Title :
Eddy current effects in MRI superconducting magnets
Author :
Badea, Eugene A. ; Craiu, Ovidiu
Author_Institution :
BSG Inc., Sugerland, TX, USA
fDate :
3/1/1997 12:00:00 AM
Abstract :
Magnetic resonance imaging (MRI), as well as some volume selected spectroscopy methods, use pulsed magnetic field gradients which induce multi-exponentially decaying eddy currents in all nonlaminated conductive parts of the superconducting magnets. This paper presents the analysis of the z gradient field distorsion due to the induced eddy currents and the corresponding correction in a 4 T/30 cm bore superferric self-shielded magnet
Keywords :
NMR imaging; eddy currents; superconducting magnets; 4 T; MRI superconducting magnets; NMR; eddy current effects; magnetic resonance imaging; multi-exponentially decaying eddy currents; nonlaminated conductive parts; pulsed magnetic field gradients; superferric self-shielded magnet; volume selected spectroscopy methods; z gradient field distorsion; Boring; Degradation; Eddy currents; Iron; Magnetic resonance imaging; Magnetic separation; Radio frequency; Solenoids; Superconducting coils; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
