A shielded power coupling device configured to transfer electric power between a stator and a rotor of a radiation imaging system, comprising: an inductive field generating element configured to convert electric power to an inductive coupling field; an inductive field receiving element configured to convert the inductive coupling field to electric power; a primary and secondary core (510, 516; 810) separated by a core airgap, and a shell (512, 518; 812) the shell comprising: a fringe field mitigation element (520; 820) forming a substantially continuous electrical path which constitutes a closed electrical circuit and configured to substantially cancel magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core and the secondary core near the core airgap, and a non-fringe field mitigation element not capable of sustaining a current, the non-fringe field mitigation element being comprised of a plurality of segments, the segments coupled together to form a substantially circular structure characterized by: the fringe field mitigation element comprising an electrically conductive wire that is inserted into the non-fringe field mitigation element once the segments are coupled together. an inductive field generating element configured to convert electric power to an inductive coupling field; an inductive field receiving element configured to convert the inductive coupling field to electric power; a primary and secondary core (510, 516; 810) separated by a core airgap, and a shell (512, 518; 812) the shell comprising: a fringe field mitigation element (520; 820) forming a substantially continuous electrical path which constitutes a closed electrical circuit and configured to substantially cancel magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core and the secondary core near the core airgap, and a non-fringe field mitigation element not capable of sustaining a current, the non-fringe field mitigation element being comprised of a plurality of segments, the segments coupled together to form a substantially circular structure characterized by: the fringe field mitigation element comprising an electrically conductive wire that is inserted into the non-fringe field mitigation element once the segments are coupled together. a fringe field mitigation element (520; 820) forming a substantially continuous electrical path which constitutes a closed electrical circuit and configured to substantially cancel magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core and the secondary core near the core airgap, and a non-fringe field mitigation element not capable of sustaining a current, the non-fringe field mitigation element being comprised of a plurality of segments, the segments coupled together to form a substantially circular structure characterized by: the fringe field mitigation element comprising an electrically conductive wire that is inserted into the non-fringe field mitigation element once the segments are coupled together.