公开(公告)号：US07274772B2

公开(公告)日：2007-09-25

申请号：US10854944

申请日：2004-05-27

Applicant: Stanley D. Lesiak ,  Heinz H. Busta ,  Bruce M. Zwicker

Inventor： Stanley D. Lesiak ,  Heinz H. Busta ,  Bruce M. Zwicker

IPC: H01J35/06 ,  H01J35/00 ,  G21K5/00

CPC classification number: H01J35/065 ,  G21K5/02 ,  H01J35/08 ,  H01J2235/062 ,  H01J2235/068 ,  H01J2235/086 ,  H01J2235/163

Abstract: An improved x-ray generation system produces a converging or diverging radiation pattern particularly suited for substantially cylindrical or spherical treatment devices. In an embodiment, the system comprises a closed or concave outer wall about a closed or concave inner wall. An electron emitter is situated on the inside surface of the outer wall, while a target film is situated on the outside surface of the inner wall. An extraction voltage at the emitter extracts electrons which are accelerated toward the inner wall by an acceleration voltage. Alternately, electron emission may be by thermonic means. Collisions of electrons with the target film causes x-ray emission, a substantial portion of which is directed through the inner wall into the space defined within. In an embodiment, the location of the emitter and target film are reversed, establishing a reflective rather than transmissive mode for convergent patterns and a transmissive mode for divergent patterns.

Abstract translation: 改进的X射线产生系统产生特别适用于基本上圆柱形或球形处理装置的会聚或发散辐射图。 在一个实施例中，系统包括围绕封闭或凹入的内壁的封闭或凹入的外壁。 电子发射体位于外壁的内表面上，而靶膜位于内壁的外表面上。 发射极处的提取电压提取通过加速电压向内壁加速的电子。 或者，电子发射可以通过热电偶的方式。 电子与目标膜的碰撞导致x射线发射，其大部分被引导通过内壁进入限定在其内的空间。 在一个实施例中，发射器和目标膜的位置被反转，建立用于会聚图案的反射而不是透射模式和用于发散图案的透射模式。

公开(公告)号：US20070206726A1

公开(公告)日：2007-09-06

申请号：US11601577

申请日：2006-11-17

Applicant: Jianping Lu ,  Otto Zhou ,  Qi Qiu

Inventor： Jianping Lu ,  Otto Zhou ,  Qi Qiu

IPC: G21K5/10 ,  H01J35/06 ,  H01J35/00

CPC classification number: H01J35/065 ,  G01N23/203 ,  H01J35/24 ,  H01J2235/062 ,  H01J2235/068

Abstract: Systems and methods for x-ray imaging and scanning of objects are disclosed. According to one aspect, the subject matter described herein can include providing an x-ray source configured to generate a plurality of individually-controllable x-ray beams, positioning an object to be imaged in a path for intercepting at least one of the x-ray beams, activating the x-ray source, detecting intensities of the emitted x-ray beams, and generating imaging data based on the intensities for constructing an image of the object.

Abstract translation: 公开了用于x射线成像和物体扫描的系统和方法。 根据一个方面，本文描述的主题可以包括提供被配置为产生多个可单独控制的X射线束的X射线源，将要成像的对象定位在用于截取x射线束中的至少一个的路径中， 激活X射线源，检测发射的X射线束的强度，以及基于用于构建物体的图像的强度来生成成像数据。

公开(公告)号：US20070189441A1

公开(公告)日：2007-08-16

申请号：US11674720

申请日：2007-02-14

Applicant: Stefan Popescu

Inventor： Stefan Popescu

IPC: H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC classification number: A61B6/4028 ,  A61B6/032 ,  A61B6/4488 ,  H01J35/065 ,  H05G2/001

Abstract: An x-ray computed tomography apparatus has a stationary x-ray detector that at least partially surrounds the examination volume in one plane and a stationary device for generation of x-ray radiation. The device for generation of x-ray radiation is composed of an x-ray source that extends annularly around the examination volume over an angle of at least 180° as well as one or more light scanning units with which an x-ray focus moving along the x-ray source can be generated on the x-ray target by scanning of the x-ray source with a light beam, from which x-ray target an x-ray beam is directed through the examination volume onto respective, momentarily opposite detector elements of the stationary x-ray detector. The computed tomography apparatus has one or more light scanning units are arranged and fashioned outside of a central ring axis of the x-ray source such that only an angle range

