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    Methods and apparatus for calibrating CT X-ray beam tracking loop
    3.
    发明申请
    Methods and apparatus for calibrating CT X-ray beam tracking loop 失效
    用于校准CT X射线束追踪回路的方法和装置

    公开(公告)号：US20060251210A1

    公开(公告)日：2006-11-09

    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： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

    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。

    Computed tomography dose indexing phantom selection for dose reporting
    4.
    发明授权
    Computed tomography dose indexing phantom selection for dose reporting 有权
    计算机断层扫描剂量指数幻像选择用于剂量报告

    公开(公告)号：US07082183B2

    公开(公告)日：2006-07-25

    申请号：US10710563

    申请日：2004-07-21

    申请人： Thomas Louis Toth ,  David Michael Hoffman

    发明人： Thomas Louis Toth ,  David Michael Hoffman

    IPC分类号： H05G1/28

    CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/488 ,  A61B6/583 ,  G06F19/00

    摘要： A computed tomography assembly is providing including an x-ray gantry assembly, an x-ray source projecting a beam of x-rays, a detector assembly positioned opposite the x-ray source and receiving the beam of x-rays, and a control mechanism in communication with the x-ray source and the detector assembly. The control mechanism includes logic adapted to: execute at least one scout scan of the object to produce a first scout scan image; generate an elliptical patient model based on the first scout scan image; match the elliptical patient model to a phantom diameter approximation; generate a dose report based on the phantom diameter approximation; and display said dose report on a display in communication with the control mechanism.

    摘要翻译： 提供了一种计算机断层摄影组件，其包括x射线门架组件，投射X射线束的x射线源，与x射线源相对设置并接收x射线束的检测器组件，以及控制机构 与x射线源和检测器组件通信。 所述控制机构包括适于：执行对象的至少一次侦察扫描以产生第一侦察扫描图像的逻辑; 基于第一侦察扫描图像生成椭圆形病人模型; 将椭圆形患者模型与幻影直径近似相匹配; 基于幻影直径近似生成剂量报告; 并在与控制机构通信的显示器上显示所述剂量报告。

    Methods and apparatus for dynamical helical scanned image production
    5.
    发明授权
    Methods and apparatus for dynamical helical scanned image production 有权
    动态螺旋扫描图像制作方法与装置

    公开(公告)号：US06977984B2

    公开(公告)日：2005-12-20

    申请号：US10680688

    申请日：2003-10-07

    申请人： Jiang Hsieh ,  Eugene Clifford Williams ,  Thomas Louis Toth

    发明人： Jiang Hsieh ,  Eugene Clifford Williams ,  Thomas Louis Toth

    IPC分类号： A61B5/055 ,  A61B6/03 ,  G01N23/04 ,  G06T1/00

    CPC分类号： A61B6/032 ,  A61B5/055 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  Y10S378/901

    摘要： The present invention provides a method for producing images of an object. The method includes dynamically helically scanning an object on a moving table utilizing a scanning imaging system. During the scan, projection views of the object are acquired and stored together with corresponding table locations. A plane for reconstruction of an image of the object is selected. The stored table locations are used to determine geometric variables applicable to the stored projection views; and the stored projection views are filtered and backprojected utilizing the geometrical variables to reconstruct an image of the object at the reconstruction plane.

    摘要翻译： 本发明提供了一种用于产生对象的图像的方法。 该方法包括利用扫描成像系统动态地螺旋扫描移动台上的物体。 在扫描期间，获取对象的投影视图并与对应的表位置一起存储。 选择用于重建对象的图像的平面。 存储的表位置用于确定适用于存储的投影视图的几何变量; 并且利用几何变量对所存储的投影视图进行滤波和反投影，以重构在重构平面处的对象的图像。

    Methods and apparatus for hybrid cone beam image reconstruction
    6.
    发明授权
    Methods and apparatus for hybrid cone beam image reconstruction 有权
    混合锥束图像重建方法与装置

