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Abstract #4887

Why do dipole antennas work? A comparison to loop coils as a function of element size

Alexander Raaijmakers 1 , Peter R. Luijten 1 , and Cornelis A.T. van den Berg 2

1 Radiology, UMC Utrecht, Utrecht, Utrecht, Netherlands, 2 Radiotherapy, UMC Utrecht, Utrecht, Netherlands

More and more institutes have recognized the potential of dipole antennas. However, many coil engineers are still reluctant to adopt this new technology. This abstract will provide a meaningful insight into why dipoles can outperform more conventional coil array elements at ultra-high fields. A comparison to loop coils is performed by FDTD simulations at 300 MHz with varying dimensions. Results show that large dimensions are only beneficial at large depths. Dipole antennas outperform loop coils from a depth of only 5 cm. These results confirm again that dipole antennas form a promising candidate to improve ultra-high field imaging performance.

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