Abstract: A method for X-ray imaging of a body using an imaging device comprising an image sensor and an X-ray emitter which operates at different emission spectra, wherein the method includes: acquiring a first image resulting from the passage through the body of X-rays emitted by the X-ray emitter with a first emission spectrum; calculating characteristics of the body on the basis of the first image, and calculating a second and a third emission spectrum based on the characteristics of the body, wherein the first, second and third emission spectra are distinct from one another; acquiring a second and third image resulting from the passage through the body of X-rays emitted by the X-ray emitter with the second and third emission spectrum respectively; and modeling the body by generating thickness charts for different materials comprising the body on the basis of the three images.

Abstract: In an image-processing method for the detection of radiological signs in series of 3D data, an algorithm is used to detect radiological signs in a digital volume according to their contrasts. This algorithm is applied to reconstructed slices or directly to the series of projections. This algorithm is made by means of linear differential filters for signal analysis. It is used to color or enhance the intensity of the detected radiological signals according to the degree of malignancy.

Abstract: A mammography device comprising at least one X-ray source, a C-arm which supports said source, as well as a console which integrates an X-ray detector, wherein the C-arm and the console are movable relative to one another. The wherein C-arm and the console are mechanically decoupled from one another so that the C-arm and/or the console are movable relative to one another, between an exposure-taking position where the C-arm is in an immediate vicinity of the console, and a position wherein the C-arm and the console are separated from one another and wherein access to said C-arm and/or to said console is facilitated.

Abstract: A method for radiological image processing that includes: locating, on a radiological image provided by an imaging device, elements that may constitute signs of micro-calcification and displaying an image on which the intensity of elements thus localized is enhanced.

Abstract: A processing method for images obtained by tomosynthesis comprising acquisition of a plurality of 2D projection images of a region of interest of a patient; reconstruction of a 3D digital image from the acquired 2D projection images. An embodiment of the method is characterised in that it comprises: detection of an object in the reconstructed image; estimation of a thickness limit characteristic of a contrast default of the voxels for a diameter of the object; estimation of the thickness of the object; comparison of the thickness of the object to the thickness limit; and in that if the thickness of the object is less than the thickness limit, the method further comprises application at least to the voxels of the object in the reconstructed image of a multiplicative corrective factor equal to the ratio between the thickness limit and the thickness of the object.

Abstract: A derivation procedure for a three-dimensional digital mask from a series of two-dimensional masks in a radiographic device containing a source (S) of X-rays, a means of recording and a volume of interest hat contains the object to be X-rayed located between the source (S) and the means of recording consists of an extrapolation of each mask M?2 includes determining a last segment lfin beyond the limits of the means of recording; and working out a two-dimensional mask M? associated with a position S? of the source, for any angle ? included in the angular range ?2 to ?1 (a position close to ?2). For every parallel segment l located between segment d (or d? respectively) and segment lfin, the procedure further includes deriving a three-dimensional mask (21) of the object for each voxel at the intersection of plane P1?2 and the volume of interest; and projecting the three-dimensional mask onto the segment l.

Abstract: A method and apparatus for calibrating an apparatus that acquires a sequence of radiographic images and correcting images of an object under observation. For each image of a sequence acquired by the apparatus and for a given frequency of acquisition of the sequence, the apparatus is calibrated by determining the value of the variation of a mean of gray levels in at least one zone of interest of the current image of at least one calibration device, the variation being determined relative to the mean gray level of the first image of the sequence in each zone of interest. The determination of the variation is reiterated for a series of images sequences acquired using calibration devices resulting in first images of mean gray levels different from one sequence to another.

Abstract: The invention relates to a mammography device comprising at least one X-ray source, a C-arm which supports said source, as well as a console which integrates an X-ray detector, characterised in that the C-arm and the console are movable relative to one another. The device is also characterised in that the C-arm and the console are mechanically decoupled from one another, the C-arm and/or the console being movable relative to one another, between an exposure-taking position wherein the C-arm is in the immediate vicinity of the console, and a position wherein the C-arm and the console are separated from one another and wherein access to said C-arm and/or to said console is facilitated.

Abstract: A system to illustrate image data of an imaged subjected is provided. The system comprises an imaging system, an input device, an output device, and a controller in communication with the imaging system, the input device, and the output device. The controller includes a processor to perform program instructions representative of the steps of generating a three-dimensional reconstructed volume from the plurality of two-dimensional, radiography images, navigating through the three-dimensional reconstructed volume, the navigating step including receiving an instruction from an input device that identifies a location of a portion of the three-dimensional reconstructed volume, calculating and generating a two-dimensional display of the portion of the three-dimensional reconstructed volume identified in the navigation step, and reporting the additional view or at least one parameter to calculate and generate the additional view.

