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公开(公告)号：US20130004050A1
公开(公告)日：2013-01-03
申请号：US13174480
申请日：2011-06-30
申请人： Xiaoye Wu , Jiang Hsieh , Paavana Sainath , Xin Liu
发明人： Xiaoye Wu , Jiang Hsieh , Paavana Sainath , Xin Liu
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4085 , A61B6/4291 , A61B6/483 , A61B6/5205 , A61B6/5282
摘要： Approaches for deriving scatter information using inverse tracking of scattered X-rays is disclosed. In certain embodiments scattered rays are tracked from respective locations on a detector to a source of the X-ray radiation, as opposed to tracking schemes that proceed from the source to the detector. In one such approach, the inverse tracking is implemented using a density integrated volume that reduces the integration steps performed.
摘要翻译： 公开了使用散射X射线的反向跟踪导出散射信息的方法。 在某些实施例中，与从源到检测器进行的跟踪方案相反，散射光线从检测器上的相应位置跟踪到X射线辐射源。 在一种这样的方法中，使用密度集成体积来实现逆追踪，其减少执行的集成步骤。
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12.发明申请APPARATUS FOR SCATTER REDUCTION FOR CT IMAGING AND METHOD OF FABRICATING SAME 有权用于减少CT成像的扫描仪的装置及其制造方法公开(公告)号：US20130034200A1
公开(公告)日：2013-02-07
申请号：US13198283
申请日：2011-08-04
CPC分类号： G21K1/02 , A61B6/03 , A61B6/032 , A61B6/4014 , A61B6/4291 , A61B6/482 , A61B6/583 , A61N5/10 , G02B27/10 , G02B27/30 , G21K1/025 , G21K1/04 , H01L27/14625 , H01L27/14818 , Y10T29/49826
摘要： A collimator for an imaging system includes a first region comprising a first one-dimensional array of apertures along a channel direction, and a second region comprising a second one-dimensional array of apertures along the channel direction, wherein an aspect ratio of the apertures of the first region is greater than an aspect ratio of the second region.
摘要翻译： 用于成像系统的准直器包括第一区域，其包括沿通道方向的孔的第一一维阵列，以及包括沿着通道方向的孔的第二一维阵列的第二区域，其中孔的纵横比 第一区域大于第二区域的纵横比。
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13.发明授权公开(公告)号：US08831180B2
公开(公告)日：2014-09-09
申请号：US13198283
申请日：2011-08-04
CPC分类号： G21K1/02 , A61B6/03 , A61B6/032 , A61B6/4014 , A61B6/4291 , A61B6/482 , A61B6/583 , A61N5/10 , G02B27/10 , G02B27/30 , G21K1/025 , G21K1/04 , H01L27/14625 , H01L27/14818 , Y10T29/49826
摘要： A collimator for an imaging system includes a first region comprising a first one-dimensional array of apertures along a channel direction, and a second region comprising a second one-dimensional array of apertures along the channel direction, wherein an aspect ratio of the apertures of the first region is greater than an aspect ratio of the second region.
摘要翻译： 用于成像系统的准直器包括第一区域，其包括沿通道方向的孔的第一一维阵列，以及包括沿着通道方向的孔的第二一维阵列的第二区域，其中孔的纵横比 第一区域大于第二区域的纵横比。
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公开(公告)号：US06977984B2
公开(公告)日：2005-12-20
申请号：US10680688
申请日：2003-10-07
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。
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15.发明授权公开(公告)号：US07142636B2
公开(公告)日：2006-11-28
申请号：US10668444
申请日：2003-09-23
IPC分类号： G01B15/02
CPC分类号： H04N5/3675 , A61B6/032 , A61B6/585 , A61B6/586 , H04N5/32
摘要： A method and system for an improved data acquisition system with an image detector array and an image processing system which finds a malfunctioning cell, interpolates a signal for the malfunctioning cell using neighboring channels of the cell, and corrects the interpolation with an error rate found in performing interpolations on neighboring rows with cells which are not malfunctioning. The image processing system may include a DAS and a reconstruction system. The step of finding a malfunctioning cell may be accomplished through a variety of methods, such as measuring discrepancies between a cell's and its neighboring cell's average readings over time and exposing the cells to x-rays which should produce similar readings in all the cells and comparing the cells' signals, looking for discrepancies. The step of interpolating and the step of correcting may take into consideration cells within the same projection view as the malfunctioning cell.
摘要翻译： 一种用于具有图像检测器阵列和图像处理系统的改进的数据采集系统的方法和系统，其发现故障小区，使用所述小区的相邻信道内插用于所述故障小区的信号，并以所述小区的相邻信道校正所述插值 在没有故障的单元对相邻行执行内插。 图像处理系统可以包括DAS和重建系统。 找到故障细胞的步骤可以通过各种方法来实现，例如测量细胞及其相邻细胞的平均读数随时间的差异，并将细胞暴露于在所有细胞中产生相似读数的x射线，并比较 细胞信号，寻找差异。 内插步骤和校正步骤可以考虑到与故障单元相同的投影视图中的单元。
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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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17.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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