Centre National De La Recherche Scientifique

Institut National De La Sante Et De La Recherche Medicale

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

Université Paris Diderot-paris 7

Supersonic Imagine

Université Pierre Et Marie Curie (paris 6)

Sorbonne Université

Université Pierre Et Marie Curie

Univ Paris Xiii Paris-nord Villetaneuse

Assistance Publique-hopitaux De Paris

Centre National De La Recherche Scientifique-cnrs

Universite Paris Cité

Inserm (institut National De La Sante Et De La Recherche Medicale)

Institut National De La Sante Et De La Recherche Medicale (inserm)

Association Institut De Myologie

Jean-Luc Gennisson

Mathieu Pernot

Mickaël Tanter

Mathias Fink

Thomas Deffieux

Mickael Tanter

Jeremy Bercoff

Claude Cohen-Bacrie

David Savery

Jean-Yves Hogrel

Thomas Similowski

Jean-Baptiste Laudereau

Mathieu Couade

Jean-Michel Tualle

Zsolt Lenkei

Bruno-Félix Osmanski

Mickaél Tanter

Clément Dupuy

François Ramaz

Ivan Cohen

Damien Bachasson

Martin Dres

Maimouna Bocoum

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

An acousto-optic imaging method in which light waves and unfocused acoustic waves having various directions of propagation m are emitted in a medium, by spatially modulating the amplitude of the ultrasonic transducers of an array of transducers according to several periodic spatial amplitude modulations j, and the resulting optical signal S(t) is captured. For each direction of propagation m, the signals S(t) are spatially demodulated in order to determine a signal S(t) used to reconstruct the image of the medium.

Acoustic-optical imaging methods and systems

The invention relates to a method for obtaining a numerical model, the numerical model associating at least one objective measurement to a subjective sensation, the method comprising the steps of: a) imaging the at least one area of the brain by using unfocused waves produced by a transcranial ultrasound probe (), to obtain at least one acquired image of the activity of the area, b) evaluating a physical quantity representative of the activity of the at least one area based on the acquired images, to obtain at least one objective measurement, c) obtaining from the subject at least one numerical value representative of a subjective sensation, and d) determining the numerical model by using the obtained objective measurement and the obtained numerical value.

Method for obtaining a numerical model associating an objective measurement to a subjective sensation using ultrasound imaging technique and associated device

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

The invention concerns a detecting apparatus () comprising:&#x2014;at least two sensors (), with at least one sensor () being an ultrasound transducer adapted to produce ultrasound waves, and&#x2014;a positioning device () defining several compartments (), each compartment () being adapted to hold a sensor () and each compartment () being located at predetermined location, the positioning device () comprising a holder adapted to be fixed on the skull of a subject, the positioning device () being adapted to be maintained on the head of the subject using the holder.

Detecting apparatus and associated kit and method

According to the invention, n incident acoustic waves Ei(t), obtained by linearly combining n elemental incident waves E(t) with an encoding matrix Hc are consecutively transmitted in a medium to be imaged. n reverberated waves Ri(t) from the medium to be imaged are then consecutively detected, following the transmission of the n incident waves; then n elemental reverberated waves R(t) are determined by linearly combining the detected n reverberated waves Ri(t) with a decoding matrix Hd. The Hc and Hd matrices are such that Hc&#xb7;Hd=D, where D is a diagonal matrix of order n, all the diagonal elements of which are greater than 1.

Acoustic imaging method and device for detecting linearly combined reverberated waves via decoding matrices

The invention concerns a detecting apparatus () for imaging at least two areas of a brain of a subject (), the detecting apparatus () comprising: &#x2014;a holder comprising: &#x2014;a frame () devoted to be cemented on the skull of the subject (), the frame () delimitating an inner portion () which is transparent to ultrasound waves, &#x2014;a removable imaging device comprising: &#x2014;a platform () delimitating an inner space (), the inner space () facing the inner portion (), &#x2014;a fixing element () adapted to temporary fix and lock the platform () to the holder, &#x2014;an ultrasound probe (), and &#x2014;a moving stage () holding the ultrasound probe () and being adapted to move the ultrasound probe () within the inner space ().

Detecting apparatus and associated imaging method

Method for functional imaging of the brain, comprising the following steps: (a) a brain is imaged by ultrasound imaging in order to obtain a vascular image to be studied (IVO), (b) the vascular image to be studied (IVO) is compared automatically, by shape recognition, with a cerebral vascular atlas (AV), and the vascular image to be studied (IVO) is thus located in the cerebral vascular atlas (AV), (c) a cerebral functional atlas (AF) corresponding to said cerebral vascular atlas (AV) and comprising cerebral functional zones () located in this cerebral vascular atlas (AV) is used in such a way as to identify cerebral functional zones () on the vascular image to be studied (IVO).

Method and device for functional imaging of the brain

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

Method and device for measuring velocity of shear waves in biological tissue

Method for measuring a physical parameter in soft tissues of a mammal, in which a mechanical shear wave is propagated through the soft tissues and observation of the propagation leads to determine values of a shear wave propagation parameter. The physical parameter is computed on the basis of these values.

Method and apparatus for measuring a physical parameter in mammal soft tissues by propagating shear waves

The invention relates to a method for measuring a mean visco-elasticity value for a soft material. The method uses a single probe carrying at least one transducer and includes the steps of: (a) 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, (b1) measuring, with the transducer, the transient tissue displacements in at least one first measurement zone in the tissue, and wherein the first measurement zone is located away from the constraint zone, and (c) 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.

Growing community of inventors

Cergy, France

Jean-Luc Gennisson