利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

353 条记录 (耗时 0.031 秒)

    APPARATUS AND METHOD FOR SPECTRAL PROJECTION IMAGING WITH FAST KV SWITCHING
    82.
    发明申请
    APPARATUS AND METHOD FOR SPECTRAL PROJECTION IMAGING WITH FAST KV SWITCHING 有权
    用快速KV切换进行光谱投影成像的装置和方法

    公开(公告)号：US20110150175A1

    公开(公告)日：2011-06-23

    申请号：US12642945

    申请日：2009-12-21

    申请人： Jiang Hsieh ,  Naveen Chandra ,  Steven J. Woloschek ,  Robert F. Senzig

    发明人： Jiang Hsieh ,  Naveen Chandra ,  Steven J. Woloschek ,  Robert F. Senzig

    IPC分类号： H05G1/60 ,  G06K9/00

    CPC分类号： A61B6/482 ,  A61B6/4021 ,  A61B6/4266 ,  A61B6/488 ,  G01T1/2985

    摘要： A CT system includes a gantry, an x-ray source configured to project x-rays toward an object, an x-ray detector positioned to receive x-rays from the x-ray source that pass through the object, a generator configured to energize the x-ray source to a first voltage and to a second voltage that is distinct from the first voltage, and a controller configured to cause the gantry to position the source and generator at a circumferential position during an imaging session, pass the object through the opening during the imaging session, cause the generator to energize the x-ray source to the first voltage and to the second voltage, acquire imaging data while the generator energizes the x-ray source to the first voltage and to the second voltage while the rotatable gantry is at the circumferential position, and generate an image using the imaging data.

    摘要翻译： 一个CT系统包括一个配置成将x射线投射到物体的台架，x射线源，x射线探测器，其被定位成从X射线源接收穿过物体的x射线， x射线源到第一电压和不同于第一电压的第二电压;以及控制器，其被配置为使得台架在成像会话期间将源和发生器定位在圆周位置，使物体通过 在成像会话期间打开，使得发生器将x射线源激励到第一电压和第二电压，获取成像数据，同时发生器将X射线源激励到第一电压和第二电压，同时可旋转 龙门架处于圆周位置，并使用成像数据生成图像。

    ADAPTIVE GRADIENT WEIGHTING TECHNIQUE FOR DETECTOR BAD CELL CORRECTION
    83.
    发明申请
    ADAPTIVE GRADIENT WEIGHTING TECHNIQUE FOR DETECTOR BAD CELL CORRECTION 有权
    用于检测器BAD细胞校正的自适应梯度称重技术

    公开(公告)号：US20110116700A1

    公开(公告)日：2011-05-19

    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： G06K9/00 ,  G06F19/00

    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。

    Methods and apparatus for reconstructing thick image slices
    84.
    发明授权
    Methods and apparatus for reconstructing thick image slices 失效
    用于重建厚图像切片的方法和装置

    公开(公告)号：US07646842B2

    公开(公告)日：2010-01-12

    申请号：US11233670

    申请日：2005-09-23

    申请人： Jiang Hsieh ,  Xiangyang Tang

    发明人： Jiang Hsieh ,  Xiangyang Tang

    IPC分类号： A61B6/00

    CPC分类号： G01N23/046 ,  A61B6/027 ,  A61B6/032 ,  G01N2223/419 ,  G06T11/005

    摘要： A method for obtaining data includes scanning an object using a CT imaging system having at least two detector rows to acquire projection data, wherein the projection data includes at least some data obtained from at least two rows of the detector array, and reconstructing data representative an image of the object utilizing the projection data wherein the reconstruction includes pipelining the acquired projection data through a pipeline of operations including column-filtering, tomographic filtering, and backprojection. Thick reconstructed images using 3D backprojection can be obtained with significantly lessened artifacts relative to conventional 3D backprojection image reconstructions.

    摘要翻译： 一种用于获取数据的方法包括使用具有至少两个检测器行的CT成像系统来扫描物体以获取投影数据，其中所述投影数据包括从所述检测器阵列的至少两行获得的至少一些数据，以及重建表示 使用投影数据的对象的图像，其中重建包括通过包括列过滤，断层扫描和反投影的操作流水线对所获取的投影数据进行流水线化。 相对于传统的3D反投影图像重建，可以获得使用3D反投影的厚重构图像，并显着减少伪像。

    Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned
    86.
    发明授权
    Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned 有权
    使用针对待扫描的被摄体定制的能量束的放射照相成像的方法和装置

    公开(公告)号：US07630477B2

    公开(公告)日：2009-12-08

    申请号：US11831034

    申请日：2007-07-31

    申请人： Thomas L. Toth ,  J. Eric Tkaczyk ,  Jiang Hsieh

    发明人： Thomas L. Toth ,  J. Eric Tkaczyk ,  Jiang Hsieh

    IPC分类号： G21K3/00 ,  A61B6/03

    CPC分类号： A61B6/4042 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4488 ,  G01T1/2985 ,  G21K1/04 ,  G21K1/10

