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1.发明授权Methods, apparatus, and computer readable mediums for performing perfusion studies 有权用于进行灌注研究的方法，装置和计算机可读介质公开(公告)号：US06934353B2
公开(公告)日：2005-08-23
申请号：US10676215
申请日：2003-10-01
申请人： Ge Wang , Jiang Hsieh , Yuchuan Wei
发明人： Ge Wang , Jiang Hsieh , Yuchuan Wei
CPC分类号： A61B6/032 , A61B6/027 , A61B6/481 , A61B6/507 , G01N23/046 , G01N2223/419 , Y10S378/901
摘要： A method for conducting a perfusion study includes performing an initial full scan of an area of interest in an object, and performing at least one subsequent partial scan of the area of interest to detect motion of a contrast agent.
摘要翻译： 用于进行灌注研究的方法包括执行对象中感兴趣区域的初始全扫描，以及执行感兴趣区域的至少一个后续部分扫描以检测造影剂的运动。
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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。
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3.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。
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公开(公告)号：US20050074084A1
公开(公告)日：2005-04-07
申请号：US10676215
申请日：2003-10-01
申请人： Ge Wang , Jiang Hsieh , Yuchuan Wei
发明人： Ge Wang , Jiang Hsieh , Yuchuan Wei
CPC分类号： A61B6/032 , A61B6/027 , A61B6/481 , A61B6/507 , G01N23/046 , G01N2223/419 , Y10S378/901
摘要： A method for conducting a perfusion study includes performing an initial full scan of an area of interest in an object, and performing at least one subsequent partial scan of the area of interest to detect motion of a contrast agent.
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公开(公告)号：US06850585B2
公开(公告)日：2005-02-01
申请号：US10382154
申请日：2003-03-05
申请人： Jiang Hsieh , Ge Wang
发明人： Jiang Hsieh , Ge Wang
CPC分类号： A61B6/481 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/504 , G06T11/006 , G06T2211/424 , Y10S378/901
摘要： In overlapping reconstruction for multi-slide spiral CT, adjacent slices of an object typically only have small differences. Based on this property, a progressive updating approach for volumetric ct image reconstruction includes a method and apparatus to use the well-known ordered subset expectation maximization (OSEM) formula or other iterative algorithms for spiral CT overlapping reconstruction. The imaging geometry is assumed to be single-slice helical/spiral scanning. To start with, a complete set of projections is synthesized via linear interpolation of data associated with opposite rays for reconstruction of the first slice. Then, new data are incrementally utilized for reconstruction of subsequent slices by updating the previous slice using the OSEM approach. To overcome accumulative errors, traditional reconstruction from a complete set of projections is performed when it is necessary as is determined by dynamically monitoring the relevant errors.
摘要翻译： 在多片螺旋CT的重叠重建中，对象的相邻切片通常仅具有小的差异。 基于这一特性，用于体积ct图像重建的逐步更新方法包括使用公知的有序子集期望最大化（OSEM）公式或用于螺旋CT重叠重建的其他迭代算法的方法和装置。 假设成像几何是单层螺旋/螺旋扫描。 首先，通过与用于重构第一切片的相反射线相关联的数据的线性插值来合成一整套投影。 然后，通过使用OSEM方法更新先前的切片，新的数据被递增地用于后续切片的重构。 为了克服累积的错误，通过动态监测相关错误确定必要时，可以通过一套完整的预测来进行传统的重建。
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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
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。
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7.发明授权公开(公告)号：US08588494B2
公开(公告)日：2013-11-19
申请号：US12915195
申请日：2010-10-29
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。
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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
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。
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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
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。
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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。
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