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    Methods and apparatus for modifying slice thickness during a helical scan
    2.
    发明授权
    Methods and apparatus for modifying slice thickness during a helical scan 失效
    在螺旋扫描期间改变切片厚度的方法和装置

    公开(公告)号：US6023494A

    公开(公告)日：2000-02-08

    申请号：US774868

    申请日：1996-12-19

    申请人： Robert Senzig ,  Jiang Hsieh

    发明人： Robert Senzig ,  Jiang Hsieh

    IPC分类号： A61B6/03 ,  A61B6/06 ,  G01N23/04 ,  G01N23/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/06 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

    摘要： The present invention, in one form, is a method for modifying slice thickness during a helical scan without interrupting the scan. The method includes identifying adjacent and different regions within an object to be scanned. A transition region also is identified to include a portion of each of two adjacent regions and the interface therebetween. Slice thickness is modified during the scan so that redundant data is obtained in the transition region. Particularly, in one embodiment, a variable collimator is used to scan a first region with a first slice thickness. The variable collimator is rotated at the interface between the two adjacent regions, without interrupting table translation, to scan the second region with a second slice thickness. When changing the slice thickness, the collimator also is swept so that the x-ray beam with the second slice thickness re-scans a portion of the first region within the transition region. More particularly, the collimator is swept so that the transition region is scanned with both slice thicknesses.

    摘要翻译： 本发明以一种形式是在螺旋扫描期间修改切片厚度而不中断扫描的方法。 该方法包括识别待扫描对象内的相邻区域和不同区域。 过渡区域也被识别为包括两个相邻区域中的每一个的一部分及其间的界面。 在扫描期间修改切片厚度，以便在过渡区域获得冗余数据。 特别地，在一个实施例中，使用可变准直仪来扫描具有第一切片厚度的第一区域。 可变准直器在两个相邻区域之间的界面处旋转，而不中断台平移，以第二切片厚度扫描第二区域。 当改变切片厚度时，准直仪也被扫描，使得具有第二切片厚度的X射线束重新扫描过渡区域内的第一区域的一部分。 更具体地，扫描准直器，以便以两个切片厚度扫描过渡区域。

    Methods and apparatus for scanning an object and displaying an image in a computed tomography system
    3.
    发明授权
    Methods and apparatus for scanning an object and displaying an image in a computed tomography system 失效
    用于扫描对象并在计算机断层摄影系统中显示图像的方法和装置

    公开(公告)号：US5668846A

    公开(公告)日：1997-09-16

    申请号：US733502

    申请日：1996-10-18

    申请人： Stanley H. Fox ,  Robert Senzig ,  Jiang Hsieh

    发明人： Stanley H. Fox ,  Robert Senzig ,  Jiang Hsieh

    IPC分类号： G03B42/02 ,  A61B6/03 ,  G01N23/04 ,  G06T1/00 ,  H04N5/225 ,  H04N5/32 ,  H04N13/04 ,  A61B6/00

    CPC分类号： A61B6/464 ,  G01N23/046 ,  A61B6/027 ,  G01N2223/419 ,  G01N2223/612 ,  Y10S378/901

    摘要： Methods and apparatus for scanning an object in a computed tomography system during an interventional procedure are described. The computed tomography system includes an x-ray source, a detector, and a display. The detector detects x-rays projected from the x-ray source and attenuated by an object. A processor is coupled to the detector and coupled to the display for generating images of the object on the display. A helical scan is executed to generate an image slice of the object corresponding to each gantry rotation. At least one image slice and one three-dimensional image are simultaneously displayed on the display.

    摘要翻译： 描述了在介入过程期间在计算机断层摄影系统中扫描物体的方法和装置。 计算机断层摄影系统包括x射线源，检测器和显示器。 检测器检测从X射线源投射并被物体衰减的X射线。 处理器耦合到检测器并耦合到显示器，用于在显示器上产生对象的图像。 执行螺旋扫描以生成对应于每个台架旋转的对象的图像切片。 在显示器上同时显示至少一个图像切片和一个三维图像。

    System and method for multi-energy computed tomography imaging
    5.
    发明授权
    System and method for multi-energy computed tomography imaging 有权
    多能计算机断层成像系统和方法

