公开(公告)号：US5761333A

公开(公告)日：1998-06-02

申请号：US914697

申请日：1997-08-19

申请人： Jiang Hsieh ,  Stanley H. Fox

发明人： Jiang Hsieh ,  Stanley H. Fox

IPC分类号： G06T5/00 ,  G06K9/00

CPC分类号： G06T7/0081 ,  G06T5/008 ,  G06T7/0012 ,  G06T2207/10081 ,  G06T2207/30016

摘要： The present invention, in one form, is a method for improving grey-white matter differentiation between regions of an image to be reconstructed from data obtained by a CT scan. More particularly, in accordance with one form of the present invention, a re-mapping function is utilized to generate CT numbers. In accordance with such function, CT numbers that are outside the grey-white matter region are not "stretched". The CT numbers within such region are "stretched" with the larger "stretch" centered on the grey-white matter region and tapering off at the boundary. Using such a function, grey-white matter differentiation is improved without adversely affecting quality and accuracy.

摘要翻译： 本发明在一种形式中是一种通过CT扫描得到的数据来改善待重建图像的区域之间的灰白质差异的方法。 更具体地，根据本发明的一种形式，利用重映射功能来产生CT数。 根据这样的功能，在灰白色区域外的CT数字不会“拉伸”。 该区域内的CT数“拉伸”，以灰白色区域为中心的较大的“拉伸”被拉伸，并在边界逐渐变细。 使用这样的功能，灰白质分化改善而不会不利地影响质量和精度。

公开(公告)号：US06370217B1

公开(公告)日：2002-04-09

申请号：US09307400

申请日：1999-05-07

申请人： Hui Hu ,  Jiang Hsieh ,  Stanley H. Fox ,  Kishore C. Acharya ,  Hui David He ,  Yi Sun

发明人： Hui Hu ,  Jiang Hsieh ,  Stanley H. Fox ,  Kishore C. Acharya ,  Hui David He ,  Yi Sun

IPC分类号： A61B600

CPC分类号： A61B6/541 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： The present invention, in one form is an imaging system for generating images of an entire object. In one embodiment, a physiological cycle unit is used to determine the cycle of the moving object. By altering the rotational speed of an x-ray source as a function of the object cycle, segments of projection data are collected for each selected phase of the object during each rotation. After completing a plurality of rotations, the segments of projection data are combined and a cross-sectional image of the selected phase of the object is generated. As a result, minimizing motion artifacts.

摘要翻译： 本发明的一种形式是用于产生整个对象的图像的成像系统。 在一个实施例中，使用生理循环单元来确定移动物体的周期。 通过改变作为对象周期的函数的x射线源的旋转速度，在每个旋转期间针对对象的每个选定阶段收集投影数据的段。 在完成多个旋转之后，组合投影数据的段，并且生成对象的选定阶段的横截面图像。 结果，最小化运动伪像。

公开(公告)号：US5864598A

公开(公告)日：1999-01-26

申请号：US837545

申请日：1997-04-21

申请人： Jiang Hsieh ,  Stanley H. Fox

发明人： Jiang Hsieh ,  Stanley H. Fox

IPC分类号： A61B6/03 ,  H04N5/32

CPC分类号： H04N5/32 ,  A61B6/027 ,  Y10S378/901

摘要： The present invention, in one form, is a system for generating a high resolution image of an object from projection data acquired during a computed tomography scan. The system includes a gantry having an x-ray source which rotates around the object. The x-ray source emits an x-ray beam which is collimated with a collimator having a collimator aperture to define an x-ray beam width, or slice thickness. The projection data is reconstructed to generate image data for adjacent image slices. A deconvolution algorithm is applied to the image data to generate a deconvolved image having a finer, i.e., smaller, resolution than the collimator aperture.

