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81. 发明授权

US5732118A Methods and apparatus for image reconstruction in a multislice computed tomography system 失效
标题翻译：多层计算机断层摄影系统中图像重建的方法和装置
公开(公告)号：US5732118A
公开(公告)日：1998-03-24
申请号：US755892
申请日：1996-12-02
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B6/03
CPC分类号： G01T1/17 , A61B6/5205 , G01T1/1647 , A61B6/032 , A61B6/4085 , Y10S378/901
摘要： The present invention, in one form, is a system for obtaining data measurement signals for producing a tomographic image of an object in a multislice scan. More specifically, detector cells in at least one channel of a detector array are electrically coupled, or ganged, so that the ganged channel provides one data measurement signal to be transmitted through the gantry slip ring. The signal distribution in the z-direction for the ganged channel is then determined using signals obtained by adjacent non-ganged detector cells.
摘要翻译：本发明在一种形式中是用于获得用于产生多层扫描中的物体的断层图像的数据测量信号的系统。更具体地，检测器阵列的至少一个通道中的检测器单元电耦合或组合，使得联动通道提供一个通过台架滑环传输的数据测量信号。然后使用由相邻非联合检测器单元获得的信号来确定用于联合通道的z方向上的信号分布。

82. 发明授权

US5727041A Methods and apparatus for reducing partial volume image artifacts 失效
标题翻译：减少部分体积图像伪影的方法和装置
公开(公告)号：US5727041A
公开(公告)日：1998-03-10
申请号：US747639
申请日：1996-11-13
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B6/03 , G06T1/00
CPC分类号： A61B6/032 , Y10S378/901
摘要： The present invention, in one form, is a method for improving image quality in Computed Tomography systems by using a partial volume artifact estimation algorithm. In accordance with one embodiment of the algorithm, an object of interest is scanned to generate image data. The image data is segmented into low attenuation data and high attenuation data. A gradient image is generated for two adjacent slices of the image data. The gradient image is then forward projected and squared. The squared gradient image is an estimation of partial volume artifacts in the image data, and therefore is removed from the image data.
摘要翻译：本发明以一种形式，是通过使用部分体积假象估计算法来提高计算机断层成像系统中的图像质量的方法。根据算法的一个实施例，扫描感兴趣的对象以生成图像数据。图像数据被分割成低衰减数据和高衰减数据。为图像数据的两个相邻切片生成渐变图像。然后梯度图像向前投影和平方。平方梯度图像是对图像数据中的部分体积伪像的估计，因此从图像数据中去除。

83. 发明授权

US5550889A Alignment of an x-ray tube focal spot using a deflection coil 失效
标题翻译：使用偏转线圈对x射线管焦点进行对准
公开(公告)号：US5550889A
公开(公告)日：1996-08-27
申请号：US345082
申请日：1994-11-28
申请人： Michael F. Gard , Stephen W. Gravelle , Jiang Hsieh , Quan N. Lu , John W. Newman , Thomas L. Toth , Michael A. Wu
发明人： Michael F. Gard , Stephen W. Gravelle , Jiang Hsieh , Quan N. Lu , John W. Newman , Thomas L. Toth , Michael A. Wu
IPC分类号： H01J35/14 , H01J35/26 , H01J35/30 , H05G1/26 , H05G1/52
CPC分类号： H05G1/52 , H01J35/14 , H01J35/26 , H01J35/30 , H05G1/26
摘要： Precise alignment of the focal spot position on an x-ray CT system is achieved using a deflection coil that produces a magnetic field which acts on the electron beam path in the x-ray tube. A variable current power supply drives the deflection coil and is controlled by input signals to align the focal spot at a static reference position, to correct for focal spot drift between scans, and to wobble the focal spot position during a scan or between scans.
摘要翻译：使用偏转线圈实现x射线CT系统上的焦点位置的精确对准，该偏转线圈产生作用在x射线管中的电子束路径上的磁场。可变电流电源驱动偏转线圈并由输入信号控制，以将焦点对准静态参考位置，以校正扫描之间的焦斑漂移，并在扫描期间或扫描之间摆动焦点位置。

