Centre National De La Recherche Scientifique

Supersonic Imagine

Ecole Superieure De Physique Et De Chimie Industrielles De La Ville De Paris

Université Paris Diderot-Paris 7

Institut National De La Sante Et De La Recherche Medicale

U.S. Philips Corporation

Other

Fujitsu Corporation

L'oreal

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Safran

Sorbonne Université

Compagnie Plastic Omnium

Centre National De La Recherche Scientifique-cnrs

Universite Paris Cité

Mathias Fink

Geoffroy Lerosey

Alexandre Aubry

Mickael Tanter

Mickaël Tanter

William Lambert

Arnaud Tourin

Jeremy Bercoff

Julien De Rosny

Mathieu Pernot

Jean-Luc Gennisson

Gabriel Montaldo

Fabrice Lemoult

David Savery

Thomas Frappart

Jacques Lewiner

Ros Kiri Ing

Ralph Sinkus

Claude Cohen-Bacrie

Stefan Catheline

Philipp Del Hougne

Mathieu Couade

Arnaud Derode

Victor Barolle

Claude Boccara

Julien De La Gorgue De Rosny

Amaury Badon

Matthieu Dupre

Nicolas Quieffin

Timmy Floume

Laura Cobus

Olivier Couture

Eric Carreel

Laurent Sandrin

Raoul Mallart

Jean-Pierre Nikolovski

Albert Claude Boccara

Patrick R Pesque

Bernard Querleux

Thomas Similowski

Jean-Louis Pierre Thomas

Claire Prada

Janine Cossy

Jean-François Aubry

Clément Papadacci

Aurélien Baelde

Nadége Kaina

Christian Leray

Frédéric Jenson

Jean-Baptiste Gros

Benoit Larrat

Claude Cohen Bacrie

Camille Jouvaud

Flavien Bureau

Viacheslav Mazlin

Fabrice Cancre

Nathan Jeger-Madiot

Peng Xiao

Micha&euml;l Tanter

Nicolas Etaix

Mathieu Bancelin

Patrick Tabeling

Julien Derosny

Ourir Abdel Waheb

Mohamed Redha Abdeddaim

Mathieu Dupre

Michaël Tanter

Jérôme Laurent

Thérèse Baldeweck

Jean-Luc Genisson

Ros Kiri Kiri Ing

Ronan Stephan

Nadège Kaina

Benoît Larrat

Nadège KAÏNA

Jean-Luc Gennison

Ourir Abdelwaheb

Method for non-invasively characterizing a heterogeneous medium using ultrasound, comprising a step of generating a series of incident ultrasonic waves, a step of recording an experimental reflection matrix R(t) defined between the input emission basis (i) and an output reception basis (u), a step of determining a response REP(r,Δr) of the medium between an input virtual transducer (TV) calculated based on an input focusing of the experimental reflection matrix that creates an input focal spot around a first point (P), and an output virtual transducer (TV) calculated based on an output focusing of the experimental reflection matrix that creates an output focal spot around a second point (P), said response being expressed as a function of a central point (PC) of spatial position (r) in the medium located midway between the first and second points (P, P).

Method and system for non-invasively characterizing a heterogeneous medium using ultrasound

A method for measuring a mean visco-elasticity value for a soft material using a single probe carrying at least one transducer includes inducing, in a constraint zone, at least one burst of mechanical vibrations in order to generate internal shear waves in the tissue propagating from the constraint zone into the tissue, measuring, with the transducer, transient tissue displacements in at least one first measurement zone in the tissue, the first measurement zone being located away from the constraint zone, and estimating a mean visco-elasticity of the region of the tissue situated between the constraint zone and the first measurement zone from the measured transient tissue displacements of the tissue in the first measurement zone.

Method and device for measuring a mean value of visco-elasticity of a region of interest

Method for ultrasonic characterization of a medium, including generating a series of incident ultrasonic waves, generating an experimental reflection matrix R(t) defined between the emission basis (i) as input and a reception basis (u) as output, and determining a focused reflection matrix RFoc(r, r, δt) of the medium between an input virtual transducer (TV) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TV) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TV) being obtained at a time instant that is shifted by an additional delay δt relative to a time instant of the responses of the input virtual transducer (TV).

Method and system for ultrasonic characterization of a medium

According to one aspect, the invention relates to a system () for in vivo, full-field interference microscopy imaging of a scattering three-dimensional sample. It comprises a full-field OCT imaging system () for providing en face images of the sample, wherein said full-field OCT system comprises an interference device () with an object arm () intended to receive the sample and a reference arm () comprising an optical lens () and a first reflection surface (), and an acquisition device () configured to acquire a temporal succession of two-dimensional interferometric signals (I, I) resulting from interferences produced at each point of an imaging field; an OCT imaging system () for providing at the same times of acquisition of said two-dimensional interferometric signals, cross-sectional images of both the sample and a first reflection surface () of said full-field OCT imaging system (); a processing unit () configured to determine a plurality of en face images (X-Y) of a plurality of slices of the sample, each en face image being determined from at least two two-dimensional interferometric signals (I, I) having a given phase shift; determine from the cross-sectional images provided by the OCT imaging system () at the times of acquisition of each of said two two-dimensional interferometric signals (I, I) a depth (z) for each en face image (X-Y) of said plurality of slices; determine a 3D image of the sample from said plurality of en face images of said plurality of slices of the sample and depths.

