Patent ID: 8536865

Claim:
An apparatus for use in an MRI field to rotate an object relative to the MRI field comprising an MRI compatible electric motor, the MRI compatible electric motor comprising: a disc made of iron-free, magnetic and paramagnetic-free MRI compatible material; and a plurality of electromagnetic coils disposed radially on the disc, so that when an electric current is passed through each coil, an induced magnetic field interacts with the main static magnetic field exerting a tangential torque to produce a torque on the disc depending on the main static magnetic field, the number of the coils, the applied electric current and the size of the disc, wherein the motor is disposed at least in a portion of the MRI field to employ the MRI field at least in part as a magnetic field within the motor for generation of motive force, and wherein the MRI field is a main static magnetic field produced by a main magnet.