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公开(公告)号：US20060020200A1
公开(公告)日：2006-01-26
申请号：US10887489
申请日：2004-07-08
IPC分类号： A61B5/05
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4085 , A61B6/481 , A61B6/504 , G06T11/005 , G06T2211/404
摘要： A helical scan is performed with a fan beam or cone beam CT system to acquire a first set of sinogram data sets. The subject is injected with a contrast agent and the identical helical scan is performed to acquire a second set of sinogram data sets. Corresponding projection views are subtracted in the two data sets and a number of different images are reconstructed from the difference data set. One image is a tomographic image produced using a filtered backprojection method and a second image is a topograph produced by selecting and displaying projection views acquired at the same view angle in successive sinogram data sets.
摘要翻译： 用扇形束或锥形束CT系统执行螺旋扫描以获取第一组正弦图数据集。 对象被注入造影剂，并执行相同的螺旋扫描以获取第二组正弦图数据集。 在两个数据集中减去对应的投影视图，并从差异数据集中重建多个不同的图像。 一个图像是使用滤波反投影方法产生的断层图像，并且第二图像是通过在连续的正弦图数据集中选择和显示以相同视角采集的投影视图而产生的地形图。
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公开(公告)号：US20050100126A1
公开(公告)日：2005-05-12
申请号：US10827489
申请日：2004-04-19
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4028 , A61B6/4085 , A61B6/4291 , A61B6/541
摘要： A CT imaging system includes a two-dimensional detector array and an x-ray source that both revolve around the subject during a scan. The x-ray source produces a cone beam of x-rays and the focal point of this cone beam is electrically moved to different locations along the z-axis to increase the z-axis extent of the ROI that can be imaged without patient table movement. Different focal point scan patterns are described for a variety of different clinical applications.
摘要翻译： CT成像系统包括在扫描期间围绕被摄体旋转的二维检测器阵列和x射线源。 x射线源产生一个x射线的锥形束，并且该锥形束的焦点沿着z轴电动移动到不同的位置，以增加可以在没有患者台移动的情况下成像的ROI的z轴范围 。 针对各种不同的临床应用描述了不同的焦点扫描模式。
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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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4.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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8.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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9.发明申请公开(公告)号：US20120314928A1
公开(公告)日：2012-12-13
申请号：US13593156
申请日：2012-08-23
申请人： Jiang Hsieh , Roy-Arnulf Helge Nilsen , Peter Michael Edic , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Baojun Li , John Lawrence Seamans
发明人： Jiang Hsieh , Roy-Arnulf Helge Nilsen , Peter Michael Edic , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Baojun Li , John Lawrence Seamans
IPC分类号： G06K9/46
CPC分类号： A61B6/032 , A61B6/482 , A61B6/503 , G06T11/006 , G06T2211/412 , G06T2211/424
摘要： A system, method, and apparatus includes a computed tomography (CT) system having a rotatable gantry, an x-ray source, a generator, a detector having pixels and positioned to receive x-rays, and a computer. The computer is programmed to acquire CT data representative of an object, determine a first subset of the CT data, determine a second subset of the CT data, and determine a difference between the first and second subsets of the CT data to identify a motion region in the object. The computer is also programmed to update image data reconstructed from a first portion of the first subset of the CT data and corresponding to the region and reconstruct an image based on the updated image data and non-updated image data. The non-updated image data is reconstructed from a second portion the first subset of the CT data.
摘要翻译： 系统，方法和装置包括具有可旋转机架，X射线源，发生器，具有像素并被定位成接收x射线的检测器的计算机断层摄影（CT）系统和计算机。 计算机被编程为获取表示对象的CT数据，确定CT数据的第一子集，确定CT数据的第二子集，并且确定CT数据的第一和第二子集之间的差异，以识别运动区域 在对象中。 计算机还被编程为更新从CT数据的第一子集的第一部分重建并对应于该区域的图像数据，并且基于更新的图像数据和未更新的图像数据重建图像。 从CT数据的第一子集的第二部分重构未更新的图像数据。
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10.发明授权Methods and systems for improving spatial and temporal resolution of computed images of moving objects 有权改善移动物体计算图像空间和时间分辨率的方法和系统公开(公告)号：US08233682B2
公开(公告)日：2012-07-31
申请号：US11758166
申请日：2007-06-05
申请人： Jeffrey Allen Fessler , Charles Addison Bouman , Jiang Hsieh , Jean-Baptiste Daniel Marie Thibault , Ken David Sauer , Samit Kumar Basu , Bruno Kristiaan Bernard De Man
发明人： Jeffrey Allen Fessler , Charles Addison Bouman , Jiang Hsieh , Jean-Baptiste Daniel Marie Thibault , Ken David Sauer , Samit Kumar Basu , Bruno Kristiaan Bernard De Man
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/037 , G06T11/006 , G06T2211/412 , G06T2211/424
摘要： A method of improving a resolution of an image using image reconstruction is provided. The method includes acquiring scan data of an object and forward projecting a current image estimate of the scan data to generate calculated projection data. The method also includes applying a data-fit term and a regularization term to the scan data and the calculated projection data and modifying at least one of the data fit term and the regularization term to accommodate spatio-temporal information to form a reconstructed image from the scan data and the calculated projection data.
摘要翻译： 提供了一种使用图像重建来提高图像分辨率的方法。 该方法包括获取对象的扫描数据并向前投影扫描数据的当前图像估计以产生计算出的投影数据。 该方法还包括将数据拟合项和正则化项应用于扫描数据和计算出的投影数据，并修改数据拟合项和正则化项中的至少一个，以适应时空信息，以形成来自 扫描数据和计算出的投影数据。
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