Hello flivrn,
You are correct that the electronic pump may malfunction if placed very close to the MRI scanner.
But we have never had issues with the MEDFUSION 3500 pumps in the MRI scanner room if placed outside of the 5 Gauss line this goes for both 1.5 T and 3 T scanners. We have not had a single case where the MEDFUSION 3500 has malfucntioned or given inaccurate readings or adversely effected the pump mechanism once placed at certain safe distance from the MRI bore area.
We use these pumps for Propofol infusion and not a single case have we had any issues while scanning the patient. You can place these pumps in a Copper or Aluminium shielded box and they work fine as well.
The only issue you might have when placing these close to the main bore area of the scanner is inducing noise interference into the MRI images. Otherwise if placed outside of the 5 Gauss Line you will not have any issues with non compatible MRI infusion pumps.
Thanks
Tim