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W2805375422 abstract "MRI using nuclei other than protons is of clinical interest due to the important role of these nuclei in cellular processes. Phosphorous-31 ( 31 P), for example, plays an important role in energy metabolism. However, measurement of 31 P can be challenging, as the receive signal is weak compared with that of proton ( 1 H). Consequently, it is often necessary to integrate 1 H elements for localizations and B 0 shimming in RF coils intended for 31 P measurements. Good decoupling between the 1 H and the 31 P elements is therefore essential. In this paper, bent dipole antennas tuned to 1 H were integrated with a four channel 31 P loop coil array, in a manner providing strong geometric decoupling between dipoles and loops. As the physical length of a resonant dipole antenna is too long at 3T, the dipole antennas were bent around the load. The loss of 31 P elements due to the presence of the dipole antennas was evaluated by measuring scattering parameters and comparing the SNR of 31 P spectra with and without the presence of the dipole antennas. The performance of the bent dipole antenna was evaluated by simulation and sensitivity measurement. The Q-factors and the SNR of the four-loop array were reduced by less than 5% when the bent dipole antennas were introduced. The measured sensitivity of the bent dipole was higher (15%) than that of dual-tuned birdcage. The combined bent dipole and loop array is therefore a promising design for 1 H/ 31 P applications at 3T." @default.
W2805375422 created "2018-06-13" @default.
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W2805375422 date "2018-12-01" @default.
W2805375422 modified "2023-10-10" @default.
W2805375422 title "Design of a Quadrature 1H/31P Coil Using Bent Dipole Antenna and Four-Channel Loop at 3T MRI" @default.
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W2805375422 doi "https://doi.org/10.1109/tmi.2018.2844462" @default.
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