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    System and method for wide cone helical image reconstruction using blending of two reconstructions
    1.
    发明授权
    System and method for wide cone helical image reconstruction using blending of two reconstructions 有权
    使用两个重建的混合进行宽锥螺旋图像重建的系统和方法

    公开(公告)号：US08995735B2

    公开(公告)日：2015-03-31

    申请号：US13478335

    申请日：2012-05-23

    申请人： Guangzhi Cao ,  Jiang Hsieh ,  Brian Edward Nett

    发明人： Guangzhi Cao ,  Jiang Hsieh ,  Brian Edward Nett

    IPC分类号： G06K9/00 ,  A61B6/03 ,  A61B6/00 ,  G01N23/04 ,  G06T11/00

    CPC分类号： G06T11/006 ,  A61B6/032 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G01N2223/643 ,  G06T2211/416

    摘要： A tomographic system includes a gantry having an opening for receiving an object to be scanned, a radiation source, a detector positioned to receive radiation from the source that passes through the object, and a computer programmed to acquire a plurality of helical projection datasets of the object, reconstruct a first image using the acquired plurality of helical projection datasets and using a first reconstruction algorithm, reconstruct a second image using the acquired plurality of helical projection datasets and using a second reconstruction algorithm that is different from the first reconstruction algorithm, extract frequency components from each of the first and second images, sum the frequency components from each of the first and second images, and inverse transform the sum of the frequency components to generate a final image.

    摘要翻译： 断层摄影系统包括具有用于接收待扫描物体的开口的台架，辐射源，被定位成接收来自源的辐射通过物体的检测器，以及被编程以获取多个螺旋​​投影数据集的计算机 使用所获取的多个螺旋投影数据集重建第一图像并使用第一重建算法，使用所获取的多个螺旋投影数据集重建第二图像，并使用与第一重建算法不同的第二重建算法，提取频率 来自第一和第二图像中的每一个的分量对来自第一和第二图像中的每一个的频率分量求和，并且对频率分量的和进行逆变换以产生最终图像。

    System and method for quality improvement in CT imaging
    2.
    发明授权
    System and method for quality improvement in CT imaging 有权
    CT成像质量改进的系统和方法

    公开(公告)号：US08699812B2

    公开(公告)日：2014-04-15

    申请号：US13156586

    申请日：2011-06-09

    申请人： Jiang Hsieh ,  Sandeep Dutta

    发明人： Jiang Hsieh ,  Sandeep Dutta

    IPC分类号： G06K9/40

    CPC分类号： G06T11/008 ,  G06T2211/424

    摘要： A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions, which when executed by a computer, cause the computer to acquire an image comprising image data reconstructed from an imaging device. The instructions further cause the computer to apply a bloom reduction algorithm to the image configured to iteratively reduce a blooming of high-density objects in the image.

    摘要翻译： 一种非瞬时计算机可读存储介质，其上存储有包括指令的计算机程序，所述指令在由计算机执行时使计算机获取包括从成像设备重建的图像数据的图像。 该指令进一步导致计算机对构造成迭代地减少图像中的高密度物体的起伏的图像应用花纹缩小算法。

    Adaptive gradient weighting technique for detector bad cell correction
    3.
    发明授权
    Adaptive gradient weighting technique for detector bad cell correction 有权
    用于检测器坏细胞校正的自适应梯度加权技术

    公开(公告)号：US08699811B2

    公开(公告)日：2014-04-15

    申请号：US13009584

    申请日：2011-01-19

    申请人： Baojun Li ,  Jiang Hsieh

    发明人： Baojun Li ,  Jiang Hsieh

    IPC分类号： G06K9/40

    CPC分类号： G01T1/2985

    摘要： An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ix and Iy for the identified cell based on neighbor cells, and calculate local gradients gx and gy between the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wx and wy based on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.

    摘要翻译： 成像系统包括具有多个单元的二维检测器，其中每个单元被配置为检测通过物体的能量或信号。 成像系统包括被编程为采集多个单元的成像数据的计算机，基于成像数据识别要校正的单元，基于相邻单元对所识别的单元插值Ix和Iy，并计算局部梯度gx和gy 基于内插，在所识别的小区及其相邻小区之间。 计算机还被编程为基于局部梯度计算加权因子wx和wy，计算所识别的单元的校正后的最终值I（0,0），并用校正的最终值校正所识别的单元。

    Method and system for controlling image reconstruction
    5.
    发明授权
    Method and system for controlling image reconstruction 有权
    控制图像重建的方法和系统

    公开(公告)号：US08538099B2

    公开(公告)日：2013-09-17

    申请号：US11087264

    申请日：2005-03-23

    申请人： Jeffrey Allen Fessler ,  Jiang Hsieh

    发明人： Jeffrey Allen Fessler ,  Jiang Hsieh

    IPC分类号： G06K9/00

    CPC分类号： G06T11/005 ,  G06T2211/424

    摘要： A method and system for controlling image reconstruction in an imaging system are provided. The method includes receiving scan data from an imaging system, and determining regularization parameters for a plurality of portions of an image for reconstructing the image based on the received scan data, wherein the regularization parameters vary for the plurality of portions of the image.

