公开(公告)号：US6052434A

公开(公告)日：2000-04-18

申请号：US777369

申请日：1996-12-27

Applicant: Thomas L. Toth ,  Willi H. Hampel ,  Stephen W. Gravelle ,  Wayne F. Block

Inventor： Thomas L. Toth ,  Willi H. Hampel ,  Stephen W. Gravelle ,  Wayne F. Block

IPC: A61B6/03 ,  H01J35/10 ,  H01J35/08

CPC classification number: A61B6/032 ,  A61B6/4021 ,  H01J35/10

Abstract: An X-ray tube comprises an anode assembly having an associated anode and a cathode assembly for providing a focused electron beam directed to the anode. An anode target, associated with the anode assembly, accelerates the electron beam and produces X-rays upon electron impact with the anode target. Off-focal radiation tends to be most intensely emitted by the top surface of the target. In conventional X-ray tubes, the off-focal radiation as seen by the detector encompasses almost the entire top surface of the target assembly. In accordance with the present invention, the anode target comprises a cut-out top surface for reducing off-focal radiation, by blocking the off-focal radiation from the top surface from reaching the detector. Blocking the radiation produced at the top surface becomes more important as the ratio of the track area visible at the detector decreases with respect to the top surface area.

Abstract translation: X射线管包括具有相关阳极和阴极组件的阳极组件，用于提供指向阳极的聚焦电子束。 与阳极组件相关联的阳极靶加速电子束并在与阳极靶电子碰撞时产生X射线。 局部放射线趋于由靶的顶面最强烈地发射。 在常规的X射线管中，由检测器所看到的非焦距辐射几乎涵盖了目标组件的整个顶表面。 根据本发明，阳极靶包括用于通过阻挡来自顶表面的偏焦辐射到达检测器来减少焦点外辐射的切除顶表面。 阻挡在顶表面处产生的辐射变得更加重要，因为检测器处可见的轨道区域的比率相对于顶表面积降低。

公开(公告)号：US5930332A

公开(公告)日：1999-07-27

申请号：US758327

申请日：1996-12-03

Applicant: Michael Robert Eggleston ,  Mark Gilbert Benz ,  Herman Arthur Nied

Inventor： Michael Robert Eggleston ,  Mark Gilbert Benz ,  Herman Arthur Nied

IPC: H01J35/10

CPC classification number: H01J35/10 ,  H01J2235/083 ,  H01J2235/1013

Abstract: A new method for forming a joint between a molybdenum-based alloy structure and a structure formed from a more ductile alloy is disclosed. The method involves the solid-state bonding of the two structures, which can be carried out by a variety of techniques, such as inertia-welding or explosive-welding. The molybdenum-based alloy may be a TZM-type material, while the more ductile alloy may be tantalum-based, niobium-based, or nickel-based, for example. This method is especially useful in the manufacture of x-ray devices, such as those which include rotary anode assemblies. As one illustration, the method can be used to provide a very strong joint between a target formed from a molybdenum alloy and an insert formed from a tantalum alloy. Related x-ray assemblies are also described.

Abstract translation: 公开了一种用于形成钼基合金结构和由较延性合金形成的结构之间的接头的新方法。 该方法涉及两种结构的固态接合，这可以通过各种技术进行，例如惯性焊接或爆炸焊接。 钼基合金可以是TZM型材料，而更多的延性合金可以是例如钽基，铌基或镍基。 该方法在诸如包括旋转阳极组件的X射线装置的制造中特别有用。 作为一个例证，该方法可用于在由钼合金形成的靶和由钽合金形成的插入件之间提供非常牢固的接合。 还描述了相关的X射线组件。

