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    Method and apparatus for reducing cone beam artifacts using spatially varying weighting functions
    32.
    发明授权
    Method and apparatus for reducing cone beam artifacts using spatially varying weighting functions 有权
    使用空间变化的加权函数减少锥束伪像的方法和装置

    公开(公告)号：US07613275B2

    公开(公告)日：2009-11-03

    申请号：US11305929

    申请日：2005-12-19

    Applicant: Jianying Li ,  Jiang Hsieh ,  Melissa L. Vass ,  Xiangyang Tang ,  John Howard Londt ,  Darin Robert Okerlund

    Inventor： Jianying Li ,  Jiang Hsieh ,  Melissa L. Vass ,  Xiangyang Tang ,  John Howard Londt ,  Darin Robert Okerlund

    IPC: A61B6/00

    CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/463 ,  A61B6/503 ,  A61B6/583

    Abstract: A method for combining images acquired using helical half-scan imaging comprises identifying an image plane within an overlap region comprising data from first and second view streams representative of first and second cycles of acquired image data. The image plane comprises the same anatomical structure. First and second weighting functions are calculated for first and second images based on first and second tube positions of an x-ray tube. The first and second images correspond to the image plane and are from the first and second view streams, respectively. The first and second tube positions also correspond to the image plane. A weighted image is then formed based on the first and second weighting functions and the first and second images.

    Abstract translation: 一种用于组合使用螺旋半扫描成像获取的图像的方法包括在包括表示所获取的图像数据的第一和第二周期的第一和第二视图流的数据的重叠区域内识别图像平面。 图像平面包括相同的解剖结构。 基于X射线管的第一和第二管位置对第一和第二图像计算第一和第二加权函数。 第一和第二图像分别对应于图像平面并且分别来自第一和第二视图流。 第一和第二管位置也对应于图像平面。 然后基于第一和第二加权函数以及第一和第二图像形成加权图像。

    Step-and-shoot cardiac CT imaging
    37.
    发明授权
    Step-and-shoot cardiac CT imaging 有权
    分步心脏CT成像

    公开(公告)号：US07558363B2

    公开(公告)日：2009-07-07

    申请号：US11941219

    申请日：2007-11-16

    Applicant: Jiang Hsieh ,  Jianying Li ,  Melissa L. Vass ,  Xiangyang Tang ,  Darin Robert Okerlund ,  Bernice E. Hoppel ,  Kelly Ann Mohr ,  John Howard Londt

    Inventor： Jiang Hsieh ,  Jianying Li ,  Melissa L. Vass ,  Xiangyang Tang ,  Darin Robert Okerlund ,  Bernice E. Hoppel ,  Kelly Ann Mohr ,  John Howard Londt

    IPC: G01N23/083 ,  H05G1/62

    CPC classification number: A61B5/0464 ,  A61B6/027 ,  A61B6/032 ,  A61B6/503 ,  A61B6/5264 ,  A61B6/527 ,  A61B6/541

    Abstract: A CT imaging system includes a gantry and a table in a movable relationship with the gantry. The CT imaging system also includes a controller configured to control relative movement between a subject disposed on the table and the gantry from a first data acquisition position to a second data acquisition position. The controller is also configured to determine a total scan time based on a first time for acquiring imaging data at the first data acquisition position and a second time for transitioning from the first data acquisition position to the second data acquisition position. The controller is also configured to disable data acquisition in an immediately subsequent cardiac cycle and re-enable data acquisition in the cardiac cycle following the immediately subsequent cardiac cycle if the total scan time exceeds one cardiac cycle of the subject. A method of CT imaging is also disclosed.