    公开(公告)号：US08131042B2

    公开(公告)日：2012-03-06

    申请号：US12028543

    申请日：2008-02-08

    申请人： Xiangyang Tang ,  Jiang Hsieh ,  Fang Dong ,  Jiahua Fan ,  Thomas Louis Toth

    发明人： Xiangyang Tang ,  Jiang Hsieh ,  Fang Dong ,  Jiahua Fan ,  Thomas Louis Toth

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  G06T11/006 ,  G06T2211/421 ,  Y10S378/901

    摘要： A method for reconstructing an image using an imaging apparatus that includes a radiation source, a detector array, and a computer. The method includes performing a helical scan of an object at a selected helical pitch using the radiation source and detector array to obtain image data, and reconstructing an image of the object utilizing the computer programmed to perform a hybrid cone beam image reconstruction having ray-wise 3D weighting, wherein the weighting is dependent upon both helical pitch and z-distance.

    摘要翻译： 一种使用包括辐射源，检测器阵列和计算机的成像装置重建图像的方法。 该方法包括使用辐射源和检测器阵列以选定的螺距进行物体的螺旋扫描以获得图像数据，以及使用被编程为执行具有射线方向的混合锥形束图像重建的计算机来重建物体的图像 3D加权，其中加权取决于螺距和z距离。

    METHODS AND APPARATUS FOR HYBRID CONE BEAM IMAGE RECONSTRUCTION
    9.
    发明申请
    METHODS AND APPARATUS FOR HYBRID CONE BEAM IMAGE RECONSTRUCTION 有权
    混合光束图像重构的方法和装置

    公开(公告)号：US20090202126A1

    公开(公告)日：2009-08-13

    申请号：US12028543

    申请日：2008-02-08

    申请人： Xiangyang Tang ,  Jiang Hsieh ,  Fang Dong ,  Jiahua Fan ,  Thomas Louis Toth

    发明人： Xiangyang Tang ,  Jiang Hsieh ,  Fang Dong ,  Jiahua Fan ,  Thomas Louis Toth

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  G06T11/006 ,  G06T2211/421 ,  Y10S378/901

    摘要： A method for reconstructing an image using an imaging apparatus that includes a radiation source, a detector array, and a computer. The method includes performing a helical scan of an object at a selected helical pitch using the radiation source and detector array to obtain image data, and reconstructing an image of the object utilizing the computer programmed to perform a hybrid cone beam image reconstruction having ray-wise 3D weighting, wherein the weighting is dependent upon both helical pitch and z-distance.

    摘要翻译： 一种使用包括辐射源，检测器阵列和计算机的成像装置重建图像的方法。 该方法包括使用辐射源和检测器阵列以选定的螺距进行物体的螺旋扫描以获得图像数据，以及使用被编程为执行具有射线方向的混合锥形束图像重建的计算机来重建物体的图像 3D加权，其中加权取决于螺距和z距离。

    METHODS AND SYSTEMS FOR ENHANCED ACCURACY IMAGE NOISE ADDITION
    10.
    发明申请
    METHODS AND SYSTEMS FOR ENHANCED ACCURACY IMAGE NOISE ADDITION 审中-公开
    增强精度图像噪声补充的方法和系统

    公开(公告)号：US20080118128A1

    公开(公告)日：2008-05-22

    申请号：US11562157

    申请日：2006-11-21

    申请人： Thomas Louis Toth

    发明人： Thomas Louis Toth

    IPC分类号： G06K9/00

    CPC分类号： G06T11/003

    摘要： Methods and apparatus for reconstructing a simulated image of an object that includes a predetermined amount of noise are provided. A method includes receiving a base image, determining an amount of noise in the base image, generating a noise field image based on the determined amount of noise in the base image, combining the noise field image and the base image to generate a simulated image that includes the predetermined amount of noise, and displaying the simulated image.

    摘要翻译： 提供了用于重建包含预定量噪声的对象的模拟图像的方法和装置。 一种方法包括接收基本图像，确定基本图像中的噪声量，基于确定的基本图像中的噪声量产生噪声场图像，组合噪声场图像和基本图像以产生模拟图像， 包括预定量的噪声，并显示模拟图像。