GE OPTIMA MR360 Service Training page 10

Be sure to be cautious when installing or replacing anything in the magnet
room, especially in the 3.0T environment. Test items first for ferrous properties.
Never put your body between the magnet and anything that may be a ferrous
material.
The 3T magnetic field requires extreme caution. Be alert for ferrous materials
when performing replacement procedures in the scan room. Note that on 3T
systems, even non-ferrous tools are slightly ferrous! Follow all service
documentation procedures.
The System Pre-Installation manual shows magnetic field strengths at
different distances from the magnet
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