公开(公告)号：US5867556A

公开(公告)日：1999-02-02

申请号：US957056

申请日：1997-10-24

Applicant: Douglas J. Snyder ,  Thomas Block ,  Dale G. Chrisien

Inventor： Douglas J. Snyder ,  Thomas Block ,  Dale G. Chrisien

IPC: H01J35/28

CPC classification number: H01J35/10

Abstract: In an X-ray tube having a housing, an outer frame for providing a vacuum, a cathode mounted in the outer frame to project a stream of electrons, and an anode disposed to receive the electron stream at a focal spot position to produce X-rays, apparatus is provided for selectively mounting the anode within the housing. More particularly, the apparatus is disposed to respond to the heat generated by the X-ray production process to provide compensation for undesirable effects resulting from thermal expansion of the anode. The apparatus generally comprises an anode frame structure disposed to support the anode for rotation about a specified axis, and further comprises an anode plate joined to the frame structure for locating the anode at an initial position, in spaced-apart relationship with the cathode and with the aperture of a collimator in fixed relation to the tube, and for displacing the anode away from the initial position, in a direction opposite to the direction of anode thermal expansion, to provide compensation therefor. A compliant plate mounting arrangement is provided for selectively attaching the anode plate to the housing.

Abstract translation: 在具有壳体的X射线管，用于提供真空的外框架，安装在外框架中以投射电子流的阴极以及设置成在焦点位置处接收电子流以产生X射线的X射线管， 提供了用于选择性地将阳极安装在壳体内的装置。 更具体地说，该设备被设置为响应由X射线生产过程产生的热量，以补偿由阳极的热膨胀引起的不良影响。 该装置通常包括阳极框架结构，其设置成支撑阳极以围绕指定的轴线旋转，并且还包括连接到框架结构的阳极板，用于将阳极定位在与阴极隔开关系的初始位置处， 准直器的孔与管固定，并且用于使阳极远离初始位置，沿与阳极热膨胀方向相反的方向移位，以提供补偿。 提供了一种柔性板安装装置，用于选择性地将阳极板连接到壳体。

公开(公告)号：US5838762A

公开(公告)日：1998-11-17

申请号：US762013

申请日：1996-12-11

Applicant: Eti Ganin ,  Mark O. Derakhshan ,  Thomas G. Ebben

Inventor： Eti Ganin ,  Mark O. Derakhshan ,  Thomas G. Ebben

IPC: H01J9/14 ,  H01J35/10

CPC classification number: H01J35/10 ,  H01J2235/1013

Abstract: A method for assembling a rotating X-ray tube structure ensures balance retention during the life of the tube. The X-ray tube structure has a cathode for emitting electrons, and a rotor and a bearing assembly for facilitating rotation of an anode. At least one joint is identified in the X-ray tube structure and interference fit assembly is used to eliminate shifts at the joint. The interference fit assembly is particularly advantageous for eliminating even the minutest shifts in the main joints of the anode assembly. Interference fit assembly can be applied between the rotor and the anode target to provide a first joint having balance retention; and interference fit assembly can be applied between the bearing assembly and the rotor to provide a second joint having balance retention.

Abstract translation: 一种组装旋转X射线管结构的方法确保了管子寿命期间的平衡保持。 X射线管结构具有用于发射电子的阴极和用于促进阳极旋转的转子和轴承组件。 在X射线管结构中识别至少一个关节，并且使用过盈配合组件来消除关节处的移位。 过盈配合组件对于消除甚至阳极组件的主接头中的最小变化是特别有利的。 可以在转子和阳极靶之间施加干涉配合组件，以提供具有平衡保持力的第一接头; 并且可以在轴承组件和转子之间施加过盈配合组件以提供具有平衡保持力的第二接头。

公开(公告)号：US5508118A

公开(公告)日：1996-04-16

申请号：US245460

申请日：1993-07-06

Applicant: Takehiko Hayashi ,  Shigehiko Takaoka ,  Hisanori Ohara ,  Takashi Yoshioka

Inventor： Takehiko Hayashi ,  Shigehiko Takaoka ,  Hisanori Ohara ,  Takashi Yoshioka

IPC: H01J9/14 ,  H01J35/10

CPC classification number: H01J35/10 ,  Y10T428/12458 ,  Y10T428/12625 ,  Y10T428/1284

