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16 条记录 (耗时 0.012 秒)

    Ring tube CT scanner
    2.
    发明公开
    Ring tube CT scanner 失效
    CT扫描仪mitringförmigerRöhre。

    公开(公告)号：EP0564292A2

    公开(公告)日：1993-10-06

    申请号：EP93302599.1

    申请日：1993-04-01

    申请人： PICKER INTERNATIONAL, INC.

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

    IPC分类号： A61B6/03 ,  G01T1/29 ,  H05G1/04

    CPC分类号： 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 ,  H01J2235/162 ,  H05G1/025 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/26 ,  H05G1/34 ,  H05G1/52 ,  H05G1/60 ,  H05G1/66

    摘要： 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 (C) which rotates a beam of electrons around the annular anode. A plurality of parallel connected voltage sources (90₁, 90₂, ..., 90 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 (FIGURES 2 and 7), nutate into the plane of the windows opposite of the origin of the x-ray beam (FIGURE 6), rotate in part (FIGURE 9) or rotate in full (FIGURE 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.

    摘要翻译： 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射线管包括使环形阳极周围的电子束旋转的环形壳体（A），环形阳极（B）和阴极（C）。 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），并撞击弧段 的辐射探测器（130）。 x射线探测器固定安装在环形窗的平面外面（图2和7），并形成与X射线束原点相反的窗口平面（图6），部分旋转 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，因此确定旋转探测器实施例中的X射线束和检测器的角位置。

    Power supplies
    4.
    发明公开
    Power supplies 失效
    Leistungsversorgungen。

    公开(公告)号：EP0592164A1

    公开(公告)日：1994-04-13

    申请号：EP93307835.4

    申请日：1993-10-01

    申请人： PICKER INTERNATIONAL, INC.

    发明人： Furbee, Avery D. ,  Miller, Lester ,  Bauer, Carl F.

    IPC分类号： H02H9/02 ,  H05G1/10 ,  H05G1/54

    CPC分类号： H05G1/10 ,  H02H9/02 ,  H05G1/54

    摘要： A high frequency voltage generator ( 10 ) produces a high positive voltage and a high negative voltage. A parallel connected coil ( 26 ) and diode ( 30 ) are connected between the high voltage supply and a target ( 44 ) of an x-ray tube ( 40 ). A second parallel connected coil ( 28 ) and diode ( 32 ) are connected between the negative voltage and an electron source ( 42 ) of the x-ray tube. The coils are preferably a multiple pancake design (FIGURE 3). When the tube starts to arc, the sudden increase in current flow through the coil is converted and stored in a magnetic field leaving only a small current to contribute to arcing. The coils are sized such that the current which passes to the x-ray tube is sufficiently small that the arcing is usually extinguished without an avalanche phenomenon occurring. The diodes permit the energy stored in the magnetic field to be converted into a current flow through the coil and diode such that the energy is dissipated as heat by the inherent electrical resistance of the coil with only a minimal amount of the energy passing over time to the x-ray tube.

    摘要翻译： 高频电压发生器（10）产生高正电压和高负电压。 并联连接的线圈（26）和二极管（30）连接在高电压源和X射线管（40）的靶（44）之间。 第二并联线圈（28）和二极管（32）连接在负电压和X射线管的电子源（42）之间。 线圈优选为多煎饼设计（图3）。 当管开始弧时，通过线圈的电流的突然增加被转换并存储在磁场中，仅留下小的电流以有助于电弧。 线圈的尺寸使得传递到X射线管的电流足够小，使得通常在没有发生雪崩现象的情况下熄灭电弧。 二极管允许存储在磁场中的能量转换成通过线圈和二极管的电流，使得能量通过线圈的固有电阻作为热量消散，只有最小量的能量随时间传递到 x射线管。

    X-ray tube with ferrite core filament transformer
    5.
    发明公开
    X-ray tube with ferrite core filament transformer 失效
    Röntgenröhremit Ferritkern-Glühwendeltransformator。

    公开(公告)号：EP0550983A1

    公开(公告)日：1993-07-14

    申请号：EP92311472.2

    申请日：1992-12-16

    申请人： PICKER INTERNATIONAL, INC.

    发明人： Burke, James E. ,  Perno, Salvatore G. ,  Miller, Lester

    IPC分类号： H01J35/24 ,  H01J35/10 ,  H05G1/06 ,  H05G1/34

    CPC分类号： H05G1/34 ,  H01J35/06 ,  H01J35/10 ,  H01J35/24 ,  H01J2235/162 ,  H05G1/06 ,  H05G1/08

    摘要： 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.

    摘要翻译： 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）。 辅助（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线圈架（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五倍的横截面以补偿初级和次级绕组之间的低的，约20％的耦合效率。 优选地，初级绕组芯使其极面相邻缩小，以将磁通聚焦到次级铁氧体磁芯的极面（72,74）。

    X-ray tube assemblies
    10.
    发明公开
    X-ray tube assemblies 失效
    Anordnung vonRöntgenröhren

    公开(公告)号：EP0715333A1

    公开(公告)日：1996-06-05

    申请号：EP95307599.1

    申请日：1995-10-25

    申请人： PICKER INTERNATIONAL, INC.

    发明人： Wandke, Norman E. ,  Burke, James E. ,  Miller, Lester ,  Perno, Salvatore

    IPC分类号： H01J35/14

    CPC分类号： H01J35/02 ,  H01J35/06 ,  H01J35/10 ,  H01J35/14 ,  H01J35/165 ,  H01J35/24 ,  H01J35/26 ,  H01J2235/10 ,  H01J2235/162 ,  H05G1/025 ,  H05G1/04 ,  H05G1/06 ,  H05G1/08 ,  H05G1/20 ,  H05G1/34 ,  H05G1/52 ,  H05G1/66

    摘要： An x-ray tube assembly includes an anode (A) and an envelope (C). A cathode assembly (B) including a cathode (12), which is supported in the envelope on a bearing (32), emits a beam of electrons which strike the anode forming a focal spot (14). The anode rotates relative to the cathode such that focal spot follows a generally annular path along an annular face (16) of the anode. If the axis of the anode and the cathode assembly are screwed or offset, the focal spot path is not circular and wobbles. An adjustment assembly (60) allows adjustment of the relative positions of the anode, the cathode and the envelope to adjust the anode and cathode assembly axes. Another adjustment assembly including one or more electrodes (102, 108) adjusts the position of the focal spot. A control circuit (110) applies an electrostatic potential to the electrodes to move the focal spot such that it stays on a constant plane of the annular face of the anode.An angular position encoder (106) identifies the angular orientation of the anode.

    摘要翻译： X射线管组件包括阳极（A）和外壳（C）。 包括阴极（12）的阴极组件（B），其被支撑在轴承（32）上的外壳中，发射撞击阳极的电子束，形成焦点（14）。 阳极相对于阴极旋转，使得焦点沿着沿着阳极的环形面（16）的大致环形路径。 如果阳极和阴极组件的轴线被拧紧或偏移，则焦点路径不是圆形并且摆动。 调节组件（60）允许调节阳极，阴极和外壳的相对位置，以调节阳极和阴极组件的轴线。 包括一个或多个电极（102,108）的另一调节组件调节焦点的位置。 控制电路（110）向电极施加静电电位以使焦点移动，使其停留在阳极的环形面的恒定平面上。角位置编码器（106）识别阳极的角度取向。