Grounded RF shield for an MRI system

摘要

An eddy current induced in an RF shield (106) by an X-axis gradient coil, a Y-axis gradient coil, and a Z-axis gradient coil (GC)respectively is homogeneously released to an earth ground (gp) simultaneously with induction. An RF shield is connected to a magnet (Mb)via capacitors (1b,3b) at four points whose angles are different from one another by 90 DEG . The magnet is connected to the earth ground (gp). An eddy current induced in the RF shield can be prevented from degrading MRI image quality.