-
11.发明申请公开(公告)号：US20150187530A1
公开(公告)日：2015-07-02
申请号：US14660607
申请日：2015-03-17
摘要： An electron emitter can include: a plurality of elongate rungs connected together end to end from a first emitter end to a second emitter end in a plane so as to form a planar pattern; a plurality of corners, wherein each elongate rung is connected to another elongate rung through a corner having a corner apex and an opposite corner nadir; a first gap between adjacent non-connected elongate rungs, wherein the first gap extends from the first emitter end to a middle rung; a second gap between adjacent non-connected elongate rungs, wherein the second gap extends from the second emitter end to the middle rung, wherein the first gap does not intersect the second gap; and one or more cutouts at one or more of the corners of the plurality of corners between the corner apex and corner nadir or at the corner nadir.
摘要翻译： 电子发射器可以包括：多个细长梯级，从平面上的第一发射端到第二发射端端对端连接在一起，以形成平面图形; 多个角部，其中每个细长梯级通过具有角顶点和相对的角落最低点的拐角连接到另一细长梯级; 相邻的非连接细长梯级之间的第一间隙，其中所述第一间隙从所述第一发射端延伸到中间梯级; 相邻的非连接细长梯级之间的第二间隙，其中所述第二间隙从所述第二发射端延伸到所述中间梯级，其中所述第一间隙不与所述第二间隙相交; 以及在角顶点和角落最低点之间的多个角落的一个或多个拐角处的一个或多个切口或在角落最低点处。
-
公开(公告)号：US08995622B2
公开(公告)日：2015-03-31
申请号：US13373554
申请日：2011-11-18
申请人： David L. Adler , Wenbing Yun , Thomas Anthony Case
发明人： David L. Adler , Wenbing Yun , Thomas Anthony Case
CPC分类号： H01J35/08 , H01J35/14 , H01J2235/087 , H01J2235/186 , H05G1/52
摘要： An x-ray source is described. During operation of the x-ray source, an electron source emits a beam of electrons. This beam of electrons is focused to a spot on a target by a magnetic focusing lens. In response to receiving the beam of focused electrons, the target provides a transmission source of x-rays. Moreover, a repositioning mechanism selectively repositions the beam of focused electrons to different locations on a surface of the target based on a feedback parameter associated with operation of the x-ray source. This feedback parameter may be based on: an intensity of the x-rays output by the x-ray source; a position of the x-rays output by the x-ray source; an elapsed time during operation of the x-ray source; a cross-sectional shape of the x-rays output by the x-ray source; and/or a spot size of the x-rays output by the x-ray source.
摘要翻译： 描述了x射线源。 在x射线源的操作期间，电子源发射电子束。 该电子束通过磁聚焦透镜聚焦到目标上的点。 响应于接收聚焦电子束，目标提供x射线的透射源。 此外，重新定位机构基于与x射线源的操作相关联的反馈参数，有选择地将聚焦电子束重新定位在目标表面上的不同位置。 该反馈参数可以基于：由x射线源输出的x射线的强度; 由x射线源输出的x射线的位置; 在x射线源的操作期间经过的时间; 由x射线源输出的x射线的横截面形状; 和/或由x射线源输出的x射线的斑点大小。
-
公开(公告)号：US20150084502A1
公开(公告)日：2015-03-26
申请号：US14494337
申请日：2014-09-23
CPC分类号： H03F3/211 , H01J29/58 , H02M1/088 , H02M3/158 , H03F3/08 , H03F3/2173 , H03F2200/93 , H03F2203/21142 , H05G1/52
摘要： A rapidly regulable high-voltage supply for the electrical focusing of an electron beam using a high-voltage final stage is provided. The high-voltage final stage includes a plurality of amplification elements that are interconnected in a series configuration with a first high-voltage connection, and a potential dividing chain including a series of potential dividing elements. The potential dividing chain is interconnected with the first high-voltage connection and has a signal interconnection with the plurality of amplification elements, so that when a voltage is applied across the potential dividing chain, a difference in voltages between a signal input to any amplification element of the plurality of amplification elements and a signal input to a next amplification element of the plurality of amplification elements has a same sign.
