Mode-Weighting in Metasurface Designs for MRI Signal Enhancement
Motivation: Resonators based on metamaterials (metasurfaces) can improve the imaging properties of the integrated MRI scanner coils. Goal(s): The goal was to modify the resonance frequency of the metamaterial towards the Larmor frequency (mode-weighting) in order to achieve a higher SNR with these mode-weighted metasurfaces. Approach: Simulations and MRI measurements of the mode-weighted metasurface were performed on a phantom to evaluate |B1-| maps, SNR maps and transmit decoupling. Results: The mode-weighting caused an increase in simulated |B1-| maps of up to 20.1 % and for the measured SNR maps by 6 %. If the mode-weighting is too high the transmission decoupling progressively becomes worse. Impact: It is possible to improve the reception sensitivity of metasurfaces coupled to the integrated spine coil by mode-weighting and thus optimize quasi cable-free MR imaging.
Authors
- Daniel Düx (ORCID: https://orcid.org/0000-0003-3978-4458)
- Max Joris Hubmann
- Robert Kowal (ORCID: https://orcid.org/0000-0002-9842-3700)
- Holger Maune (ORCID: https://orcid.org/0000-0002-2216-4319)
- Oliver Speck (ORCID: https://orcid.org/0000-0002-6019-5597)
- Bennet Hensen (ORCID: https://orcid.org/0000-0001-6966-273X)
- Frank K. Wacker (ORCID: https://orcid.org/0000-0002-6285-8403)
- Marcel Gutberlet (ORCID: https://orcid.org/0000-0002-6164-8973)
- Lucas Knull (ORCID: https://orcid.org/0009-0008-9622-8320)
Publication Details
- Journal
- Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition
- Published
- 2025-09-16
- DOI
- https://doi.org/10.58530/2025/3467
- Primary Topic
- Metamaterials and Metasurfaces Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00