Combining the unparalleled soft-tissue imaging capabilities of MR imaging with the precision of robotic-assisted surgeries has the potential to revolutionize image-guided surgical interventions. However, strong magnetic fields generated by the MR system prevent the use of conventional robotic servo motor technologies. Here we present a direct current electromagnetic motor design that uses the electromagnetic interaction between the MR B0 field and currents in the rotor windings to generate rotational mechanical actuation. The motor stall torque and interactions caused by simultaneous motor operation and MR imaging are characterized. This new motor may be useful for robotic assisted interventions performed under MR-guidance.
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