    Abstract translation: CT成像系统包括台架和与台架可动关系的台。 CT成像系统还包括控制器，其被配置为控制设置在桌子上的物体与从第一数据采集位置到第二数据采集位置的台架之间的相对运动。 控制器还被配置为基于第一时间来确定用于在第一数据获取位置处获取成像数据的总扫描时间，以及用于从第一数据获取位置转换到第二数据获取位置的第二时间。 控制器还被配置为在紧随其后的心动周期中禁用数据采集，并且如果总扫描时间超过对象的一个​​心动周期，则在紧随其后的心动周期之后重新启用心动周期中的数据采集。 还公开了CT成像的方法。

    STEP-AND-SHOOT CARDIAC CT IMAGING
    38.
    发明申请
    STEP-AND-SHOOT CARDIAC CT IMAGING 有权
    STEP-AND-SHOOT CARDIAC CT成像

    公开(公告)号：US20080063137A1

    公开(公告)日：2008-03-13

    申请号：US11941219

    申请日：2007-11-16

    Applicant: Jiang Hsieh ,  Jianying Li ,  Melissa Vass ,  Xiangyang Tang ,  Darin Okerlund ,  Bernice Hoppel ,  Kelly Mohr ,  John Londt

    Inventor： Jiang Hsieh ,  Jianying Li ,  Melissa Vass ,  Xiangyang Tang ,  Darin Okerlund ,  Bernice Hoppel ,  Kelly Mohr ,  John Londt

    IPC: A61B6/12

    CPC classification number: A61B5/0464 ,  A61B6/027 ,  A61B6/032 ,  A61B6/503 ,  A61B6/5264 ,  A61B6/527 ,  A61B6/541

    Abstract: A CT imaging system includes a gantry and a table in a movable relationship with the gantry. The CT imaging system also includes a controller configured to control relative movement between a subject disposed on the table and the gantry from a first data acquisition position to a second data acquisition position. The controller is also configured to determine a total scan time based on a first time for acquiring imaging data at the first data acquisition position and a second time for transitioning from the first data acquisition position to the second data acquisition position. The controller is also configured to disable data acquisition in an immediately subsequent cardiac cycle and re-enable data acquisition in the cardiac cycle following the immediately subsequent cardiac cycle if the total scan time exceeds one cardiac cycle of the subject. A method of CT imaging is also disclosed.

    Abstract translation: CT成像系统包括台架和与台架可动关系的台。 CT成像系统还包括控制器，其被配置为控制设置在桌子上的物体与从第一数据采集位置到第二数据采集位置的台架之间的相对运动。 控制器还被配置为基于第一时间来确定用于在第一数据获取位置处获取成像数据的总扫描时间，以及用于从第一数据获取位置转换到第二数据获取位置的第二时间。 控制器还被配置为在紧随其后的心动周期中禁用数据采集，并且如果总扫描时间超过对象的一个​​心动周期，则在紧随其后的心动周期之后重新启用心动周期中的数据采集。 还公开了CT成像的方法。

    Method and system for filtering scan data
    40.
    发明申请
    Method and system for filtering scan data 有权
    扫描数据过滤的方法和系统

    公开(公告)号：US20060257011A1

    公开(公告)日：2006-11-16

    申请号：US11126086

    申请日：2005-05-10

    Applicant: Jianying Li ,  Jiang Hsieh

    Inventor： Jianying Li ,  Jiang Hsieh

    IPC: G06K9/00

    CPC classification number: G06T5/002 ,  G06T5/20 ,  G06T11/005 ,  G06T2200/04 ,  G06T2207/10081 ,  G06T2207/10104 ,  G06T2207/10108 ,  G06T2207/30048

    Abstract: Methods and systems for filtering scan data are provided. The method includes generating scan data from a plurality of signals. The method further includes adjusting an initial filtering threshold, independent of an amplitude of the signals, to generate an adjusted threshold. Furthermore, the method includes filtering the scan data, based on the adjusted threshold.

    Abstract translation: 提供了扫描数据过滤的方法和系统。 该方法包括从多个信号产生扫描数据。 该方法还包括调整独立于信号幅度的初始滤波阈值以产生经调整的阈值。 此外，该方法包括基于调整后的阈值对扫描数据进行滤波。

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