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公开(公告)号：DE4422928A1
公开(公告)日：1995-01-12
申请号：DE4422928
申请日：1994-06-29
Applicant: SHIMADZU CORP , JAPAN BROADCASTING CORP
Inventor： OIKAWA SHIRO , TAKEMOTO TAKAYUKI , KATOU TUTOMU , SUZUKI SHIROU , TANIOKA KENKICHI
IPC: A61B6/00 , G01T1/20 , H01L27/146 , G01T1/29 , H01L27/105
Abstract: A two-dimensional radiation detector for producing a radiological image which is compatible with conversion into electrical signals. The detector has a multilayer structure, including a scintillator, a transparent electrode film, a photoconductive film and a search-switching layer. The search-switching level has conductors which make contact with the photoconductive film and are arranged in a matrix, a plurality of FETs arranged correspondingly to the matrix and a uniformly planar conductor, in order to apply a bias voltage successively row by row via the FETs to the matrix conductor. Each FET has a drain electrode connected to one of the matrix conductors, a source electrode connected to the uniformly planar conductor and a gate electrode connected to the control circuit. The transparent electrode film has column conductors corresponding to the columns of the matrix conductors, a signal read line being connected to each column conductor.
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公开(公告)号：DE4410269A1
公开(公告)日：1994-10-06
申请号：DE4410269
申请日：1994-03-24
Applicant: SHIMADZU CORP , JAPAN BROADCASTING CORP
Inventor： TONAMI HIROMICHI , NISHIKAWA TAKAHISA , TAKEMOTO TAKAYUKI , KIMURA YUTARO , HIRAGAKI KEIICHI , KISHIMOTO HIDETOSHI , SHIMIZU TATSUYA , OIKAWA SHIRO , KATOU TUTOMU , SUZUKI SHIROU , YAMAGISHI TOSHIO , TANIOKA KENKICHI
Abstract: An X-ray image recording tube for converting a transmitted X-ray image into electric signals has a target structure with a fluorescence element, a light-transparent (light-transmitting) conductive layer and a photoconductive layer. The fluorescence element receives transmitted X-rays having a two-dimensional distribution and converts the transmitted X-rays into visible rays having a two-dimensional distribution. The light-transparent conductive layer is optically coupled to a surface of the fluorescence element in a manner opposite to its X-ray impinging surface. The light-transparent conductive layer receives a high voltage. The photoconductive layer is laminated onto the light-transparent conductive layer and has an amorphous semiconductor layer with functions for converting visible rays, transmitted through the light-transparent conductive layer and having a two-dimensional distribution, into electric charges having a two-dimensional distribution and for multiplying electric charges, having a two-dimensional distribution, by means of electric fields which are formed by the high voltage which is applied to the light-transparent conductive layer. The recording tube furthermore has a signal read-out unit for scanning the surface of the photoconductive layer in a manner opposite to an impinging surface of visible rays for the purpose of... two-dimensional electric... impinging on the photoconductive layer... Original abstract incomplete.
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公开(公告)号：DE69919260T2
公开(公告)日：2005-08-11
申请号：DE69919260
申请日：1999-04-20
Applicant: SHARP KK , SHIMADZU CORP
Inventor： OIKAWA SHIRO , ADACHI SUSUMU , TAKEMOTO TAKAYUKI , YAMANE YASUKUNI
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公开(公告)号：DE69919260D1
公开(公告)日：2004-09-16
申请号：DE69919260
申请日：1999-04-20
Applicant: SHARP KK , SHIMADZU CORP
Inventor： OIKAWA SHIRO , ADACHI SUSUMU , TAKEMOTO TAKAYUKI , YAMANE YASUKUNI
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公开(公告)号：DE69105610T2
公开(公告)日：1995-04-13
申请号：DE69105610
申请日：1991-04-30
Applicant: SHIMADZU CORP
Inventor： OIKAWA SHIRO
Abstract: An X-ray tube for a CT apparatus comprises a ring-shaped vacuum tube (12) containing a fixed cathode (13) having a thermion emitting surface, a ring-shaped fixed anode, (15) and a ring-shaped rotatable cathode (14) interposed between the fixed cathode and fixed anode. The rotatable cathode defines a thermion receiving surface (49) opposed to the thermion emitting surface, and a thermion emitting portion (41) opposed to the fixed anode. Thermions are emitted from the thermion emitting portion toward the fixed anode while the rotatable cathode is suspended to non-contact state and rotated at high speed. With the thermions being accelerated and colliding on the fixed anode, an X-ray is generated toward the center of the vacuum tube. The X-ray generating position moves at high speed along a circumferential surface of the fixed anode with rotation of the rotatable cathode.
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Patent Agency Ranking
公开(公告)号：DE69105610D1
公开(公告)日：1995-01-19
申请号：DE69105610
申请日：1991-04-30
Applicant: SHIMADZU CORP
Inventor： OIKAWA SHIRO
Abstract: An X-ray tube for a CT apparatus comprises a ring-shaped vacuum tube (12) containing a fixed cathode (13) having a thermion emitting surface, a ring-shaped fixed anode, (15) and a ring-shaped rotatable cathode (14) interposed between the fixed cathode and fixed anode. The rotatable cathode defines a thermion receiving surface (49) opposed to the thermion emitting surface, and a thermion emitting portion (41) opposed to the fixed anode. Thermions are emitted from the thermion emitting portion toward the fixed anode while the rotatable cathode is suspended to non-contact state and rotated at high speed. With the thermions being accelerated and colliding on the fixed anode, an X-ray is generated toward the center of the vacuum tube. The X-ray generating position moves at high speed along a circumferential surface of the fixed anode with rotation of the rotatable cathode.
