利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

18 条记录 (耗时 0.029 秒)

    X-ray system and method for sampling image data
    13.
    发明授权
    X-ray system and method for sampling image data 有权
    X射线系统和图像数据采样方法

    公开(公告)号：US08576986B2

    公开(公告)日：2013-11-05

    申请号：US13011033

    申请日：2011-01-21

    申请人： James Zhengshe Liu ,  Paul Richard Granfors ,  Kenneth Scott Kump ,  Ping Xue ,  Donald Fayette Langler ,  Brian John Kost

    发明人： James Zhengshe Liu ,  Paul Richard Granfors ,  Kenneth Scott Kump ,  Ping Xue ,  Donald Fayette Langler ,  Brian John Kost

    IPC分类号： H05G1/64 ,  H05G1/46 ,  G01T1/20

    CPC分类号： G01T1/247 ,  A61B6/4494 ,  G01T1/24

    摘要： An X-ray imaging method includes in a digital X-ray detector including an array of discrete picture elements each including a photodiode and a transistor, applying a first voltage to the transistors of the discrete picture elements. The method also includes preparing for acquisition of X-ray image data by sampling data from the discrete picture elements while applying a second voltage to the transistors of the discrete picture elements not then being sampled, the second voltage being more negative than the first voltage. The method further includes receiving X-ray radiation on the detector from a source. The method yet further includes sampling X-ray image data from the discrete picture elements while applying the second voltage to the transistors of the discrete picture elements not then being sampled.

    摘要翻译： 一种X射线成像方法包括：数字X射线检测器，包括各自包括光电二极管和晶体管的离散像素阵列，向离散像素的晶体管施加第一电压。 该方法还包括准备通过从离散像素采样数据来获取X射线图像数据，同时向未被采样的离散像素的晶体管施加第二电压，第二电压比第一电压更负。 该方法还包括从源接收检测器上的X射线辐射。 该方法还包括从离散像素采样X射线图像数据，同时将第二电压施加到未被采样的离散像素的晶体管。

    X-RAY SYSTEM AND METHOD FOR SAMPLING IMAGE DATA
    14.
    发明申请
    X-RAY SYSTEM AND METHOD FOR SAMPLING IMAGE DATA 有权
    X射线系统和采样图像数据的方法

    公开(公告)号：US20120189100A1

    公开(公告)日：2012-07-26

    申请号：US13011033

    申请日：2011-01-21

    申请人： James Zhengshe Liu ,  Paul Richard Granfors ,  Kenneth Scott Kump ,  Ping Xue ,  Donald Fayette Langler ,  Brian John Kost

    发明人： James Zhengshe Liu ,  Paul Richard Granfors ,  Kenneth Scott Kump ,  Ping Xue ,  Donald Fayette Langler ,  Brian John Kost

    IPC分类号： G01N23/04

    CPC分类号： G01T1/247 ,  A61B6/4494 ,  G01T1/24

    摘要： An X-ray imaging method includes in a digital X-ray detector including an array of discrete picture elements each including a photodiode and a transistor, applying a first voltage to the transistors of the discrete picture elements. The method also includes preparing for acquisition of X-ray image data by sampling data from the discrete picture elements while applying a second voltage to the transistors of the discrete picture elements not then being sampled, the second voltage being more negative than the first voltage. The method further includes receiving X-ray radiation on the detector from a source. The method yet further includes sampling X-ray image data from the discrete picture elements while applying the second voltage to the transistors of the discrete picture elements not then being sampled.

    摘要翻译： 一种X射线成像方法包括：数字X射线检测器，包括各自包括光电二极管和晶体管的离散像素阵列，向离散像素的晶体管施加第一电压。 该方法还包括准备通过从离散像素采样数据来获取X射线图像数据，同时向未被采样的离散像素的晶体管施加第二电压，第二电压比第一电压更负。 该方法还包括从源接收检测器上的X射线辐射。 该方法还包括从离散像素采样X射线图像数据，同时将第二电压施加到未被采样的离散像素的晶体管。

    System and method for compensation of scintillator hysteresis in x-ray detectors
    16.
    发明授权
    System and method for compensation of scintillator hysteresis in x-ray detectors 失效
    用于补偿X射线探测器中闪烁体滞后的系统和方法

