Class / Patent application number | Description | Number of patent applications / Date published |
378036000 | Holography or interferometry | 75 |
20090092227 | Interferometer for quantitative phase contrast imaging and tomography with an incoherent polychromatic x-ray source - An interferometer for X-rays, in particular hard X-rays, for obtaining quantitative phase contrast images, includes a standard polychromatic X-ray source, a diffractive optical beam splitter other than a Bragg crystal in transmission geometry, and a position-sensitive detector with spatially modulated detection sensitivity. | 04-09-2009 |
20100061508 | Radiation phase image radiographing apparatus - A radiation phase image radiographing apparatus, including a radiation emission unit having multiple radiation sources for emitting radiation onto a subject, the radiation sources being distributed such that radiation emitted from each of the radiation sources and transmitted through the subject forms a part of a projected image of the subject, a first diffraction grating configured to be exposed to the radiation emitted from the multiple radiation sources of the radiation emission unit and to produce a Talbot effect by the exposure, a second diffraction grating for diffracting the radiation diffracted by the first diffraction grating, and a radiation image detector for detecting the radiation diffracted by the second diffraction grating. | 03-11-2010 |
20100260315 | SOURCE GRATING FOR TALBOT-LAU-TYPE INTERFEROMETER - A source grating for a Talbot-Lau-type interferometer includes a plurality of channels having incident apertures provided on a side irradiated with X-rays and exit apertures provided on an opposite side of the side irradiated with the X-rays; the exit apertures of the channels have an aperture area smaller than an aperture area of the incident apertures; and the exit apertures of the channels are arranged so that interference fringes of Talbot self-images formed by X-rays exiting from the exit apertures of the adjacent channels are aligned with each other. | 10-14-2010 |
20100272230 | DETECTION SETUP FOR X-RAY PHASE CONTRAST IMAGING - The invention relates to a method and a device for generating phase contrast X-ray images of an object ( | 10-28-2010 |
20110051889 | X-RAY PHASE GRATING AND METHOD FOR PRODUCING THE SAME - An X-ray phase grating used for X-ray phase-contrast imaging based on Talbot interference includes a first substrate and a second substrate. The first substrate and the second substrate are combined so as to be shifted from each other by one half period. The first substrate has a first pattern in which first faces and second faces making an angle of α (where α≠0 and α≠90° with the first faces are periodically arranged. The second substrate has a second pattern in which third faces corresponding to the first faces and fourth faces corresponding to the second faces and making an angle of α with the third faces are periodically arranged. | 03-03-2011 |
20110182403 | X-RAY SHIELD GRATING, MANUFACTURING METHOD THEREFOR, AND X-RAY IMAGING APPARATUS - A two-dimensional X-ray shield grating which may be manufactured more easily and to a manufacturing method to provide therefor is provided. The method of manufacturing the X-ray shield grating includes: a first step of forming a plurality of columnar structures periodically arranged in two directions; and a second step of forming a film which surrounds at least side surfaces of the respective plurality of columnar structures, in which, in the second step, portions of the film formed on side surfaces of columnar structures which are adjacent to each other in the two directions among the plurality of columnar structures are connected to each other in the two directions, and in which the film is formed so that a columnar aperture is formed between columnar structures which are diagonally adjacent to each other with respect to the two directions among the plurality of columnar structures. | 07-28-2011 |
20110200168 | IMAGING APPARATUS AND IMAGING METHOD - An imaging apparatus analyzes a periodic pattern of a Moiré due to Talbot interference by the Fourier transform method and forms an image. The imaging apparatus includes a first grating having a structure that transmits light beams from a beam source to refract or diffract the light beams and forms a self image based on a first periodic pattern by the Talbot interference at a predetermined position; a second grating that absorbs part of the first periodic pattern and causes a Moiré to be generated based on a second periodic pattern when the second grating is arranged at a position at which the self image is formed. All cross sections of the Moiré with axes in differential directions of a wavefront for the analysis by the Fourier transform method have a two-dimensional periodic structure in which periods of patterns in the second periodic pattern are the same. | 08-18-2011 |
20110235775 | RADIATION IMAGING SYSTEM AND APPARATUS AND METHOD FOR DETECTING DEFECTIVE PIXEL - An X-ray imaging system includes an X-ray source, first and second absorption gratings, and an FPD. The first absorption grating passes X-ray emitted from the X-ray source to form a G1 image. The second absorption grating modulates intensity of the G1 image at each of relative positions to form two or more fringe images. The relative positions differ in phase with respect to a period pattern of the G1 image. The FPD detects two or more frames of image data of the fringe images. A defective pixel detector reads two or more frames of image data stored in a memory and obtains a characteristic value of an intensity modulated signal on a pixel-by-pixel basis based on the read image data. The defective pixel detector detects a defective pixel based on the characteristic value obtained. | 09-29-2011 |
20110243300 | DIFFRACTION GRATING AND ALIGNMENT METHOD THEREOF, AND RADIATION IMAGING SYSTEM - An X-ray imaging system includes first to third absorption gratings. Initially, the third absorption grating is disposed in a Z axis orthogonal to a detection surface of a FPD, and the position of the third absorption grating is adjusted in θx and θy directions based on a dose of X-rays having passed through the third absorption grating. Then, the first absorption grating is disposed in the Z axis so as to produce a moiré pattern. The position of the first absorption grating is adjusted in the θx and θy directions so that a frequency of the moiré pattern detected by the FPD becomes uniform. Then, the position of the first absorption grating is adjusted in a Z or θz direction so that the FPD loses the detection of the moiré pattern. After that, the second absorption grating is aligned in a like manner as the first absorption grating. | 10-06-2011 |
