Universite Dé Lorraine

Centre Hospitalier Regional De Nancy

General Electric Company

Institut National De La Sante Et De La Recherche Medicale

UniversitÉde Strasbourg

Schiller Medical S.a.s.

Université Henri Poincaré-Nancy I

Schiller Medical

Centre Hospitalier Regional Universitaire De Nancy

Centre Hospitalier Et Universitaire De Nancy

Jacques Felblinger

Michel Kraemer

Johann-Jakob Schmid

Freddy Odille

Pierre-André Vuissoz

Pierre-Andre Vuissoz

Guido Kudielka

Anne Menini

Roger Abächerli

Laurent Bonnemains

Vincent Frick

Christophe Meyer

Didier Meyer

Gregory Petitmangin

André Guillou

Grégory Petitmangin

Cédric Pasquier

Slavisa Jovanovic

Jean-Philippe Blonde

Benjamin Roussel

Julien Oster

A method is provided for determining a personalized cardiac model, including steps of (i) computing a velocity time profile of a blood flow across a selected area of the heart or the aorta during at least one cardiac cycle, using data acquired with a Magnetic Resonance Imaging (MRI) device; (ii) performing a segmentation of the velocity time profile so as to identify cardiac phases according to a predefined generic cardiac model; and (iii) computing normalized time location and/or duration of the cardiac phases within cardiac cycles so as to define a personalized cardiac model.

Method for determining a personalized cardiac model using a magnetic resonance imaging sequence

The system of the invention utilizes a magnetic resonance imaging (MRI) coil to measure power at a different frequency than the MRI frequency to produce MRI images. The different frequency such as harmonic frequency of the MR coil is applied to the coil and the reflected power is measured by the power sensor. Changes due to respiratory, cardiac, or overall motion are then analyzed, as desired. During imaging, the coil is connected to the MRI system and disconnected from the setup described, including the power sensor and its associated data processing, amplifier, signal generator, and directional coupler. Disconnect is provided in a one-step process by the switching circuit. Using the reflected power of a different frequency than the resonant frequencies of an MR coil improves signal information because it does not interfere with MR imaging process, is independent of patient and position, depicts the mechanical motion of the chest or organs near to the coil, and also measures irregular physiological activities with enough temporal resolution to describe these physiological changes.

Power measurement on magnetic resonance imaging coil at different frequency than Larmor frequency

A method is provided of reconstructing imaging signals in a biological medium on the basis of experimental measurements perturbed by movements, implementing measurements representative of the movements, at least one model of movement including movement parameters, and an imaging sampling grid, which method furthermore includes steps of (i) constructing a movement sampling grid by selecting a restricted set of points on the basis of the imaging sampling grid, and (ii) calculation of movement parameters by inverting a linear system at the points of the movement sampling grid. Devices implementing the method are also disclosed.

Method of reconstructing a signal in medical imaging on the basis of perturbed experimental measurements, and medical imaging device implementing this method

A method for acquiring () experimental measures with interferences of a physical phenomenon, and for reconstructing () a point-by-point signal () representative of the phenomenon according to at least one dimension that can vary during the experimental measure acquisition, using at least one simulation model () of at least one acquisition chain of the experimental measures including at least one interference, and at least one model () of each interference in each acquisition chain, each interference model being determined at least from the measures themselves, wherein the simulation and interference models include adjustable parameters () depending on experimental conditions, wherein at least one adjustable parameter of one of the models is coupled to at least one adjustable parameter of the other model, and in that the adjustable parameters are optimized in a coupled manner. A device for MRI imaging, NMR, or medical imaging using such a method is described.

Method for reconstructing a signal from distorted experimental measurements and device for its implementation

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Jacques Felblinger