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11 条记录 (耗时 0.026 秒)

    Methods and apparatus for truncation compensation
    1.
    发明授权
    Methods and apparatus for truncation compensation 失效
    截肢补偿的方法和装置

    公开(公告)号：US07254259B2

    公开(公告)日：2007-08-07

    申请号：US10615411

    申请日：2003-07-03

    申请人： Jiang Hsieh ,  Brian Grekowicz ,  Edward Henry Chao ,  Scott Matt McOlash ,  Amy Lynn Horst

    发明人： Jiang Hsieh ,  Brian Grekowicz ,  Edward Henry Chao ,  Scott Matt McOlash ,  Amy Lynn Horst

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/583

    摘要： A method includes calculating a sum of all samples at each projection view of a scan of an object, determining a maximum value of the calculated sums, averaging a plurality of samples m at a projection view index k when the sum of all samples at index k is less than a predetermined percentage of the maximum value, comparing the average to a threshold t, determining the projection truncated when the average is greater than t, and determining the projection not truncated when the average is not greater than t.

    摘要翻译： 一种方法包括：计算对象扫描的每个投影视图处的所有样本的总和，确定所计算出的和的最大值，在索引k处的所有样本的和之间以投影视图索引k平均多个样本m 小于最大值的预定百分比，将平均值与阈值t进行比较，确定当平均值大于t时截断的投影，以及当平均值不大于t时确定投影未被截断。

    Methods and apparatus for calibrating CT x-ray beam tracking loop
    4.
    发明授权
    Methods and apparatus for calibrating CT x-ray beam tracking loop 失效
    用于校准CT X射线束跟踪循环的方法和装置

    公开(公告)号：US07257187B2

    公开(公告)日：2007-08-14

    申请号：US11124331

    申请日：2005-05-06

    申请人： Edward Henry Chao ,  Thomas Louis Toth ,  Maryam Shaukat Hameed

    发明人： Edward Henry Chao ,  Thomas Louis Toth ,  Maryam Shaukat Hameed

    IPC分类号： H05G1/30

    CPC分类号： A61B6/585 ,  A61B6/4275

    摘要： A method for determining tracking control parameters for positioning an x-ray beam of a computed tomography imaging system, the imaging system including a movable collimator positionable in steps and a detector array including a plurality of detector elements arranged in rows and channels, the rows extending from a detector A-side to a detector B-side. The method includes determining a detector A-side and a detector B-side target beam penumbra position, computing a plurality of Z-ratio curves corresponding to different detector rows and detector channels, and comparing the Z-ratio curves at the detector A-side and detector B-side target beam positions to determine the optimal Z-ratio curve and corresponding detector channels and rows for controlling the X-ray beam positioning.

    摘要翻译： 一种用于确定用于定位计算机断层摄影成像系统的x射线束的跟踪控制参数的方法，所述成像系统包括可定位成可移动的准直器和包括排列成行和通道的多个检测器元件的检测器阵列，所述行延伸 从检测器A侧到检测器B侧。 该方法包括确定检测器A侧和检测器B侧目标束半影位置，计算对应于不同检测器行和检测器通道的多个Z比曲线，以及比较检测器A侧的Z比曲线 和检测器B侧目标光束位置，以确定最佳Z比率曲线以及用于控制X射线束定位的相应检测器通道和行。

    Method and apparatus for measuring effective focal spot parameters of an X-ray source
    5.
    发明授权
    Method and apparatus for measuring effective focal spot parameters of an X-ray source 有权
    用于测量X射线源的有效焦点参数的方法和装置

    公开(公告)号：US07249886B1

    公开(公告)日：2007-07-31

    申请号：US11443239

    申请日：2006-05-30

    申请人： Edward Henry Chao ,  Bruce Matthew Dunham

    发明人： Edward Henry Chao ,  Bruce Matthew Dunham

    IPC分类号： G01D18/00

    CPC分类号： A61B6/06 ,  A61B6/037

    摘要： A method for measuring focal spot shape of a radiation beam from a radiation source includes collimating the radiation beam using a collimator having a well-defined edge, measuring an intensity profile of the collimated radiation beam, determining a function of the measured intensity profile, and determining a metric of the of the focal spot using the determined function of the measured intensity profile.

    摘要翻译： 用于测量来自辐射源的辐射束的焦点形状的方法包括使用具有明确界定的边缘的准直仪准直辐射束，测量准直辐射束的强度分布，确定测量的强度分布的函数，以及 使用确定的测量的强度分布函数来确定焦点的度量。

    Multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography profiles
    6.
    发明授权
    Multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography profiles 失效
    用于获得最佳切片敏感计算机断层摄影概况的多扇区退避逻辑算法

    公开(公告)号：US06873675B2

    公开(公告)日：2005-03-29

    申请号：US10323256

    申请日：2002-12-18

    申请人： Rajendra Kurady ,  Darin Okerlund ,  Mark Woodford ,  Edward Henry Chao

    发明人： Rajendra Kurady ,  Darin Okerlund ,  Mark Woodford ,  Edward Henry Chao

    IPC分类号： A61B6/00 ,  G06T11/00 ,  G21K1/12 ,  G01N23/00

    CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/503 ,  A61B6/541 ,  A61B8/5284 ,  G06T2211/412 ,  Y10S378/901