    公开(公告)号：US09135728B2

    公开(公告)日：2015-09-15

    申请号：US13439245

    申请日：2012-04-04

    申请人： Jiahua Fan ,  Jiang Hsieh ,  Naveen Chandra ,  Suresh Narayanan Narayanan ,  Dan Xu

    发明人： Jiahua Fan ,  Jiang Hsieh ,  Naveen Chandra ,  Suresh Narayanan Narayanan ,  Dan Xu

    IPC分类号： G06T11/00 ,  A61B6/06 ,  A61B6/00 ,  G21K1/02 ,  A61B6/03 ,  G21K1/10 ,  H01J35/26 ,  H01J35/30

    CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4021 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4291 ,  A61B6/482 ,  A61B6/582 ,  G06T2211/408 ,  G21K1/025 ,  G21K1/10 ,  H01J35/26 ,  H01J35/30

    摘要： A CT system includes a gantry, an x-ray source, a detector, and a grating collimator that includes alternating first and second materials. The system includes a controller configured to emit a first beam of x-rays from a first focal spot and to a first detector pixel, wherein the first beam of x-rays passes along a ray and through one of the first materials of the grating collimator, and subsequently emit a second beam of x-rays from a second focal spot and to the first detector pixel, wherein the second beam of x-rays passes substantially along the ray and through one of the second materials of the grating collimator. The system includes a computer programmed to generate first and second kVp image datasets using data acquired from the first beam and second beams of x-rays, and reconstruct a basis material image of the object.

    摘要翻译： CT系统包括台架，X射线源，检测器和包括交替的第一和第二材料的光栅准直器。 该系统包括控制器，该控制器被配置为从第一焦点和第一检测器像素发射第一X射线束，其中第一射线束沿着光线并通过光栅准直器的第一材料之一 并且随后从第二焦点和第一检测器像素发射第二射线束，其中所述第二光束X射线基本上沿着所述光线并通过所述光栅准直器的所述第二材料之一通过。 该系统包括被编程为使用从第一光束和第二光束获得的数据来生成第一和第二kVp图像数据集的计算机，并重构对象的基础材料图像。

    System and method for material decomposition optimization in image domain
    6.
    发明授权
    System and method for material decomposition optimization in image domain 有权
    图像域中物质分解优化的系统和方法

    公开(公告)号：US08588494B2

    公开(公告)日：2013-11-19

    申请号：US12915195

    申请日：2010-10-29

    申请人： Bruno Kristiaan Bernard De Man ,  Jiang Hsieh ,  Naveen Chandra ,  Jed Douglas Pack ,  Jiahua Fan

    发明人： Bruno Kristiaan Bernard De Man ,  Jiang Hsieh ,  Naveen Chandra ,  Jed Douglas Pack ,  Jiahua Fan

    IPC分类号： G06K9/00 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

    CPC分类号： H04B1/1638 ,  G06T11/008 ,  G06T2211/408

    摘要： A system and method for material decomposition optimization in the image domain include a non-transitory computer readable medium has stored thereon a sequence of instructions which, when executed by a computer, causes the computer to access a reconstructed basis material image. For a first voxel of the reconstructed basis material image, the instructions also cause the computer to optimize a concentration of a pair of materials (a,b) in the first voxel exclusively in the image domain and based on a first probability based on random perturbations and a second probability based on random perturbations. The optimization is further based on a third probability based on known materials and a fourth probability based on concentrations of the pair of materials in a pair of voxels neighboring the first voxel.

    摘要翻译： 用于图像域中的材料分解优化的系统和方法包括其上存储有一系列指令的非瞬时计算机可读介质，所述指令序列当由计算机执行时使计算机访问重建的基础材料图像。 对于重建的基材图像的第一体素，指令还使计算机优化仅在图像域中的第一体素中的一对材料（a，b）的浓度，并且基于基于随机扰动的第一概率 和基于随机扰动的第二概率。 优化进一步基于基于已知材料的第三概率和基于邻近第一体素的一对体素中的该对材料对的浓度的第四概率。

    SYSTEM AND METHOD FOR MULTI-ENERGY COMPUTED TOMOGRAPHY IMAGING
    7.
    发明申请
    SYSTEM AND METHOD FOR MULTI-ENERGY COMPUTED TOMOGRAPHY IMAGING 有权
    多功能计算机图像成像系统与方法

