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    X-ray tube liquid metal bearing structure for reducing trapped gases
    2.
    发明授权
    X-ray tube liquid metal bearing structure for reducing trapped gases 有权

    公开(公告)号：US11676791B2

    公开(公告)日：2023-06-13

    申请号：US17181303

    申请日：2021-02-22

    Applicant: GE Precision Healthcare LLC

    Inventor： Ian Strider Hunt ,  Andrew Thomas Cross

    IPC: H01J35/02 ,  F16C17/10 ,  F16C33/10

    CPC classification number: H01J35/02 ,  F16C17/102 ,  F16C33/1065

    Abstract: A bearing structure for an X-ray tube is provided that includes a journal bearing shaft with a radially protruding thrust bearing encased within a bearing sleeve, one of which rotates relative to the other. The stationary component, e.g., the journal bearing and/or the thrust bearing includes at least one vent groove formed therein that improves the ability of the journal bearing structure to enable gases trapped by the liquid metal within the bearing assembly to escape through the vent groove to the exterior of the X-ray tube. By adding a strategically located channel or vent groove of sufficient size in at least one of the journal bearing or the thrust bearing, the pressures resisted by the seal created between the liquid metal and the vent groove(s) in the bearing components is significantly reduced, allowing escape of the gases to avoid detrimental effects to the operation of the X-ray tube, while maintaining the load carrying capacity of the bearing assembly.

    X-RAY DETECTOR, IMAGING APPARATUS AND CALIBRATION METHOD
    4.
    发明申请
    X-RAY DETECTOR, IMAGING APPARATUS AND CALIBRATION METHOD 有权

    公开(公告)号：US20170285186A1

    公开(公告)日：2017-10-05

    申请号：US15114444

    申请日：2015-12-09

    Applicant: KONINKLIJKE PHILIPS N.V.

    Inventor： Ewald ROESSL ,  Heiner DAERR

    IPC: G01T1/24 ,  H05G1/08

    CPC classification number: G01T1/24 ,  A61B6/585 ,  G01T7/005 ,  H01J35/02 ,  H05G1/08

    Abstract: The present invention relates to an X-ray detector comprising a directly converting semiconductor layer (60) having a plurality of pixels for converting incident radiation into electrical measurement signals with a band gap energy characteristic of the semiconductor layer, wherein said incident radiation is x-ray radiation emitted by an x-ray source (2) or light emitted by at least one light source (30, 33). Further, an evaluation unit (67) is provided for calculating evaluation signals per pixel or group of pixels from first electrical measurement signals generated per pixel or group of pixels when light from said at least one light source at a first intensity is coupled into the semiconductor layer and second electrical measurement signals generated per pixel or group of pixels when light from said at least one light source at a second intensity is coupled into the semiconductor layer, wherein said evaluation unit is configured to detect per pixel or group of pixels a noise peak in said first and second electrical measurement signals and to determine offset and gain per pixel or group of pixels from the detected noise peaks. A detection unit (69) is provided for determining detection signals from electrical measurement signals generated when x-ray radiation is incident onto the semiconductor layer, and a calibration unit (68) is provided for calibrating the detection unit on the basis of the evaluation signals.

    X-ray generator and X-ray imaging apparatus
    5.
    发明授权
    X-ray generator and X-ray imaging apparatus 有权
    X射线发生器和X射线成像装置

    公开(公告)号：US09570264B2

    公开(公告)日：2017-02-14

    申请号：US14241417

    申请日：2012-08-29

    Applicant: Takao Ogura ,  Yasue Sato

    Inventor： Takao Ogura ,  Yasue Sato

    IPC: H01J35/02 ,  H01J35/08 ,  G01N23/04 ,  H01J35/14

    CPC classification number: H01J35/02 ,  G01N23/04 ,  H01J35/08 ,  H01J35/14 ,  H01J2235/087 ,  H01J2235/186

    Abstract: Provided is an X-ray generator which includes:an electron path 8; a target 9c disposed on a substrate 9a, in which electrons having passed through the electron path 8 are made to emit at the target 9c and to generate an X-ray, wherein: the target 9c is disposed at the central area of the substrate 9a; at least a part of a peripheral area of the substrate 9a which is not covered with the target 9c has higher transmittance than that of the central area of the substrate 9a covered with the target 9c, with respect to the X-ray generated when electrons having reflected from the target enter an inner wall of the electron path. X-ray generation efficiency may be improved by effectively using electrons reflected off the target 9c.

    Abstract translation: 电子通路8; 设置在基板9a上的目标9c，其中通过电子通道8的电子在靶9c处发射并产生X射线，其中：靶9c设置在基板9a的中心区域 ; 基板9a的未被靶9c覆盖的周边区域的至少一部分相对于被靶9c覆盖的基板9a的中心区域的透射率的透射率高于电子具有的X射线 从目标反射进入电子通道的内壁。 可以通过有效地使用从靶9c反射的电子来提高X射线产生效率。

    Dynamic Dose Reduction in X-Ray Inspection
    6.
    发明申请
    Dynamic Dose Reduction in X-Ray Inspection 审中-公开
    X射线检查中动态剂量降低

    公开(公告)号：US20160260572A1

    公开(公告)日：2016-09-08

    申请号：US15156895

    申请日：2016-05-17

    Applicant: American Science and Engineering, Inc.