20110280368 | X-RAY IMAGING APPARATUS, X-RAY IMAGING METHOD, AND X-RAY IMAGING PROGRAM - An X-ray imaging apparatus includes a phase grating, an absorption grating, a detector, and an arithmetic unit. The arithmetic unit executes a Fourier transform step of performing Fourier transform for an intensity distribution of a Moiré acquired by the detector, and acquiring a spatial frequency spectrum. Also, the arithmetic unit executes a phase retrieval step of separating a spectrum corresponding to a carrier frequency from a spatial frequency spectrum acquired in the Fourier transform step, performing inverse Fourier transform for the separated spectrum, and acquiring a differential phase image. | 11-17-2011 |
20120020454 | Radiation imaging system and collimator unit - A collimator unit includes a filter set for regulating a spectrum of X-rays emitted from an X-ray source, and a source grating having plural X-ray shielding portions and X-ray transmitting portions. The X-ray shielding portions and X-ray transmitting portions extend in a y direction parallel to a rotational axis of a rotating anode of the X-ray source, and are alternately arranged in an x direction orthogonal to an optical axis direction (z direction) of the X-rays. The intensity of the X-rays is reduced in the y direction by a heel effect. However, further reduction in the intensity of the X-rays by vignetting does not occur in the y direction. Since the filter set is disposed upstream from the source grating in an application direction of the X-rays, the source grating forms arrayed narrow focuses of X-ray beams from the X-rays disturbed by a filter element. | 01-26-2012 |
20120236988 | X-RAY IMAGING APPARATUS - An X-ray imaging apparatus comprises a grating configured to form an interference pattern by diffracting X-rays from an X-ray source, a amplitude grating configured to partly shield X-rays forming the interference pattern, and an X-ray detector configured to detect an intensity distribution of X-rays from the amplitude grating. The amplitude grating is comprised of a central area and a peripheral area and the peripheral area shows an X-ray transmittance higher than the central area relative to X-rays perpendicularly entering the amplitude grating. | 09-20-2012 |
20120288055 | X-RAY HOLOGRAPHY LIGHT SOURCE ELEMENT AND X-RAY HOLOGRAPHY SYSTEM - An X-ray holography light source element divides an entering X-ray beam to emit two or more mutually coherent X-ray beams. The light source element includes an X-ray waveguide which has a core and a cladding. The core contains a plurality of substances different in a refractive-index real part and is a periodic structure body in which basic structures are periodically disposed; the cladding confines an X-ray to the core to be guided therethrough. The total reflection critical angle of the X-ray on the interface of the core and the cladding is larger than the Bragg angle corresponding to the periodicity of the basic structures of the core. A shield member provided with two or more opening portions for respectively emitting the two or more mutually coherent X-ray beams is disposed at the end portion at an emission side of the X-ray waveguide. | 11-15-2012 |
20130070893 | X-RAY IMAGING APPARATUS, X-RAY IMAGING METHOD, AND X-RAY IMAGING PROGRAM - An X-ray imaging apparatus includes a phase grating, an absorption grating, a detector, and an arithmetic unit. The arithmetic unit executes a Fourier transform step of performing Fourier transform for an intensity distribution of a Moiré acquired by the detector, and acquiring a spatial frequency spectrum. Also, the arithmetic unit executes a phase retrieval step of separating a spectrum corresponding to a carrier frequency from a spatial frequency spectrum acquired in the Fourier transform step, performing inverse Fourier transform for the separated spectrum, and acquiring a differential phase image. | 03-21-2013 |
20130108015 | X-RAY INTERFEROMETER | 05-02-2013 |
20130148780 | INCLINED PHASE GRATING STRUCTURES - Grating interferometer comprising inclined phase grating structures, method for increasing the definition of phase contrast images of interferometers or in applications which are based on the Talbot effect, using inclined phase grating structures, phase gratings wherein the grating structures are positioned at angles on the substrate of the phase grating, method for producing grating structures which are positioned at angles on the substrate of the phase grating, and corresponding uses. | 06-13-2013 |
20130163717 | IMAGING APPARATUS - An imaging apparatus includes a light source unit; a diffraction grating diffracting light from the light source unit; and a detector detecting light from the diffraction grating, wherein the light source unit includes first light-emitting parts emitting light forming a first interference pattern by being diffracted at the diffraction grating, and second light-emitting parts emitting light forming a second interference pattern by being diffracted at the diffraction grating, wherein the first and the second light-emitting parts are disposed so that at least part of the first and second interference pattern overlap and the positions of light regions in the first interference pattern differ from the positions of light regions in the second interference pattern, and wherein a combined pattern is formed by the first interference pattern and the second interference pattern. | 06-27-2013 |
20130177133 | RADIOLOGICAL IMAGE CAPTURING APPARATUS AND RADIOLOGICAL IMAGE CAPTURING SYSTEM - There is described a radiological image capturing apparatus, which makes it possible to obtain a good X ray image in which contrast of the peripheral portions are emphasized by employing the Talbot interferometer method and the Talbot-Lau interferometer method. The apparatus is provided with an X-ray tube, a multi-slit member, a first diffraction grating, a second diffraction grating and an X-ray detector. The second diffraction grating contacts the X-ray detector. A distance L between the multi-slit element and the first diffraction grating is set to be not less than 0.5 m, a distance Z | 07-11-2013 |
