DocumentCode
1019530
Title
Numerical analysis of eddy current problems involving z gradient coils in superconducting MRI magnets
Author
Takahashi, Takao
Author_Institution
Hitachi Ltd., Ibaraki, Japan
Volume
26
Issue
2
fYear
1990
fDate
3/1/1990 12:00:00 AM
Firstpage
893
Lastpage
896
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;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.106461
Filename
106461
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