Patent application number | Description | Published |
20080205738 | Method and Apparatus for Calibration and Correction of Gray Levels in Images - 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. Each image of an image sequence of the object under observation is corrected, comprising zones of observation having different gray levels by subtracting from the current image the variation of one gray level relative to the first image of the object, the subtraction being a function of the gray level considered from each zone of observation. | 08-28-2008 |
20090080765 | SYSTEM AND METHOD TO GENERATE A SELECTED VISUALIZATION OF A RADIOLOGICAL IMAGE OF AN IMAGED SUBJECT - 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. | 03-26-2009 |
20090135996 | MAMMOGRAPHY DEVICES - 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. | 05-28-2009 |
20090164541 | Procedure for deriving a three-dimensional digital mask starting from a series of two-dimensional masks, plus a device for doing this - 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 | 06-25-2009 |
20090208085 | METHOD FOR PROCESSING IMAGES OBTAINED BY TOMOSYNTHESIS AND ASSOCIATED DEVICE - 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. | 08-20-2009 |
20110019891 | MEDICAL IMAGING PROCESS FOR TRIPLE-ENERGY MODELING, AND DEVICE FOR IMPLEMENTING SUCH A PROCESS - 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. | 01-27-2011 |
20110261927 | METHOD AND APPARATUS FOR TOMOSYNTHESIS PROJECTION IMAGING FOR DETECTION OF RADIOLOGICAL SIGNS - A method of image processing in a radiological apparatus includes reconstructing a 3D image of a body from a set of radiography projection images, locating structures presumed to be representative of 3D radiological signs within the 3D image, determining a set of 2D candidate particles corresponding to projections of the presumed 3D radiological signs, assigning, through a fuzzy logic description, to the 2D candidate particles a degree of membership in 2D membership classes of a set of membership classes, each membership class being relative to a type of radiological sign, considering a 2D fuzzy particle being formed by the set of the 2D candidate particles and by their respective degrees of membership in a class, making an aggregate of the 2D fuzzy particles to obtain 3D fuzzy particles in a digital volume, and determining a degree of confidence for each 3D radiological sign from the 3D fuzzy particles. | 10-27-2011 |
20110270270 | METHOD FOR DETERMINING AN INSERTION TRAJECTORY OF A TOOL IN A DEFORMABLE TISSULAR MATRIX AND ROBOTIC SYSTEM EXECUTING THE METHOD - A method for determining an insertion trajectory of a tool for reaching a moving target object prior to its insertion into a tissular matrix is provided, the method comprising: acquiring images of the tissular matrix; constructing a three-dimensional representation of the tissular matrix; determining coordinates of the initial position of the target object and of the obstacles; determining at least one potential trajectory of the tool from the coordinates of the obstacles of the tissular matrix and of the initial position of the target object; simulating insertion of the tool in the tissular matrix to determine displacement of the target object within the tissular matrix during insertion of the tool up to the initial position of the target object along the potential trajectory; determining a new position of the target object based on the determined displacement; and determining the insertion trajectory for the new position of the target object. | 11-03-2011 |
20120134466 | GALACTOGRAPHY PROCESS AND MAMMOGRAPH - A galactography process in a mammograph for characterizing galactophorous ducts of a breast of a patient in which a contrast product has been previously injected is provided. The process comprises: emitting X-rays to the breast of a patient; acquiring at least one first mammographic image with X-rays having a first energy; acquiring at least one second mammographic image with X-rays having a second energy; and processing the at least one first image and the at least one second image to produce an image of the concentration of the contrast product in the breast, wherein the first energy is different than the second energy. | 05-31-2012 |
20120207283 | TEST PHANTOM FOR TOMOGRAPHIC IMAGING AND NOTABLY FOR BREAST TOMOSYNTHESIS - A test phantom for tomographic imaging, the phantom comprising an assembly of elementary structures defining a 3D mesh, wherein each elementary structure comprises a chief constituent material corresponding to an X-ray attenuation simulating a glandularity, wherein the elementary structures are in at least two types of chief constituent materials corresponding to different X-ray attenuations. | 08-16-2012 |
20130044861 | METHOD FOR ACQUIRING MORPHOLOGY OF A BREAST - An imaging method performed by a device comprising an X-ray emitting source, a receiver positioned facing the source, and a support on which a subject or organ to be imaged is positioned, the method comprises defining a first set of orientations of the source and a second set of orientations of the source, and acquiring images at the defined orientations of the source, wherein if the first set of orientations comprises an orientation that the second set of orientations does not comprise, only one image is acquired at the orientation, and if both the first set of orientations and the second set of orientations comprise the same orientation, at least two images are acquired at distinct acquisition parameters at the orientation. | 02-21-2013 |
20150023476 | COMPACT MECHANISM FOR MOVING A COMPRESSION PADDLE - A mammography or tomosynthesis apparatus, comprising a mechanism configured to move a paddle, relative to a detector platform fixed to a main body of the apparatus, to compress a patient's breast against the detector platform to form a surface. The mechanism comprises a post that is mobile relative to the detector platform and/or to the body and configured so that maximum extension of the post relative to the surface follows the movements of the paddle relative to the detector platform. | 01-22-2015 |