20130202081 | DIFFERENTIAL PHASE-CONTRAST IMAGING - The present invention relates to differential phase-contrast imaging, in particular to a structure of a diffraction grating, e.g. an analyzer grating and a phase grating, for X-ray differential phase-contrast imaging. In order to provide enhanced phase-gradient based image data, a diffraction grating ( | 08-08-2013 |
20130230135 | JOINT IMAGING APPARATUS - A joint imaging apparatus includes a subject table and a radiographic unit including a radiation generating section disposed above the subject table to irradiate a joint of a finger, and a detecting section disposed under the subject table to detect radiation passing through the joint. The subject table includes a base unit to fix the wrist, and a subject fixing unit to fix the joint to a predetermined position. The subject fixing unit includes a first fixing member to fix a part on the trunk side of the joint, and a second fixing member to fix a part on the side, opposite to the trunk side, of the joint. A position of the second fixing member is adjustable relative to that of the first fixing member. | 09-05-2013 |
20130279651 | Method for Manufacturing Metal Lattice, Metal Lattice Manufactured by the Method, and X-ray Imaging Device using the Metal Lattice - According to a method for manufacturing a metal grating structure of the present invention, in filling a concave portion formed in a silicon substrate ( | 10-24-2013 |
20130301795 | ANALYSIS METHOD, RADIATION IMAGING APPARATUS USING ANALYSIS METHOD, AND ANALYSIS PROGRAM FOR EXECUTING ANALYSIS METHOD - An analysis method for use in a radiation imaging apparatus employing intensity information of interference fringes of radiation rays that have passed through a detected object includes the steps of generating first phase information of the detected object wrapped into a range of 2π from the intensity information of the interference fringes; generating information on an absorption intensity gradient of the detected object from the intensity information of the interference fringes; generating a weighting function on the basis of an absolute value of a gradient in the information on the absorption intensity gradient; and generating second phase information by unwrapping the first phase information by using the weighting function. | 11-14-2013 |
20130308750 | RADIOGRAPHIC SYSTEM AND RADIOGRAPHIC IMAGE GENERATING METHOD - In a radiographic system and a radiographic image generating method that generate a phase contrast image and an absorption image of an subject, the absorption image in which density irregularity is removed or reduced is generated on the basis of a plurality of pieces of image data obtained for generating the phase contrast image. | 11-21-2013 |
20130308751 | DIFFERENTIAL PHASE-CONTRAST IMAGING WITH INCREASED DYNAMIC RANGE - The present invention relates to X-ray differential phase-contrast imaging. In order to enhance the information acquired by phase-contrast imaging, an analyzer grating ( | 11-21-2013 |
20140126690 | X-RAY IMAGING APPARATUS AND X-RAY IMAGING SYSTEM - An X-ray imaging apparatus includes an optical device configured to form a periodic pattern using X-rays radiated from an X-ray source, an alignment mark of the optical device, a first detector, a second detector, and a movement unit configured to change at least either a position of the optical device or an angle of the optical device on the basis of a result of detection performed by the second detector. The first detector detects X-rays that have passed through the optical device and a subject, and the second detector detects X-rays that have passed through the alignment mark. The movement unit includes a movement instruction section that instructs the optical device to move on the basis of the result of the detection performed by the second detector and movement sections that move the optical device on the basis of the instruction issued by the movement instruction section. | 05-08-2014 |
20140153692 | Combining Differential Images by Inverse Riesz Transformation - A method forms a representative image from a crossed grating fringe pattern interferogram of an object from an interferometer. The method determines a plurality of spectral lobes from the interferogram and selects from the plurality of determined lobes, two substantially orthogonal sidelobes. The selected sidelobes represent spatial differential phase information of the interferogram. The method applies an inverse Riesz transform to the spatial differential phase information of the selected sidelobes to form a transformed differential phase image, and forms from the transformed differential phase image, a representative image emphasising high frequency detail information of the object. | 06-05-2014 |
20140169522 | MEDICAL IMAGING SYSTEM - A medical imaging system includes an X-ray imaging apparatus and an image processor. The X-ray imaging apparatus is provided with a Talbot or Talbot-Lau interferometer and includes an X-ray source, an X-ray detector, and a subject table. The image processor generates a differential phase image, and optionally, one or both of an X-ray absorption image and a small-angle scattering image of the subject on the basis of the image signal of the subject. The image processor specifies a location of an edge of a bone in the joint on the basis of at least one of the generated images; and detects an edge of a cartilage in the joint in the differential phase image on the basis of the specified location of the bone edge to quantitatively measure a feature of the cartilage. | 06-19-2014 |
20140177790 | Non-linear solution for 2D phase shifting - Disclosed is a method of reconstructing a representative detailed phase image from a set of fringe pattern interferogram images of an object. The images are captured by an x-ray interferometer having a crossed diffraction grating. A set of captured fringe pattern interferogram images from the x-ray interferometer are provided, the set comprising no more than eight captured fringe pattern interferogram images. The method determines an estimate of an absorption parameter (a), two-dimensional amplitude modulation parameters (m | 06-26-2014 |
