-
公开(公告)号：US07742573B2
公开(公告)日：2010-06-22
申请号：US12253438
申请日：2008-10-17
摘要： A system is provided, which includes a rotatable gantry for receiving an object to be scanned. The system includes an x-ray source for projecting x-rays of two different energy levels towards the object and also a power supply, which energizes the x-ray source to two different voltage levels at a predetermined rate for generating x-rays at two different energy levels. The power supply in the system includes a fixed voltage source to input a voltage to a switching module with number of identical switching stages. Each stage in the switching module consists of a first switch, which charges a capacitor in a conducting state and output a first voltage, a second switch, which connects the fixed voltage source and the capacitor in series to output a second voltage in a conducting state and a diode which blocks a reverse current from the capacitor to the power supply.
摘要翻译： 提供了一种系统，其包括用于接收待扫描物体的可旋转机架。 该系统包括用于将两个不同能级的x射线投射到物体的X射线源，还有一个电源，其以预定的速率将X射线源激励到两个不同的电压电平，以在两个处产生x射线 不同的能量水平。 系统中的电源包括一个固定电压源，用于向具有相同开关级数的开关模块输入电压。 开关模块中的每个级包括一个第一开关，其对导通状态的电容器进行充电并输出第一电压，第二开关，其将固定电压源和电容器串联连接以输出导通状态的第二电压 以及阻挡从电容器到电源的反向电流的二极管。
-
公开(公告)号：US07218700B2
公开(公告)日：2007-05-15
申请号：US11048158
申请日：2005-02-01
申请人： William Hullinger Huber , Colin Richard Wilson , John Scott Price , Peter Michael Edic , Mark Ernest Vermilyea
发明人： William Hullinger Huber , Colin Richard Wilson , John Scott Price , Peter Michael Edic , Mark Ernest Vermilyea
IPC分类号： A61B6/00
CPC分类号： H01J35/06 , H01J35/14 , H01J35/16 , H01J35/30 , H01J2235/068
摘要： A system and method for forming x-rays. One exemplary system includes a target and electron emission subsystem with a plurality of electron sources. Each of the plurality of electron sources is configured to generate a plurality of discrete spots on the target from which x-rays are emitted. Another exemplary system includes a target, an electron emission subsystem with a plurality of electron sources, each of which generates at least one of the plurality of spots on the target, and a transient beam protection subsystem for protecting the electron emission subsystem from transient beam currents, material emissions from the target, and electric field transients.
摘要翻译： 一种用于形成x射线的系统和方法。 一个示例性系统包括具有多个电子源的靶和电子发射子系统。 多个电子源中的每一个被配置为在从其发射X射线的目标上产生多个离散点。 另一个示例性系统包括目标，具有多个电子源的电子发射子系统，每个电子源产生目标上的多个点中的至少一个，以及用于保护电子发射子系统免受瞬态束电流的瞬态波束保护子系统 ，目标物质排放和电场瞬变。
-
3.发明授权Method for energy sensitive computed tomography using checkerboard filtering 有权使用棋盘过滤的能量敏感计算机断层扫描方法公开(公告)号：US08111803B2
公开(公告)日：2012-02-07
申请号：US12432225
申请日：2009-04-29
IPC分类号： G01N23/087 , G21K5/10 , H05G1/64
CPC分类号： G21K1/10 , A61B6/032 , A61B6/4035 , A61B6/482 , G01N2223/419 , G01N2223/423
摘要： Methods for energy-sensitive computed tomography systems that use checkerboard filtering. A method of enhancing image analysis of projection data acquired using a detector configured with a checkerboard filter includes disposing in a system a detector to receive a transmitted beam of X-rays traversing through an object, where the system is configured so the detector receives both high- and one of total- and low-energy projection data; receiving the high- and one of total- and low-energy projection data at the detector; and then estimating an effective atomic number of the object and/or processing the projection data so as to mitigate reconstruction artifacts. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appended claims.
