Ecole Polytechnique Federale De Lausanne

E-Scopics

Adrien Besson

Jean-Philippe Thiran

Marcel Arditi

François Maurice

Dimitris Perdios

Frederic Wintzenrieth

Florian Martinez

Frédéric Wintzenrieth

Pascal Bouscasse

Claude Cohen-bacrie

An apparatus for estimating a velocity of at least one scatterer in a medium, the apparatus including a curved array of virtual transducers (T-T) for emitting Archimedean spiral waves in a plurality of predetermined directions of propagation defined by a set of insonification angles, and for receiving, from the at least one scatterer, scattered signals generated by scattering of the Archimedean spiral waves emitted from the curved array of virtual transducers, a driving and processing unit (U) for estimating the velocity of the at least one scatterer.

Apparatus and method for estimating a velocity of at least one scatterer in a medium

The present invention concerns an array processing image reconstruction method comprising: receiving a set of echo waveforms as measurements from the object of interest; defining a measurement model linking an unknown image of the object to the measurements; defining a data fidelity functional using the measurement model; defining a regularisation functional using a trained non-linear mapping, the regularisation functional comprising prior knowledge about the unknown image; defining an optimisation problem involving the data fidelity functional and the regularisation functional for obtaining a first image estimate of the unknown image; and solving the optimisation problem to obtain the first image estimate.

Image reconstruction method based on a trained non-linear mapping

The present invention concerns a pulse wave image reconstruction method to be used for example in ultrasound imaging. The proposed method is based on an image measurement model and its adjoint operator. The proposed method introduces matrix-free formulations of the measurement model and its adjoint operator. The proposed method has the advantage that the reconstructed image has a very high quality and that it can be reconstructed quickly.

Model-based image reconstruction method

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Marseilles, France

Adrien Besson