20140185746 | SPECTRAL GRATING-BASED DIFFERENTIAL PHASE CONTRAST SYSTEM FOR MEDICAL RADIOGRAPHIC IMAGING - Embodiments of methods and apparatus are disclosed for obtaining a phase-contrast digital radiographic imaging system and methods for same that can include an x-ray source for radiographic imaging; a beam shaping assembly including a collimator and a source grating, an x-ray grating interferometer including a phase grating, and an analyzer grating; and an x-ray detector, where a single arrangement of the beam shaping assembly, the x-ray grating interferometer and a position of the detector is configured to provide spectral information (e.g. at least two images obtained at different relative beam energies). | 07-03-2014 |
20140198895 | MEDICAL IMAGING SYSTEM - A medical imaging system includes a radiographing apparatus and an image processing apparatus. The radiographing apparatus is provided with a Talbot or Talbot-Lau interferometer and includes an X-ray source, an X-ray detector, and a subject table. The image processing apparatus generates at least one of an X-ray absorption image, a differential phase image, and a small-angle scattering image of the subject using an image signal and a background signal obtained through subject radiographing and background radiographing, respectively. The background radiographing is performed with a member held instead of the subject. The member has a material and/or thickness to create change in energy spectrum of X-rays equivalent to change in energy spectrum of X-rays created by the subject. | 07-17-2014 |
20140233697 | X-RAY IMAGING - A method of aligning masks for phase imaging or phase contrast imaging in X-ray apparatus using a pixel-type X-ray detector makes use of non-idealities of all real detectors. A mask may be provided before the sample to generate beams, adjacent to the pixels of the detector or both. The method includes moving the mask into a plurality of translational position increments and identifying the increment for which the intensity has a maximum or minimum. The identified value of the increment may vary over the pixels of the detector. Alignment positions are selected in which steps in a plot of the increment over the area of the detector are minimised and/or aligned with the rows and columns of pixels. | 08-21-2014 |
20140241493 | Metal Lattice Production Method, Metal Lattice, X-Ray Imaging Device, and Intermediate Product for Metal Lattice - Method for manufacturing a metal grating structure, wherein, after a concave part having an insulating layer on an inner surface thereof is formed in a silicon substrate, a portion of the insulating layer formed on a bottom part of the concave part is removed, and the silicon substrate at the bottom part of the concave part is etched to increase the surface area of the bottom part of the concave part as compared with a state before the etching, followed by filling the concave part with metal by an electroforming method. | 08-28-2014 |
20140270060 | X-RAY TALBOT INTERFEROMETER AND X-RAY TALBOT IMAGING SYSTEM - An X-ray Talbot interferometer includes a source grating configured to spatially split X-rays emitted from an X-ray source, a diffraction grating configured to form an interference pattern with the X-rays from the source grating, and an X-ray detector configured to detect the X-rays from the diffraction grating. The X-ray Talbot interferometer further includes an angle varying unit configured to vary an angle formed by an optical axis, which is the center of a flux of the X-rays from the X-ray source, and the source grating. The angle varying unit varies the angle formed by the optical axis and the source grating from a first angle to a second angle. The X-ray detector detects the X-rays at least when the optical axis and the source grating form the first angle and when the optical axis and the source grating form the second angle. | 09-18-2014 |
20140270061 | X-RAY TALBOT INTERFEROMETER AND X-RAY IMAGING SYSTEM INCLUDING TALBOT INTERFEROMETER - An X-ray Talbot interferometer includes a first grating configured to diffract X-rays from an X-ray source and form an interference pattern, a second grating configured to block a portion of X-rays that form the interference pattern, and a detector configured to detect X-rays from the second grating. An inspection object is disposed between the X-ray source and the second grating. The second grating includes a first shield grating portion in which a shield portion and a transmissive portion are arranged periodically at a first period and a second shield grating portion. The first period is expressed as ps×n×Ls/(Ls+Lf), where ps denotes a size of pixels that the detector has, n denotes a positive integer, Ls denotes a distance from the X-ray source to the first shield grating portion, and Lf denotes a distance from the first shield grating portion to the detector. | 09-18-2014 |
20140328457 | DIFFERENTIAL PHASE CONTRAST X-RAY IMAGING SYSTEM AND COMPONENTS - A differential phase contrast X-ray imaging system includes an X-ray illumination system, a beam splitter arranged in an optical path of the X-ray illumination system, and a detection system arranged in an optical path to detect X-rays after passing through the beam splitter. | 11-06-2014 |
20140341334 | COMPUTATION APPARATUS, PROGRAM, AND IMAGE PICKUP SYSTEM - A computation apparatus that calculates subject information by using subject data, includes a calculation unit that calculates spatial distributions of a first-order phase value and a first-order measurement target value by using the subject data, a calculation unit that calculates an error correction function including the first-order phase value as a variable by using information of the spatial distribution of the first-order measurement target value and the spatial distribution of the first-order phase value, and a calculation unit that calculates information of a spatial distribution of a second-order measurement target value corresponding to a spatial distribution obtained by correcting the spatial distribution of the first-order measurement target value by using the error correction function, the information of the spatial distribution of the first-order phase value, and the information of the spatial distribution of the first-order measurement target value. | 11-20-2014 |
