Integrated MRI gradient coil and RF screen

摘要: The magnetic field assembly of a resonance imaging device includes an annular superconducting magnet (10) which is mounted within toroidal vacuum vessel (24). A cylindrical member (26) defines central bore through the magnets generate temporally constant primary field. cylindrical, dielectric former (46) in displaced small distance from member. radio frequency coil (32) defining patient receiving examination region. An RF shield (34) around exterior peripheral surface former. Primary gradient coils (40) are and potted to shield. Gradient or secondary (44) chamber. As illustrated FIG. 3 , when unshielded used, outer diameter (26).