Patent application number | Description | Published |
20120121069 | X-RAY GENERATING APPARATUS AND METHOD OF DRIVING X-RAY TUBE - An inverter circuit is shared by respective drive circuits that supply a predetermined voltage to a lens electrode and a grid electrode, or to a lens electrode and a cathode electrode. A DC voltage obtained by full-wave rectifying a pulse train output from the inverter circuit is supplied to the lens electrode, a DC voltage obtained by half-wave rectifying a pulse train output from the inverter circuit is supplied to the grid electrode or cathode electrode. At times of a first operation and a last operation of the inverter circuit during a period of generating X-rays, operations of the inverter circuit are controlled such that a trans circuit outputs a negative polarity voltage to the full-wave rectifying circuit and the half-wave rectifying circuit, respectively. | 05-17-2012 |
20120307974 | X-RAY TUBE AND RADIATION IMAGING APPARATUS - An X-ray tube comprises: an envelope which has a cathode at one end and an anode at another end of a barrel of a tubular insulating tube and which has a sealed interior; an electron gun which is arranged inside the envelope and has a shape that protrudes from the cathode; and a target which is electrically connected to the anode and generates X-rays when being irradiated with electrons emitted from the electron gun. With reference to an end position that is a projection of a position of an end on the anode side of the electron gun onto an inner wall of the insulating tube, a mean wall thickness of the barrel is greater on the cathode side than on the anode side. | 12-06-2012 |
20120318987 | RADIOACTIVE RAY GENERATING APPARATUS AND RADIOACTIVE RAY IMAGING SYSTEM - A radioactive ray generating apparatus includes a second shielding member, a target, and a first shielding member, which are sequentially disposed from an electron emission source side. A shortest distance from a maximum radiation intensity portion of the target to the first shielding member is shorter than a shortest distance from the maximum radiation intensity portion of the target to the second shielding member. | 12-20-2012 |
20130016810 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUSAANM Tamura; MikiAACI Kawasaki-shiAACO JPAAGP Tamura; Miki Kawasaki-shi JPAANM Aoki; ShujiAACI Yokohama-shiAACO JPAAGP Aoki; Shuji Yokohama-shi JPAANM Yanagisawa; YoshihiroAACI Fujisawa-shiAACO JPAAGP Yanagisawa; Yoshihiro Fujisawa-shi JPAANM Ueda; KazuyukiAACI TokyoAACO JPAAGP Ueda; Kazuyuki Tokyo JP - In a radiation imaging apparatus which comprises an envelope which has a first window for transmitting a radiation and is filled with an insulating liquid, a radiation tube in the envelope which has, at a position facing the first window, a second window for transmitting the radiation, and a shielding member, a solid insulating member is arranged between the shielding member and the inner wall of the envelope, an opening is formed at a position on the insulating member corresponding to the first window, and a shortest distance from the shielding member to the first window or the inner wall of the envelope through the opening of the insulating member without the insulating member is made longer than a shortest distance from the shielding member to the first window or the inner wall of the envelope through the insulating member, thereby improving withstand voltage performance without reducing an radiation amount. | 01-17-2013 |
20130016811 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUSAANM Ueda; KazuyukiAACI TokyoAACO JPAAGP Ueda; Kazuyuki Tokyo JPAANM Aoki; ShujiAACI Yokohama-shiAACO JPAAGP Aoki; Shuji Yokohama-shi JPAANM Yanagisawa; YoshihiroAACI Fujisawa-shiAACO JPAAGP Yanagisawa; Yoshihiro Fujisawa-shi JPAANM Tamura; MikiAACI Kawasaki-shiAACO JPAAGP Tamura; Miki Kawasaki-shi JP - In a construction having a radiation tube in an envelope filled with an insulating liquid, a radiation generating apparatus which realizes a miniaturization of the apparatus, an improvement of a withstanding voltage between the envelope and the radiation tube, and a decrease in attenuation amount of the radiation and a radiation imaging apparatus using the radiation generating apparatus are provided. The radiation generating apparatus has an envelope | 01-17-2013 |
20130016812 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS USING THE SAMEAANM Yanagisawa; YoshihiroAACI Fujisawa-shiAACO JPAAGP Yanagisawa; Yoshihiro Fujisawa-shi JPAANM Ueda; KazuyukiAACI TokyoAACO JPAAGP Ueda; Kazuyuki Tokyo JPAANM Tamura; MikiAACI Kawasaki-shiAACO JPAAGP Tamura; Miki Kawasaki-shi JPAANM Aoki; ShujiAACI Yokohama-shiAACO JPAAGP Aoki; Shuji Yokohama-shi JP - A radiation generating apparatus | 01-17-2013 |
20130034207 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - The present invention relates to a radiation generating apparatus which includes an envelope provided with a first window through which radiation is transmitted, a radiation tube housed in the envelope and provided with a second window through which the radiation is transmitted, the second window being located at a position opposite the first window, and an insulating fluid adapted to fill between the inner wall of the envelope and the radiation tube. Plural plates are arranged side by side between the first window including its periphery and the second window including its periphery by overlapping one another via gaps. The gaps is formed among the plates, thereby the withstanding voltage between the first window and second window is made larger. | 02-07-2013 |