20140341335 | COMPUTATION APPARATUS, PROGRAM, AND IMAGE PICKUP SYSTEM - A computation apparatus that calculates information of a subject includes: a calculation unit configured to calculate a spatial distribution of a first first-order phase value, a spatial distribution of a second first-order phase value, and a spatial distribution of a first-order measurement target value, by using the subject data; a calculation unit configured to calculate an error correction function including the first first-order phase value and the second first-order phase value as variables, by using information of the spatial distribution of the first first-order phase value, information of the spatial distribution of the second first-order phase value, and information of the spatial distribution of the first-order measurement target value; and a calculation unit configured to calculate information of a spatial distribution of a second-order measurement target value, corresponding to a spatial distribution obtained by correcting the spatial distribution of the first-order measurement target value. | 11-20-2014 |
20150023465 | SOURCE GRATING, INTERFEROMETER, AND OBJECT INFORMATION ACQUISITION SYSTEM - A source grating includes a first sub-source grating, where first transmitting portions which transmit X-rays, and first shielding portions which shield X-rays, are alternately arranged in a first direction; and a second sub-source grating, where second transmitting portions which transmit X-rays, and second shielding portions which shield X-rays, are alternately arranged in a second direction orthogonal to the first direction. The first sub-source grating is curved so that two positions in the curve align in the first direction. The second sub-source grating is curved so that two positions in the curve align in the second direction. | 01-22-2015 |
20150036795 | MULTI-DIRECTIONAL PHASE CONTRAST X-RAY IMAGING - The present invention relates to phase contrast X-ray imaging of an object. In order to provide phase contrast information in more than one direction, an X-ray imaging system is provided that comprises an X-ray source ( | 02-05-2015 |
20150043710 | RADIOLOGICAL IMAGE CAPTURING APPARATUS AND RADIOLOGICAL IMAGE CAPTURING SYSTEM - There is described a radiological image capturing apparatus, which makes it possible to obtain a good X ray image in which contrast of the peripheral portions are emphasized by employing the Talbot interferometer method and the Talbot-Lau interferometer method. The apparatus is provided with an X-ray tube, a multi-slit member, a first diffraction grating, a second diffraction grating and an X-ray detector. The second diffraction grating contacts the X-ray detector. A distance L between the multi-slit element and the first diffraction grating is set to be not less than 0.5 m, a distance Z | 02-12-2015 |
20150055743 | APPARATUS AND METHOD FOR X-RAY PHASE CONTRAST IMAGING - An x-ray phase contrast imaging apparatus and method of operating the same. The apparatus passes x-rays generated by an x-ray source through, in succession, a source grating, an object of interest, a phase grating, and an analyzer grating. The x-ray source, the source grating, the phase grating, and the analyzer grating move as a single entity relative to an object of interest. The phase grating and the analyzer grating remain in fixed relative location and fixed relative orientation with respect to one another. The detected x-rays are converted to a time sequence of electrical signals. In some cases, the apparatus is controlled, and the electrical signals are analyzed by, by a general purpose programmable computer provided with instructions recorded on a machine readable medium. One or more x-ray phase contrast images of the object of interest are generated, and can be recorded or displayed. | 02-26-2015 |
20150055744 | X-RAY DEVICE - An embodiment of the invention relates to an X-ray device, more particularly for phase-contrast imaging in the medical sector. In at least one embodiment, the X-ray device includes an X-ray radiation source, a coherence grid, a phase grid and an X-ray detector from a number of pixels arranged in a matrix, the pixels including a lens grid. | 02-26-2015 |
20150055745 | Phase Contrast Imaging Using Patterned Illumination/Detector and Phase Mask - A modified phase shifting mask is used to improve performance over traditional Zernike phase contrast imaging. The configurations can lead to an improved imaging methodology potentially with reduced artifacts and more than one order of magnitude gain in photon efficiency, in some examples. Moreover, it can be used to yield a direct representation of the sample's phase contrast information without the need for additional specialized post-acquisition image analysis. The approach can be applied to both wide-field and scanning configurations by using a phase mask including a pattern of phase elements and an illumination mask, having a pattern of holes, for example, that corresponds to a pattern of the phase mask. | 02-26-2015 |
20150071402 | X-RAY IMAGING SYSTEM - An X-ray imaging system includes: a micro X-ray source array formation part configured to form a micro X-ray source array by partially shielding an X-ray emitted from an X-ray source; and an X-ray detector configured to detect an X-ray transmitted through a test object. The micro X-ray source array formation part includes a plurality of gratings disposed between the X-ray source and the X-ray detector. A ratio of X-rays transmitted through all of the plurality of gratings to X-rays generated from the X-ray source varies depending on a position of an X-ray generating point on the X-ray source, and the micro X-ray source array formation part forms a micro X-ray source array of a pattern in accordance with the variation of the ratio of the transmitted X-rays. | 03-12-2015 |
20150071403 | RADIOGRAPHIC SYSTEM AND RADIOGRAPHIC IMAGE GENERATING METHOD - In a radiographic system and a radiographic image generating method that generate a phase contrast image and an absorption image of an subject, the absorption image in which density irregularity is removed or reduced is generated on the basis of a plurality of pieces of image data obtained for generating the phase contrast image. | 03-12-2015 |