摘要翻译： 在一种形式中，本发明是一种用于在计算机断层摄影扫描期间从投影数据生成物体的高分辨率图像的系统。 该系统包括具有围绕物体旋转的x射线源的台架。 X射线源发射X射线束，该X射线束用具有准直器孔径的准直仪准直，以限定X射线束宽度或切片厚度。 重建投影数据以生成相邻图像切片的图像数据。 将去卷积算法应用于图像数据以产生具有比准直器孔径更精细，即更小的分辨率的解卷积图像。

公开(公告)号：US06366638B1

公开(公告)日：2002-04-02

申请号：US09810922

申请日：2001-03-16

申请人： Jiang Hsieh ,  Stanley H. Fox

发明人： Jiang Hsieh ,  Stanley H. Fox

IPC分类号： A61B603

CPC分类号： A61B6/488 ,  A61B6/032 ,  G06T11/005 ,  Y10S378/901

摘要： Methods and Apparatus for reducing image artifacts when reconstructing an image with a multislice computed tomographic (CT) imaging scanner are provided. Scout images are generated by obtaining a plurality of projection views of an object, modifying the projection data utilizing a deconvolution kernel, generating a horizontal gradient and a vertical gradient based on the modified projection data, applying helical weights to the horizontal gradient and vertical gradient, and applying a desired level of enhancement to the weighted horizontal and vertical gradients.

摘要翻译： 提供了使用多层计算机断层摄影（CT）成像扫描仪重建图像时减少图像伪影的方法和装置。 通过获得对象的多个投影视图，利用去卷积内核修改投影数据，基于经修改的投影数据生成水平梯度和垂直梯度来生成Scout图像，对水平梯度和垂直梯度应用螺旋权重， 并且对加权的水平和垂直梯度应用期望的增强水平。

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。

公开(公告)号：US06418183B1

公开(公告)日：2002-07-09

申请号：US09749821

申请日：2000-12-28

申请人： Stanley H. Fox ,  Jiang Hsieh

发明人： Stanley H. Fox ,  Jiang Hsieh

IPC分类号： A61B603

CPC分类号： A61B6/5235 ,  A61B6/032 ,  A61B6/488 ,  A61B6/5264 ,  G06F19/00 ,  Y10S378/901

摘要： One aspect of the present invention is a method for imaging a volume of a patient with a computed tomographic (CT) imaging system. The method includes steps of: scanning a volume of a patient with a first, full field of view (FOV) scan to acquire first projection data; scanning a smaller volume of the patient with a second, restricted FOV scan to acquire second projection data; estimating an amount of shift between the first projection data and the second projection data resulting from patient movement; and blending first projection data with second projection data in accordance with the estimated amount of shift to estimate projections of the second scan.

摘要翻译： 本发明的一个方面是用计算机断层摄影（CT）成像系统对患者体积进行成像的方法。 该方法包括以下步骤：用第一全视野（FOV）扫描扫描患者体积以获取第一投影数据; 用第二限制FOV扫描扫描较小体积的患者以获得第二投影数据; 估计由患者移动导致的第一投影数据和第二投影数据之间的偏移量; 以及根据所估计的偏移量将第一投影数据与第二投影数据进行混合以估计第二扫描的投影。

公开(公告)号：US06408043B1

公开(公告)日：2002-06-18

申请号：US09473247

申请日：1999-12-27

申请人： Hui Hu ,  Jiang Hsieh ,  Stanley H. Fox ,  Kishore C. Acharya ,  Hui David He ,  Yi Sun

发明人： Hui Hu ,  Jiang Hsieh ,  Stanley H. Fox ,  Kishore C. Acharya ,  Hui David He ,  Yi Sun

IPC分类号： A61B600

CPC分类号： A61B6/541 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： A method for generating an image of an object using a computed tomography (CT) imaging system, which includes at least one x-ray detector array and at least one rotating x-ray source projecting an x-ray beam, includes the steps of identifying a physiological cycle of the object (the cycle comprising a plurality of phases); selecting at least one phase of the object; collecting at least one segment of projection data for each selected phase of the object during each rotation of each x-ray source; generating a projection data set by combining the projection data segments; generating a cross-sectional image of the entire object from the projection data set; and communicating the image or data associated with the image to a remote facility. The remote facility provides remote services over a network.

