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Low-frequency quadrature mode birdcage resonator

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Abstract

The birdcage resonator is frequently used in conventional MRI because of its excellent attributes. Its use in low-field MRI is restricted to field strengths higher than, for example, 0.1 T, dependent on the size of the coil. This is because of the intrinsically low inductance value of the birdcage coils. Furthermore, the sensitivity of the birdcage at low field strengths is significantly lower when compared to, for example, the solenoid. Both problems can be overcome with the multiturn technique and a novel wound birdcage coil. The quadrature mode wound birdcage coil presented in this paper can be used at frequencies as low as 100 kHz. Its sensitivity is also increased when compared to the conventional strip-ring birdcage. Homogeneity effective volume, and methods to increase the resonator bandwidth to match the signal bandwidth are left intact. The latter is a typical low-field problem.

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Authors and Affiliations

  1. Spin Imaging Group, Faculty of Applied Physics, Delft University of Technology, Postbus 5046, 2600 GA, Delft, The Netherlands, The Netherlands

    Henny M. Borsboom, Tatjana Claasen-Vujčić, Harry J. G. Gaykema & Toon Mehlkopf

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  1. Henny M. Borsboom
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  2. Tatjana Claasen-Vujčić
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  3. Harry J. G. Gaykema
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  4. Toon Mehlkopf
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Borsboom, H.M., Claasen-Vujčić, T., Gaykema, H.J.G. et al. Low-frequency quadrature mode birdcage resonator. MAGMA 5, 33–37 (1997). https://doi.org/10.1007/BF02592263

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  • DOI: https://doi.org/10.1007/BF02592263

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