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公开(公告)号：US20230324485A1
公开(公告)日：2023-10-12
申请号：US18011406
申请日：2021-06-15
申请人： UNIVERSITÉ D'AIX MARSEILLE , Centre National de la Recherche Scientifique , Ecole Centrale de Marseille , Multiwave Imaging
发明人： Marc Dubois , Kaizad Rustomji , Tania Del Socorro Vergara Gomez , Elodie Virginie Emilia Georget , Frank Kober , Redha Abdeddaim , Stanislas Pierre Alain Rapacchi , Stefan Enoch , Tryfon Antonakakis
IPC分类号： G01R33/389 , G01R33/34 , G01R33/48
CPC分类号： G01R33/389 , G01R33/34076 , G01R33/4806
摘要： A system is described for emitting a radiofrequency field for a magnetic resonance imaging device, including a volumetric antenna that emits a radiofrequency field, a device for homogenizing the radiofrequency field arranged between said volume antenna and a part of the body to be imaged. The device may include a first continuous metal track with an overall length of approximately 0.5 to approximately 1.5 times said wavelength of the radio frequency field. The first metallic track may occupy a surface with a largest dimension ranging between approximately 5% and approximately 15% of said wavelength of the radio frequency field. The first metal track is arranged in a pattern including a plane of symmetry that is normal to the electrical component of the radio frequency field, so as to give the device an electric dipole property including a natural frequency strictly greater than the frequency of the radio frequency field.
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公开(公告)号：US20220146710A1
公开(公告)日：2022-05-12
申请号：US17430961
申请日：2020-02-14
申请人： Université D'Aix-Marseille , Centre National de la Recherche Scientifique , Ecole Centrale de Marseille , Multiwave Innovation
发明人： Elena Mikheeva , Redha Abdeddaim , Stefan Enoch , Julien Lumeau , Ivan Voznyuk , Tryfon Antonakakis
摘要： A method for manufacturing an optical metasurface is configured to operate in a given working spectral band. The method comprises: obtaining a 2D array of patterns, each comprising one or more nanostructures forming dielectric elements that are resonant in said working spectral band, said nanostructures being formed in at least one photosensitive dielectric medium; exposing said 2D array to a writing electromagnetic wave having at least one wavelength in said photosensitivity spectral band, said writing wave having a spatial energy distribution in a plane of the 2D array that is a function of an intended phase profile, so that each pattern of the 2D array produces on an incident electromagnetic wave having a wavelength in the working spectral band, a phase variation corresponding to a refractive index variation experienced by said pattern during said exposure.
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公开(公告)号：US11278733B2
公开(公告)日：2022-03-22
申请号：US17050342
申请日：2019-04-16
申请人： Université d'Aix Marseille , Centre National de la Recherche Scientifique , Ecole Centrale de Marseille , Assistance Publique—Hôpitaux de Marseille , Multiwave Technologies AG
发明人： Stefan Enoch , Redha Abdeddaim , Éric Émile David Guedj , Raphaëlle Richieri Le Rouzic , Megdouda Benamara , Marie Coralie Bultot , Michael Kefeder , Tryfon Antonakakis , Elodie Georget-Paris , Fouad Fezari
摘要： This magnetic emission device includes an antenna and further includes a device configured to select one of a plurality of predefined portions of the antenna and to connect the selected portion to a current-generating device in order both to cause the current to pass through the selected portion of the antenna so as to radiate a magnetic field, and to prevent the current from passing outside of the selected portion of the antenna.
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公开(公告)号：US20200048858A1
公开(公告)日：2020-02-13
申请号：US16343605
申请日：2017-10-20
申请人： IMPERIAL COLLEGE INNOVATIONS LIMITED , UNIVERSITE D'AIX MARSEILLE , ECOLE CENTRALE DE MARSEILLE , CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
发明人： Tryfon Antonakakis , Richard Craster , Younes Achaoui , Stefan Enoch , Sebastien Guenneau , Stephane Brule
IPC分类号： E02D31/08
摘要： A seismic wave shield for protecting an area from seismic vibrations and a method of shielding an area from seismic waves by installing a seismic wave shield. The seismic wave shield comprises a set of columns embedded in regolith and in contact with bedrock. There is a material contrast between a material forming the columns and the regolith.
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公开(公告)号：US11655610B2
公开(公告)日：2023-05-23
申请号：US16343605
申请日：2017-10-20
申请人： IMPERIAL COLLEGE INNOVATIONS LIMITED , UNIVERSITE D'AIX MARSEILLE , ECOLE CENTRALE DE MARSEILLE , CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
发明人： Tryfon Antonakakis , Richard Craster , Younes Achaoui , Stefan Enoch , Sebastien Guenneau , Stephane Brule
摘要： A seismic wave shield for protecting an area from seismic vibrations and a method of shielding an area from seismic waves by installing a seismic wave shield. The seismic wave shield comprises a set of columns embedded in regolith and in contact with bedrock. There is a material contrast between a material forming the columns and the regolith.
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