20130129045 | TRANSMISSION TYPE RADIATION GENERATING SOURCE AND RADIOGRAPHY APPARATUS INCLUDING SAME - A transmission type radiation generating device includes an electron emitting source; a substrate that transmits radiation; a target provided on a surface of the substrate facing the electron emitting source and configured to generate radiation when electrons emitted from the electron emitting source are applied thereto; a shield member having a radiation passage that allows the radiation transmitted through the substrate to pass therethrough, the shield member being connected to the substrate and including at least a forward shield portion that protrudes in a direction away from the electron emitting source with respect to the target; and an insulating fluid in contact with the forward shield portion. The shield member includes a low-melting-point metal or a low-melting point alloy provided at least in the forward shield portion. | 05-23-2013 |
20130195246 | TARGET STRUCTURE AND RADIATION GENERATING APPARATUS - A radiation-transmissive type target structure includes a target layer formed on a substrate. The target layer has a thickness equal to or less than 20 μm, and is configured to generate radiation in response to irradiation of electrons. A surface of the target layer is formed with projecting portions and depressed portions, the depressed portions have a depth of at least half the thickness of the target layer. Advantageously, separation of the target layer at an interface between the substrate and the target layer is substantially prevented. A radiation generating apparatus and a radiography system equipped with the target structure are also disclosed. | 08-01-2013 |
20130230143 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - A radiation generating apparatus | 09-05-2013 |
20130235975 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - There is provided a radiation generating apparatus having a simple structure and capable of shielding unnecessary radiation, cooling a target, reducing the size and weight of the apparatus, and achieving higher reliability, and a radiation imaging apparatus having the same. A transmission type radiation tube is held inside a holding container filled with a cooling medium. The transmission type radiation tube includes an envelope having an aperture, an electron source arranged inside the envelope so as to face the aperture of the envelope, a target unit for generating a radiation responsive to an irradiation with an electron emitted from the electron source, and a shield member for shielding a part of the radiation emitted from the target unit. The cooling medium contacts at least a part of the shield member. | 09-12-2013 |
20130308754 | RADIATION GENERATING TARGET, RADIATION GENERATING TUBE, RADIATION GENERATING APPARATUS, AND RADIATION IMAGING SYSTEM - The present invention provides a transmission type radiation generating target which can suppress the exfoliation or the crack of a target layer in an interface between a supporting substrate and the target layer, even when the density of incident electrons has been enhanced or the potential of the target has been enhanced. The transmission type radiation generating target includes a supporting substrate, and a target layer which is arranged on the supporting substrate and generates radiation in response to irradiation with an electron beam, wherein the target layer has an opening through which the supporting substrate is exposed, and the opening overlaps with a position at which the density of the irradiation with the electron beam is maximum. | 11-21-2013 |
20140029725 | X-RAY GENERATOR AND X-RAY IMAGING APPARATUS INCLUDING THE SAME - Provided is an X-ray generator comprising an X-ray tube including a cylindrical body; an electron source in the body; a target at an end of the X-ray tube facing the electron source, the target generating X-rays by irradiation with electrons; a container in which the X-ray tube is arranged; insulating liquid filled between the X-ray tube and the container; and
| 01-30-2014 |
20140140486 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - A radiation generating apparatus of the present invention includes an envelope | 05-22-2014 |
20140153695 | RADIATION GENERATING APPARATUS AND RADIATION IMAGING APPARATUS - A radiation generating apparatus includes: an envelope | 06-05-2014 |
20140177796 | X-RAY TUBE - In an X-ray tube having an X-ray shielding member allowing an electron ray to pass through an electron passing hole toward a target, separately from the cathode-side opening of the electron passing hole, a gas exhaust path allowing communication between the inside and outside of the electron passing hole is provided so that gas molecules generated in the electron passing hole can be easily diffused out of the electron passing hole. The degradation of the cathode caused by accelerated collisions with the cathode, of cations generated by collisions of electrons with gas molecules generated in the electron passing hole by a desorption phenomenon due to electron ray irradiation to the target, is reduced. | 06-26-2014 |