Abstract translation: X射线计算机断层摄影装置具有至少部分地围绕一个平面中的检查体积和用于产生X射线辐射的固定装置的固定x射线检测器。 用于产生X射线辐射的装置由x射线源组成，X射线源围绕检查体积围绕至少180°的角度环绕延伸，以及一个或多个光扫描单元，X射线焦点随之移动 可以通过用光束扫描x射线源来在X射线靶上产生x射线源，X射线靶从X射线瞄准X射线束穿过检查体积到相应的瞬时相对检测器 固定x射线探测器的元件。 计算机断层摄影装置具有一个或多个光扫描单元被布置和形成在x射线源的中心环轴之外，使得仅对每个光扫描单元仅扫描角度范围<360°而不与环轴相交。

公开(公告)号：US07236568B2

公开(公告)日：2007-06-26

申请号：US11087271

申请日：2005-03-23

Applicant: Mark T. Dinsmore ,  David J. Caruso

Inventor： Mark T. Dinsmore ,  David J. Caruso

IPC: H01J35/02

CPC classification number: H01J35/065 ,  H01J35/18 ,  H01J2235/087

Abstract: An x-ray source includes an insulating tube having a cylindrical inside surface defining a cylindrical vacuum cavity, a cathode located near a first end of the insulating tube and adapted to be optically heated for emitting electrons, an anode adapted for a voltage bias with respect to the cathode for accelerating electrons emitted from the cathode, an x-ray emitter target located near a second end of the insulating tube for impact by accelerated electrons, and a secondary emission reduction layer covering at least a portion of the inside surface and adapted to minimize charge build-up on the inside surface, wherein the insulating tube is adapted to be weakly conductive to support a uniform voltage gradient along the insulating tube and across the voltage bias between the cathode and the anode.

Abstract translation: x射线源包括绝缘管，其具有限定圆柱形真空腔的圆柱形内表面，阴极，位于绝缘管的第一端附近，并且适于被光学加热以发射电子，阳极适于相对于电压偏置 到用于加速从阴极发射的电子的阴极，位于绝缘管的第二端附近用于受加速电子冲击的x射线发射极靶，以及覆盖内表面的至少一部分的二次发射减少层， 最小化内表面上的电荷积聚，其中绝缘管适于弱导电以支持沿着绝缘管的均匀电压梯度并且跨过阴极和阳极之间的电压偏压。

公开(公告)号：US07187755B2

公开(公告)日：2007-03-06

申请号：US10904280

申请日：2004-11-02

Applicant: Bruce Matthew Dunham ,  John Scott Price ,  Colin R. Wilson

Inventor： Bruce Matthew Dunham ,  John Scott Price ,  Colin R. Wilson

IPC: H01J35/00

CPC classification number: H01J35/065 ,  A61B6/032 ,  A61B6/4028 ,  H01J2235/064

Abstract: An electron emitter assembly and a method for generating an electron beam are provided. The electron emitter assembly includes a laser configured to emit a first light beam and a second light beam. The electron emitter assembly further includes a mirror configured to move to a first operational position to reflect the first light beam toward a first region of a photo-cathode. The mirror is further configured to move to a second operational position to reflect the second light beam toward a second region of the photo-cathode. The photo-cathode is configured to emit a first electron beam when the first light beam contacts the first region and to emit a second electron beam when the second light beam contacts the second region. The electron emitter assembly further includes an anode configured to receive the first and second electron beams from the photo-cathode.

