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Conference papers
Enhancement of transmit and receive efficiencies with hybridized meta-atom in 7T head coil
Marc Dubois
1, 2
Lisa Leroi
3
Zo Raolison
3
Redha Abdeddaim
2
Tryfon Antonakakis
4
Julien de Rosny
5
Alexandre Vignaud
3
Pierre Sabouroux
2
Elodie Georget
3
Benoît Larrat
3
Gérard Tayeb
2
Nicolas Bonod
2
Alexis Amadon
3
Franck Mauconduit
3
Cyril Poupon
3
Denis Le Bihan
3
Stefan Enoch
2
Marc Dubois 1, 2
Author IdHAL : dubois-marc
Lisa Leroi 3
Author
Zo Raolison 3
Author
Redha Abdeddaim 2
Author
Tryfon Antonakakis 4
Author
Julien de Rosny 5
Author IdHAL : julien-de-rosny
Alexandre Vignaud 3
Author
Pierre Sabouroux 2
Author
Elodie Georget 3
Author
Benoît Larrat 3
Author
Gérard Tayeb 2
Author IdHAL : gerard-tayeb ORCID : https://orcid.org/0000-0002-0235-1010
Nicolas Bonod 2
Author IdHAL : nicolas-bonod ORCID : https://orcid.org/0000-0002-0187-4688
Alexis Amadon 3
Author IdHAL : alexis-amadon ORCID : https://orcid.org/0000-0002-2667-9387
Franck Mauconduit 3
Author
Cyril Poupon 3
Author
Denis Le Bihan 3
Author
Stefan Enoch 2
Author
1
CRMBM - Centre de résonance magnétique biologique et médicale (Faculté de médecine
27 Bd Jean Moulin
13385 MARSEILLE CEDEX 05 - France)
- AMU - Aix Marseille Université : UMR7339 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
- APHM - Assistance Publique - Hôpitaux de Marseille : UMR7339 (Direction générale AP-HM 80, rue Brochier 13 354 Marseille Cedex 5 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7339 (France)
2
FRESNEL - Institut FRESNEL (Faculté des Sciences et Techniques
avenue Escadrille Normandie Niemen
13 397 Marseille cedex 20 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7249/ UMR 6133 (France)
- ECM - École Centrale de Marseille (Pôle de l'étoile - Technopole de Château-Gombert - 38 rue Frédéric Joliot-Curie - 13013 Marseille - France)
- AMU - Aix Marseille Université : UMR7249/ UMR 6133 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
3
NEUROSPIN - Service NEUROSPIN (France)
- DRF (CEA) - Direction de Recherche Fondamentale (CEA) : DRF/JOLIOT (Direction de Recherche Fondamentale
Fundamental Research Division
CEA Saclay
91191 Gif-sur-Yvette
- France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
4
Multiwave Technologies AG ( 3 Chemin du Pre Fleuri, 1228 Geneva - Switzerland)
- Multiwave Technologies AG (Switzerland)
5
Institut Langevin - Ondes et Images (1 Rue Jussieu 75238 Paris Cedex 05 - France)
- UPD7 - Université Paris Diderot - Paris 7 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
- ESPCI Paris - Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (10 rue Vauquelin, 75231 Paris cedex 05 - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- SU - Sorbonne Université (21 rue de l’École de médecine - 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7587 (France)
Abstract : Background B1 homogeneity in 7T MRI remains an important challenge in order to fully benefit from the signal enhancement due to the stronger magnetization available in ultra-high field scanners. High-dielectric constant pads have been proposed and optimized for passive shimming purposes [1-3]. Common formulations of dielectric pads for 7T applications are based on BaTiO 3 mixed with water. They present some drawbacks such as performance decay over time and toxicity. While previous studies tackled directly the formulation problem introducing new dielectric materials and solvent [4], we adopted a new approach based on metamaterials [5]. We demonstrated that the hybridization of four parallel metallic wires arranged on a square unit cell provides the ability to control radiofrequency field inside a 7T head birdcage. In the present work, we show that these hybridized meta-atom (HMA) can be used to improve MRI acquisition in the presence of a head receive array routinely used for in vivo MRI protocol.
Document type :
Conference papers
Complete list of metadata
https://hal.archives-ouvertes.fr/hal-02508345
Contributor : Marc Dubois <>
Submitted on : Saturday, March 14, 2020 - 12:19:53 PM
Last modification on : Wednesday, April 14, 2021 - 3:37:29 AM
Long-term archiving on: : Monday, June 15, 2020 - 12:30:44 PM
Contributor : Marc Dubois <>
Submitted on : Saturday, March 14, 2020 - 12:19:53 PM
Last modification on : Wednesday, April 14, 2021 - 3:37:29 AM
Long-term archiving on: : Monday, June 15, 2020 - 12:30:44 PM
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Identifiers
- HAL Id : hal-02508345, version 1
Collections
ESPCI | EC-MARSEILLE | CRMBM | CEA | CEA-UPSAY | NEUROSPIN | JOLIOT | CEA-DRF | UNIV-AMU | SORBONNE-UNIVERSITE | M-CUBE | PARISTECH | UNIV-PARIS7 | LANGEVIN | USPC | CNRS | SU-SCIENCES | UNIV-PARIS | PSL | ESPCI-PSL | SU-TI | IF | GS-ENGINEERING
Citation
Marc Dubois, Lisa Leroi, Zo Raolison, Redha Abdeddaim, Tryfon Antonakakis, et al.. Enhancement of transmit and receive efficiencies with hybridized meta-atom in 7T head coil. International Society for Magnetic Resonance in Medicine 27th Annual Meeting, May 2019, Montréal, Canada. pp.1491. ⟨hal-02508345⟩
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