Search common devices to check their MRI compatibility status.
Note: Always verify with manufacturer guidelines for specific models.
| Device / Object | Status | Key Considerations |
|---|
Zone I: General Public
Access: Unrestricted.
Areas outside the MRI environment (e.g., waiting room, reception). No magnetic field hazard.
Zone II: Unscreened Patients
Access: Supervised.
Interface between public and strict MRI areas. Patient screening, history taking, and gowning occur here.
Zone III: Restricted Area
Access: Strictly Controlled.
Region where the fringe field hazard begins. Danger: Missile effect risk. Only screened personnel/patients allowed.
Zone IV: Magnet Room
Access: Forbidden to Unscreened.
The scanner room itself. High Danger: Always-on magnetic field. Risk of projectile effect, burns, and device malfunction.
Projectile (Missile) Effect
Ferromagnetic objects (oxygen tanks, keys, scissors) act as high-velocity projectiles near the magnet.
RF Heating & Burns
Radiofrequency (RF) energy can heat conductive materials (tattoos, wires, ECG leads) causing burns.
The Quench (Helium Vent)
Emergency shut-down of the magnetic field. Liquid helium boils off, displacing oxygen.
Code Blue (Cardiac Arrest) in Zone IV
- DO NOT bring the crash cart/defibrillator into Zone IV (Magnet Room).
- IMMEDIATELY remove the patient from Zone IV to Zone III or II.
- Initiate CPR/Resuscitation once safely outside the 5 Gauss line.
- Close the Zone IV door to prevent unauthorized entry during chaos.
Pregnancy & Contrast (Gadolinium)
- Pregnancy: MRI is generally considered safe, but risk/benefit analysis is required (especially 1st trimester). No Gadolinium unless absolutely vital (crosses placenta).
- NSF (Nephrogenic Systemic Fibrosis): Risk in patients with severe renal failure (GFR < 30). Screen renal function before Gadolinium administration.