84. 发明授权

US5416815A Adaptive filter for reducing streaking artifacts in x-ray tomographic images 失效
标题翻译：自适应滤波器，用于减少X射线断层图像中的条纹伪像
公开(公告)号：US5416815A
公开(公告)日：1995-05-16
申请号：US87568
申请日：1993-07-02
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B6/03 , G01N23/04 , G01N23/083
CPC分类号： G01N23/046 , G01N2223/419 , Y10S378/901
摘要： Streaking artifacts in a computed tomography x-ray image are reduced by adaptively filtering each set of projection data. The adaptive filter produces an error vector (.theta.) by low-pass filtering the projection data (P) and subtracting the error vector (.theta.) from the projection data (P) prior to image reconstruction. A window function generator controls the low-pass filter as a function of x-ray detector readings.
摘要翻译：通过对每组投影数据进行自适应滤波，减少计算机断层摄影X射线图像中的伪像。自适应滤波器通过对投影数据（P）进行低通滤波并在图像重建之前从投影数据（P）中减去误差向量（θ）来产生误差向量（θ）。窗口函数发生器控制低通滤波器作为x射线探测器读数的函数。

85. 发明授权

US09020230B2 Method and apparatus for iterative reconstruction 有权
标题翻译：迭代重建的方法和装置
公开(公告)号：US09020230B2
公开(公告)日：2015-04-28
申请号：US13287589
申请日：2011-11-02
申请人： Zhou Yu , Evgeny Drapkin , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Kai Zeng , Jiang Hsieh , Brian Edward Nett , Debashish Pal , Lin Fu , Guangzhi Cao , Charles A. Bouman, Jr. , Ken David Sauer
发明人： Zhou Yu , Evgeny Drapkin , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Kai Zeng , Jiang Hsieh , Brian Edward Nett , Debashish Pal , Lin Fu , Guangzhi Cao , Charles A. Bouman, Jr. , Ken David Sauer
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/424 , G06T2211/428
摘要： A method for reconstructing an image of an object that includes a plurality of image elements. The method includes accessing image data associated with a plurality of image elements, and reconstructing an image of the object by optimizing an objective function, where the objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. The algorithm is composed of nested iterative loops, in which an inner loop iteratively optimizes an objective function approximating the outer loop objective function, and an outer loop that utilizes the solution of the inner loop to optimize the original objective function.
摘要翻译：一种用于重构包括多个图像元素的对象的图像的方法。该方法包括访问与多个图像元素相关联的图像数据，以及通过优化目标函数来重构对象的图像，其中通过迭代地求解近似优化问题的嵌套序列来优化目标函数。该算法由嵌套迭代循环组成，其中内循环迭代地优化近似外循环目标函数的目标函数，以及利用内循环的解来优化原始目标函数的外循环。

86. 发明授权

US09001960B2 Method and apparatus for reducing noise-related imaging artifacts 有权
标题翻译：用于减少噪声相关成像伪影的方法和装置
公开(公告)号：US09001960B2
公开(公告)日：2015-04-07
申请号：US13343069
申请日：2012-01-04
申请人： Brian Edward Nett , Bruno De Man , Jiang Hsieh , Jed Douglas Pack , Zhou Yu , Guangzhi Cao
发明人： Brian Edward Nett , Bruno De Man , Jiang Hsieh , Jed Douglas Pack , Zhou Yu , Guangzhi Cao
IPC分类号： A61B6/03 , A61B6/00 , G06T5/00 , G06T5/50 , G06T11/00
CPC分类号： G06T5/001 , A61B6/507 , G06T5/50 , G06T11/006 , G06T11/008 , G06T2207/10072 , G06T2207/20182 , G06T2211/412
摘要： A method for reconstructing an image of an object includes acquiring a set of measured projection data, reconstructing the measured projection data using a first algorithm to generate a first reconstructed image dataset, reconstructing the measured projection data using a second algorithm to generate a second reconstructed image dataset, the second algorithm being utilized to improve the temporal resolution of the second reconstructed image dataset, and generating a final image dataset using both the first and second image datasets.
摘要翻译：一种用于重构对象的图像的方法包括获取一组测量的投影数据，使用第一算法重建所测量的投影数据以生成第一重建图像数据集，使用第二算法重建所测量的投影数据以生成第二重建图像数据集，所述第二算法用于改善所述第二重建图像数据集的时间分辨率，以及使用所述第一和第二图像数据集生成最终图像数据集。