20150092914 | METHOD FOR EXAMINING AN OBJECT USING AN X-RAY RECORDING SYSTEM FOR PHASE CONTRAST IMAGING WITH STOCHASTIC PHASE SCANNING - A method, for examining an object using an X-ray recording system, includes during an X-ray image recording, moving components relative to one another with the lateral displacement by displacement distances. The method includes generating the X-ray image recording during the displacement from n partial images, so that the total exposure time of the X-ray image recording is made up from a sum of partial exposure times. In each of the partial images, the intensity is determined in each pixel. The position of the second component relative to the first component is determined for each recording of the partial images. Finally, the image information is determined from the partial images and the displacements. | 04-02-2015 |
20150092915 | METHOD FOR EXAMINING AN OBJECT USING AN X-RAY RECORDING SYSTEM FOR PHASE CONTRAST IMAGING WITH DISPLACEMENT MEASUREMENT - A method, for examining an object using an X-ray recording system, includes aligning the object in the X-ray beam and the X-ray recording system with one another such that regions in the X-ray beam are uncovered for measurement of a free field. During an X-ray image recording, the components are moved relative to one another with a lateral displacement. In a position of the relative lateral displacement of the components, a reference image containing free fields is recorded. The X-ray image recording is generated from partial images during the displacement and the position of the second component relative to the first component is determined for each partial recording such that the displacement distances of the displacements and the reference phases are calculated from a selected set of pixels and the measured intensity values thereof. Finally, the image information is determined from the partial images, the displacements and the reference phases. | 04-02-2015 |
20150092916 | MATERIAL DIFFERENTIATION WITH PHASE CONTRAST IMAGING - A method and system to determine material composition of an object comprises capturing a series of digital radiographic images of the object using a single exposure energy level. An intensity of the captured images is determined as well as phase shift differences. A difference in material composition of the object may be determined based on a combination of the determined intensity and the modulated phase shifts of the captured images. | 04-02-2015 |
20150117598 | GRATING-BASED DIFFERENTIAL PHASE CONTRAST IMAGING - An imaging system ( | 04-30-2015 |
20150117599 | X-RAY INTERFEROMETRIC IMAGING SYSTEM - We disclose an x-ray interferometric imaging system in which the x-ray source comprises a target having a plurality of structured coherent sub-sources of x-rays embedded in a thermally conducting substrate. The system additionally comprises a beam-splitting grating G | 04-30-2015 |
20150131777 | MEDICAL IMAGING SYSTEM AND MEDICAL IMAGE PROCESSING APPARATUS - A medical imaging system creates three kinds of reconstructed images of a diagnosis target site in a subject through X-ray imaging of the diagnosis target site with a Talbot or Talbot-Lau imaging apparatus, the three kinds of reconstructed images being an absorption image, a differential phase image, and a small-angle scattering image. The medical imaging system includes: an input unit to receive an input of diagnosis target information for specifying the diagnosis target site, or the diagnosis target site and a disease to be diagnosed in the diagnosis target site; and a control unit to create a combined image of two kinds of reconstructed images among the three kinds of reconstructed images on the basis of the diagnosis target information input through the input unit, and to control a displaying unit to display the combined image. | 05-14-2015 |
20150139385 | ROTATIONAL PHASE UNWRAPPING - A phase unwrapping method for image demodulation comprises receiving a plurality of images of a fringe pattern captured by rotating the fringe pattern by a predetermined rotation angle. The method estimates a first wrapped phase value for a portion of a first image of the plurality of images and a second wrapped phase value for a corresponding portion of a second image, and establishes a first plurality of elements associated with the first wrapped phase value. For a candidate element from the first plurality of elements, the method determines a constraining element associated with the candidate element using the second wrapped phase value, where the association is established using the candidate element and the predetermined rotation angle, and unwraps the phase for the portion of at least one of the first and second images using the candidate element based on the determined constraining element. | 05-21-2015 |
20150294749 | Interferometric dynamic-grating imaging method, diffraction grating and imaging apparatus - The present invention relates to a method for producing an image of a target using radiation and a diffraction grating and apparatus for x-ray imaging. The method comprises directing a beam of radiation to the target to produce a modified beam through interaction with the target, directing the modified beam to an diffraction grating to produce an interference pattern, detecting the interference pattern using a detector, and forming an image of the target using the interference pattern measured. According to the invention, the diffraction grating is modified n the plane of the grating during the imaging so that at least two interference patterns are detected using the detector different configurations of the diffraction grating. Further, the image of the target using the at least two interference patterns measured. The invention provides a simple configuration, less radiation exposure and/or better image quality then conventional imaging methods. | 10-15-2015 |