摘要翻译： 提供了用于使用高压末级的电子束的电聚焦的快速调节的高压电源。 高电压最终级包括以串联配置与第一高压连接互连的多个放大元件和包括一系列电势分压元件的电势分压链。 电势分压链与第一高压连接互连，并且与多个放大元件具有信号互连，使得当跨越电势分压链施加电压时，输入到任何放大元件的信号之间的电压差 并且输入到所述多个放大元件的下一个放大元件的信号具有相同的符号。
-
公开(公告)号：US08831179B2
公开(公告)日：2014-09-09
申请号：US13066679
申请日：2011-04-21
申请人： David L. Adler , Wenbing Yun , Thomas Anthony Case
发明人： David L. Adler , Wenbing Yun , Thomas Anthony Case
CPC分类号： H01J35/08 , H01J35/14 , H01J2235/087 , H01J2235/186 , H05G1/52
摘要： During operation of an x-ray source, an electron source emits a beam of electrons. Moreover, a repositioning mechanism selectively repositions the beam of electrons on a surface of a target based on a feedback parameter, where a location of the beam of electrons on the surface of the target defines a spot size of x-rays output by the x-ray source. In response to receiving the beam of electrons, the target provides a transmission source of the x-rays. Furthermore, a beam-parameter detector provides the feedback parameter based on a physical characteristic associated with the beam of electrons and/or the x-rays output by the x-ray source. This physical characteristic may include: at least a portion of an optical spectrum emitted by the target, secondary electrons emitted by the target based on a cross-sectional shape of the beam of electrons; an intensity of the x-rays output by the target; and/or a current from the target.
摘要翻译： 在x射线源的操作期间，电子源发射电子束。 此外，重新定位机构基于反馈参数选择性地重新定位靶的表面上的电子束，其中目标表面上的电子束的位置限定由x轴输出的x射线的光斑尺寸， 射线源。 响应于接收到电子束，目标提供x射线的透射源。 此外，光束参数检测器基于与电子束相关联的物理特性和/或由x射线源输出的x射线提供反馈参数。 该物理特性可以包括：由目标发射的光谱的至少一部分，基于电子束的横截面形状由靶发射的二次电子; 目标输出的x射线的强度; 和/或来自目标的电流。
-
15.发明授权公开(公告)号：US08360640B2
公开(公告)日：2013-01-29
申请号：US12521622
申请日：2007-12-28
申请人： Alfred Reinhold
发明人： Alfred Reinhold
摘要： The invention relates to an X-ray tube, especially a microfocus X-ray tube (2), comprising means (18) for orienting an electron beam (10) towards a target (4). A control device (20) is used to control the means for orienting the electron beam (10) towards the target (4) in such a way that the electron beam (10) scans the target (4), in addition to a measuring device (22) for measuring the intensity of the target current which flows to different scanning sites when the target (4) is scanned by the electron beam (10), or a measuring variable dependent on the target current, and an evaluation device (24) for associating each measured value of the target flow with the corresponding scanning site. Said X-ray tube enables the easy and economical implementation of a method for checking the operability of the target (4).
摘要翻译： 本发明涉及一种X射线管，特别是微焦X射线管（2），其包括用于使电子束（10）朝向靶（4）定向的装置（18）。 控制装置（20）用于控制用于使电子束（10）朝向目标（4）定向的装置，使得电子束（10）扫描靶（4），除了测量装置 （22），用于测量当通过电子束（10）扫描目标（4）时流动到不同扫描位置的目标电流的强度或取决于目标电流的测量变量，以及评估装置（24） 用于将目标流的每个测量值与相应的扫描位置相关联。 所述X射线管使得能够容易且经济地实现用于检查目标（4）的可操作性的方法。
-
公开(公告)号：US08300768B2
公开(公告)日：2012-10-30
申请号：US12868437
申请日：2010-08-25
IPC分类号： H01J35/00
CPC分类号： A61B6/032 , A61B6/4021 , H01J35/04 , H01J35/06 , H01J35/14 , H01J35/30 , H01J2235/06 , H05G1/52
摘要： An X-ray tube includes: a Wehnelt electrode having a dent inside; a filament arranged in the dent of the Wehnelt electrode and configured to emit an electron beam when electricity is passed therethrough; an anode configured to emit an X-ray in response to the incident electron beam; an electrode part configured by at least one pair of electrode members, the electrode members facing each other across a path of the electron beam, a voltage being applied to each of the electrode members; a voltage controller configured to control the voltage applied to the electrode part; and a shield member arranged in contact with the Wehnelt electrode and configured to cover part of the dent by a projecting part.