Abstract: A long-life, inexpensive rotary anode for use in an X-ray tube having an X-ray generating layer formed by CVD on a graphite substrate and capable of producing high-power X-rays without the possibility of thermal cracks or delamination. When forming the X-ray generating layer of a tungsten-rhenium alloy on the graphite substrate through a rhenium intermediate layer by CVD, material gases are supplied intermittently so that the entire part or only the surface area of the X-ray generating layer will be formed of laminated structure of ultra-thin films each 0.1-5.0 microns thick. The content of rhenium in the tungsten-rhenium alloy forming the X-ray generating layer has a gradient form, i.e. increases from the interface with the rhenium intermediate layer toward the surface, so that the total amount of rhenium added can be reduced.

Abstract translation: 一种长寿命廉价的旋转阳极，用于具有在石墨基片上通过CVD形成的X射线产生层的X射线管，能够产生高功率X射线，而不会发生热裂纹或分层。 当通过CVD通过铼中间层在石墨基板上形成钨 - 铼合金的X射线产生层时，间歇地供给材料气体，使得X射线产生层的整个部分或仅表面积将为 由厚度为0.1-5.0微米的超薄膜的层压结构形成。 形成X射线产生层的钨 - 铼合金中的铼的含量具有梯度形式，即从与铼中间层到表面的界面增加，从而可以减少添加的铼的总量。

公开(公告)号：US5468932A

公开(公告)日：1995-11-21

申请号：US168701

申请日：1993-12-16

Applicant: Heinz J. Jacob

Inventor： Heinz J. Jacob

IPC: B23K26/00 ,  B23K26/14 ,  B23K26/142 ,  B23K26/362 ,  B23K26/364 ,  B23K26/40 ,  H01J9/14 ,  H01J35/10

CPC classification number: B23K26/0084 ,  B23K26/0006 ,  B23K26/0066 ,  B23K26/142 ,  B23K26/1437 ,  B23K26/1476 ,  B23K26/362 ,  B23K26/364 ,  B23K26/40 ,  H01J35/10 ,  H01J9/14 ,  B23K2203/08 ,  B23K2203/50 ,  H01J2235/106

Abstract: The invention relates to a method of generating a pattern of depressions in the surface of a workpiece, in particular one made of molybdenum or a molybdenum alloy for rotary-anode X-ray tubes. Such a method can be arranged in a more inexpensive and/or more environmentally friendly manner in that the workpiece is heated spotwise by a laser beam, the heating spot being directed over the surface in accordance with the pattern of depressions, in that a jet of oxygen is directed at the heating spot, and in that the energy supply to the heating spot is so controlled that the melting temperature of the workpiece material is not reached, while nevertheless the sublimation temperature of the oxide formed by the heating is exceeded.

Abstract translation: 本发明涉及一种在工件表面产生凹陷图形的方法，特别是用于旋转阳极X射线管的由钼或钼合金制成的凹凸图案。 这种方法可以以更便宜和/或更环保的方式布置为：通过激光束对工件进行点阵加热，加热点根据凹陷的图案被引导到表面上， 氧被引导到加热点，并且由于控制加热点的能量供应不能达到工件材料的熔化温度，而是超过由加热形成的氧化物的升华温度。

公开(公告)号：US5305363A

公开(公告)日：1994-04-19

申请号：US863182

申请日：1992-04-03

Applicant: James E. Burke ,  Lester Miller ,  Rodney A. Mattson ,  Carl J. Brunnett ,  Theodore A. Resnick

Inventor： James E. Burke ,  Lester Miller ,  Rodney A. Mattson ,  Carl J. Brunnett ,  Theodore A. Resnick

IPC: A61B6/00 ,  A61B6/03 ,  H01J35/02 ,  H01J35/06 ,  H01J35/10 ,  H01J35/16 ,  H01J35/24 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/26 ,  H05G1/34 ,  H05G1/52 ,  H05G1/60 ,  H05G1/66

