Highly homogeneous circularly polarized RF field for whole body NMR imaging.
Conditions for generation of polarized RF fields in cylindrical symmetry by high order coils are presented. Whole body NMR transmitters utilizing this principle would require a current control on a certain number of loops. In the present design this is obtained by feeding each loop by an appropriate linear combination of two in quadrature waves. The development has been experimentally tested by three scaled down experimental prototypes operated at 500 kHz and a good agreement has been found.
Sotgiu
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Dipartimento di Scienze e Tecnologie Biomediche e Biometria, Universita' dell'Aquila, Italy.
Gualtieri
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Passariello
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D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods; D011846:Radio Waves