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Abstract #4798

Helix antennas: approaching the target from a different angle

Alexander J.E. Raaijmakers 1 , Abe van der Werf 2 , Hugo Kroeze 1 , Peter R. Luijten 1 , Cornelis A.T. van den Berg 3 , and Dennis W.J. Klomp 1

1 Radiology, UMC Utrecht, Utrecht, Utrecht, Netherlands, 2 Machnet B.V., Roden, Netherlands, 3 Radiotherapy, UMC Utrecht, Utrecht, Netherlands

Helix antennas are a commonly used type of antenna in communication technology. They emit a circularly polarized wave with high directivity. For MRI, the helix antenna has the unique property to transmit or receive along the longitudinal axis of the scanner. This unique property enables the coverage of regions that are otherwise hard to address, particularly at higher field strengths. For example, the helix antenna can be used to recover B1 at the apex of the head. For prostate imaging, the helix antenna can be used to increase sensitivity by placing the coil between the legs, along the longitudinal axis.

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