Abstract translation: 提供了一种电子发射器组件和一种用于产生电子束的方法。 电子发射器组件包括被配置为发射第一光束和第二光束的激光器。 电子发射器组件还包括被配置为移动到第一操作位置以将第一光束朝向光阴极的第一区域反射的反射镜。 反射镜还被配置成移动到第二操作位置以将第二光束反射到光 - 阴极的第二区域。 当第二光束接触第二区域时，光阴极被配置为当第一光束接触第一区域时发射第一电子束并发射第二电子束。 电子发射器组件还包括被配置为从光阴极接收第一和第二电子束的阳极。

公开(公告)号：US20070046166A1

公开(公告)日：2007-03-01

申请号：US11590865

申请日：2006-11-01

Applicant: Tomoyuki Okada ,  Tatsuya Matsumura ,  Tooru Yamamoto

Inventor： Tomoyuki Okada ,  Tatsuya Matsumura ,  Tooru Yamamoto

IPC: H01J1/02

CPC classification number: H01J35/065 ,  H01J1/30 ,  H01J3/027 ,  H01J35/116

Abstract: There is disclosed a cold cathode electron source includes: a first conductive member, having an end face and an electron emission layer that is formed on the end face and made of an electron emitting material; and a second conductive member, having a hollow portion that enables insertion of the first conductive member in a first direction substantially perpendicular to the end face, and an opening portion that passes through toward the hollow portion; and wherein the first conductive member is fitted into the second conductive member, is positioned in the first direction with respect to the second conductive member by abutting the second conductive member in the first direction, the first conductive member exposing a surface of the electron emission layer from the opening portion.

Abstract translation: 公开了一种冷阴极电子源，包括：第一导电构件，其具有形成在端面上并由电子发射材料制成的端面和电子发射层; 以及第二导电构件，具有能够使第一导电构件在与端面大致正交的第一方向上插入的中空部以及朝向中空部穿过的开口部; 并且其中所述第一导电构件配合到所述第二导电构件中，通过在所述第一方向上抵靠所述第二导电构件而相对于所述第二导电构件位于所述第一方向，所述第一导电构件暴露所述电子发射层的表面 从开口部分。

公开(公告)号：US07085350B2

公开(公告)日：2006-08-01

申请号：US10904284

申请日：2004-11-02

Applicant: Bruce Matthew Dunham ,  John Scott Price ,  Colin R. Wilson

Inventor： Bruce Matthew Dunham ,  John Scott Price ,  Colin R. Wilson

IPC: H01J35/00

CPC classification number: H01J35/065 ,  H01J35/24 ,  H01J2235/062 ,  H01J2235/068 ,  H01J2235/087

Abstract: An electron emitter assembly and a method for adjusting a power level of an electron beam are provided. The electron emitter assembly includes a laser configured to emit a first light beam. The electron emitter assembly further includes a light-attenuating device configured to receive the first light beam and to attenuate the first light beam between a first light intensity and a second light intensity greater than the first light intensity. The electron emitter assembly further includes a photo-cathode configured to receive the first light beam from the light-attenuating device. The photo-cathode is further configured to emit a first electron beam having a first power level in response to receiving the first light beam having the first light intensity. The photo-cathode is further configured to emit a second electron beam having a second power level greater than the first power level in response to receiving the first light beam having the second light intensity. The electron emitter assembly further includes an anode configured to receive the first and second electrons beams from the photo-cathode.

Abstract translation: 提供了一种用于调节电子束功率电平的电子发射器组件和方法。 电子发射器组件包括被配置为发射第一光束的激光器。 电子发射器组件还包括被配置为接收第一光束并且在第一光强度和大于第一光强度的第二光强度之间衰减第一光束的光衰减器件。 电子发射器组件还包括被配置为从光衰减装置接收第一光束的光阴极。 光阴极还被配置为响应于接收到具有第一光强度的第一光束而发射具有第一功率电平的第一电子束。 响应于接收到具有第二光强度的第一光束，光阴极还被配置为发射具有大于第一功率电平的第二功率电平的第二电子束。 电子发射器组件还包括被配置为从光阴极接收第一和第二电子束的阳极。

公开(公告)号：US20060018432A1

公开(公告)日：2006-01-26

申请号：US10970384

申请日：2004-10-22

Applicant: Otto Zhou ,  Jianping Lu ,  Qi Qiu

Inventor： Otto Zhou ,  Jianping Lu ,  Qi Qiu

IPC: H01J35/22 ,  H01J35/00 ,  H01J35/32

CPC classification number: H01J35/14 ,  A61B6/032 ,  A61B6/4028 ,  B82Y10/00 ,  H01J35/065 ,  H01J35/22 ,  H01J2201/30469 ,  H01J2235/064 ,  H01J2235/068 ,  H05G1/34