    公开(公告)号：US20130266115A1

    公开(公告)日：2013-10-10

    申请号：US13439245

    申请日：2012-04-04

    申请人： Jiahua Fan ,  Jiang Hsieh ,  Naveen Chandra ,  Suresh Narayanan Narayanan ,  Dan Xu

    发明人： Jiahua Fan ,  Jiang Hsieh ,  Naveen Chandra ,  Suresh Narayanan Narayanan ,  Dan Xu

    IPC分类号： A61B6/08 ,  A61B6/03

    CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4021 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4291 ,  A61B6/482 ,  A61B6/582 ,  G06T2211/408 ,  G21K1/025 ,  G21K1/10 ,  H01J35/26 ,  H01J35/30

    摘要： A CT system includes a gantry, an x-ray source, a detector, and a grating collimator that includes alternating first and second materials. The system includes a controller configured to emit a first beam of x-rays from a first focal spot and to a first detector pixel, wherein the first beam of x-rays passes along a ray and through one of the first materials of the grating collimator, and subsequently emit a second beam of x-rays from a second focal spot and to the first detector pixel, wherein the second beam of x-rays passes substantially along the ray and through one of the second materials of the grating collimator. The system includes a computer programmed to generate first and second kVp image datasets using data acquired from the first beam and second beams of x-rays, and reconstruct a basis material image of the object.

    摘要翻译： CT系统包括台架，X射线源，检测器和包括交替的第一和第二材料的光栅准直器。 该系统包括控制器，该控制器被配置为从第一焦点和第一检测器像素发射第一X射线束，其中第一射线束沿着光线并通过光栅准直器的第一材料之一 并且随后从第二焦点和第一检测器像素发射第二射线束，其中所述第二光束X射线基本上沿着所述光线并通过所述光栅准直器的所述第二材料之一通过。 该系统包括被编程为使用从第一光束和第二光束获得的数据来生成第一和第二kVp图像数据集的计算机，并重构对象的基础材料图像。

    METHODS AND APPARATUS FOR CT SMOOTHING TO REDUCE ARTIFACTS
    8.
    发明申请
    METHODS AND APPARATUS FOR CT SMOOTHING TO REDUCE ARTIFACTS 审中-公开
    CT扫描减少手术的方法和设备

    公开(公告)号：US20130163714A9

    公开(公告)日：2013-06-27

    申请号：US13545743

    申请日：2012-07-10

    申请人： Jianying Li ,  Jiang Hsieh

    发明人： Jianying Li ,  Jiang Hsieh

    IPC分类号： G06K9/44 ,  H05G1/60

    CPC分类号： G06T11/005 ,  A61B6/027 ,  G06T11/003 ,  G06T2211/421

    摘要： 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.

    摘要翻译： 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。

    METHOD AND APPARATUS FOR RECONSTRUCTING AN IMAGE OF AN OBJECT
    9.
    发明申请
    METHOD AND APPARATUS FOR RECONSTRUCTING AN IMAGE OF AN OBJECT 审中-公开
    用于重构对象图像的方法和装置

    公开(公告)号：US20130156163A1

    公开(公告)日：2013-06-20

    申请号：US13330128

    申请日：2011-12-19

    申请人： Xin Liu ,  Jiang Hsieh

    发明人： Xin Liu ,  Jiang Hsieh

    IPC分类号： G01D18/00

    CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/037 ,  A61B6/4035 ,  A61B6/4417 ,  A61B6/482 ,  A61B6/5211 ,  A61B6/582 ,  A61B6/583 ,  G06T2211/408

    摘要： A method for reconstructing an image of an object includes performing an air calibration on an imaging system to generate set of air calibration data, estimating an x-ray spectrum using the air calibration data, and reconstructing an image of an object using the estimated x-ray spectrum. An imaging system and a non-transitory computer readable medium are also described herein.

    摘要翻译： 一种用于重建对象的图像的方法包括在成像系统上执行空气校准以产生一组空气校准数据，使用空气校准数据估计X射线谱，以及使用所估计的x轴重建物体的图像， 射线谱。 本文还描述了成像系统和非暂时性计算机可读介质。