Title :
Numerical analysis of eddy current problems involving z gradient coils in superconducting MRI magnets
Author :
Takahashi, Takao
Author_Institution :
Hitachi Ltd., Ibaraki, Japan
fDate :
3/1/1990 12:00:00 AM
Abstract :
The pulsive field of z gradient coils induces eddy currents in the cryostat walls of MRI (magnetic resonance imaging) superconducting magnets. These eddy currents are computed here by a network method and the effects of the eddy currents are investigated while varying the resistivity of the cryogenic radiation shield. Two paired z gradient coils are proposed to improve the efficiency and linearity of the z field gradient
Keywords :
biomedical NMR; coils; eddy currents; superconducting magnets; cryogenic radiation shield; cryostat walls; eddy currents; magnetic resonance imaging; network method; pulsive field; superconducting magnets; z gradient coils; Cryogenics; Eddy currents; Equations; Inductance; Magnetic resonance imaging; Magnetic shielding; Numerical analysis; Steel; Superconducting coils; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