摘要翻译： X射线管包括：具有凹陷的Wehnelt电极; 布置在Wehnelt电极的凹陷中并构造成当电流通过时发射电子束的灯丝; 配置为响应于入射电子束发射X射线的阳极; 电极部件，由至少一对电极部件构成，所述电极部件跨越所述电子束的路径彼此面对，对每个所述电极部件施加电压; 电压控制器，被配置为控制施加到所述电极部分的电压; 以及屏蔽构件，其布置成与所述Wehnelt电极接触并且构造成通过突出部覆盖所述凹陷的一部分。
-
公开(公告)号：US20120269326A1
公开(公告)日：2012-10-25
申请号：US13373555
申请日：2011-11-18
IPC分类号： H01J35/14
CPC分类号： H01J35/08 , H01J35/116 , H01J35/14 , H01J35/186 , H05G1/52
摘要： An x-ray source is described. This x-ray source includes an electron source with a refractory binary compound having a melting temperature greater than that of tungsten. For example, the refractory binary compound may include: hafnium carbide, zirconium carbide, tantalum carbide, lanthanum hexaboride and/or compounds that include two or more of these elements.
摘要翻译： 描述了x射线源。 该X射线源包括具有熔融温度大于钨的熔融温度的难熔二元化合物的电子源。 例如，耐火二元化合物可以包括：碳化铪，碳化锆，碳化钽，六硼化镧和/或包括这些元素中的两种或更多种的化合物。
-
公开(公告)号：US20110051884A1
公开(公告)日：2011-03-03
申请号：US12868437
申请日：2010-08-25
CPC分类号： A61B6/032 , A61B6/4021 , H01J35/04 , H01J35/06 , H01J35/14 , H01J35/30 , H01J2235/06 , H05G1/52
摘要： An X-ray tube includes: a Wehnelt electrode having a dent inside; a filament arranged in the dent of the Wehnelt electrode and configured to emit an electron beam when electricity is passed therethrough; an anode configured to emit an X-ray in response to the incident electron beam; an electrode part configured by at least one pair of electrode members, the electrode members facing each other across a path of the electron beam, a voltage being applied to each of the electrode members; a voltage controller configured to control the voltage applied to the electrode part; and a shield member arranged in contact with the Wehnelt electrode and configured to cover part of the dent by a projecting part.
摘要翻译： X射线管包括：具有凹陷的Wehnelt电极; 布置在Wehnelt电极的凹陷中并构造成当电流通过时发射电子束的灯丝; 配置为响应于入射电子束发射X射线的阳极; 电极部件，由至少一对电极部件构成，所述电极部件跨越所述电子束的路径彼此面对，对每个所述电极部件施加电压; 电压控制器，被配置为控制施加到所述电极部分的电压; 以及屏蔽构件，其布置成与所述Wehnelt电极接触并且构造成通过突出部覆盖所述凹陷的一部分。
-
19.发明授权Systems and methods for scanning and data acquisition in computed tomography (CT) applications 有权计算机断层扫描（CT）应用中扫描和数据采集的系统和方法公开(公告)号：US07782999B2
公开(公告)日：2010-08-24
申请号：US12096443
申请日：2006-09-16
申请人： Astrid Lewalter , Rainer Pietig , Guenter Zeitler , Kai Eck , Christoph Herrmann , Rainer Kiewitt , Christoph Loef , Oliver Muelhens , Carolina Ribbing , Georg Rose , Matthias Simon , Olaf Wischhusen
发明人： Astrid Lewalter , Rainer Pietig , Guenter Zeitler , Kai Eck , Christoph Herrmann , Rainer Kiewitt , Christoph Loef , Oliver Muelhens , Carolina Ribbing , Georg Rose , Matthias Simon , Olaf Wischhusen
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4021 , A61B6/503 , A61B6/504 , H01J2235/086 , H05G1/52
