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    • 2. 发明申请
    • SYSTEMS AND METHODS FOR TEMPORAL MULTIPLEXING X-RAY IMAGING
    • 用于时间多重X射线成像的系统和方法
    • US20120057678A1
    • 2012-03-08
    • US12875260
    • 2010-09-03
    • Jianping LuOtto ZhouGuohua CaoJian Zhang
    • Jianping LuOtto ZhouGuohua CaoJian Zhang
    • H05G1/10
    • H05G1/62H04N5/32
    • The present subject matter relates to systems and methods for temporal multiplexing x-ray imaging of dynamic objects with high temporal resolution and fast imaging speed. A pulsed x-ray beam can irradiate an object undergoing a range of motion such as a cyclic motion. Multiple x-ray images can be acquired at different phases within a single motion cycle or range of the object. The multiple x-ray images can be demultiplexed to produce an individual phase image. Compared to sequential imaging, temporal multiplexing x-ray imaging can achieve high temporal resolution of dynamics object in multiple phases with imaging time comparable to that of a single phase. Temporal multiplexing x-ray imaging can thus be applied to a wide variety of applications, including biomedical imaging and industrial non-destructive testing.
    • 本主题涉及用于时间复用具有高时间分辨率和快速成像速度的动态对象的x射线成像的系统和方法。 脉冲X射线束可以照射经历诸如循环运动的运动范围的物体。 可以在单个运动周期或对象范围内的不同阶段获取多个X射线图像。 可以将多个X射线图像解复用以产生单个相位图像。 与顺序成像相比,时间复用x射线成像可以在多个阶段实现动态对象的高时间分辨率,成像时间与单相相当。 因此,时间复用x射线成像可以应用于各种应用,包括生物医学成像和工业无损检测。
    • 4. 发明申请
    • Micro-focus field emission x-ray sources and related methods
    • 微焦场发射X射线源及相关方法
    • US20080043920A1
    • 2008-02-21
    • US11717590
    • 2007-03-13
    • Zejian LiuOtto ZhouJianping Lu
    • Zejian LiuOtto ZhouJianping Lu
    • H01J35/14
    • H01J35/065H01J35/14H01J2235/062
    • Micro-focus field emission x-ray sources and related methods are provided. A micro-focus field emission x-ray source can include a field emission cathode including a film with a layer of electron field emitting materials patterned on a conducting surface. Further, the x-ray source can include a gate electrode for extracting field emitted electrons from the cathode when a bias electrical field is applied between the gate electrode and the cathode. The x-ray source can also include an anode. Further, the x-ray source can include an electrostatic focusing unit between the gate electrode and anode. The electrostatic focusing unit can include multiple focusing electrodes that are electrically separated from each other. Each of the electrodes can have an independently adjustable electrical potential. A controller can be configured to adjust at least one of the electrical potentials of the focusing electrodes and to adjust a size of the cathode.
    • 提供微焦场发射x射线源及相关方法。 微焦点场发射x射线源可以包括场致发射阴极,其包括具有在导电表面上图案化的电子场发射材料层的膜。 此外,当在栅电极和阴极之间施加偏置电场时,x射线源可以包括用于从阴极提取场发射的电子的栅电极。 x射线源还可以包括阳极。 此外,x射线源可以包括在栅电极和阳极之间的静电聚焦单元。 静电聚焦单元可以包括彼此电分离的多个聚焦电极。 每个电极可以具有独立可调的电位。 控制器可以被配置为调节聚焦电极的至少一个电位并调整阴极的尺寸。
    • 5. 发明授权
    • Field emission ion source based on nanostructure-containing material
    • 基于纳米结构材料的场发射离子源
    • US07129513B2
    • 2006-10-31
    • US10858436
    • 2004-06-02
    • Otto Z. ZhouJianping LuChangkun DongBo Gao
    • Otto Z. ZhouJianping LuChangkun DongBo Gao
    • H01L29/06
    • H01J27/26B82Y10/00
    • A field emission ion source has nanostructure materials on at least an emitting edge of the anode electrode. Metal is transferred from a metal reservoir to the emitting edge of the anode, where the metal is transferred to an emitting end of the nanostructure materials and is ionized under an applied electric field. Plural ion sources can be combined to form a field emission ion source device. The numbers of emitting sources are selectable through electric or mechanical switches and different ion extraction potentials can be applied. Various nanostructure materials include: single wall carbon nanotubes and bundles, few-walled carbon nanotubes and bundles, multi-walled carbon nanotubes and bundles, and carbon fiber. Nanostructure-containing material is integrated into the anode by electrophoresis, dielectrophoresis, CVD, screen printing, and mechanical methods. Metal, preferably alkali metal, is transferred into the nanostructure-containing material by one or a combination of following intercalation methods: vapor transport, solution, electrochemical, and solid state reaction.
    • 场发射离子源在阳极电极的至少一个发射边缘上具有纳米结构材料。 金属从金属储存器转移到阳极的发射边缘,其中金属被转移到纳米结构材料的发射端,并在施加的电场下被电离。 多个离子源可以组合形成场发射离子源装置。 发射源的数量可以通过电动或机械开关进行选择,并且可以应用不同的离子提取电位。 各种纳米结构材料包括:单壁碳纳米管和束,几壁碳纳米管和束,多壁碳纳米管和束以及碳纤维。 含纳米结构的材料通过电泳,介电电泳,CVD,丝网印刷和机械方法集成到阳极中。 通过以下插入方法之一或组合将金属(优选碱金属)转移到含纳米结构的材料中:蒸气转移,溶液,电化学和固态反应。