CPC classification number: A61B6/035 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/405 ,  A61B6/4275 ,  A61B6/4488 ,  A61B6/482 ,  A61B6/56 ,  H01J35/02 ,  H01J35/06 ,  H01J35/10 ,  H01J35/165 ,  H01J35/24 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/26 ,  H05G1/34 ,  H05G1/52 ,  H05G1/60 ,  H05G1/66 ,  H01J2235/162 ,  H05G1/025

Abstract: A toroidal x-ray tube (I) is supported (II) for rotation about a horizontal axis (170), translation along a vertical axis (172), and translation along a horizontal axis (174). The x-ray tube includes a toroidal housing (A), an annular anode (B), and a cathode (0) which rotates a beam of electrons around the annular anode. A plurality of parallel connected voltage sources (90.sub.1, 90.sub.2, . . . , 90.sub.n) provide a sufficiently high bias voltage between the electron source and the anode that x-rays are generated. The x-ray beam passes through a compensator crystal (62), an annular window (20), a collimator (132), through a subject received in a central bore (26) of the x-ray tube, and impacts an arc segment of radiation detectors (130). The x-ray detectors are stationarily mounted outside of the plane of the annular window (FIGS. 2 and 7), nutate into the plane of the windows opposite of the origin of the x-ray beam (FIG. 6 ), rotate in part (FIG. 9 ) or rotate in full (FIG. 8 ) Angular position monitors (58, 154) determine the angular position of the cathode assembly, hence the x-ray beam, and the angular position of the detectors in the rotating detector embodiment.

Abstract translation: 环形X射线管（I）被支撑（II），用于围绕水平轴线（170）旋转，沿着垂直轴线（172）平移并且沿着水平轴线（174）平移。 X射线管包括环形壳体（A），环形阳极（B）和使电子束围绕环形阳极旋转的阴极（0）。 多个并联的电压源（901,902，...，90n）在产生x射线的电子源和阳极之间提供足够高的偏置电压。 x射线束穿过受体在X射线管的中心孔（26）中的受试者通过补偿晶体（62），环形窗（20），准直器（132），并且撞击弧段 的辐射探测器（130）。 X射线检测器固定地安装在环形窗的平面外（图2和7），并且朝向与X射线束原点相反的窗口的平面（图6）中，部分旋转 （图9）或完全旋转（图8）角位置监视器（58,154）确定阴极组件的角度位置，因此确定旋转检测器实施例中的X射线束和检测器的角位置 。

公开(公告)号：US5291538A

公开(公告)日：1994-03-01

申请号：US72400

申请日：1993-06-03

Applicant: James E. Burke ,  Lester Miller ,  Salvatore G. Perno

Inventor： James E. Burke ,  Lester Miller ,  Salvatore G. Perno

IPC: H01J35/26 ,  H01J35/06 ,  H01J35/10 ,  H01J35/24 ,  H05G1/06 ,  H05G1/08 ,  H05G1/34 ,  H01J35/04

CPC classification number: H05G1/34 ,  H01J35/06 ,  H01J35/10 ,  H01J35/24 ,  H05G1/06 ,  H05G1/08 ,  H01J2235/162

Abstract: An evacuated envelope (C) which is connected with an anode (A), has a cathode assembly (B) rotatably mounted inside. Magnets (44, 46) hold the cathode assembly stationary as the anode and envelope rotate. A ferrite core transformer (60) includes a ferrite core primary (66) stationarily mounted exterior to the envelope. A secondary (64) is mounted to the cathode assembly interior to the envelope. The secondary winding includes a ferrite core (70), a portion of which is surrounded by a ceramic, dielectric bobbin (76). The bobbin includes walls or ridges (78) which define a spiral groove (80) therearound in which an uninsulated electric wire (82) is received. The uninsulated electric wire is connected with a cathode filament (52). The primary winding has a ferrite core (90) that has about five times the cross section as the secondary ferrite core to compensate for a low, about 20%, coupling efficiency between the primary and secondary windings. Preferably, the primary winding core tapers (94) adjacent its pole faces to focus magnetic flux toward pole faces (72, 74) of the secondary ferrite core.

