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Active shielding of cylindrical saddle-shaped coils: Application to wire-wound RF coils for very low field NMR and MRI

We provide an exact expression for the magnetic field produced by cylindrical saddle-shaped coils and their ideal shield currents in the low-frequency limit. The stream function associated with the shield surface current is also determined. The results of the analysis are useful for the design of ac...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 2005-11, Vol.177 (1), p.31-43
Main Authors: Bidinosti, C.P., Kravchuk, I.S., Hayden, M.E.
Format: Article
Language:English
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Summary:We provide an exact expression for the magnetic field produced by cylindrical saddle-shaped coils and their ideal shield currents in the low-frequency limit. The stream function associated with the shield surface current is also determined. The results of the analysis are useful for the design of actively shielded radio-frequency (RF) coils. Examples pertinent to very low field nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) are presented and discussed.
ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2005.07.003