Patent application number | Description | Published |
20080224042 | RADIATION IMAGE DETECTOR - A radiation image detector includes: a photoconductive layer that generates electric charges when irradiated by recording electromagnetic waves which have passed through an electrode layer; and detecting electrodes, for detecting signals corresponding to the electric charges generated in the photoconductive layer. The radiation image detector further includes: dielectrics that cover the edges of the detecting electrodes, the edges being the side surfaces and portions of surfaces continuous with the side surfaces of the detecting electrodes, that face the photoconductive layer; and a charge injection preventing layer, which is a conductor with respect to electric charges of the same polarity as the electric charges accumulated during recording of the image information, and an insulator with respect to electric charges of the opposite polarity from the accumulated electric charges, provided to cover at least the surfaces of the detecting electrodes that face the photoconductive layer which are not covered by the dielectric. | 09-18-2008 |
20090057563 | RADIATION IMAGE DETECTOR - Edge portions of detection electrodes, such as a first linear electrode and a second linear electrode, that include the side surfaces of the detection electrodes and parts of surfaces of the detection electrodes, the surfaces continuing from the side surfaces and facing a photoconductive layer for recording, are covered with dielectrics. Further, surfaces of the detection electrodes and the dielectrics are coated with an anti-crystallization layer to prevent crystallization of a photoconductive layer for readout. At this time, the surfaces of the electrodes are smoothly covered with the dielectrics at angles θ of contact of 5 to 60 degrees so that no bump is present, thereby preventing generation of a crack in the anti-crystallization layer on the dielectrics and the electrodes. Accordingly, crystallization of the photoconductive layer for readout, which is induced by injection of charges from the edge portions of the detection electrodes or the like, is prevented. | 03-05-2009 |
20120099706 | GRID FOR RADIOGRAPHY AND MANUFACTURING METHOD THEREOF, AND RADIATION IMAGING SYSTEM - In an X-ray imaging system, first and second grids are disposed between an X-ray source and an X-ray image detector, and produce fringe images. From the fringe images, phase change information of X-rays is obtained. The phase change information provides contrast for an X-ray image. The first and second grids have similar configuration. Each grid is constituted of a grid layer and a support member. The grid layer includes X-ray absorbing portions and X-ray transparent portions arranged alternately in one direction. Each X-ray transparent portion contains hollow space having air trapped therein, for the purpose of reducing an X-ray absorption loss. | 04-26-2012 |
20120134463 | RADIATION TUBE AND RADIATION IMAGING SYSTEM - An X-ray tube has a cathode, a rotating anode, and a case for enclosing the cathode and the rotating anode. The rotating anode generates X-rays due to emission of electron beams from the cathode. The case includes a vacuum envelope for enclosing the cathode and the rotating anode, and a housing for enclosing the vacuum envelope. Inside of the vacuum envelope is maintained vacuum. The vacuum envelope has an X-ray passing portion for passing the X-rays therethrough. The housing is provided with a radiation window for radiating the X-rays, passed through the X-ray passing portion, to the outside of the case. The radiation window includes an opening and a multi-slit arranged in the opening. The multi-slit partly shields the X-rays, generated by the rotating anode, to form a plurality of virtual linear light sources. | 05-31-2012 |
20120134472 | GRID FOR RADIOGRAPHY AND MANUFACTURING METHOD THEREOF, AND RADIATION IMAGING SYSTEM - In a manufacturing process of a second grid, an X-ray absorbing layer is formed on a top surface of a strip of X-ray transparent sheet during conveyance, and a buffer layer is formed on a rear surface thereof. After that, the X-ray transparent sheet is wound into a roll so as to expose the X-ray absorbing layer to outside. Thus, the X-ray transparent sheet and the X-ray absorbing layer are laminated with being bonded with the buffer layer. The roll of layer laminated structure is sliced in its radial direction into a layer laminated sheet, which has the buffer layer, the X-ray transparent sheet, and the X-ray absorbing layer laminated in layers. After polishing sliced surfaces of the layer laminated sheet, the layer laminated sheet is pressed by a pressing device, so the second grid is curved into an approximately cylindrical shape. | 05-31-2012 |