Abstract translation: 与阳极（A）连接的真空外壳（C）具有可旋转地安装在内部的阴极组件（B）。 当阳极和外壳旋转时，磁体（44,46）将阴极组件固定住。 铁氧体磁芯变压器（60）包括固定在信封外部的铁氧体磁芯初级（66）。 次级（64）安装到阴极组件内部的信封。 次级绕组包括铁氧体磁芯（70），其一部分被陶瓷介质绕组（76）包围。 线轴包括限定在其周围的螺旋槽（80）的壁或脊（78），其中接收未绝缘的电线（82）。 非绝缘电线与阴极灯丝（52）连接。 初级绕组具有铁氧体磁芯（90），其具有作为次级铁氧体磁心的约5倍的横截面以补偿初级和次级绕组之间的低约20％的耦合效率。 优选地，初级绕组芯在其极面附近逐渐变细（94），以将磁通聚焦到次级铁氧体磁芯的极面（72,74）。

公开(公告)号：US4468801A

公开(公告)日：1984-08-28

申请号：US401814

申请日：1982-07-26

Applicant: Hajime Sudo ,  Atsushi Takahashi

Inventor： Hajime Sudo ,  Atsushi Takahashi

IPC: F16C39/06 ,  H01J35/10 ,  H01J35/04

CPC classification number: F16C37/005 ,  F16C32/0474 ,  H01J35/10 ,  H01J35/103

Abstract: An evacuated casing has outer and inner tubes respectively covering the outer and inner peripheries of a hollow cylindrical rotor. Ring members of a ferromagnetic material are provided in the inner wall of the rotor and face permanent magnets, which are provided on the inner periphery of the inner tube and are magnetized in the radial directions of the rotor. The permanent magnets are fitted on a cylindrical yoke between first and second poles formed thereon, the fluxes being inserted in the rotor via the inner tube. The first poles are disposed to face the respective ring members, while the second pole is disposed to face the opposed end faces of the ring members. With this arrangement, contactless magnetic bearings are formed to support the rotor stably.

Abstract translation: 抽真空的外壳具有分别覆盖中空圆柱形转子的外周和外周的外管和内管。 铁磁材料的环形构件设置在转子的内壁中并且面对设置在内管的内周上并且沿转子的径向磁化的永磁体。 永久磁铁安装在形成于其上的第一和第二极之间的圆柱形磁轭上，焊剂通过内管插入转子中。 第一极被设置为面对相应的环构件，而第二极被设置为面对环构件的相对端面。 通过这种布置，形成非接触式磁轴承以稳定地支撑转子。

公开(公告)号：US4468800A

公开(公告)日：1984-08-28

申请号：US270366

申请日：1981-06-04

Applicant: Rudolf Friedel ,  Ernst Geldner

Inventor： Rudolf Friedel ,  Ernst Geldner

IPC: H01J35/10 ,  H01J35/04

CPC classification number: H01J35/101 ,  H01J35/10 ,  H01J35/103 ,  H01J2235/1026 ,  H01J2235/1073 ,  H01J2235/1266

Abstract: In exemplary embodiments, the anode is driven by an induction motor, between the stator and rotor of which the wall of the vacuum envelope of the tube is disposed. To reduce the overall length and the lever actions of the weight of the anode which act on the bearing which are disadvantageous in this construction, the disclosure provides an annular anode which is disposed in the same plane with the drive rotor. The rotor and stator can here be surrounded by the ring of the anode or they can be secured externally about the latter. X-ray tubes in accordance with the disclosure are particularly suited for use for the purpose of medical x-ray examination.

Abstract translation: 在示例性实施例中，阳极由感应电动机驱动，在其定子和转子之间，管的真空外壳的壁被布置。 为了减小作用于轴承的阳极的重量的总长度和杠杆作用，这在该结构中是不利的，本发明提供一种与驱动转子设置在同一平面内的环形阳极。 转子和定子在这里可以被阳极的环包围，或者它们可以在外部固定在其上。 根据本公开的X射线管特别适用于医疗x射线检查的目的。