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    Direct conversion X-ray detector with over-range and pile-up correction
    3.
    发明申请
    Direct conversion X-ray detector with over-range and pile-up correction 失效
    具有超范围和堆积校正的直接转换X射线检测器

    公开(公告)号：US20070076848A1

    公开(公告)日：2007-04-05

    申请号：US11239962

    申请日：2005-09-30

    申请人： Deborah Walter ,  John Tkaczyk ,  Yanfeng Du

    发明人： Deborah Walter ,  John Tkaczyk ,  Yanfeng Du

    IPC分类号： H05G1/64

    CPC分类号： A61B6/032 ,  A61B6/4241 ,  A61B6/585 ,  G01T1/171

    摘要： A method of scanning a subject to be imaged is presented. The method includes acquiring projection data from a first region of a pixel, where the first region has a first area. Additionally, the method includes acquiring projection data from a second region of the pixel, where the second region has a second area. The method also includes combining projection data from the first and second regions to obtain composite projection data for the pixel. Computer-readable medium and systems that afford functionality of the type defined by this method are also contemplated in conjunction with the present technique.

    摘要翻译： 呈现扫描被摄体的方法。 该方法包括从像素的第一区域获取投影数据，其中第一区域具有第一区域。 另外，该方法包括从像素的第二区域获取投影数据，其中第二区域具有第二区域。 该方法还包括组合来自第一和第二区域的投影数据以获得像素的复合投影数据。 计算机可读介质和提供由该方法定义的类型的功能的系统也结合本技术考虑。

    System and method for acquisition and reconstruction of contrast-enhanced, artifact-reduced CT images
    5.
    发明授权
    System and method for acquisition and reconstruction of contrast-enhanced, artifact-reduced CT images 有权
    对比度增强，神经减影CT图像的采集和重建的系统和方法

    公开(公告)号：US07583779B2

    公开(公告)日：2009-09-01

    申请号：US10904716

    申请日：2004-11-24

    申请人： J. Eric Tkaczyk ,  Deborah Walter ,  Yanfeng Du

    发明人： J. Eric Tkaczyk ,  Deborah Walter ,  Yanfeng Du

    IPC分类号： A61B6/00

    CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/5258 ,  A61B6/542 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/006

    摘要： A system and method are disclosed for reconstructing contrast-enhanced CT images that are substantially free of beam-hardening artifacts. An imaging system includes a radiation source configured to project radiation toward an object to be scanned and an energy discriminating detector assembly having a plurality of detector elements and configured to detect radiation emitted by the radiation source and attenuated by the object to be scanned. The imaging system also includes computer programmed to count a number of photons detected by each detector element and associate an energy value to each counted photon and determine a material composition of a CT view from the number of photons counted and the energy value associated with each counted photon. The computer is also programmed to apply a weighting to the CT view based on the material composition of the CT view and reconstruct an image with differential weighting based on the weighting of the CT view.

    摘要翻译： 公开了一种系统和方法，用于重建基本上没有束固化假象的对比度增强的CT图像。 成像系统包括被配置为向待扫描的物体投射辐射的辐射源，以及具有多个检测器元件并被配置为检测由辐射源发射并被被扫描物体衰减的辐射的能量鉴别检测器组件。 成像系统还包括被编程为对每个检测器元件检测到的数量的光子进行计数的计算机，并将能量值与每个计数光子相关联并且根据所计数的光子数量和与每个计数相关联的能量值确定CT视图的材料组成 光子。 计算机还被编程为基于CT视图的材料组成对CT视图应用加权，并且基于CT视图的加权重建具有差分加权的图像。

    X-RAY FILTER HAVING DYNAMICALLY DISPLACEABLE X-RAY ATTENUATING FLUID
    6.
    发明申请
    X-RAY FILTER HAVING DYNAMICALLY DISPLACEABLE X-RAY ATTENUATING FLUID 失效
    具有动态位移X射线衰减流体的X射线滤镜