    摘要翻译： 提供了一种用于控制成像系统中的图像重建的方法和系统。 该方法包括从成像系统接收扫描数据，以及基于所接收的扫描数据确定用于重建图像的图像的多个部分的正则化参数，其中对于图像的多个部分，正则化参数变化。

    Method and system for scatter correction in X-ray imaging
    6.
    发明授权
    Method and system for scatter correction in X-ray imaging 有权
    X射线成像中散射校正的方法和系统

    公开(公告)号：US08483471B2

    公开(公告)日：2013-07-09

    申请号：US13174480

    申请日：2011-06-30

    申请人： Xiaoye Wu ,  Jiang Hsieh ,  Paavana Sainath ,  Xin Liu

    发明人： Xiaoye Wu ,  Jiang Hsieh ,  Paavana Sainath ,  Xin Liu

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/06 ,  A61B6/4085 ,  A61B6/4291 ,  A61B6/483 ,  A61B6/5205 ,  A61B6/5282

    摘要： Approaches for deriving scatter information using inverse tracking of scattered X-rays is disclosed. In certain embodiments scattered rays are tracked from respective locations on a detector to a source of the X-ray radiation, as opposed to tracking schemes that proceed from the source to the detector. In one such approach, the inverse tracking is implemented using a density integrated volume that reduces the integration steps performed.

    摘要翻译： 公开了使用散射X射线的反向跟踪导出散射信息的方法。 在某些实施例中，与从源到检测器进行的跟踪方案相反，散射光线从检测器上的相应位置跟踪到X射线辐射源。 在一种这样的方法中，使用密度集成体积来实现逆追踪，其减少执行的集成步骤。

    SYSTEM AND METHOD FOR QUALITY IMPROVEMENT IN CT IMAGING
    7.
    发明申请
    SYSTEM AND METHOD FOR QUALITY IMPROVEMENT IN CT IMAGING 有权
    CT成像质量改进的系统与方法

    公开(公告)号：US20120314922A1

    公开(公告)日：2012-12-13

    申请号：US13156586

    申请日：2011-06-09

    申请人： Jiang Hsieh ,  Sandeep Dutta

    发明人： Jiang Hsieh ,  Sandeep Dutta

    IPC分类号： G06K9/40 ,  G06K9/00

    CPC分类号： G06T11/008 ,  G06T2211/424

    摘要： A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions, which when executed by a computer, cause the computer to acquire an image comprising image data reconstructed from an imaging device. The instructions further cause the computer to apply a bloom reduction algorithm to the image configured to iteratively reduce a blooming of high-density objects in the image.

    摘要翻译： 一种非瞬时计算机可读存储介质，其上存储有包括指令的计算机程序，所述指令在由计算机执行时使计算机获取包括从成像设备重建的图像数据的图像。 该指令进一步导致计算机对构造成迭代地减少图像中的高密度物体的起伏的图像应用花纹缩小算法。

    System and method of prior image constrained image reconstruction using short scan image data and objective function minimization
    8.
    发明授权
    System and method of prior image constrained image reconstruction using short scan image data and objective function minimization 有权
    使用短扫描图像数据和目标函数最小化的先前图像约束图像重构的系统和方法

    公开(公告)号：US08204172B1

    公开(公告)日：2012-06-19

    申请号：US12950510

    申请日：2010-11-19

    申请人： Jiang Hsieh ,  Guang-Hong Chen

    发明人： Jiang Hsieh ,  Guang-Hong Chen

    IPC分类号： A61B6/00

    CPC分类号： G06T11/006 ,  A61B6/037 ,  A61B6/508 ,  G06T2211/412 ,  G06T2211/424 ,  G06T2211/436

    摘要： A tomographic system includes a gantry having an opening for receiving an object to be scanned, a radiation source, a detector positioned to receive radiation from the source that passes through the object, and a computer programmed to acquire a short scan angular range of data of the object, and define a temporal subset of the acquired short scan angular range of data for image reconstruction, the defined temporal subset of the acquired short scan angular range of data comprising approximately half of the angular range of the short scan angular range of data. The computer is programmed to reconstruct a prior image using the acquired short scan angular range of data, and input an estimated image of the object and the prior image into an objective function and minimize the objective function to reconstruct a refined image using the defined temporal subset of scan data and the prior image.

    摘要翻译： 断层摄影系统包括具有用于接收待扫描物体的开口的台架，辐射源，被定位成接收来自穿过物体的源的辐射的检测器，以及被编程为获取数据的短扫描角度范围的计算机 并且定义所获取的用于图像重构的数据的短扫描角度范围的时间子集，所述数据的所获取的短扫描角度范围的所定义的时间子集包括短扫描角度范围数据的大约一半的角度范围。 计算机被编程为使用所获取的数据的短扫描角度范围来重建先前图像，并且将对象和先前图像的估计图像输入到目标函数中，并使用定义的时间子集来最小化目标函数以重构精细图像 的扫描数据和现有图像。

    System and method of acquiring multi-energy CT imaging data
    9.
    发明授权
    System and method of acquiring multi-energy CT imaging data 有权
    获取多能CT成像数据的系统和方法

    公开(公告)号：US08199875B2

    公开(公告)日：2012-06-12

    申请号：US12760862

    申请日：2010-04-15

    申请人： Naveen Chandra ,  Xiaoye Wu ,  Thomas L. Toth ,  Jiang Hsieh

    发明人： Naveen Chandra ,  Xiaoye Wu ,  Thomas L. Toth ,  Jiang Hsieh

    IPC分类号： A61B6/00

    CPC分类号： A61B6/4035 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482

    摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller configured to apply a first kVp for a first time period, apply a second kVp for a second time period, wherein the second time period is different from the first time period, acquire a first asymmetric view dataset during at least a portion of the first time period, acquire a second asymmetric view dataset during at least a portion of the second time period, and generate an image using the acquired first and second asymmetric view datasets.

    摘要翻译： CT系统包括具有用于接收待扫描物体的开口的可旋转机架，以及被配置为在第一时间段施加第一kVp的控制器，在第二时间段施加第二kVp，其中第二时间段是不同的 从所述第一时间段在所述第一时间段的至少一部分期间获取第一非对称视图数据集，在所述第二时间段的至少一部分期间获取第二非对称视图数据集，并且使用所获取的第一和第二时间段生成图像 非对称视图数据集。