Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method for acquiring (1) experimental measures with interferences of a physical phenomenon, and for reconstructing (2) a point-by-point signal (3) representative of the phenomenon according to at least one dimension that can vary during the experimental measure acquisition, using at least one simulation model (4) of at least one acquisition chain of the experimental measures including at least one interference, and at least one model (8) 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 (6, 10) 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.

Abstract: 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.

Abstract: A method for acquiring (1) experimental measures with interferences of a physical phenomenon, and for reconstructing (2) a point-by-point signal (3) representative of the phenomenon according to at least one dimension that can vary during the experimental measure acquisition, using at least one simulation model (4) of at least one acquisition chain of the experimental measures including at least one interference, and at least one model (8) 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 (6, 10) 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.