Abstract: A sensor comprises two identical vibrating members operating with a common working frequency and joined to each other by a mechanical decoupling device. The device comprises a frame and two connecting bridges each supporting one member. The frame comprises a succession of mass portions and thinned portions so that the frequency of one mode of structural resonance of the frame is substantially equal to the common working frequency, and each connecting bridge is disposed in a node of vibration of the frame at the common working frequency. Thus, the vibrations of the two vibrating members are decoupled from each other.

Abstract: A method and apparatus for calibrating an apparatus that acquires a sequence of radiographic images and correcting images of an object under observation. For each image of a sequence acquired by the apparatus and for a given frequency of acquisition of the sequence, the apparatus is calibrated by determining the value of the variation of a mean of gray levels in at least one zone of interest of the current image of at least one calibration device, the variation being determined relative to the mean gray level of the first image of the sequence in each zone of interest. The determination of the variation is reiterated for a series of images sequences acquired using calibration devices resulting in first images of mean gray levels different from one sequence to another.

Abstract: The invention relates to a method of correcting a digital mammogram of a breast containing an implant. According to the invention, brightnesses situated at and around the implant peak (PI) in the low frequency component of the image (XLP) are attenuated (ATT) as compared with a function (P1) that is applied to the other brightnesses, thereby attenuating the implant. The invention also provides a method of segmenting an implant in a radiographic image, the method being characterized by the following steps: smoothing the image by a noise-reducing lowpass filter, applying a non-directional spatial derivative filter, pixel thresholding, and selecting an outline to define the segmented portion of the image that corresponds to the implant.

Abstract: In a method for the processing of radiology images for detection of radiological signs, an algorithm is provided to detect such radiological signs on projections as a function of their contrasts. These contrasts are measured by using the responses of linear differential filters with different scale parameters. The method can be used to color or enhance the intensity of the radiological signs detected as a function of their degree of malignancy. The algorithm may be applied directly to the signal given by the detector.

Abstract: In an image-processing method for the detection of radiological signs in series of 3D data, an algorithm is used to detect radiological signs in a digital volume according to their contrasts. This algorithm is applied to reconstructed slices or directly to the series of projections. This algorithm is made by means of linear differential filters for signal analysis. It is used to color or enhance the intensity of the detected radiological signals according to the degree of malignancy.

Abstract: An apparatus and method for medical imaging, particularly for mammography, wherein a body organ, such as a breast, is exposed to X-rays and the X-rays are collected after attenuation through the object. The recorded attenuations are processed and displaying a result of this processing in the form of a representation of an image of the object. The processing of the recorded attenuations form includes automatic classification of zones of the breast into pathological or non-pathological classes. The automatic classification takes into account at least one classification input into the apparatus in advance in association with data that can be collected by the apparatus, and using this prior classification as a reference in order to produce a classification of the same type if there is similarity between the collected data and the data associated with this reference classification.

Abstract: A method and computer program and device for evaluation of the radiographic image quality of a phantom containing cells with two visualizable objects in which: the coordinates of each phantom cell are determined on each phantom image; for each phantom cell containing at least two objects: a level of a radiographic reference signal is calculated in an area of reference at right angles with the first object whose position in the cell is known; for each area of the cell capable of containing the other object: a search area formed by a set of pixels is defined; for each pixel of the search area: a signal sample is extracted in an area of interest centered on the pixel and of the same size as the reference area; a logarithmic probability function is calculated between the sample and the reference signal, the probability function corresponding to a mathematical observer; a surface parameter of the set of probability values thus obtained is calculated; the area of interest whose surface has a peak is selected as are

Abstract: An x-ray device comprises means for the production of at least one standard projection image of the object in which presumed suspect zones corresponding to radiological signs are represented by markers. The device comprises means for the production of a digital volume of markers in which 3D markers are created in order to represent presumed suspect zones of the object. It also comprises means of re-projection of the 3D markers in the standard projection image in order to confirm the presence of the markers or eliminate or add the markers of the projection image is necessary.

Abstract: In a method and apparatus for image processing an algorithm is used to detect radiological signals in a series of 3D data. The algorithm indicates the position of a radiological signs in a digital volume by means of markers. The algorithm has the potential to distinguish automatically between malignant elements and benign elements. The algorithm comprises a fuzzy logic approach to explain the ambiguities in the image. The algorithm is applied directly to the radiography projection images.

Abstract: A region of interest is selected in an input image, such as a digital or analog image form a mammography apparatus. Display parameters for the input image or a part thereof are determined as a function of the region of interest. The image or a part thereof is displayed using the determined parameters. Choosing display parameters as a function of the region of interest optimizes the display of the possible region of interest without any adjustment by the operator.