Ferromagnetic objects

Ferromagnetic objects brought within close proximity of the static magnetic field can become projectiles, which could cause harm to someone standing between the object and the magnet. The force of attraction between a magnet and a ferromagnetic object is determined by the magnetic field strength (fringe field), the magnetic susceptibility of the object, its mass, its distance from the magnet, and its orientation to the field.

Use only non-ferrous oxygen tanks, wheelchairs, gurneys, intravenous (IV) poles, ventilators, etc. in the magnet room. Be sure anyone who has access to the MR suite is aware that only non-ferrous items are allowed in the magnet room. Make them aware that policies and procedures are in place for bringing medical devices and other equipment into the magnet room.

In addition to the projectile hazard, the static magnetic field can cause ferromagnetic objects within the patient (e.g., surgical clips, prostheses) to move, thus possibly causing harm. Electrically, magnetically, or mechanically activated implants can become dysfunctional due to the static magnetic field. If these devices are life-supporting, harm could result. For medical devices that are labeled as MR Safe or MR Conditional consult the device manufacturer's documentation.