摘要翻译： 一种使用计算机断层摄影（CT）成像系统产生物体的图像的方法，该系统包括至少一个X射线检测器阵列和投射X射线束的至少一个旋转x射线源，包括识别 物体的生理周期（包括多个相的周期）; 选择对象的至少一个阶段; 在每个x射线源的每次旋转期间收集对象的每个所选相位的至少一个投影数据段; 通过组合所述投影数据段来生成投影数据集; 从所述投影数据集生成整个对象的横截面图像; 并将与图像相关联的图像或数据传送到远程设施。 远程设备通过网络提供远程服务。

公开(公告)号：US6101234A

公开(公告)日：2000-08-08

申请号：US978803

申请日：1997-11-26

申请人： Fazle Ali ,  Jiang Hsieh ,  Girish Saligram ,  Shawn P. Faessler ,  Christopher J. Mussack ,  David M. Deaven ,  Stanley H. Fox ,  Alexsandar Zavaljevski

发明人： Fazle Ali ,  Jiang Hsieh ,  Girish Saligram ,  Shawn P. Faessler ,  Christopher J. Mussack ,  David M. Deaven ,  Stanley H. Fox ,  Alexsandar Zavaljevski

IPC分类号： A61B6/03 ,  G01N23/04 ,  G06F19/00 ,  G06T1/00 ,  H04N7/18

CPC分类号： G01N23/046 ,  A61B6/548 ,  G06F19/321 ,  G06F19/3418 ,  A61B6/027 ,  G01N2223/419 ,  G06F19/3406 ,  Y10S378/901

摘要： A CT Fluoro System display which includes apparatus and methods for facilitating effective performance of an interventional procedure. The apparatus and methods are generally referred to herein as partial image display, dynamic image reformation, in-room control, flat panel display, in-room display, and magnification. More particularly, an important performance parameter for a CT Fluoro System is the time to first image. Accordingly, and to reduce the time to first image, a partially reconstructed image can be displayed. In addition to fast image reconstruction, it sometimes is necessary to examine a needle position from different orientations, i.e., views. Accordingly, the present display provides dynamic image reformation wherein axial images are displayed at a very high rate and the operator may reformat the axial images and display the reformatted images in real time. Further, and to provide additional functionality and convenience for an operator, an in-room, or convenient, control including a "reverse and forward" play command button, "save" (or capture), "grid display", and "preset window/levels" functions is provided. By enabling an operator to perform these functions with the remote unit, the system is believed to be easier to use and useful information to the operator in an easily understandable format. Also, and to provide improved display, a flat panel display may be utilized. A user interface for use with the display includes a CT/i Interventional control, three message areas (hierarchical and designated as message area #1, message area #2, and message area #3), and an image control. Also, image magnification can be performed.

摘要翻译： CT氟系统显示器，其包括用于促进介入过程的有效执行的装置和方法。 该装置和方法通常在此被称为部分图像显示，动态图像重建，室内控制，平板显示，室内显示和放大。 更具体地说，CT氟系统的重要性能参数是首次成像的时间。 因此，为了减少第一图像的时间，可以显示部分重建的图像。 除了快速图像重建之外，有时需要从不同的取向，即视图检查针位置。 因此，本显示器提供动态图像重建，其中以非常高的速率显示轴向图像，并且操作者可以重新格式化轴向图像并且实时显示重新格式化的图像。 此外，为了为操作者提供额外的功能和便利性，包括“反向和向前”播放命令按钮的“保存”（或捕获），“网格显示”和“预设窗口 / levels“功能。 通过使操作员能够使用远程单元执行这些功能，系统被认为更容易使用，并且以易于理解的格式向操作员提供有用的信息。 另外，为了提供改进的显示，可以使用平板显示器。 与显示器一起使用的用户界面包括CT / i介入控制，三个消息区域（分级并指定为消息区域＃1，消息区域＃2和消息区域＃3）和图像控制。 此外，可以执行图像放大。

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。

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。