摘要： Systems and methods for data acquisition in computed tomography (CT) applications are provided. The systems and methods are particularly adapted for scanning and acquiring/processing data in connection with high-power cone-beam CT applications. The electron beam is moved/scanned along the anode surface to multiple focal positions. Data acquisition for a full projection at one focus position and one view angle is achieved by activating each focus position multiple times during the data acquisition for one angle of the gantry. The detector array and associated data processing system are adapted to rapidly switch between the different focus positions during the acquisitions for one view angle and to collect all data belonging to the same projection into the same data set. Adaptive electron optics are utilized to move/scan the electron beam along the anode surface to the various focus positions. Alternatively, a plurality of cathodes may be provided for respective focus positions and the system may support fast switching therebetween to achieve desirably short spot times. The disclosed CT system permits greater power densities without risk of heat damage to the anode and effectively increases the track velocity of the electron beam on the anode surface. The CT system and associated data acquisition methods have particular utility in CT applications requiring increased time resolution and/or spatial resolution, e.g., cardiac CT applications.
摘要翻译： 提供了计算机断层摄影（CT）应用中数据采集的系统和方法。 该系统和方法特别适用于扫描和获取/处理与大功率锥束CT应用有关的数据。 电子束沿着阳极表面移动/扫描到多个焦点位置。 通过在台架的一个角度的数据采集过程中激活每个聚焦位置多次来实现在一个聚焦位置和一个视角下的全投影的数据采集。 检测器阵列和相关联的数据处理系统适于在一次视角的采集期间在不同聚焦位置之间快速切换，并且将属于相同投影的所有数据收集到同一数据集中。 使用自适应电子光学器件将电子束沿着阳极表面移动/扫描到各种焦点位置。 或者，可以为各个焦点位置设置多个阴极，并且系统可以支持它们之间的快速切换，以实现期望的短光斑时间。 所公开的CT系统允许更大的功率密度，而不会对阳极造成热损害的风险，并且有效地增加阳极表面上的电子束的轨道速度。 CT系统和相关数据采集方法在需要增加时间分辨率和/或空间分辨率（例如心脏CT应用）的CT应用中具有特别的用途。
-
20.发明申请METHOD FOR STABILIZING THE SIZE OF A FOCAL SPOT OF AN X-RAY TUBE, AND X-RAY TUBE COMPRISING SUCH A METHOD 有权用于稳定X射线管的焦点尺寸的方法和包含这种方法的X射线管公开(公告)号：US20070258564A1
公开(公告)日：2007-11-08
申请号：US11737404
申请日：2007-04-19
申请人： Christelle Gaudin , Philippe Blin
发明人： Christelle Gaudin , Philippe Blin
IPC分类号： H01J35/14
摘要： In a method for stabilizing the size of a focal spot of an X-ray tube and contrast modulation function of a X-ray tube, the tube has a cathode comprising a concentrator and a heating filament. It has an anode is placed so as to be facing the cathode. With the filament, the cathode produces an electron beam bombarding the focal spot of the anode. A bias voltage is applied between a terminal of the filament and a terminal of the concentrator. The tube has means to measure the size of the focal spot and the function of contrast modulation. It also has means to regulate the size of the focal spot and the contrast modulation function by means of a bias voltage.
摘要翻译： 在用于稳定X射线管的焦点尺寸和X射线管的对比度调制功能的方法中，该管具有包括集中器和加热丝的阴极。 其阳极被放置成面向阴极。 对于灯丝，阴极产生电子束轰击阳极的焦点。 在灯丝的端子和集电器的端子之间施加偏置电压。 该管具有测量焦斑尺寸和对比度调制功能的手段。 它还具有通过偏置电压调节焦点的尺寸和对比度调制功能的手段。
-
-
-
-
-
-
-
-
-
搜索结果
230 条记录 (耗时 0.04 秒)