摘要翻译： 使用棋盘过滤的能量敏感计算机断层摄影系统的方法。 使用配置有棋盘滤波器的检测器获取的投影数据的图像分析增强方法包括在系统中设置检测器以接收穿过物体的X射线的透射束，其中系统配置为使得检测器接收高 - 和总能量和低能量投影数据之一; 在检测器处接收高能量投影数据和低能量投影数据之一; 然后估计对象的有效原子数和/或处理投影数据，以便减轻重建伪像。 已经根据具体实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代物和修改是可能的并且在所附权利要求的范围内。
-
公开(公告)号：US20110142201A1
公开(公告)日：2011-06-16
申请号：US12638471
申请日：2009-12-15
申请人： Jeffrey Wayne Eberhard , Bernhard Erich Hermann Claus , Colin Richard Wilson , Kedar Bhalchandra Khare
发明人： Jeffrey Wayne Eberhard , Bernhard Erich Hermann Claus , Colin Richard Wilson , Kedar Bhalchandra Khare
IPC分类号： G01N23/04
CPC分类号： G01V5/0008
摘要： A multi-view imaging system and method is disclosed. The system comprises: multiple X-ray sources emitting X-rays in a fan-shaped beam each having a first and a second beam edge defining a fan beam angle located in a predetermined configuration around an imaging volume; a system controller configured to operate the X-ray sources; detectors, to detect X-rays and configured to generate signals in response to the detected X-rays, wherein each of the plurality of X-ray sources are configured to emit X-rays to one or more detectors, further wherein the X-ray source and two end points of a corresponding detector define a fan beam plane, further wherein a line extending from the X-ray source within the fan beam plane and through the imaging volume defines a projection direction, wherein adjacent projection directions define an angular spacing; an object conveyance device configured for transporting an object along a path of travel through the imaging volume between the X-ray sources and the detectors; and a detector interface configured to acquire the signals from the detectors, wherein the predetermined configuration is defined wherein either: the projection directions when viewed along a longitudinal axis of the image system surround the imaging volume by an angular range of about 180 degrees; or the projection directions when viewed along a longitudinal axis of the image system surround the imaging volume by an angular range of about 180°−180/Q, wherein Q is a quantity of the projection directions.
摘要翻译： 公开了一种多视点成像系统和方法。 该系统包括：多个X射线源在扇形光束中发射X射线，每个X射线源具有限定围绕成像体积的预定构型的扇形束角度的第一和第二光束边缘; 被配置为操作所述X射线源的系统控制器; 检测器，用于检测X射线并被配置为响应于检测到的X射线产生信号，其中多个X射线源中的每一个被配置为向一个或多个检测器发射X射线，其中X射线 相应检测器的源极和两个端点限定了扇形光束平面，其中，从扇形光束平面内的X射线源延伸并穿过成像体积的线限定了投射方向，其中相邻的投射方向限定角度间隔; 物体输送装置，被配置为沿着X射线源和检测器之间的成像体积沿行进路径传送物体; 以及检测器接口，被配置为从所述检测器获取信号，其中限定所述预定配置，其中：沿着所述图像系统的纵轴观察的投影方向围绕所述成像体积约180度的角度范围; 或者沿着图像系统的纵轴观察时的投影方向围绕成像体积约180°-180 / Q的角度范围，其中Q是投影方向的量。
-
公开(公告)号：US07123689B1
公开(公告)日：2006-10-17
申请号：US11172749
申请日：2005-06-30
申请人： Colin Richard Wilson
发明人： Colin Richard Wilson
CPC分类号： H01J35/065 , H01J35/20 , H01J2235/062 , H01J2235/068 , H01J2235/20
摘要： In accordance with one embodiment, the present technique provides an X-ray source. The X-ray source includes a field emitter array having a plurality of field emitter elements disposed in a vacuum chamber and configured to emit electrons in the vacuum chamber towards an anode assembly. The X-ray source also includes an anode disposed in the vacuum chamber for receiving the electrons emitted by the field emitter array and configured to thereby generate X-ray radiation. The X-ray source further includes a source of cleaning gas coupled to the vacuum chamber, wherein the source of cleaning gas is configured to provide the cleaning gas to the vacuum chamber towards the field emitter array to reduce deposition of contaminants on or to clean contaminates from the field emitter array.
