Abstract: An OPM sensor fastening system includes a support socket for positioning the sensor, the support socket having a base and a housing for accommodating a portion of the OPM sensor, and a locking part for locking the sensor in the support socket, the locking part having an open base suitable for accommodating the base of the socket, a housing for accommodating a portion of the OPM sensor, and a removable partition suitable for letting the OPM sensor pass. The locking part is configured to press-fittingly cooperate with the support socket so as to blockingly wedge the OPM sensor in the longitudinal position relative to the socket.

Abstract: A system for positioning and maintaining a position of a reference sensor around a magnetoencephalography helmet. The system includes an arch comprising at least one fixing branch for fixing the arch to an MEG helmet, a support plate on which the branch is fixed, a sensor support post fixed to the support plate of the arch; and a locking component for fixing the reference sensor to the post in at least one position defining the position with respect to an MEG helmet.

Abstract: The present description concerns a support helmet (130) for a medical imaging or treatment device, comprising a head cap (131) provided with a plurality of through openings (133), each opening being adapted to receiving an elementary imaging or treatment module (110) assembled in the opening so as to slide along an axis substantially orthogonal to the head cap.

Abstract: A device for improving the precision of a biomagnetic image of a patient is provided. The device comprises a covering, a plurality of markers and at least five three-axis coils. Three-axis coils and markers of the plurality of markers are placed at the same location on the covering so that, when the covering is positioned on the patient, singular points of the part of the patient can be detected by magnetic resonance imaging and by biomagnetic imaging (MEG, MCG).

Abstract: The present description concerns a support helmet (130) for a medical imaging or treatment device, comprising a head cap (131) provided with a plurality of through openings (133), each opening being adapted to receiving an elementary imaging or treatment module (110) assembled in the opening so as to slide along an axis substantially orthogonal to the head cap.

Abstract: The invention relates to a method of localisation of vector magnetometers arranged in a network, comprising the following steps: generation (EMi), by a magnetic field source (S), of m reference magnetic fields with known amplitudes and known and distinct directions; measurement (MESj) of the m reference magnetic fields along n axes of magnetometers in the network, m and n being such that m*n?6; determination (LOCj) of the position and orientation of magnetometers of the network from said measurements, relative to the magnetic field source. The invention also includes a magnetic field measurement instrument that includes a network of vector magnetometers and is capable of implementing the localisation method. Application to the imagery of biomagnetic fields, for example in magnetocardiography or in magnetoencephalography.

Abstract: This processing method provides the ability to process a volume mode with an object intended to be added to or subtracted from said model. The volume model includes points arranged according to a spatial grid in a first reference system, each point being assigned an intensity value. The object has points positioned in a second reference system that is distinct from the first reference system. The method includes the calculation, for each point of the object, of an image point in the first reference system using a transfer function. The method further includes the modification of the intensity of points of the volume model by applying a correction function associated with each image point, the value of the correction function at a point of the volume model being dependent on the position of said point relative to said image point with which said correction function is associated.

Abstract: Method for locating a brain activity, including the following steps: a) applying to a subject a first series of sensory stimuli and acquiring, by a group of sensors, respective first series of signals representative of a brain activity associated with a first task effected or imagined by the subject in response to the sensory stimuli of the first series, each sensor being sensitive to the activity of a respective region of the brain of the subject; b) applying to the subject a second series of sensory stimuli and acquiring, by the group of sensors, respective second series of signals representative of a brain activity associated with a second task, different from the first task, effected or imagined by the subject in response to the sensory stimuli of the second series; and c) constructing, for each sensor, a multidimensional variable representative of the corresponding first and second series of signals, and determining a coefficient of correlation between the multidimensional variable and an observation vec

Abstract: The invention relates to a method for estimating the brain activity, from physiological signals, in particular magnetoencephalographic or electroencephalographic surfaces, which has, in certain predetermined areas of the cortex, considered as areas of interest, an improved accuracy with respect to other areas of the gridding. It enables a more accurate estimation to be obtained in the areas of the brain intended to be subjected to a particular treatment, for example to accommodate cortical electrodes.

Abstract: The invention relates to a method for estimating the electrical activity of a tissue using a plurality of sensors, in particular the brain activity related to a motor task performed, imagined, or visualized by a subject, using a plurality of magnetoencephalographic or electroencephalographic sensors, when this subject is submitted to a stimulus. The estimation method is based on an MNE criterion in which the coefficients of the covariance matrix of the physiological signals acquired by the different sensors are weighted using the correlation coefficients of these signals with a signal representative of the stimulus.

Abstract: This processing method provides the ability to process a volume mode with an object intended to be added to or subtracted from said model. The volume model includes points arranged according to a spatial grid in a first reference system, each point being assigned an intensity value. The object has points positioned in a second reference system that is distinct from the first reference system. The method includes the calculation, for each point of the object, of an image point in the first reference system using a transfer function. The method further includes the modification of the intensity of points of the volume model by applying a correction function associated with each image point, the value of the correction function at a point of the volume model being dependent on the position of said point relative to said image point with which said correction function is associated.

Abstract: Method for locating a brain activity, comprising the steps consisting in: a) acquiring data indicative of sensory stimuli addressed to, or deliberate actions performed or imagined by, a subject; b) by means of a plurality of sensors, acquiring signals representative of an activity, associated with said stimuli or deliberate actions, of respective regions of the brain of said subject; and c) for each said sensor, quantifying a correlation that exists between said data indicative of sensory stimuli or of deliberate actions and the signals acquired; characterized in that, for each said sensor, said correlation is established between a scalar variable indicative of a said sensory stimulus or of a said deliberate action and a multidimensional variable representative of signals that are associated therewith. Application of this method to the determination of optimum locations for brain activity sensors for direct neural control.