20140192957 | X-RAY GENERATION APPARATUS AND X-RAY RADIOGRAPHIC APPARATUS - In an X-ray generation apparatus of transmission type including an electron emission source, and a target generating an X-ray with collision of electrons emitted from the electron emission source against the target, the X-ray generation apparatus further includes a secondary X-ray generation portion generating an X-ray with collision of electrons reflected by the target against the secondary X-ray generation portion, and the secondary X-ray generation portion and the target are arranged such that the X-ray generated with the direct collision of the electrons against the target and the X-ray generated with the collision of the electrons reflected by the target against the secondary X-ray generation portion are both radiated to an outside. X-ray generation efficiency is increased by effectively utilizing the electrons reflected by the target. | 07-10-2014 |
20140241492 | MULTIRADIATION GENERATION APPARATUS AND RADIATION IMAGING SYSTEM - A multiradiation generation apparatus according to the present invention includes a plurality of radiation sources arranged in a row. Each of the radiation sources includes an electron source configured to emit electrons and a target unit configured to generate radiation upon receiving electrons emitted from the electron source. At least one of the radiation sources is a dual-purpose radiation source used for both tomosynthesis imaging and non-tomosynthesis imaging, and the other radiation sources are single-purpose radiation sources used only for tomosynthesis imaging. | 08-28-2014 |
20140294150 | RADIATION GENERATING APPARATUS AND RADIOGRAPHING SYSTEM USING THE SAME - In a radiation generating apparatus of the invention, a radiation tube having a cathode for emitting an electron and an anode for generating a radiation by an irradiation of the electron emitted from the cathode is enclosed in a housing container filled with an insulating liquid. The apparatus has a mechanism in which a voltage for allowing the insulating liquid to flow can be applied between the cathode and the anode in a state where the cathode does not emit any electron. Even when the generation of the radiation is stopped, the insulating liquid can be efficiently sufficiently cooled without providing mechanical stirring means, and a high reliability is obtained even for intermittent use. | 10-02-2014 |
20140362972 | X-RAY GENERATOR AND X-RAY IMAGING APPARATUS - Provided is an X-ray generator ( | 12-11-2014 |
20140362973 | X-RAY GENERATOR AND X-RAY IMAGING APPARATUS - Provided is an X-ray generator including an electron passage in an electron-passage forming member; and a target on an insulative substrate. The transmission X-ray generator irradiates the target with electrons that have passed through the electron passage to generate X-rays. The target is provided at a central region of the substrate; the electron passage accommodates a secondary-X-ray generating section that generates X-rays by irradiation with electrons reflected from the target; the secondary-X-ray generating section and the target are disposed so that both of X-rays generated by direct irradiation of the target with the electrons and X-rays generated by irradiation of the secondary-X-ray generating section with the electrons reflected from the target are radiated to the outside; and at least part of the peripheral region of the substrate has higher transmittance for the X-rays generated at the secondary-X-ray generating section than the central region of the substrate. | 12-11-2014 |
20140369469 | X-RAY GENERATION APPARATUS AND X-RAY RADIOGRAPHIC APPARATUS - In an X-ray generation apparatus of transmission type including an electron passage surrounded by and formed in an electron passage forming member, and generating an X-ray by colliding electrons having passed through the electron passage against a target, wherein the electron passage includes a secondary X-ray generation portion that generates an X-ray with collision of electrons reflected by the target against the secondary X-ray generation portion, the secondary X-ray generation portion and the target are arranged such that the X-ray generated with direct collision of the electrons against the target and the X-ray generated with the collision of the electrons reflected by the target against the secondary X-ray generation portion are both radiated to an outside, and an atomic number of a material of the electron passage forming member is larger than that of the target. X-ray generation efficiency is increased by effectively utilizing the electrons reflected by the target. | 12-18-2014 |
20150030119 | MULTI-SOURCE RADIATION GENERATOR AND RADIOGRAPHIC IMAGING SYSTEM - A multi-source radiation generator in which plural radiation sources are arranged in series includes a control unit that controls a dose of radiation emitted from each of the radiation sources depending on positions of the radiation sources, and reduces variation in a radiation dose resulting from differences in positions of the radiation sources by changing an irradiation time, an anodic current value of each of the radiation sources depending on a distance from each of the radiation sources to a subject. | 01-29-2015 |