As you are well-aware, any magnetic metal — iron, steel, etc. — showing up in the MRI (magnetic resonance imaging) room will be drawn into the heavily magnetized exam machine with disastrous results that can include personal injury and as well as expensive equipment damage.
Before the machine was first turned on, the floor should have been finished with several coats of a quality product. Since you can''t use a rotary or any other motorized floor machine in the room after the unit is energized, you will have to rely on dust and damp mopping for daily maintenance.
You probably already have non-metallic handles for this, and while the machine is activated, you will be forced to do ... — Lynn E. Krafft
, ICAN/ATEX editor