摘要翻译： 根据一个实施例，本技术提供X射线源。 X射线源包括场发射器阵列，其具有设置在真空室中的多个场致发射体元件，并被配置为在真空室中朝向阳极组件发射电子。 X射线源还包括设置在真空室中的阳极，用于接收由场发射器阵列发射的电子并且被配置为由此产生X射线辐射。 X射线源还包括耦合到真空室的清洁气体源，其中清洁气体源被配置为向真空室提供清洁气体朝向场发射器阵列，以减少污染物沉积在污染物上或清洁污染物 从场发射器阵列。
-
公开(公告)号：US07027559B2
公开(公告)日：2006-04-11
申请号：US10732840
申请日：2003-12-10
IPC分类号： H01J35/30
CPC分类号： A61B6/032 , A61B6/4021 , A61B6/4488 , H01J35/06 , H01J35/08 , H01J35/14
摘要： A method and apparatus for generating x-ray beams are described. In one embodiment, the method includes operating a cathode to operating a cathode to generate an electron beam, directing the electron beam from the cathode through a selectable shaped aperture in an accelerating electrode, and impinging the electron beam at a low angle on an anode surface to form a focal spot on the anode surface.
摘要翻译： 描述用于产生X射线束的方法和装置。 在一个实施例中，该方法包括操作阴极以操作阴极以产生电子束，将来自阴极的电子束通过加速电极中的可选择的成形孔引导，并将电子束以低角度撞击在阳极表面上 以在阳极表面上形成焦斑。
-
7.发明授权Method and design for electrical stress mitigation in high voltage insulators in X-ray tubes 失效X射线管高压绝缘子电压应力消除方法与设计公开(公告)号：US07020244B1
公开(公告)日：2006-03-28
申请号：US11015269
申请日：2004-12-17
申请人： Colin Richard Wilson , Yang Cao , Richard Michael Roffers , Claire Alexandra Arnott , Ian Strider Hunt
发明人： Colin Richard Wilson , Yang Cao , Richard Michael Roffers , Claire Alexandra Arnott , Ian Strider Hunt
IPC分类号： H01J35/00
CPC分类号： H01J35/06
摘要： In accordance with one embodiment, the present technique provides an X-ray tube. The X-ray tube includes an anode assembly configured to emit X-ray beams and a cathode assembly configured to emit electrons towards the anode assembly. The cathode assembly includes an insulator and a cathode post. The insulator includes a side surface, wherein the side surface includes a recessed portion. The cathode post includes a hollow interior region having an interior surface, wherein the interior surface is configured to engage with the side surface of the insulator. The cathode post may also include a foot portion that extends away from the interior surface at the end of the cathode post. The cathode post adjacent to the recessed portion of the insulator is configured to shield a triple point to reduce electrical stresses on the triple point.
摘要翻译： 根据一个实施例，本技术提供一种X射线管。 X射线管包括被配置为发射X射线束的阳极组件和被配置为向阳极组件发射电子的阴极组件。 阴极组件包括绝缘体和阴极柱。 绝缘体包括侧表面，其中侧表面包括凹部。 阴极柱包括具有内表面的中空内部区域，其中内表面构造成与绝缘体的侧表面接合。 阴极柱还可以包括在阴极柱的端部远离内表面延伸的脚部分。 邻近绝缘体的凹陷部分的阴极柱构造成屏蔽三重点以减小三重点上的电应力。
-
公开(公告)号：US06975703B2
公开(公告)日：2005-12-13
申请号：US10633251
申请日：2003-08-01
CPC分类号： H01J35/30 , H01J2235/087
摘要： A flat panel x-ray tube assembly is provided comprising a cathode assembly including a plurality of emitter elements. An anode substrate is included having a substrate upper surface facing the plurality of emitter elements and a substrate lower surface. The substrate upper surface is positioned parallel to the plurality of emitter elements. A plurality of target wells are formed in the substrate upper surface. Each of the plurality of target wells comprises a first angled side surface positioned at an acute angle relative to the substrate upper surface. A plurality of first target elements is applied to each to one of the first angled side surfaces. The first target elements generate x-rays in a direction perpendicular to the plurality of emitter elements in response to electrons received from one of the plurality of emitter elements.