    摘要： A method and apparatus for tailoring the profile of an x-ray beam for radiographic imaging for a specific subject is disclosed. The invention includes a filter assembly having a pair of filters, each of which may be dynamically controlled by a motor assembly during data acquisition. The filters are positionable in the x-ray beam so as to shape the intensity profile of the x-ray beam. In one exemplary embodiment, the filters are dynamically positioned during CT data acquisition based on the shape of the subject. A method of determining the shape of the subject prior to CT data acquisition is also disclosed.

    摘要翻译： 公开了一种用于定制用于特定对象的X射线成像的X射线束的轮廓的方法和装置。 本发明包括具有一对滤波器的滤波器组件，每个滤波器可以在数据采集期间由电机组件动态地控制。 过滤器可以定位在x射线束中，以便形成x射线束的强度分布。 在一个示例性实施例中，基于对象的形状，在CT数据采集期间，滤波器被动态地定位。 还公开了在CT数据采集之前确定对象的形状的方法。

    Method and apparatus for reducing cone beam artifacts using spatially varying weighting functions
    87.
    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

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

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

    IPC分类号： A61B6/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/463 ,  A61B6/503 ,  A61B6/583

    摘要： 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.

    摘要翻译： 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。

    Correlation-based motion estimation of object to be imaged
    88.
    发明授权
    Correlation-based motion estimation of object to be imaged 有权
    要成像的物体的相关运动估计

    公开(公告)号：US07587022B1

    公开(公告)日：2009-09-08

    申请号：US11277243

    申请日：2006-03-23

    申请人： Jiang Hsieh ,  Yuchuan Wei ,  Ge Wang

    发明人： Jiang Hsieh ,  Yuchuan Wei ,  Ge Wang

    IPC分类号： A61B6/00

    CPC分类号： A61B6/481 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/501 ,  A61B6/504 ,  A61B6/5264 ,  G06T11/005 ,  G06T2211/412

    摘要： An imaging system in an example comprises an x-ray source, a detector, a data acquisition system (DAS), and a computer. The x-ray source emits a beam of x-rays toward an object to be imaged. The detector receives x-rays emitted by the x-ray source. The DAS is operably connected to the detector. The computer is operably connected to the DAS and programmed to estimate motion of the object on a correlation-basis and through employment of earlier-collected data.

    摘要翻译： 示例中的成像系统包括x射线源，检测器，数据采集系统（DAS）和计算机。 x射线源向待成像的物体发射一束x射线。 检测器接收x射线源发射的X射线。 DAS可操作地连接到检测器。 计算机可操作地连接到DAS，并被编程以基于相关性估计对象的运动并且通过使用早期收集的数据。

    CT image reconstruction through employment of function that describes interpreted movement of source around particular point of object
    90.
    发明授权
    CT image reconstruction through employment of function that describes interpreted movement of source around particular point of object 有权
    通过使用功能描述CT图像重建，其描述围绕特定物体点的源的解释移动

    公开(公告)号：US07376213B1

    公开(公告)日：2008-05-20

    申请号：US11276301

    申请日：2006-02-23

    申请人： Yuchuan Wei ,  Jiang Hsieh ,  Ge Wang

    发明人： Yuchuan Wei ,  Jiang Hsieh ,  Ge Wang

    IPC分类号： G01N23/00

    CPC分类号： G01T1/2985 ,  A61B6/027 ,  A61B6/032 ,  G06T11/006 ,  G06T2211/412

    摘要： A CT system in an example comprises an x-ray source, a detector, a data acquisition system (DAS), and a computer. The x-ray source emits a beam of x-rays toward an object to be imaged. The detector receives x-rays emitted by the x-ray source. The DAS is operably connected to the detector. The computer is operably connected to the DAS. The computer is programmed to reconstruct a CT image of the object to comprise a plurality of CT images, of a respective plurality of points of the object, through employment of a function that describes how many times a trajectory curve, of an interpretation of relative movement between the x-ray source and the object as that of the x-ray source, goes around each of the plurality of points of the object.

    摘要翻译： 示例中的CT系统包括x射线源，检测器，数据采集系统（DAS）和计算机。 x射线源向待成像的物体发射一束x射线。 检测器接收x射线源发射的X射线。 DAS可操作地连接到检测器。 计算机可操作地连接到DAS。 计算机被编程为通过使用描述相对运动的解释的轨迹曲线的函数的函数来重构对象的CT图像以包括对象的相应多个点的多个CT图像 在X射线源和与X射线源的对象之间，绕过物体的多个点中的每一个。