Centre National De La Recherche Scientifique

Institut National De La Sante Et De La Recherche Medicale

Supersonic Imagine

Université Paris Diderot-paris 7

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

Cardiawave

Sorbonne Université

Université Pierre Et Marie Curie (paris 6)

Universite Paris Cité

Université Paris 7—denis Diderot

Universite Paris 7

Centre National De La Recherche Scientifique-cnrs

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

Cardiawave Sa

Inserm

Mickael Tanter

Mathias Fink

Mathieu Pernot

Jeremy Bercoff

Gabriel Montaldo

Jean-Luc Gennisson

Claude Cohen-Bacrie

David Savery

Olivier Couture

Michael Vion

Thomas Deffieux

Patrick Tabeling

Mathieu Couade

Janine Cossy

Emmanuel Messas

Zsolt Lenkei

Claude Cohen Bacrie

Camille Jouvaud

Benoit Larrat

Olivier Villemain

Mohamed Redha Abdeddaim

Guillaume Goudot

Julien Derosny

Ralph Sinkus

Benoît Larrat

Claudia Errico

Jean-Luc Gennison

Jean-Francois Aubry

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 apparatus for treating vascular thrombosis with ultrasound, includes a therapeutic ultrasonic transducer, suitable for generating focused ultrasonic waves that propagate along an emission axis; an imaging ultrasonic transducer associated with the therapeutic transducer; a means for moving the focal spot of the therapeutic ultrasonic transducer along the emission axis with respect to the imaging transducer; a motorized mechanical system for translating the transducers along at least a first axis parallel to the emission axis and a second axis perpendicular to the first; and an electronic control system for driving the motorized mechanical system and the means for moving the focal spot of the therapeutic transducer.

Apparatus for treating vascular thrombosis by ultrasounds

The present invention aims at improving the Doppler imaging of a biological sample comprising blood. For this, it is proposed a method for imaging a biological sample (), the sample () comprising blood () comprising diffusors and solid tissue (), the method comprising obtaining observation, each observation being characterized by a different point spread function associating a signal to each location of the region of interest, the signal comprising a first contribution representative of the diffusors of blood vessels within the location, a second contribution representative of the tissue diffusors and a third contribution representative of blood signal associated to blood diffusors outside of the location, and estimating, for each location, the blood flow by using a statistical analysis.

Method for imaging a sample with blood and associated devices

An ultrasound imaging and therapy device includes an array of concentric annular ultrasound transducers, and an ultrasound imaging device situated inside an innermost transducer of the plurality of concentric annular ultrasound transducers, wherein it further comprises a mechanical linkage allowing a tilting movement of the array of concentric annular ultrasound transducers with respect to the ultrasound imaging device and in that the ultrasound imaging device protrudes in an axial direction from the array of concentric annular ultrasound transducers; whereby the ultrasound imaging device can be kept stationary and in direct or indirect contact with a patient's skin while the array of concentric annular ultrasound transducers is tilted so as to move a focal point of ultrasound waves generated by the concentric annular ultrasound transducers within an imaging region of the ultrasound imaging device.

Ultrasound imaging and therapy device

The present invention concerns a method for obtaining a functional parameter of a muscle having a part, the method comprising the steps of: a) applying ultrasound waves to the muscle, b) collecting the ultrasound waves retrodiffused by the muscle at a plurality of times, to obtain collected ultrasound waves, c) determining a first plurality of values representative of stiffness values of one part at a first plurality of times by using the collected ultrasound waves, d) determining a second plurality of values representative of deformation values of said part at a second plurality of times by using the collected ultrasound waves, and e) deducing at least one functional parameter based on the first plurality of values and the second plurality of values. The invention also concerns a corresponding device.

Method for obtaining a functional parameter of a muscle

An apparatus for treating or preventing a valvular disease comprises: a ultrasound probe located externally to a heart of patient, able to produce ultrasound waves focused inside the heart and suitable to generate, at a focal spot, a pressure sufficient to result in cavitation, an imaging device for mapping in real time a treatment region of a cardiac valve of the patient, the treatment region comprising at least one leaflet of the cardiac valve, a controller configured for driving the ultrasound probe to emit a sequence of focused ultrasound waves, the controller being further configured for steering the focused ultrasound waves so as to scan the entire treatment region to soften the tissues of the treatment region. A method for treating or preventing valvular disease, carried out using the apparatus is also provided.

Method and apparatus for treating valvular disease

The invention relates to a radio-frequency antenna system including at least one radio-frequency transmitter and/or receiver and resonators which are mutually electro-magnetically hybridised, coupled with the radio-frequency transmitter and/or receiver, and electrically insulated from one another and from the radio-frequency transmitter and/or receiver.

Radio-frequency antenna system based on mode hybridisation for a nuclear magnetic resonance device

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 which comprises emitting ultrasound into a liquid mixture containing first and second reagents in separate phases initially separated by a liquid precursor-gas barrier, the ultrasound having a high enough energy level to vaporize the precursor gas, such as to contact the reagents and thus to activate a chemical reaction therebetween.

Method for activating a chemical reaction, solution that can be activated by said method and device for implementing said method

A method of high-resolution ultrasound imaging, in which transducers are made to emit ultrasound waves in a field of observations containing micro bubbles, by making the micro bubbles burst one by one in tandem with the emissions of ultrasound waves. At each shot j of an ultrasound wave, raw reverberated signals S(i,t) picked up by each transducer i are recorded, and then differential signals V(i,t) representative of variations between successive raw signals are determined, a parabolic function P(x) is fitted to the differential signals corresponding to each shot j, and then a crest A(x,y) of this function P, corresponding to the position of the micro bubble destroyed between shots j&#x2212;1 and j, is determined.

Method and device for ultrasound imaging

An imaging method using shear waves for observing a viscoelastic medium, comprising:

Imaging method and apparatus using shear waves

A method for ultrasound imaging is provided. The method includes at least a transmission step, a coherence enhancing step, and a beamforming step. In the transmission step, a plurality of ultrasonic waves are transmitted into an imaged region and a set of raw data is acquired by an array of transducers in response to each ultrasonic wave. The ultrasonic waves have different spatial frequency content. In the coherence enhancing step, for each of a plurality of virtual transmit focal zones in the imaged region, at least one set of coherent data is synthesized from the sets of raw data. In the beamforming step, for each of a plurality of locations included in each of the virtual transmit focal zones, an image pixel is computed by beamforming, using the set of coherent data.

Method and apparatus for ultrasound synthetic imagining

A method of exploring by wave propagation, in which method an incident wave is emitted a plurality of times towards the same target zone (r) in a diffusing medium, and then the backscattered signals generated by the waves are averaged.

Method and apparatus for exploring by wave propagation

An ultrasound imaging method including an emission step during which an array of transducers is caused to emit at an ultrasound wave focused in a target medium by causing the excitation wave to pass through a reverberant solid object prior to reaching the target medium.

Growing community of inventors

Bagneux, France

Mickael Tanter