A novel approach to the design of gradient coils for MRI is introduced
which takes into account from the start the effects of induced E-fields
and hence currents in a patient subjected to time dependent magnetic
field gradients. The approach has led to conceptually novel designs of
gradient coils which comprise distributions of electrodes or tessellae
placed around the basic coil structure. When properly energised the
electrode arrays are able, in the simplest case, to reduce the maximum
E-field experienced by the patient by approximately a factor of three
over that experienced with a standard fingerprint or distributed
transverse gradient coil, the comparison being done for the same gradient
strength, same coil diameter and same ROI.