5-Gauss Line
Boundary around an MRI magnet where fringe field drops below 5 Gauss. Ferromagnetic objects within the line are at risk of becoming projectiles.
Siting
- 1.5 T Symphony: typically 8-12 ft from magnet center
- 3 T Prisma / Skyra: larger
- Shielded magnets reduce the 5-gauss footprint substantially
Control
- Physical barrier at boundary
- Signage / floor markings
- Ferromagnetic detection at door (modern installs)