20120148029 | GRID FOR USE IN RADIATION IMAGING, METHOD FOR PRODUCING THE SAME, AND RADIATION IMAGING SYSTEM - First and second grids are arranged between an X-ray source and an X-ray image detector. The first and second grids have the similar configuration except for width, pitch, and thickness of X-ray absorbing sections. The first grid is composed of subdivision grids arranged with substantially no space between each other on a flat surface of a substrate made of glass, for example. Each subdivision grid has a shape of a regular hexagon. Each subdivision grid has the X-ray absorbing sections and X-ray transmitting sections extending in Y direction and arranged alternately in X direction. The X-ray absorbing sections of the adjacent subdivision grids are aligned substantially parallel to each other. The X-ray transmitting sections of the adjacent subdivision grids are aligned substantially parallel to each other. No side of the subdivision grid is parallel to an extending direction of the X-ray absorbing sections and the X-ray transmitting sections. | 06-14-2012 |
20120163535 | GRID FOR RADIOGRAPHY AND REPAIRING METHOD THEREOF, AND RADIATION IMAGING SYSTEM - In a second grid, X-ray absorbing portions and X-ray transparent portions extending in a Y direction are alternately arranged in an X direction. After the manufacture of the second grid, a defective portion is detected in the second grid. A rectangular area to be cut out is set along the X and Y directions so as to enclose this defective portion. By cutting out the rectangular area, a cutout is formed. A micro grid, which is smaller than the cutout, is fitted into the cutout such that two adjoining sides of the micro grid are in contact with two adjoining sides of the cutout. A gap left between an outline of the cutout and the micro grid is filled with Sn—Pb as an X-ray absorbing material. | 06-28-2012 |
20120163541 | RADIOGRAPHIC APPARATUS AND RADIATION IMAGE DETECTOR - In a radiographic apparatus for obtaining a phase contrast image, and which includes a first grating and a second grating arranged with a predetermined distance therebetween, one of the first grating and the second grating is composed of plural unit gratings, each corresponding to a pixel, arranged in the direction of pixel columns. Further, the plural unit gratings are arranged in such a manner to be shifted, parallel to each other, in a direction orthogonal to a direction in which the other one of the first grating and the second grating extends by distances different from each other with respect to the other one of the first grating and the second grating. Further, image signals read out from groups of pixel rows, the groups being different from each other, are obtained, as image signals representing fringe images different from each other, based on image signals obtained by the radiation image detector by detecting radiation that has passed through the first grating and the second grating. Further, a phase contrast image is generated based on the image signals representing the plural of fringe images. | 06-28-2012 |
20120181427 | RADIATION IMAGE CAPTURING APPARATUS AND RADIATION IMAGE DETECTOR - A radiation image capturing apparatus for obtaining a phase contrast image using first and second grids in which either one of the grids is formed of a plurality of unit grids, each corresponding to each pixel circuit, and at least three unit grids in a predetermined area corresponding to one pixel of the phase contrast image are disposed shifted in parallel by different distances with respect to the other grid and arithmetic units for calculating at least two signals for generating the one pixel of the phase contrast image based on pixel signals read out from the pixel circuits corresponding to the at least three unit grids in the predetermined area, the number of the signals being smaller than the number of the pixel signals, are provided in the radiation image detector. | 07-19-2012 |
