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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