Methods and systems for in vivo full-field interference microscopy imaging

Method and system for ultrasonic characterization of a medium Method for ultrasonic characterization of a medium, comprising generating a series of incident ultrasonic waves, generating an experimental reflection matrix Rui(t) defined between the emission basis (i) as input and a reception basis (u) as output, determining a focused reflection matrix RFoc(rin, r, at) of the medium between an input virtual transducer (Win) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TVout) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TVout) being obtained at a time instant that is shifted by an additional delay 6t relative to a time instant of the responses of the input virtual transducer (TVin).

A method for mapping fibrous media by propagation of ultrasound from a set transducers, wherein: a number of unfocused incident ultrasonic waves having different wavefronts are emitted; the signals reverberated by the medium toward each transducer are captured; coherent signals respectively corresponding, for each transducer, to contributions coming from different fictitious focal points in the medium are determined; and then the orientation of the fibers is determined by comparing a spatial coherence between said coherent signals, in a plurality of directions.

Method and device for mapping fibrous media

Method for ultrasonic characterization of a medium, comprising generating a series of incident ultrasonic waves, generating an experimental reflection matrix R(t) defined between the emission basis (i) as input and a reception basis (u) as output, and determining a focused reflection matrix RFoc(r, r, &#x3b4;t) of the medium between an input virtual transducer (TV) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TV) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TV) being obtained at a time instant that is shifted by an additional delay &#x3b4;t relative to a time instant of the responses of the input virtual transducer (TV).

A body part for a motorized land vehicle is provided. The body part includes at least one wall made of a plastic material and including at least one housing forming a cavity for electromagnetic waves, said housing includes: at least one transceiver for transmitting and/or receiving an electromagnetic wave in said housing; at least one adaptable surface capable of reflecting the electromagnetic wave transmitted by the transceiver in a given direction (in a controlled manner) and, conversely, capable of reflecting the electromagnetic wave coming from the exterior of the housing toward the transceiver.

Vehicle body part comprising at least one directional antenna

The present invention relates to a method for the non-invasive optical characterization of a heterogeneous medium, comprising: a step of illuminating, by means of a series of incident light waves, a given field of view of the heterogeneous medium, positioned in a focal plane of a microscope objective (); a step of determining a first distortion matrix (D, D) in an observation basis defined between a conjugate plane of the focal plane (FP) and an observation plane, said first distortion matrix corresponding, in a correction basis defined between a conjugate plane of the focal plane and an aberration correction plane, to the term-by-term matrix product of a first reflection matrix (R) of the field of view, determined in the correction basis, with the phase conjugate matrix of a reference reflection matrix, defined for a model medium, in said correction basis; and a step of determining, from the first distortion matrix, at least one mapping of a physical parameter of the heterogeneous medium.

Method and systems for the non-invasive optical characterization of a heterogeneous medium

Method for determining a characteristic of detection and/or identity information and/or location information of a receiver, wherein: a) a primary wave is emitted by an antenna, b) adjustable elements are controlled with a plurality of sets of parameters, to modify the propagation of a primary wave and/or of a secondary wave coming from the receiver, and c) signals received by the antenna are saved, and d) the characteristic of the receiver in the medium is determined based on the signals received for each set of parameters.

Method for determining a characteristic of a receiver in a medium, and system implementing this method

A method for characterizing an anisotropic soft medium (C) including fibers and having an outer surface (), by observing in different propagation directions, the propagation of a divergent shear wave from a central area () in the anisotropic soft medium. A propagation parameter of the shear wave is inferred therefrom in each of the propagation directions, and then a direction of the fibers of the anisotropic soft medium, a rheological elasticity parameter are determined in a direction perpendicular to the fibers and a rheological elasticity parameter in the direction of the fibers.

Ultrasonic method and device for characterising weak anisotropic media, and ultrasonic probe assembly for such a characterisation device

In a first aspect, the present description relates to a system for non-invasively characterizing a heterogeneous medium using ultrasound, comprising at least one first array () of transducers configured to generate a series of incident ultrasound waves in a region of said heterogeneous medium and record the ultrasound waves which are backscattered by said region as a function of time, as well as a computing unit () which is coupled to said at least one first array of transducers and configured to: record an experimental reflection matrix defined between an emission basis at the input and the basis of the transducers at the output; determine, from said experimental reflection matrix, at least one first wideband reflection matrix defined in a focused base at the input and output; determine a first distortion matrix defined between said focused basis and an observation basis, said first distortion matrix resulting, directly or after a change of basis, from the term-by-term matrix product of said first wideband reflection matrix defined between said focused basis and an aberration correction basis, with the phase-conjugated matrix of a reference reflection matrix defined for a model medium, between the same bases; determine, from said first distortion matrix, at least one mapping of a physical parameter of said heterogeneous medium.

Methods and systems for non-invasively characterizing a heterogeneous medium using ultrasound

Antenna for transmitting and/or receiving an electromagnetic wave, including a radiating element, a tunable surface of variable impedance, and a controller connected to the tunable surface and which controls it based on a desired direction of the electromagnetic wave. The radiating element and the tunable surface are integrated inside a housing, the housing forming a cavity for the waves and including an opening for the electromagnetic wave to be transmitted to the outside.

Antenna for transmitting and/or receiving an electromagnetic wave, and system comprising this antenna

A communication network includes an access point, a control unit in communication with the access point, a wave shaping device in communication with the control unit, and a wireless communication device. The control unit determines parameters of the wave shaping device, the parameters being search parameters if the control unit does not receive a pilot signal, and optimization parameters if the control unit receives a pilot signal.

Communication network access point, communication network, and method of wireless communication

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Meudon, France

Mathias Fink