Active shielding of cylindrical saddle-shaped coils: application to wire-wound RF coils for very low field NMR and MRI |
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| Authors: | Bidinosti C P Kravchuk I S Hayden M E |
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| Institution: | Department of Physics, Simon Fraser University, Burnaby, BC, Canada. cpbidino@sfu.ca |
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| Abstract: | 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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