Abstract: A process for detecting activity of a person, in which movements of the person are measured by at least one sensor attached to the person, and respective components of the movements due to external activity and due to physiological activity are separated. The process obtains a signal of the sensor, filters the signal to derive a filtered signal, the filtering including partitioning the signal of the center into a low frequency component and high frequency component, and subtracts the filtered signal from the signal of the sensor. The filtering further variably extracts portions of the high frequency component according to a criterion of either a minimal level or a minimal instability of the signal of the sensor, and the filtered signal includes the low frequency component and the extracted portions of the high frequency components.

Abstract: The invention relates to a tomosynthesis method by illuminating an object by means of an X-ray source (1) with a linear trajectory (2), the method comprising breaking down a volume of the object into N fanned out planes (P) formed between the linear trajectory (2) and a detecting plane (4) parallel to the linear trajectory, each fanned out plane of said N planes includes the linear trajectory; and performing anisotropic regularization on at least one fanned out plane (P).

Abstract: A sensor worn by a person measures movements of the person. Movements of orientation are not expressed by rotations leading from a stationary reference point to a reference point associated with the sensor, but by angles separating axes or planes of the stationary reference point and axes associated with the wearer, thereby making it possible to better identify his/her movements and his/her activity. The sensor can be applied to the monitoring of patients.

Abstract: A person under supervision wears a sensor consisting of at least one accelerometer (31) and a magnetometer (41), oriented in his vertical direction. A fall event is picked up when a significant and rapid oscillation of the acceleration signal coincides with a shift in the ambient magnetic field between two levels (between t=4000 and t=5000). Additional criteria that may also make use of the magnetometer enable the diagnosis to be made, and it is easier and safer to establish this than with accelerometers alone.

Abstract: A process for detecting activity of a person, in which movements of the person are measured by at least one sensor attached to the person, and respective components of the movements due to external activity and due to physiological activity are separated. The process obtains a signal of the sensor, filters the signal to derive a filtered signal, the filtering including partitioning the signal of the center into a low frequency component and high frequency component, and subtracts the filtered signal from the signal of the sensor. The filtering further variably extracts portions of the high frequency component according to a criterion of either a minimal level or a minimal instability of the signal of the sensor, and the filtered signal includes the low frequency component and the extracted portions of the high frequency components.

Abstract: The present invention relates to a method for determining the reference image of an image sensor comprising a matrix of detector pixels. The method comprises the acquisition of a black image IN and two images I1 and I2 acquired in linear detection zones of the sensor. The reference image is written: IR1=(Rm* I1?I2)/(Rm?1) with I R ? ? 1 = ( R m × I 1 - I 2 ) / ( R m - 1 ) ? with ? ? Rm = 1 N ? ? i , j ? I 2 ? ( i , j ) - I N ? ( i , j ) I 1 ? ( i , j ) - I N ? ( i , j ) , wherein IK (i,j) represents the value of the pixel of the image IK detected by the pixel detector situated at the intersection of the row i and the column j of the detector pixel matrix, and N represents the total number of pixels in the matrix.

Abstract: A sensor worn by a person measures movements of the person. Movements of orientation are not expressed by rotations leading from a stationary reference point to a reference point associated with the sensor, but by angles separating axes or planes of the stationary reference point and axes associated with the wearer, thereby making it possible to better identify his/her movements and his/her activity. The sensor can be applied to the monitoring of patients.

Abstract: A person under supervision wears a sensor consisting of at least one accelerometer (31) and a magnetometer (41), oriented in his vertical direction. A fall event is picked up when a significant and rapid oscillation of the acceleration signal coincides with a shift in the ambient magnetic field between two levels (between t=4000 and t=5000). Additional criteria that may also make use of the magnetometer enable the diagnosis to be made, and it is easier and safer to establish this than with accelerometers alone.

Abstract: The cameras (10) of this X-ray detector are all mounted on a common rigid plate (1) by a surface support and screwed to ensure their optical distance from a scintillator (7) itself mounted on the plate (1) by an enclosure (6) forming a darkroom (8). The common mounting of the principal elements of the detector on a single rigid plate thus significantly reduces image deterioration produced by deformations of the detector, of thermal or mechanical origin.