Abstract: A structure to generate x-rays has a plurality of stationary and individually electrically addressable field emissive electron sources with a substrate composed of a field emissive material, such as carbon nanotubes. Electrically switching the field emissive electron sources at a predetermined frequency field emits electrons in a programmable sequence toward an incidence point on a target. The generated x-rays correspond in frequency and in position to that of the field emissive electron source. The large-area target and array or matrix of emitters can image objects from different positions and/or angles without moving the object or the structure and can produce a three dimensional image. The x-ray system is suitable for a variety of applications including industrial inspection/quality control, analytical instrumentation, security systems such as airport security inspection systems, and medical imaging, such as computed tomography.

公开(公告)号：US20060008047A1

公开(公告)日：2006-01-12

申请号：US10923385

申请日：2004-08-20

Applicant: Otto Zhou ,  Jianping Lu ,  Yueh Lee ,  Weili Lin ,  Yuan Cheng ,  Jian Zhang

Inventor： Otto Zhou ,  Jianping Lu ,  Yueh Lee ,  Weili Lin ,  Yuan Cheng ,  Jian Zhang

IPC: A61B6/00

CPC classification number: B82Y10/00 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/508 ,  A61B6/541 ,  G01N23/046 ,  G01N2223/316 ,  G01N2223/419 ,  G01N2223/612 ,  H01J35/065 ,  H01J2201/30469 ,  H01J2235/068

Abstract: Computed tomography device comprising an x-ray source and an x-ray detecting unit. The x-ray source comprises a cathode with a plurality of individually programmable electron emitting units that each emit an electron upon an application of an electric field, an anode target that emits an x-ray upon impact by the emitted electron, and a collimator. Each electron emitting unit includes an electron field emitting material. The electron field emitting material includes a nanostructured material or a plurality of nanotubes or a plurality of nanowires. Computed tomography methods are also provided.

Abstract translation: 计算机断层摄影装置，包括x射线源和x射线检测单元。 x射线源包括具有多个单独可编程的电子发射单元的阴极，每个单独可编程的电子发射单元在施加电场时发射电子，在被发射的电子撞击时发射x射线的阳极靶和准直器。 每个电子发射单元包括电子场发射材料。 电子场发射材料包括纳米结构材料或多个纳米管或多个纳米线。 还提供了计算机断层扫描方法。

公开(公告)号：US20050213709A1

公开(公告)日：2005-09-29

申请号：US11087271

申请日：2005-03-23

Applicant: Mark Dinsmore ,  David Caruso

Inventor： Mark Dinsmore ,  David Caruso

IPC: G09G1/04 ,  G21G4/00 ,  H01J29/58 ,  H01J35/00 ,  H01J35/06 ,  H01J35/18 ,  H05H1/00

CPC classification number: H01J35/065 ,  H01J35/18 ,  H01J2235/087

Abstract: An x-ray source includes an insulating tube having a cylindrical inside surface defining a cylindrical vacuum cavity, a cathode located near a first end of the insulating tube and adapted to be optically heated for emitting electrons, an anode adapted for a voltage bias with respect to the cathode for accelerating electrons emitted from the cathode, an x-ray emitter target located near a second end of the insulating tube for impact by accelerated electrons, and a secondary emission reduction layer covering at least a portion of the inside surface and adapted to minimize charge build-up on the inside surface, wherein the insulating tube is adapted to be weakly conductive to support a uniform voltage gradient along the insulating tube and across the voltage bias between the cathode and the anode.

Abstract translation: x射线源包括绝缘管，其具有限定圆柱形真空腔的圆柱形内表面，阴极，位于绝缘管的第一端附近，并且适于被光学加热以发射电子，阳极适于相对于电压偏置 到用于加速从阴极发射的电子的阴极，位于绝缘管的第二端附近用于受加速电子冲击的x射线发射极靶，以及覆盖内表面的至少一部分的二次发射减少层， 最小化内表面上的电荷积聚，其中绝缘管适于弱导电以支持沿着绝缘管的均匀电压梯度并且跨过阴极和阳极之间的电压偏压。