摘要翻译： 提供一种平板X射线管组件，其包括包括多个发射体元件的阴极组件。 包括具有面向多个发射体元件的基板上表面和基板下表面的阳极基板。 衬底上表面平行于多个发射体元件定位。 在基板上表面形成有多个目标孔。 多个目标阱中的每一个包括相对于基板上表面以锐角定位的第一倾斜侧表面。 多个第一目标元件被施加到每个到第一倾斜侧表面中的一个。 第一目标元件响应于从多个发射体元件之一接收的电子，在垂直于多个发射极元件的方向上产生X射线。
-
公开(公告)号：US08687768B2
公开(公告)日：2014-04-01
申请号：US12972231
申请日：2010-12-17
CPC分类号： H03K3/53 , H05G1/10 , Y10T307/872
摘要： Methods and systems for passive resonant voltage switching are provided. One passive resonant switching system includes a voltage switching system having one or more passive resonant modules to provide a switching voltage output. Each of the passive resonant modules include switching devices configured to operate in open and closed states to produce first and second voltage level outputs from a voltage input. The passive resonant modules also include a capacitor connected to the one or more switching devices and configured to receive a system discharge energy during a resonant operating cycle when switching an output voltage from the first voltage level to the second voltage level, and to be recharged when switching from the second to first voltage level. The passive resonant modules further include a resonant inductor and an additional switching device.
摘要翻译： 提供了无源谐振电压切换的方法和系统。 一个无源谐振开关系统包括具有一个或多个无源谐振模块以提供开关电压输出的电压开关系统。 无源谐振模块中的每一个包括被配置为在打开和关闭状态下操作以从电压输入产生第一和第二电压电平输出的开关装置。 无源谐振模块还包括连接到一个或多个开关装置的电容器，并且被配置为在将输出电压从第一电压电平切换到第二电压电平时在谐振操作周期期间接收系统放电能量，并且当 从第二电压电平切换到第一电压电平。 无源谐振模块还包括谐振电感器和附加的开关装置。
-
公开(公告)号：US20120155614A1
公开(公告)日：2012-06-21
申请号：US12972231
申请日：2010-12-17
CPC分类号： H03K3/53 , H05G1/10 , Y10T307/872
摘要： Methods and systems for passive resonant voltage switching are provided. One passive resonant switching system includes a voltage switching system having one or more passive resonant modules to provide a switching voltage output. Each of the passive resonant modules include switching devices configured to operate in open and closed states to produce first and second voltage level outputs from a voltage input. The passive resonant modules also include a capacitor connected to the one or more switching devices and configured to receive a system discharge energy during a resonant operating cycle when switching an output voltage from the first voltage level to the second voltage level, and to be recharged when switching from the second to first voltage level. The passive resonant modules further include a resonant inductor and an additional switching device.
摘要翻译： 提供了无源谐振电压切换的方法和系统。 一个无源谐振开关系统包括具有一个或多个无源谐振模块以提供开关电压输出的电压开关系统。 无源谐振模块中的每一个包括被配置为在打开和关闭状态下操作以从电压输入产生第一和第二电压电平输出的开关装置。 无源谐振模块还包括连接到一个或多个开关装置的电容器，并且被配置为在将输出电压从第一电压电平切换到第二电压电平时在谐振操作周期期间接收系统放电能量，并且当 从第二电压到第一电压电平。 无源谐振模块还包括谐振电感器和附加的开关装置。
-
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.012 秒)