    摘要： A multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography (“CT”) profiles. The systems and methods of the present invention improving the temporal resolution of a CT system by checking for Z location errors between sectors and automatically backing-off to an alternative multi-sector algorithm when necessary (i.e., selecting an optimized maximum number of sectors to reconstruct), providing less Z location error. Based upon this Z location error, the systems and methods of the present invention also calculating the maximum number of sectors that should be used for reconstruction “on-the-fly” (i.e., on a per image basis across an entire series of images). These systems and methods utilizing the Recommended Protocol for Cardiac Reconstruction Algorithms.

    摘要翻译： 用于获得最佳切片敏感计算机断层扫描（“CT”）轮廓的多扇区退避逻辑算法。 本发明的系统和方法通过检查扇区之间的Z位置误差来提高CT系统的时间分辨率，并且在必要时自动地退回到替代的多扇区算法（即，选择优化的最大数量的扇区以重建 ），提供较少的Z位置错误。 基于该Z位置错误，本发明的系统和方法还计算应该用于“即时”重建的扇区的最大数量（即，跨整个图像的每个图像） 。 这些系统和方法利用推荐的心脏重建算法协议。

    Method and system for measuring table sag
    7.
    发明授权
    Method and system for measuring table sag 有权
    测量台下垂的方法和系统

    公开(公告)号：US07111985B2

    公开(公告)日：2006-09-26

    申请号：US10982325

    申请日：2004-11-04

    申请人： Edward Henry Chao ,  Wolfgang Just ,  Ariel Friedlander

    发明人： Edward Henry Chao ,  Wolfgang Just ,  Ariel Friedlander

    IPC分类号： G01D18/00

    CPC分类号： A61B6/5276 ,  A61B6/032 ,  A61B6/0457 ,  A61B6/583

    摘要： A method for measuring table sag of a table may include utilizing images of an unloaded table and a loaded table, plotting pixel values for a range of pixels for each image within a particular column, identifying a pixel within each plot that has a highest pixel value, calculating a difference between the identified pixel row numbers, and converting the difference into a measurement of table sag. A storage medium encoded with machine-readable computer program code for measuring table sag of a table may include instructions for causing a computer to implement the method. A computer for use in an imaging system may utilize digital images for the measurement of table sag and an imaging system may include such a computer.

    摘要翻译： 用于测量表的凹陷的方法可以包括利用未加载的表和加载表的图像，绘制特定列内的每个图像的像素范围的像素值，识别每个图中具有最高像素值的像素 计算所识别的像素行数之间的差，并将该差转换为表下垂的测量。 编码有用于测量表的表下垂的机器可读计算机程序代码的存储介质可以包括用于使计算机实现该方法的指令。 用于成像系统的计算机可以利用数字图像来测量台下垂，并且成像系统可以包括这样的计算机。

    Multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography profiles
    9.
    再颁专利
    Multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography profiles 失效
    用于获得最佳切片敏感计算机断层摄影概况的多扇区退避逻辑算法

    公开(公告)号：USRE41740E1

    公开(公告)日：2010-09-21

    申请号：US11706836

    申请日：2007-02-14

    申请人： Darin Robert Okerlund ,  Mark Edward Woodford ,  Edward Henry Chao ,  Rajendra Kurady

    发明人： Darin Robert Okerlund ,  Mark Edward Woodford ,  Edward Henry Chao ,  Rajendra Kurady

    IPC分类号： A61B6/00

    CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/503 ,  A61B6/541 ,  A61B8/5284 ,  G06T2211/412 ,  Y10S378/901

    摘要： A multi-sector back-off logic algorithm for obtaining optimal slice-sensitive computed tomography (“CT”) profiles. The systems and methods of the present invention improving the temporal resolution of a CT system by checking for Z location errors between sectors and automatically backing-off to an alternative multi-sector algorithm when necessary (i.e., selecting an optimized maximum number of sectors to reconstruct), providing less Z location error. Based upon this Z location error, the systems and methods of the present invention also calculating the maximum number of sectors that should be used for reconstruction “on-the-fly” (i.e., on a per image basis across an entire series of images). These systems and methods utilizing the Recommended Protocol for Cardiac Reconstruction Algorithms.

    摘要翻译： 用于获得最佳切片敏感计算机断层扫描（“CT”）轮廓的多扇区退避逻辑算法。 本发明的系统和方法通过检查扇区之间的Z位置误差来提高CT系统的时间分辨率，并且在必要时自动地退回到替代的多扇区算法（即，选择优化的最大数量的扇区以重建 ），提供较少的Z位置错误。 基于该Z位置错误，本发明的系统和方法还计算应该用于“即时”重建的扇区的最大数量（即，跨整个图像的每个图像） 。 这些系统和方法利用推荐的心脏重建算法协议。