Cape Town - 2026 ISMRM-ISMRT Annual Meeting and Exhibition
9 May 2026 – 14 May 2026
· Cape Town, South Africa
631-01-011 / 631-01-011
ISMRM Abstract
Exploiting the microwave regime with transmission lines: High-impedance dipoles and Marchand baluns for 11.7T brain MRI
Primary:
Physics & Engineering - RF Arrays & Systems
Secondary:
Physics & Engineering - High-Field MRI
631-01-011 · RF Coils
· Thursday, 14 May, 8:30 AM–10:06 AM · Roof Terrace
631-01-011 · RF Coils
· Thursday, 14 May, 8:30 AM–10:06 AM · Roof Terrace
Keywords:Radiofrequency CoilsTransmit arraysUltra high field MRIParallel radiofrequency transmissionHigh-impedance dipole
Accepted
Paul-François Gapais 1, Michel Luong2, Eric Giacomini1, Franck Mauconduit1, Vincent Gras1, Alexis S Amadon1
1University of Paris-Saclay, CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette, France
2BAOBAB, University of Paris-Saclay, CEA, IRFU, DACM, France
Presenting Author: Paul-François Gapais
Synopsis
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1. Meneses BP, Stockmann JP, Arango N, et al. Shim coils tailored for correcting B0 inhomogeneity in the human brain (SCOTCH): Design methodology and 48-channel prototype assessment in 7-Tesla MRI, Neuroimage 2022. DOI: https://doi.org/10.1016/j.neuroimage.2022.119498. [doi]
2. Gapais P-F, Luong M, and Amadon A. Finding the optimal 8-TxRx array for a tight shielded brain coil at 11.7T: a simulation study. Proc. Intl. Soc. Mag. Reson. Med. 33 (2025). P. 3325. DOI: https://doi.org/10.58530/2025/3325 [doi]
3. Zhang B, Sodickson DK, Cloos M, A high-impedance detector-array glove for magnetic resonance imaging of the hand. Nat Biomed Eng. 2018. DOI: https://doi.org/10.1038/s41551-018-0233-y. [doi]
4. Marchand N, Transmission Line Conversion Transformers, Electronics, Vol 17, December 1944, pp. 142-145.
5. Amadon A, Cloos MA, Boulant N, et al. Validation of a very fast B1-mapping sequence for parallel transmission on a human brain at 7T. Proc. Intl. Soc. Mag. Reson. Med. 20 (2012), p. 3358.
6. Boulant N, Gras V, Amadon A, Luong M, Ferrand G, and Vignaud A. Workflow proposal for defining SAR safety margins in parallel transmission. Proc. Intl. Soc. Mag. Reson. Med. 26 (2018), p. 0295.
7. Eichfelder, Gabriele, et Matthias Gebhardt. « Local Specific Absorption Rate Control for Parallel Transmission by Virtual Observation Points ». Magn Reson Med. 2011. DOI: https://doi.org/10.1002/mrm.22927. [doi]
8. Gras V, Boulant N, Luong M, Morel L, Le Touz N, Adam JP, Joly JC. A mathematical analysis of clustering-free local SAR compression algorithms for MRI safety in parallel transmission, IEEE Trans Med Imaging 2023. DOI: https://doi.org/10.1109/TMI.2023.3319017. [doi]
9. Cloos MA, Boulant N, Luong M, et al. kT -points: short three-dimensional tailored RF pulses for flip-angle homogenization over an extended volume. Magn Reson Med. 2012. DOI: https://10.1002/mrm.22978.
10. Bregeat J, Mauconduit F, Boulant N, and Gras V. Efficient simultaneous optimization of k-space trajectories and parallel transmission RF waveforms using the parametric 'fastGRAPE' approach. ESMRMB 2024. Abstract 0420.
11. Boulant N, Mauconduit F, Gras V, et al. In vivo imaging of the human brain with the Iseult 11.7-T MRI scanner. Nat Methods 21, 2013–2016 (2024). DOI: : https://doi.org/10.1038/s41592-024-02472-7 [doi]
12. Luong M, Ferrand G, Chazel E, et al. A Compact 16Tx-32Rx Geometrically Decoupled Phased Array for 11.7T MRI. Proc. Intl. Soc. Mag. Reson. Med. 30 (2022), p. 0707 DOI: https://doi.org/10.58530/2022/0707 [doi]
13. Gapais PF, Luong M, Giacomini E, et al. A 32-channel high-impedance honeycomb-shaped receive array for temporal lobes exploration at 11.7T. Magn Reson Med. 2024. DOI: https://doi.org/10.1002/mrm.30274. [doi]