<p>The invention relates to a magnet assembly for an MRI system with an improved RF screen. The RF screen is located between an RF coil assembly and a gradient coil assembly and comprises multiple layers of a screening foil. The screening foil comprises a dielectric foil and a plurality of conductive patches which are applied to a first side of the dielectric foil. By wrapping up the screening foil several times an RF screen comprising a plurality of capacitors is created, which effectively shields RF radiation from the gradient coil assembly. Further the shape and arrangement of the conductive patches is chosen such that the flow of eddy currents in the conductive patches caused by a gradient magnetic field is reduced.</p>
申请公布号
WO2014195277(A1)
申请公布日期
2014.12.11
申请号
WO2014EP61418
申请日期
2014.06.03
申请人
KONINKLIJKE PHILIPS N.V.;PHILIPS GMBH
发明人
FORTHMANN, PETER;WUELBERN, JAN HENDRIK;VERNICKEL, PETER;FINDEKLEE, CHRISTIAN