20120183124 | GRID FOR RADIOGRAPHY, RADIATION IMAGE DETECTOR, RADIATION IMAGING SYSTEM, AND METHOD FOR MANUFACTURING GRID - Periodic electrodes in a pattern of many lines are formed on a first surface of a nonlinear single crystal substrate. The nonlinear single crystal substrate is put in a vacuum chamber, and heated with a heater. Then, high voltage is applied to the nonlinear single crystal substrate. Thus, the direction of spontaneous polarization of the nonlinear single crystal substrate is reversed in portions facing to the periodic electrodes, which are referred to as reversed portions. After the nonlinear single crystal substrate is bonded to a support substrate, only non-reversed portions of the nonlinear single crystal substrate are removed by wet etching, and grooves with a high aspect ratio are left between the remaining reversed portions. The grooves are filled with an X-ray absorbing material such as gold. The grooves filled with the gold compose X-ray absorbing portions of a grid, while the reversed portions compose X-ray transparent portions. | 07-19-2012 |
20120189101 | RADIOGRAPHIC IMAGING APPARATUS AND RADIOGRAPHIC IMAGE DETECTOR - A radiographic imaging apparatus for obtaining a phase contrast image by using two gratings including a first grating and a second grating, wherein one of the first grating and the second grating includes a plurality of unit gratings arranged in a predetermined range corresponding to each pixel forming the phase contrast image, wherein the unit gratings are formed by sets of unit grating members extending in different directions from each other, and a pixel signal of each pixel of the phase contrast image is generated based on a plurality of detection signals detected by the pixel sections corresponding to the unit gratings in the predetermined range. | 07-26-2012 |
20120201349 | GRID FOR USE IN RADIATION IMAGING AND GRID PRODUCING METHOD, AND RADIATION IMAGING SYSTEM - An X-ray transmissive substrate is etched to form a plurality of grooves, a plurality of X-ray transmitting sections, and a plurality of supporting portions. The grooves, formed between the X-ray transmitting sections, extend in Y direction and are arranged in X direction orthogonal to the Y direction. In the grooves, the supporting portions protrude from sides of the X-ray transmitting sections in the X direction and are arranged alternately in the Y direction. The supporting portions support the X-ray transmitting sections when the grooves are filled with an X-ray absorbing material through electroplating. The supporting portions prevent the X-ray transmitting sections from falling over due to waves of a plating liquid and uneven growth of the X-ray absorbing material. | 08-09-2012 |
20130052826 | High Aspect Ratio Grid for Phase Contrast X-ray Imaging and Method of Making the Same - Semiconductor substrates with high aspect ratio recesses formed therein are described. The high aspect ratio recesses have bottom surface profile characteristics that promote formation of initial growth sites of plated metal as compared to the side surfaces of the recesses. Processes for making and plating the recesses are also disclosed. The metal-plated high aspect ratio recesses can be used as X-ray gratings in Phase Contrast X-ray imaging apparatuses. | 02-28-2013 |
20130284933 | RADIOLOGICAL IMAGE DETECTION APPARATUS AND METHOD OF MANUFACTURING THE SAME - The device includes: a scintillator | 10-31-2013 |
20130284934 | RADIOLOGICAL IMAGE CONVERSION PANEL, METHOD OF MANUFACTURING THE SAME, AND RADIOLOGICAL IMAGE DETECTION APPARATUS - A radiological image conversion panel | 10-31-2013 |
20130284935 | RADIOLOGICAL IMAGE DETECTION APPARATUS AND METHOD OF MANUFACTURING THE SAME - The X-ray image detection apparatus | 10-31-2013 |
20130292572 | RADIOLOGICAL IMAGE CONVERSION PANEL, METHOD OF MANUFACTURING THE SAME, AND RADIOLOGICAL IMAGE DETECTION APPARATUS - A radiological image conversion panel | 11-07-2013 |
20130334427 | RADIOLOGICAL IMAGE DETECTION APPARATUS AND RADIATION IMAGING APPARATUS - An adiological image detection apparatus | 12-19-2013 |
20140124674 | RADIOLOGICAL IMAGE CONVERSION PANEL, METHOD OF MANUFACTURING THE SAME, AND RADIOLOGICAL IMAGE DETECTION APPARATUS - A radiological image conversion panel | 05-08-2014 |