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公开(公告)号：JP2011024664A
公开(公告)日：2011-02-10
申请号：JP2009171016
申请日：2009-07-22
Applicant: Shimadzu Corp , 株式会社島津製作所
Inventor： OIKAWA SHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a radiographic apparatus contrived so that an artifact derived from a radiation grid is prevented from being projected in a perspective image as far as possible even when a radiation detector is moved to a radiation source.
SOLUTION: By the configuration of this invention, the width of the shadow in the lateral direction of absorption foil projected to an FPD is equal when the position of the focus of an X-ray tube to an FPD is at the position of P
min and when it is at the position of P
max . In such a manner, since the advancing direction of a radiation beam to the absorption foil of the radiation grid is not changed as far as possible regardless of the movement of the FPD, the radiation beam (direct beam) radiated from the X-ray tube reaches the FPD without being obstructed by the absorption foil. Thus, a false image appearing in a radiation perspective image is suppressed.
COPYRIGHT: (C)2011,JPO&INPITAbstract translation: 要解决的问题：提供一种放射线照相设备，使得即使当辐射检测器被移动到辐射源时，也可以尽可能地防止从辐射栅格导出的伪影投射在透视图像中。 解决方案：通过本发明的结构，当X射线管对FPD的焦点位置处于FPD的位置时，投影到FPD的吸收箔的横向上的阴影的宽度相等 P
min ，当它处于P max 的位置时。 以这种方式，由于辐射光束到辐射格栅的吸收箔的前进方向与FPD的移动无关地尽可能地变化，所以从X射线管辐射的辐射束（直射光束） 到达FPD而不被吸收箔阻挡。 因此，抑制了在放射线透视图像中出现的虚假图像。 版权所有（C）2011，JPO＆INPIT -
公开(公告)号：JP2008168110A
公开(公告)日：2008-07-24
申请号：JP2007182274
申请日：2007-07-11
Applicant: Shimadzu Corp , 株式会社島津製作所
Inventor： KUWABARA SHOJI , OIKAWA SHIRO
Abstract: PROBLEM TO BE SOLVED: To provide structure and a manufacturing method for inexpensively and stably obtaining a scattered X-ray removing grid, which takes air as intermediate substance and accurately positions and holds an X-ray absorbing substance.
SOLUTION: A guide slit plate 2 provided with guide slits 2a formed parallel at a predetermined distance so that metal foils 3 as the X-ray absorbing substance disposed between them are fitted parallel to the primary X-ray is relatively fixed and disposed, and with both end parts of each metal foil 3 inserted in the opposite slits 2a of each guide slit plate 2, one end or both ends of each metal foil 3 are held in the state of being given tension by an energizing means (a tension coil spring or the like) 7 outside the slits, whereby each metal foil 3 can be accurately positioned and subjected to correction for deformation in the bending state due to its dead load or in the natural state to stably maintain the position, shape and attitude.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 解决问题的方案：提供以空气作为中间物质并准确地定位并保持X射线吸收物质的散射X射线去除栅极的廉价且稳定地获得的结构和制造方法。 解决方案：引导狭缝板2设置有以预定距离平行形成的引导狭缝2a，使得设置在它们之间的作为X射线吸收物质的金属箔3与主X射线平行配合相对固定和布置 并且每个金属箔3的两个端部插入每个引导狭缝板2的相对的狭缝2a中，每个金属箔3的一端或两端通过施力装置（张力）被保持在张力的状态 螺旋弹簧等）7，从而能够精确地定位金属箔3，并且由于其静载或自然状态而在弯曲状态下进行变形，从而稳定地保持位置，形状和姿态。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2000329710A
公开(公告)日：2000-11-30
申请号：JP13553099
申请日：1999-05-17
Applicant: SHIMADZU CORP
Inventor： OIKAWA SHIRO
Abstract: PROBLEM TO BE SOLVED: To set an accurate tomographic mode which corresponds to a photographing state. SOLUTION: This apparatus is provided with a constitution which can change a laminal angle in such a way that, when a photographing mode having a wide photographing range is desired even when the resolution in the depth direction of the section MA of an object, to be photographed, including the point of intersection Ma of a radiation irradiation axis Xa with a shaft ra is low, a smaller laminal angle α1 is set and that, when a photographing mode used to increase the resolution in the depth direction is desired even when the photographing range is narrow, a larger laminal angle α2 is set. When the laminal angle can be changed, the right balance between the resolution in the depth direction of the object and the photographing range can be adjusted. As a result, the degree of freedom of the photographing mode becomes large, and a tomographic operation which is matched to the photographing state can be performed.
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公开(公告)号：JP2000079119A
公开(公告)日：2000-03-21
申请号：JP25244098
申请日：1998-09-07
Applicant: SHIMADZU CORP
Inventor： OIKAWA SHIRO
Abstract: PROBLEM TO BE SOLVED: To easily take two types of X-ray computerized tomography of a CT type and non-CT type with the same machine. SOLUTION: As a X-ray computerized tomography, when a CT type of X-ray computerized tomography is designated, a rotation part 10 of picture pick-up system rotates the interlocked X-ray tube 2 and panel type X-ray sensor 3, and a CT type picture composition part 17 proceeds the process of the CT tomogram based on the detected data of the X-ray. When a non-CT type of X-ray computerized tomography is designated, a parallel motion part 11 of the picture pick-up system parallelly moves the interlocked X-ray tube 2 and the X-ray sensor 3, a non-CT type composition part 19 proceeds the process of the non-CT tomogram based on the detected data of the X-ray. Therefore, designated CT type tomograms and designated non-CT type tomograms can automatically be taken only by designating a picture pick-up mode.
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