MR procedures:

Warning

Eye makeup that contains metal flakes can cause eye and skin irritation during MR scanning. Instruct patients to wash off removable makeup before the exam to avoid the risk of eye injury. Before scanning, warn patients with permanent eyeliner or other metallic ink tattoos about the risk of skin irritation and instruct them to get prompt medical attention if they experience severe discomfort following an MR exam.

Warning

Metal fragments/slivers can deflect and/or heat in a magnetic field, damaging surrounding tissues. Patients thought to have metallic fragments in the eye should receive an eye exam to detect and remove any metal fragments that could deflect and damage the eye.

Warning

Jewelry, even 14-karat gold, can heat and cause burns. RF can heat (even non-ferrous) metal and cause burns. Clothing containing metallic thread or components and all other metallic objects such as watches, coins, etc., must be removed from the patient.

Warning

Medicinal products in transdermal patches may cause burns to underlying skin.

Warning

The use of MR Unsafe or MR Conditional (used outside of its conditions for use) stereotactic frames and RF blankets is not recommended.