20150308967 | OBJECT INFORMATION OBTAINING APPARATUS, PROGRAM, AND IMAGING SYSTEM - The present invention relates to an object information obtaining apparatus that obtains information about a phase image of an object using information about an interference pattern produced by a shearing interferometer, the interference pattern being formed by an electromagnetic wave or electron beam passed through or reflected by the object. The apparatus includes a first obtaining unit configured to obtain information about a differential phase image of the object using the information about the interference pattern, a second obtaining unit configured to obtain information about contrast in each region of the interference pattern, a third obtaining unit configured to weight the information about the differential phase image using the information about the contrast to obtain information about a weighted differential phase image, and a fourth obtaining unit configured to integrate the information about the weighted differential phase image to obtain the information about the phase image of the object. | 10-29-2015 |
20150316494 | X-RAY SHIELD GRATING AND X-RAY TALBOT INTERFEROMETER INCLUDING X-RAY SHIELD GRATING - An X-ray shield grating includes a substrate on which a plurality of recessed portions are arranged, and metal that is arranged in each of the recessed portions. The substrate includes a bent region that is bent in an arrangement direction in which the plurality of recessed portions are arranged. A radius of curvature of the bent region is 200 millimeters or less. In the bent region, a maximum value of a width of a region sandwiched between two adjacent recessed portions of the plurality of recessed portions and a width of the substrate in an end portion of the bent region are less than or equal to three times a minimum value of the width of the region sandwiched between the two adjacent recessed portions. | 11-05-2015 |
20150323478 | SYSTEM AND METHOD FOR PHASE-CONTRAST X-RAY IMAGING - A differential phase contrast X-ray imaging system includes an X-ray illumination system, a beam splitter arranged in a radiation path of the X-ray illumination system, and a detection system arranged in a radiation path to detect X-rays after passing through the beam splitter. | 11-12-2015 |
20150362444 | PHASE INFORMATION ACQUISITION APPARATUS AND IMAGING SYSTEM - A phase information acquisition apparatus that acquires phase information from differential phase information on an object, includes: a differential phase acquisition unit that acquires differential phase information with respect to a plurality of directions; a weight setting unit that individually sets weights for the differential phase information of the respective directions; and a phase acquisition unit that determines phase information, using an equation that includes a weighted combination of the differential phase information of the respective directions with the weights of the respective directions set by the weight setting unit. | 12-17-2015 |
20160035450 | TALBOT INTERFEROMETER, TALBOT INTERFERENCE SYSTEM, AND FRINGE SCANNING METHOD - In a Talbot interferometer including a diffractive grating which forms a first intensity distribution, a shield grating which forms a second intensity distribution, a detector which acquires information on the intensity distributions, and a moving unit which moves the first intensity distribution or the shield grating, fringe scanning in the x-axis and y-axis directions is performed in response to a change in relative positions of the first intensity distribution and the shield grating in the respective directions, and the detection before or after a change in the relative positions in the respective directions. The number of movements of the first intensity distribution or the shield grating with the fringe scanning in the directions is lower than Dx×(Dy+1)−2, where Dx and Dy are the numbers of detections with the fringe scanning in the respective directions and are integers equal to or higher than 3. | 02-04-2016 |
20160038107 | METHOD AND APPARATUS FOR FABRICATION AND TUNING OF GRATING-BASED DIFFERENTIAL PHASE CONTRAST IMAGING SYSTEM - A method for assembling a phase contrast x-ray imaging system includes fabricating a phase grating and an absorption grating according to a preselected pitch of the gratings. The actual obtained pitches are measured and a source grating is then fabricated according to a desired design point of the imaging system. | 02-11-2016 |
20160064109 | X-RAY IMAGING APPARATUS - An X-ray imaging apparatus includes: a plurality of gratings; a detector which detects X-rays that have been emitted from an X-ray generator and have been transmitted through the plurality of gratings; a first support member which supports the plurality of gratings and the detector; a second support member which supports the X-ray generator and the first support member; and a first vibration-proof member which is disposed between the first support member and the second support member. A natural frequency of the first vibration-proof member in respect of at least vibration in a direction perpendicular to the optical axis of the X-rays is lower than 2 | 03-03-2016 |
20160066873 | PHASE-CONTRAST X-RAY IMAGING DEVICE - A phase-contrast x-ray imaging device is particularly suited for the medical field. The device includes an x-ray source for generating an x-radiation field and an x-ray detector having a one-dimensional or two-dimensional arrangement of pixels. A phase-contrast differential amplifier is positioned between the x-ray source and the x-ray detector. The phase-contrast differential amplifier amplifies spatial phase differences in the x-radiation field during operation. | 03-10-2016 |
20160073984 | RADIOLOGICAL IMAGE CAPTURING APPARATUS AND RADIOLOGICAL IMAGE CAPTURING SYSTEM - There is described a radiological image capturing apparatus, which makes it possible to obtain a good X ray image in which contrast of the peripheral portions are emphasized by employing the Talbot interferometer method and the Talbot-Lau interferometer method. The apparatus is provided with an X-ray tube, a multi-slit member, a first diffraction grating, a second diffraction grating and an X-ray detector. The second diffraction grating contacts the X-ray detector. A distance L between the multi-slit element and the first diffraction grating is set to be not less than 0.5 m, a distance Z | 03-17-2016 |
