September 17, 2025

Evaluation of the coax monopole antenna as a transmit array element for head imaging at 14T

Puntos clave

The coax monopole antenna shows similar B1+ and SAR efficiency as the fractionated dipole, marking it as a viable option.
FDTD simulations were conducted on a human model to assess B1+ and SAR distributions, providing critical performance insights.
Lower reflection and coupling rates of the coax monopole suggest improved performance in transmit head coil arrays at 14T MRI.
Its single-ended design simplifies cable routing in spatially constrained environments, enhancing practical application.

Resumen

Motivation: The recently introduced coax monopole antenna could be a suitable head coil array element for the 14T MRI system, which is being developed for installation in Nijmegen, the Netherlands. Goal(s): Evaluate the performance of the coax monopole antenna at 600MHz and compare the fractionated dipole. Approach: Eight-channel FDTD simulations were performed on human model Duke to evaluate B1+ and SAR distributions. Prototypes were built for S-parameter evaluation. Results: The coax monopole and fractionated dipole perform similar in terms of B1+ and SAR efficiency. The coax monopole has lower reflection and coupling. Impact: The coax monopole antenna would be an excellent candidate for transmit head coil arrays at 14T MRI, due to its high SAR efficiency and low coupling. Additionally, its single-ended design facilitates cable routing, particularly in a spatially restricted environment.

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Cite This Study

Budé et al. (Tue,) studied this question.

synapsesocial.com/papers/68d45b1b31b076d99fa5d490 https://doi.org/https://doi.org/10.58530/2025/4388

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