87. 发明授权

US08971605B2 System and method for correcting for metal artifacts using multi-energy computed tomography 有权
标题翻译：使用多能计算机断层扫描法校正金属伪像的系统和方法
公开(公告)号：US08971605B2
公开(公告)日：2015-03-03
申请号：US13593348
申请日：2012-08-23
申请人： Jiang Hsieh , Brian Edward Nett , Paavana Sainath , Debashish Pal
发明人： Jiang Hsieh , Brian Edward Nett , Paavana Sainath , Debashish Pal
IPC分类号： G06K9/00 , A61B6/00
CPC分类号： G06T5/005 , A61B6/032 , A61B6/405 , A61B6/482 , A61B6/488 , A61B6/5205 , A61B6/5258 , G06T7/0012 , G06T11/005 , G06T2211/408
摘要： A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image.
摘要翻译：提供了一种方法。该方法包括以第二能量谱获取第一能量谱的第一数据集和第二数据集。该方法还包括使用第一数据集和第二数据集提取金属伪像校正信号，或者使用分别从第一和第二数据集生成的第一重建图像和第二重建图像。该方法还包括使用金属伪像校正信号在第一重构图像上执行金属伪像校正，以产生第一校正图像。

88. 发明授权

US08548568B2 Methods and apparatus for motion compensation 有权
标题翻译：运动补偿方法和装置
公开(公告)号：US08548568B2
公开(公告)日：2013-10-01
申请号：US11517964
申请日：2006-09-08
申请人： Jiang Hsieh
发明人： Jiang Hsieh
IPC分类号： A61B5/05
CPC分类号： G06T11/005 , A61B6/503 , A61B6/5247 , A61B6/5264 , A61B8/0883 , A61B8/5276 , G06T2211/412
摘要： A method includes fitting a motion map from a first imaging modality with a first FOV to a second imaging modality different from the first with a second FOV sized differently than the first FOV.
摘要翻译：一种方法包括将来自具有第一FOV的第一成像模态的运动图拟合成与第一成像模态不同于具有不同于第一FOV的第二FOV的第一成像模态。

89. 发明申请

US20130108128A1 METHOD AND APPARATUS FOR ITERATIVE RECONSTRUCTION 有权
标题翻译：用于迭代重建的方法和装置
公开(公告)号：US20130108128A1
公开(公告)日：2013-05-02
申请号：US13287589
申请日：2011-11-02
申请人： Zhou Yu , Evgeny Drapkin , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Kai Zeng , Jiang Hsieh , Brian Edward Nett , Debashish Pal , Lin Fu , Guangzhi Cao , Charles A. Bouman, JR. , Ken David Sauer
发明人： Zhou Yu , Evgeny Drapkin , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Kai Zeng , Jiang Hsieh , Brian Edward Nett , Debashish Pal , Lin Fu , Guangzhi Cao , Charles A. Bouman, JR. , Ken David Sauer
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424 , G06T2211/428
摘要： A method for reconstructing an image of an object that includes a plurality of image elements. The method includes accessing image data associated with a plurality of image elements, and reconstructing an image of the object by optimizing an objective function, where the objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. The algorithm is composed of nested iterative loops, in which an inner loop iteratively optimizes an objective function approximating the outer loop objective function, and an outer loop that utilizes the solution of the inner loop to optimize the original objective function.
摘要翻译：一种用于重构包括多个图像元素的对象的图像的方法。该方法包括访问与多个图像元素相关联的图像数据，以及通过优化目标函数来重构对象的图像，其中通过迭代地求解近似优化问题的嵌套序列来优化目标函数。该算法由嵌套迭代循环组成，其中内循环迭代地优化近似外循环目标函数的目标函数，以及利用内循环的解来优化原始目标函数的外循环。

90. 发明授权

US08363779B2 System and method of acquiring multi-energy CT imaging data 有权
标题翻译：获取多能CT成像数据的系统和方法
公开(公告)号：US08363779B2
公开(公告)日：2013-01-29
申请号：US13484707
申请日：2012-05-31
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 , H05G1/64 , G06K9/00
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. The controller is configured to apply a first kVp for a first time period, apply a second kVp for a second time period, integrate two or more view datasets during the first time period, integrate one or more view datasets during the second time period, and generate an image using the datasets integrated during the first time period and during the second time period.
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和控制器。控制器被配置为在第一时间段内施加第一kVp，在第二时间段施加第二kVp，在第一时间段期间集成两个或更多个视图数据集，在第二时间段期间集成一个或多个视图数据集;以及使用在第一时间段期间和第二时间段期间集成的数据集生成图像。

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