20160095562 | MATERIAL DECOMPOSITION TECHNIQUE USING X-RAY PHASE CONTRAST IMAGING SYSTEM - A phase contrast x-ray imaging system generates an absorption image and a phase shift image of an object under study. The absorption image represents a measurement of the imaged object's attenuation of radiographic energy, and the phase shift image represents a measurement of the imaged object's phase shifting of the radiographic waves passing through the object. The two images may be used to improve soft tissue discrimination in radiographic imaging. | 04-07-2016 |
20160109387 | IMAGE PROCESSING METHOD, SYSTEM AND APPARATUS - An image processing method is disclosed. An impulse response of a source of an interferometer system is received. An impulse response of a detector of the interferometer system is received. The source impulse response is determined independently of the detector impulse response. An image of an object generated by a grating of the interferometer system is captured, the image is captured by the detector of the interferometer system. The captured image is processed using the determined detector impulse response to attenuate artefacts introduced by the detector. The processed image is demodulated to produce a demodulated image, artefacts introduced by the source being present in the demodulated image. The demodulated image is processed using the source impulse response to reduce the artefacts in the demodulated image introduced by the source. | 04-21-2016 |
20160113610 | Device and method for x-ray phase contrast imaging - A device for slot scanning phase contrast x-ray imaging, includes an x-ray emitter, a plurality of x-ray gratings, a patient couch, and an x-ray detector. Position marker elements are arranged and configured in the beam path of the x-ray emitter such that the position marker elements are visible in an x-ray image. In the x-ray image, a relative position of an object on the patient couch in relation to an x-ray beam fan of the x-ray emitter may be established from a location and a distance of the position marker elements from one another. | 04-28-2016 |
20160113611 | QUANTITATIVE X-RAY RADIOLOGY USING THE ABSORPTION AND SCATTERING INFORMATION - A quantitative radiographic method uses X-ray imaging. The method uses a ratio of the absorption signal and the (small-angle) scattering signal (or vice-versa) of the object as a signature for the materials. The ratio image (dubbed R image) is independent from the thickness of the object in a wide sense, and therefore can be used to discriminate materials in a radiographic approach. This can be applied to imaging systems, which can record these two signals from the underlying object (for instance, an X-ray grating interferometer). Possible applications could be in material science, non-destructive testing and medical imaging. Specifically, the method can be used to estimate a volumetric breast density. The use of the R image and the corresponding algorithm are also presented hereafter. | 04-28-2016 |
20160128665 | CORRECTION IN SLIT-SCANNING PHASE CONTRAST IMAGING - The present invention relates to calibration in X-ray phase contrast imaging. In order to remove the disturbance due to individual gain factors, a calibration filter grating ( | 05-12-2016 |
20160135769 | X-RAY PHASE-CONTRAST IMAGING - Systems and methods for X-ray phase-contrast imaging (PCI) are provided. A quasi-periodic phase grating can be positioned between an object being imaged and a detector. An analyzer grating can be disposed between the phase grating and the detector. Second-order approximation models for X-ray phase retrieval using paraxial Fresnel-Kirchhoff diffraction theory are also provided. An iterative method can be used to reconstruct a phase-contrast image or a dark-field image. | 05-19-2016 |
20160146744 | CODED-APERTURE X-RAY IMAGING - A method of X-ray imaging includes passing an X-ray beam through a pre-sample mask | 05-26-2016 |
20160163408 | MICROSTRUCTURE MANUFACTURING METHOD - A microstructure manufacturing method includes forming a first insulating film on an Si substrate, exposing an Si surface by removing a part of the first insulating film, forming a recessed portion by etching the Si substrate from the exposed Si surface, forming a second insulating film on a sidewall and a bottom of the recessed portion, forming an Si exposed surface by removing at least a part of the second insulating film formed on the bottom of the recessed portion, and filling the recessed portion with a metal from the Si exposed surface by electrolytic plating. | 06-09-2016 |
20160172148 | ANODE FOR AN X-RAY TUBE OF A DIFFERENTIAL PHASE CONTRAST IMAGING APPARATUS | 06-16-2016 |
20160252470 | NON-DESTRUCTIVE INSPECTION DEVICE | 09-01-2016 |
20160253785 | MEDICAL IMAGE SYSTEM AND IMAGE PROCESSING DEVICE | 09-01-2016 |
20160374631 | X-RAY TALBOT IMAGING DEVICE - An X-ray Talbot imaging device includes: a plurality of gratings; a subject platform configured to hold a subject; a radiation generator configured to emit radiation; a radiation flat panel detector configured to capture a moire image; and a holding unit configured to hold a knee joint section on the subject platform, wherein the holding unit includes: a first holding section configured to hold a proximal side of the joint section; a second holding section configured to hold a distal side of the joint section; a pivot fixing mechanism capable of pivoting the first and second holding sections relative to each other and capable of fixing a relative pivot angle between the first and second holding sections; and an angle adjustment mechanism configured to change an angle of the knee joint section with respect to an emission direction of radiation emitted from the radiation generator. | 12-29-2016 |
20160377559 | X-RAY INTERFEROMETER - Embodiments relate to an X-ray interferometer for imaging an object comprising: a phase grating for effecting in correspondence with the phase grating geometry a phase shift to at least a part of X-ray incident onto the phase grating; and an absorption grating for effecting in correspondence with the absorption grating geometry absorption to at least a part of X-ray incident onto the absorption grating. The grating period of the phase grating, and the grating period of the absorption grating may be dimensioned such that a detector for X-rays can be placed at a relatively large distance away from the absorption grating such the phase contrast sensitivity of the image of the object detected by the detector remains substantially unaffected. | 12-29-2016 |