Passive Shimming of MRI Magnets with B0 >= 3T at Reduced Field

Keywords

accuracy achieve adequate albeit allow allows although altogether amount applied assembly assistance becomes blow capacity characterizing china coarse coil compensate complicated components contribution costly cover cryostat dedicated defined depends designs developed differ division done drastically either eliminates employ employed enable energized examples extraction fact factory field final fine flow forces full function history homogeneity illustrated implementing individual inevitably inhomogeneities inserted insertion installation iteration iterations linear loads magnet magnets manufacturing maps margin mass material mechanical moment mounted need needed next novel operating partial partially passive people percentage perfect performance pieces placed positions potential prediction prescribed procedure process processes properties proposed proved quenches ramped ramps reduced reducing reliable remaining required requirement room safe sample saturation scanners scheme several shield shim shimmed shimming shims site special stage steel step steps structural subsequent substantially successfully sufficient summarized summary table taken technologies terms thereafter timothy tools torque torques training transfer tray trays usually variations varies virgin