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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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Published in: | Journal of magnetic resonance (1997) 2005-11, Vol.177 (1), p.31-43 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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. |
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ISSN: | 1090-7807 1096-0856 |
DOI: | 10.1016/j.jmr.2005.07.003 |