    公开(公告)号：US07558412B2

    公开(公告)日：2009-07-07

    申请号：US10774174

    申请日：2004-02-06

    申请人： Paul Richard Granfors ,  Manat Maolinbay ,  Richard Aufrichtig

    发明人： Paul Richard Granfors ,  Manat Maolinbay ,  Richard Aufrichtig

    IPC分类号： G06K9/00

    CPC分类号： H04N5/32 ,  A61B6/505 ,  A61B6/585 ,  H04N5/3205 ,  H04N5/3597

    摘要： A method and system for detecting the potential of an x-ray imaging system to create images with scintillator hysteresis artifacts includes examining an x-ray image to measure two signal levels for two areas of interest, then determining a difference between the two signal levels and comparing the difference to a threshold. The signal levels can be measured by determining an amount of electrical charge discharged in photodiodes of the detector. If the difference in signals is greater than the threshold amount, then the possibility exists that scintillator hysteresis artifacts may be produced in images. In addition, the present invention also provides for the elimination or reduction in magnitude of scintillator hysteresis artifacts in images produced by an x-ray imaging system. After the possibility of scintillator hysteresis artifacts is detected, the detector can be irradiated with an x-ray flux to eliminate or reduce the magnitude of the artifacts in images produced by the x-ray imaging system.

    摘要翻译： 用于检测X射线成像系统以产生具有闪烁体滞后伪影的图像的电位的方法和系统包括检查x射线图像以测量两个感兴趣的区域的两个信号电平，然后确定两个信号电平之间的差异， 将差异与阈值进行比较。 可以通过确定在检测器的光电二极管中放电的电荷量来测量信号电平。 如果信号差异大于阈值，则存在可能在图像中产生闪烁体迟滞伪影的可能性。 此外，本发明还提供消除或减少由X射线成像系统产生的图像中的闪烁体滞后伪影的大小。 在检测到闪烁体滞后伪影的可能性之后，可以用x射线通量照射检测器，以消除或减少由x射线成像系统产生的图像中的伪影的大小。

    Digital x-ray imager alignment method
    17.
    发明授权
    Digital x-ray imager alignment method 有权
    数字X射线成像仪对准方法

    公开(公告)号：US06422750B1

    公开(公告)日：2002-07-23

    申请号：US09745678

    申请日：2000-12-22

    申请人： Robert Forrest Kwasnick ,  Paul Richard Granfors

    发明人： Robert Forrest Kwasnick ,  Paul Richard Granfors

    IPC分类号： G03C516

    CPC分类号： G06T3/00 ,  A61B6/06 ,  A61B6/4291 ,  A61B6/488 ,  A61B6/587

    摘要： In a digital x-ray imager alignment method, a low exposure x-ray image of an object is taken. The dose is sufficient to create an image of an object and alignment bars on an antiscatter grid. The relative position of the alignment bars on the image is measured. The relative angle of the detector to the x-ray source is adjusted. This adjustment brings the grid into alignment with the x-ray source. A diagnostic x-ray exposure image of the object is then taken.

    摘要翻译： 在数字X射线成像仪对准方法中，拍摄对象的低曝光x射线图像。 该剂量足以在反散射网格上产生物体和对准条的图像。 测量对准条在图像上的相对位置。 检测器与X射线源的相对角度被调整。 这种调整使网格与x射线源对齐。 然后拍摄对象的诊断X射线曝光图像。

    X-ray detector and method for tissue specific image
    18.
    发明授权
    X-ray detector and method for tissue specific image 失效
    X射线检测器和组织特异图像的方法

    公开(公告)号：US06408050B1

    公开(公告)日：2002-06-18

    申请号：US09661776

    申请日：2000-09-14

    申请人： Sung Su Han ,  Paul Richard Granfors

    发明人： Sung Su Han ,  Paul Richard Granfors

    IPC分类号： H05G164

    CPC分类号： G01T1/17 ,  A61B6/583 ,  G01T1/2928

    摘要： A method for energy dependent imaging of a region of interest includes the step of exposing an X-ray detector to X-ray photons during an examination period, and separating the X-ray photons into two groups, those with energies above a selected energy threshold, and those with energies below a selected energy threshold. The X-ray photons with energy above the threshold are counted to provide a first energy photon count, while the X-ray photons with energy below the threshold are counted to provide a second energy photon count. The method stores the first energy photon count and the second energy photon count in a memory as examination data, and produces an image by applying an image processing technique to the examination data.

    摘要翻译： 用于感兴趣区域的能量相关成像的方法包括在检查期间将X射线检测器暴露于X射线光子的步骤，以及将X射线光子分成两组，其中能量高于所选能量阈值 ，以及能量低于所选能量阈值的那些。 计数具有高于阈值的能量的X射线光子以提供第一能量光子计数，而将能量低于阈值的X射线光子计数以提供第二能量光子计数。 该方法将第一能量光子计数和第二能量光子计数存储在存储器中作为检查数据，并通过对检查数据应用图像处理技术来产生图像。