Magnet Type The MRI magnet used at MCH is the superconducting type Superconducting magnets use a special wire which loses all resistance when cooled to 270 degrees Centigrade This requires liquid helium to surround the magnet wire Current is applied to the wire during instillation which gener ID: 605228
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Slide1
MRI SafetySlide2
Magnet Type
The MRI magnet used at MCH is the superconducting type. Superconducting magnets use a special wire which loses all resistance when cooled to -270 degrees Centigrade. This requires liquid helium to surround the magnet wire. Current is applied to the wire during instillation, which generates the magnetic field as it flows. Superconducting magnets are normally FULLY ENERGIZED at all times.Slide3
Magnetic Field
While MRI is considered to be a safe imaging technique, it is not without hazards. The magnet field will attract many ferromagnetic metals in an uncontrolled fashion and cause them to fly towards the magnets bore and turning them into high velocity projectiles. The bore of the magnet is where the fringe field is strongest, as all the lines of force are constricted and their relative strengths heightened. Various objects can be considered projectilesSlide4
Objects Considered to be ProjectilesSlide5
Magnetic Field Cont
…
The magnetic field extends outside of the poles of the magnet in all directions. It is always important to remember that the MRI magnet is the source of an invisible but powerful force, and this force grows considerably stronger as you come closer to the magnet.Slide6
When transporting patients to the MRI suite always use non-magnetic stretchers, oxygen bottles, IV poles, and wheelchairs. These devices are normally located at the MRI suite, if you have any questions regarding what can and cannot enter the MRI vault consult the technologist
Transporting Patients to MRISlide7
Entering a
Magnetic FieldBefore entering the magnetic field you should remove all personal effects. The characteristics of the magnet field will harm digital and analog watches, magnetized strip on credit cards, pagers, radios, and some car alarm activators. Slide8
Precautions if Staying Inside the MRI Vault
Use auditory protection
If you have…
Pacemaker
Aneurysm ClipsMetal Orthopedic prosthesis Ocular ImplantsDental Implants
Heart Valve Prosthesis
Intravascular Stents
Permanent Eyeliner Tattoos
Shrapnel Wounds
History of welder or machinist
ALERT
the Technologist BEFORE Entering the Magnetic FieldSlide9
BE ALERT!!!!
Do not become a victim to the adverse effects of the magnet field, an incident can occur when you least expect it due to inattention.