    Inventor： Dan-Cristian Dinca ,  Martin Rommel

    IPC: H01J35/02 ,  G01V5/00 ,  G01N23/04

    CPC classification number: H01J35/02 ,  G01N23/04 ,  G01V5/0016

    Abstract: Methods and an x-ray system for dynamically regulating x-ray dose. An x-ray beam is generated and collimated at a source collimator and detected after the x-ray beam traverses an inspected object. A filter may be dynamically interposed by translation of the filter between a focal spot of the source and the source collimator in such a manner as to maintain the portion of the x-ray beam that traverses the inspected object below a specified limit. Alternatively, an aperture of the source collimator may be varied in size or position relative to the focal spot.

    Abstract translation: 方法和x射线系统，用于动态调节x射线剂量。 X射线束在源准直器处产生并准直，并在X射线束穿过检测对象之后检测。 过滤器可以通过在源的焦点和源准直仪之间平移过滤器而被动态地插入，以使得将穿过检测对象的X射线束的部分保持在指定极限以下。 或者，源准直仪的孔径可以在相对于焦斑的尺寸或位置上变化。

    Radiation Generator With Frustoconical Electrode Configuration
    7.
    发明申请
    Radiation Generator With Frustoconical Electrode Configuration 有权
    具有截面电极配置的辐射发生器

    公开(公告)号：US20160133428A1

    公开(公告)日：2016-05-12

    申请号：US14539685

    申请日：2014-11-12

    Applicant: Schlumberger Technology Corporation

    Inventor： Jani Reijonen

    IPC: H01J35/04 ,  H01J35/16 ,  H01J9/18 ,  G01V5/12

    CPC classification number: G01V5/04 ,  G01V5/125 ,  H01J35/00 ,  H01J35/02 ,  H01J35/025 ,  H01J35/04 ,  H01J35/045 ,  H01J35/14 ,  H01J35/16 ,  H01J35/32

    Abstract: A radiation generator may include an elongate generator housing having a proximal end and a distal end, a target electrode within the elongate generator housing at the distal end thereof, a charged particle source within the elongate generator housing at the proximal end thereof to direct charged particles at the target electrode. A plurality of accelerator electrodes may be spaced apart within the elongate generator housing between the target electrode and the charged particle source to define a charged particle accelerator section. Each accelerator electrode may include an annular portion having a first opening therein, and a frustoconical portion having a base coupled to the first opening of the annular portion and having a second opening so that charged particles from the charged particle source pass through the first and second openings to reach the target electrode.

    Abstract translation: 辐射发生器可以包括具有近端和远端的细长的发生器壳体，在其远端处的细长发生器壳体内的靶电极，在其近端处的细长发生器壳体内的带电粒子源以引导带电粒子 在目标电极处。 多个加速器电极可以在细长发生器壳体内在目标电极和带电粒子源之间间隔开，以限定带电粒子加速器部分。 每个加速器电极可以包括其中具有第一开口的环形部分和截头圆锥形部分，其具有联接到环形部分的第一开口的基部，并且具有第二开口，使得带电粒子源的带电粒子通过第一和第二 开口到达目标电极。

    FRICTION DRIVEN X-RAY SOURCE
    8.
    发明申请
    FRICTION DRIVEN X-RAY SOURCE 审中-公开

    公开(公告)号：US20160088719A1

    公开(公告)日：2016-03-24

    申请号：US14958077

    申请日：2015-12-03

    Applicant: Tribogenics, Inc.

    Inventor： Carlos Camara ,  Mark G. Valentine

    IPC: H05G2/00

    CPC classification number: H05G2/00 ,  H01J35/02 ,  H01J35/16

    Abstract: A high energy radiation generator utilizes sliding friction in a low pressure environment to generate high energy radiation, for example x-rays. The sliding friction may be generated by sweeping one material against a second material, for example rotating a surface of a rotor against a membrane, in the presence of an electron target, which may be one of the first material or the second material, or a different material.

    RADIATION GENERATING APPARATUS AND RADIOGRAPHIC APPARATUS
    10.
    发明申请
    RADIATION GENERATING APPARATUS AND RADIOGRAPHIC APPARATUS 审中-公开
    辐射发生装置和放射性装置

    公开(公告)号：US20130182826A1

    公开(公告)日：2013-07-18

    申请号：US13741754

    申请日：2013-01-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Kazuyuki Ueda ,  Koji Yamazaki

    IPC: H01J35/02

    CPC classification number: H01J35/02 ,  H05G1/025

    Abstract: Radiation generating apparatus includes an envelope and a radiation tube disposed inside the envelop. A cooler is connected to the envelope at an inlet port and an outlet port. Coolant circulates between the cooler and the envelope through the inlet port and outlet port. A partition plate divides the inside of the envelope into a first chamber on the side of the radiation tube and a second chamber on the side of the inlet port. An air bubble chamber provided at an upper portion of the second chamber collects air bubbles formed in the coolant. A protrusion projecting toward the second chamber is provided at an end of the partition plate on the side of the opening. Since the air bubbles are moved due to buoyancy force or inertial force when the apparatus is rotated, it is possible to prevent radiation from passing through the air bubbles.

    Abstract translation: 辐射发生装置包括外壳和设置在封套内的辐射管。 冷却器在入口端口和出口端口连接到信封。 冷却液通过入口和出口在冷却器和信封之间循环。 分隔板将封套的内部分成放射管侧的第一室和在入口侧的第二室。 设置在第二室的上部的气泡室收集形成在冷却剂中的气泡。 在分隔板的开口侧的端部设置有朝向第二室突出的突起。 由于当设备旋转时气泡由于浮力或惯性力而移动，所以可以防止辐射通过气泡。

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