Abstract: The invention relates to a tomosynthesis method by illuminating an object by means of an X-ray source (1) with a linear trajectory (2), the method comprising a breakdown step into n planes (P) fanning out between the linear trajectory (2) and a detector plane (4) parallel to the linear trajectory. The method comprises an anisotropic regularization step over at least one plane (P). The invention is applied to medical imaging, to the field of non-destructive object testing, and more generally to any field applying reconstruction of objects moving past an X-ray source.

Abstract: This detection device comprises processing means (6) for distinguishing the movements of a person wearing a detector due to an external activity from movements due to his physiological activity. Movement sensor signals (4, 5) are filtered in different ways. The external activity is estimated and a subtraction gives the results for the physiological activity. Special processing is done to take account of exceptional states of the activity, such as sudden movement variations. Results can also be improves by discerning the type of activity being performed by the wearer. Finally, it is advantageous if several different sensors measure movements in different directions and if the most important measurements are chosen.

Abstract: A screen panel for converting X-rays into light photons includes a rigid foam plate (2), a first layer (1) of composite material located on one face of the rigid foam plate (2) and a second layer (3) of composite material located on the other face of the rigid foam plate, parallel to the first face. The screen panel applies, for example, to medical radiology and to non-destructive testing of nuclear waste storage packages.

Abstract: The present invention relates to a method for determining the reference image of an image sensor comprising a matrix of detector pixels.

Abstract: The cameras (10) of this X-ray detector are all mounted on a common rigid plate (1) by a surface support and screwed to ensure their optical distance from a scintillator (7) itself mounted on the plate (1) by an enclosure (6) forming a darkroom (8). The common mounting of the principal elements of the detector on a single rigid plate thus significantly reduces image deterioration produced by deformations of the detector, of thermal or mechanical origin.

Abstract: The present invention concerns a screen panel for converting X-rays into light photons. The panel comprises a rigid foam plate (2), a first layer (1) of composite material located on one face of the rigid foam plate (2) and a second layer (3) of composite material located on the other face of the rigid foam plate, parallel to the said first face.

Abstract: The present invention relates to a method for aligning an object, whose image is to be recorded, with an image capture apparatus and a coupling eyepiece. Said method consists in using a light source, said light source being positioned in the place of the object and emitting luminous dots through a mask and through the coupling eyepiece towards the capture apparatus. The invention also consists in verifying whether the images of said luminous dots are split into two on the image plane, then, using all the development functions determined for the various alignment settings, in determining a particular setting in which the distances between the images of the luminous dots are minimal.

Abstract: The present invention relates to a method for aligning an object, whose image is to be recorded, with an image capture apparatus and a coupling eyepiece. Said method consists in using a light source, said light source being positioned in the place of the object and emitting luminous dots through a mask and through the coupling eyepiece towards the capture apparatus. The invention also consists in verifying whether the images of said luminous dots are split into two on the image plane, then, using all the development functions determined for the various alignment settings, in determining a particular setting in which the distances between the images of the luminous dots are minimal.

Abstract: The invention relates to a process for the registration of two different images of the same object consisting of breaking down each of the images into space components representing the distribution of the grey levels of the image, applying a phase registration method to the components to bring about a correspondence between the components of one image with those of the other image, summating all the results of the bringing into correspondence and detecting, in the image resulting from said sum, the maximum grey level defining the transformation between the two initial images.

Abstract: The invention relates to a method for correcting image defects from a matrix-type X or &ggr;-ray detector, consisting in producing a confidence map on the basis of continuous confidence ratings, between 0 and 1, and representing the level of confidence assigned to each detector pixel. It then consists in using this confidence map to correct the defects of the matrix detector.

Abstract: The present invention relates to a system for determining the alignment of an object, whose image is to be recorded, with a coupling eyepiece and an image capture apparatus that defines an image plane (Pi), comprising: an image capture apparatus (2) equipped with the ability for adjusting its own position; a light source (1) that emits at least two non-focused luminous dots (1a, 1b); eyepiece coupling lens(es) or element(s) (3) that focus on an object plane (Po); an opaque mask (4) that is perforated with at least two holes (5a, 5b) and that is positioned in front of light source (1) such that it transmits at least part of the light emitted by the light source; and calculating mechanism for determining whether alignment exists and, in the case of non-alignment, for quantifying the non-alignment.