5 gauss line
Citation, DOI and article data
Vajuhudeen, Z., Sheikh, Y. 5 gauss line. Reference article, Radiopaedia.org. (accessed on 25 Jan 2022) https://doi.org/10.53347/rID-80049
The 5 gauss line is the safety line drawn around the perimeter of the main magnet of the MRI scanner, specifying the distance at which the stray magnetic field is equivalent to 5 gauss (0.5 mT).
Five gauss and below are considered 'safe' levels of static magnetic field exposure for the general public.
At 5 gauss and above:
cardiac pacemakers and other implanted electronic devices are at risk of being interfered with by the static magnetic field
ferromagnetic materials may become projectile (and are thus prohibited from crossing the 5 gauss line)
Note that the distance at which a 5 gauss line is drawn around a particular MRI scanner will depend on magnet strength and the level of magnetic shielding used.
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