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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