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    Step-and-shoot cardiac CT imaging
    21.
    发明授权
    Step-and-shoot cardiac CT imaging 有权
    分步心脏CT成像

    公开(公告)号：US07313213B1

    公开(公告)日：2007-12-25

    申请号：US11160028

    申请日：2005-06-06

    Applicant: Jiang Hsieh ,  Jianying Li ,  John H. Londt ,  Melissa Vass ,  Darin R. Okerlund ,  Bernice Hoppel

    Inventor： Jiang Hsieh ,  Jianying Li ,  John H. Londt ,  Melissa Vass ,  Darin R. Okerlund ,  Bernice Hoppel

    IPC: G01N23/083

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

    Abstract: A CT imaging system has a rotatable gantry, a table movable fore and aft through an opening defined within the rotatable gantry, and a controller that incrementally moves a subject disposed on the table through a number of discrete data acquisition positions for the acquisition of physiologically gated CT data. The controller also coordinates acquisition of imaging data from the subject at a first data acquisition position within a physiological cycle of the subject and only advances the subject to a next data acquisition position if the imaging data acquired at the first data acquisition position is deemed acceptable. The controller also detects irregularities and physiological motion of the subject and responsive thereto, suspends data acquisition until the irregularity passes, such as, suspending data acquisition until a next cardiac cycle if a heart arrhythmia is detected.

    Abstract translation: CT成像系统具有可旋转的台架，通过可旋转机架中限定的开口前后运动的桌子，以及控制器，其通过多个离散的数据采集位置递增地移动设置在桌子上的被摄体，用于采集生理门控 CT数据。 如果在第一数据获取位置处获取的成像数据被认为是可接受的，则控制器还协调在对象的生理周期内的第一数据获取位置处从被摄体获取成像数据，并仅将对象前进到下一个数据采集位置。 控制器还检测对象的不规则和生理运动并响应于此，停止数据采集，直到不规则通过，例如，如果检测到心律不齐，则暂停数据采集直到下一个心动周期。

    Methods and apparatus for CT smoothing to reduce artifacts
    23.
    发明申请
    Methods and apparatus for CT smoothing to reduce artifacts 审中-公开
    用于CT平滑减少伪像的方法和装置

    公开(公告)号：US20050201605A1

    公开(公告)日：2005-09-15

    申请号：US10798650

    申请日：2004-03-11

    Applicant: Jianying Li ,  Jiang Hsieh

    Inventor： Jianying Li ,  Jiang Hsieh

    IPC: G06K9/00

    CPC classification number: G06T11/005 ,  A61B6/027 ,  G06T11/003 ,  G06T2211/421

    Abstract: A method for reconstructing an image of an object includes scanning an object using a computed tomographic (CT) imaging apparatus to acquire projections of the object. A set of thresholds are determined utilizing the projections, and selected smoothing kernels are associated with the thresholds. The method further includes utilizing the smoothing kernels and the projections to produce smoothed projections in accordance with the thresholds and filtering and backprojecting the smoothed projections to generate an image of the object.

    Abstract translation: 用于重建对象的图像的方法包括使用计算机断层摄影（CT）成像设备扫描对象以获取对象的投影。 使用投影来确定一组阈值，并且所选择的平滑内核与阈值相关联。 该方法还包括利用平滑内核和投影来根据阈值产生平滑的投影，并过滤和反投影平滑的投影以生成对象的图像。

    Reconstruction in helical computed tomography using asymmetric modeling of detector sensitivity
    24.
    发明授权
    Reconstruction in helical computed tomography using asymmetric modeling of detector sensitivity 失效
    螺旋计算机断层扫描重建使用检测器灵敏度的不对称建模

    公开(公告)号：US06359956B1

    公开(公告)日：2002-03-19

    申请号：US09739027

    申请日：2000-12-15

    Applicant: Jiang Hsieh ,  Jianying Li

    Inventor： Jiang Hsieh ,  Jianying Li

    IPC: A61B603

    CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4085

    Abstract: Helical acquisition of thin computed tomography slices by collimation of the fan beam to less than the width of a multi-row detector is provided by interpolation after application of the weighting scheme correcting for asymmetry in the detector profile of the detectors with such collimation.

    Abstract translation: 通过对采用这种准直的检测器的检测器轮廓中的不对称性进行校正的加权方案之间的内插来提供通过扇形光束准直小于多行检测器宽度的薄计算机断层摄影切片的螺旋获取。

    Step-and-shoot cardiac CT imaging
    27.
    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
    28.
    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
    30.
    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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