    公开(公告)号：US20070092066A1

    公开(公告)日：2007-04-26

    申请号：US11163496

    申请日：2005-10-20

    申请人： J. Tkaczyk ,  Deborah Walter ,  Xiaoye Wu ,  Brian Bales ,  James Leblanc ,  Yanfeng Du

    发明人： J. Tkaczyk ,  Deborah Walter ,  Xiaoye Wu ,  Brian Bales ,  James Leblanc ,  Yanfeng Du

    IPC分类号： G21K3/00

    CPC分类号： G21K1/10

    摘要： A bowtie filter is constructed to have a fluidic envelope filled with attenuating fluid and a displacement insert that can present various x-ray attenuation profiles during a scan. The insert is designed to displace the attenuating fluid to achieve a denied attenuating or filtering profile. The insert can be rotated, twisted, moved, and otherwise contorted within the fluidic envelope as needed during the course of a scan. As the angle, position and shape of the zombie is changed, the x-ray profile of the filter changes. The insert may have a default shape when at rest, but can have its shape changed when external forces are placed thereon. As x-ray filtering needs change during the course of the scan, the insert can be compressed, stretched, and/or contorted to achieve additional filtering profiles.

    摘要翻译： 弓形过滤器被构造成具有填充有衰减流体的流体信封和可在扫描期间呈现各种x射线衰减分布的位移插入件。 插入件被设计成使衰减流体移位以实现被拒绝的衰减或过滤轮廓。 在扫描过程中，插入物可以根据需要旋转，扭转，移动，并且在流体封套内扭曲。 随着僵尸的角度，位置和形状的改变，过滤器的X射线轮廓也会改变。 当静止时，插入件可以具有默认形状，但是当外力在其上放置时，其形状可以改变。 由于X射线过滤在扫描过程中需要更改，所以插入物可以被压缩，拉伸和/或扭转以实现额外的过滤轮廓。

    SYSTEM AND METHOD FOR ACQUISITION AND RECONSTRUCTION OF CONTRAST-ENHANCED, ARTIFACT-REDUCED CT IMAGES
    7.
    发明申请
    SYSTEM AND METHOD FOR ACQUISITION AND RECONSTRUCTION OF CONTRAST-ENHANCED, ARTIFACT-REDUCED CT IMAGES 有权
    对比增强，减少CT图像的获取和重建的系统和方法

    公开(公告)号：US20060109949A1

    公开(公告)日：2006-05-25

    申请号：US10904716

    申请日：2004-11-24

    申请人： J. Tkaczyk ,  Deborah Walter ,  Yanfeng Du

    发明人： J. Tkaczyk ,  Deborah Walter ,  Yanfeng Du

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

    CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/5258 ,  A61B6/542 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/006

    摘要： A system and method are disclosed for reconstructing contrast-enhanced CT images that are substantially free of beam-hardening artifacts. An imaging system includes a radiation source configured to project radiation toward an object to be scanned and an energy discriminating detector assembly having a plurality of detector elements and configured to detect radiation emitted by the radiation source and attenuated by the object to be scanned. The imaging system also includes computer programmed to count a number of photons detected by each detector element and associate an energy value to each counted photon and determine a material composition of a CT view from the number of photons counted and the energy value associated with each counted photon. The computer is also programmed to apply a weighting to the CT view based on the material composition of the CT view and reconstruct an image with differential weighting based on the weighting of the CT view.

    摘要翻译： 公开了一种系统和方法，用于重建基本上没有束固化假象的对比度增强的CT图像。 成像系统包括被配置为向待扫描的物体投射辐射的辐射源，以及具有多个检测器元件并被配置为检测由辐射源发射并被被扫描物体衰减的辐射的能量鉴别检测器组件。 成像系统还包括被编程为对每个检测器元件检测到的数量的光子进行计数的计算机，并将能量值与每个计数光子相关联并且根据所计数的光子数量和与每个计数相关联的能量值确定CT视图的材料组成 光子。 计算机还被编程为基于CT视图的材料组成对CT视图应用加权，并且基于CT视图的加权重建具有差分加权的图像。