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11.发明授权公开(公告)号：US09498179B1
公开(公告)日：2016-11-22
申请号：US14706759
申请日：2015-05-07
Applicant: General Electric Company
Inventor： Kriti Sen Sharma , Hewei Gao , Debashish Pal
CPC classification number: A61B6/5258 , A61B6/032 , A61B6/461 , A61B6/482 , G06T11/005 , G06T11/008 , G06T2207/10081 , G06T2211/408
Abstract: Various methods and systems for spectral computed tomography imaging are provided. In one embodiment, a method comprises acquiring a first projection dataset and a second projection dataset, detecting a location of metal in the first projection dataset, applying corrections to the first and second projection datasets based on the location of the metal, and displaying an image reconstructed from the corrected first and second projection datasets. In this way, metal artifacts may be substantially reduced in dual or multi-energy CT imaging.
Abstract translation: 提供了用于光谱计算机断层摄影成像的各种方法和系统。 在一个实施例中，一种方法包括获取第一投影数据集和第二投影数据集，检测第一投影数据集中的金属位置，基于金属的位置对第一和第二投影数据集进行校正，以及显示图像 从校正的第一和第二投影数据集重建。 以这种方式，在双重或多能CT成像中，金属伪影可能会显着降低。
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12.发明申请METHODS AND SYSTEMS FOR CONTRAST ENHANCED IMAGING WITH SINGLE ENERGY ACQUISITION 有权单向能量采集对比度增强成像的方法与系统公开(公告)号：US20160189402A1
公开(公告)日：2016-06-30
申请号：US14586663
申请日：2014-12-30
Applicant: General Electric Company
Inventor： Brian Edward Nett , Hewei Gao , Paavana Sainath
CPC classification number: G06T11/008 , A61B6/481 , A61B6/482 , A61B6/5205 , A61B6/5211 , A61B6/5217 , A61B6/5258 , A61B6/585 , G06T11/006 , G06T2211/421 , G06T2211/424
Abstract: Methods and systems are provided for boosting the contrast levels in an image reconstructed from projection data acquired at a single energy. In one embodiment, a method comprises modifying projection data corresponding to a material based on an absorption behavior of the material at a selected energy, wherein the projection data is acquired at an energy higher than the selected energy. In this way, contrast levels may be enhanced in an image reconstructed from projection data acquired at a typical single energy as though the image were reconstructed from projection data acquired at a lower energy.
Abstract translation: 提供的方法和系统用于增强从在单个能量获取的投影数据重建的图像中的对比度水平。 在一个实施例中，一种方法包括基于在所选择的能量下的材料的吸收行为来修改对应于材料的投影数据，其中以比所选择的能量高的能量获取投影数据。 以这种方式，可以在从以典型的单一能量获取的投影数据重建的图像中增强对比度水平，好像从以较低能量获取的投影数据重建图像。
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公开(公告)号：US20160012615A1
公开(公告)日：2016-01-14
申请号：US14330198
申请日：2014-07-14
Applicant: General Electric Company
Inventor： Hewei Gao , Adam Cohen , Brian Edward Nett , Paavana Sainath , Yasuhiro Imai
CPC classification number: G06T11/005 , A61B6/032 , A61B6/5205 , G06T2211/416
Abstract: A method is provided including acquiring imaging data of an object to be imaged from a computed tomography (CT) detector. The method also includes reconstructing the acquired imaging data into an initial reconstruction image, and performing material characterization of an image volume of the initial reconstruction image to provide a re-mapped image volume. Further, the method includes performing forward projection on the re-mapped image volume to provide forward projection data, and providing an error projection based on the forward projection data. Also, the method includes filtering at least one of the initial reconstruction image, the re-mapped image volume, the forward projection data, or the error projection. The method also includes using the error projection to update the initial reconstruction image to provide an updated reconstruction image.
Abstract translation: 提供一种方法，包括从计算机断层摄影（CT）检测器获取要被成像的对象的成像数据。 该方法还包括将获取的成像数据重建为初始重建图像，以及对初始重建图像的图像体积进行材料表征以提供重新映射的图像体积。 此外，该方法包括在再映射图像体积上执行向前投影以提供前向投影数据，以及基于前向投影数据提供误差投影。 此外，该方法包括对初始重构图像，重新映射的图像体积，前向投影数据或者误差投影中的至少一个进行滤波。 该方法还包括使用误差投影来更新初始重建图像以提供更新的重建图像。
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14.发明申请SYSTEMS AND METHODS FOR CORRECTING DETECTOR ERRORS IN COMPUTED TOMOGRAPHY IMAGING 有权用于校正计算机图像成像中检测器错误的系统和方法公开(公告)号：US20150182176A1
公开(公告)日：2015-07-02
申请号：US14145018
申请日：2013-12-31
Applicant: General Electric Company
Inventor： Yannan Jin , Peter Michael Edic , Vladimir A. Lobastov , Hewei Gao , Geng Fu
CPC classification number: A61B6/4241 , A61B6/032 , A61B6/482 , G01T1/171
Abstract: A system includes an energy-discriminating, photon-counting X-ray detector, comprising a plurality of detector cells providing measurements corresponding to at least two energy bins and being adapted to produce projection data in response to X-ray photons that reach the X-ray detector and to produce an electrical signal having a recorded count for the energy bins and a total energy intensity. The system also includes data processing circuitry adapted to receive the electrical signal from one or more of the plurality of detector cells, to generate a simulated count rate for each of the energy bins by using the total energy intensity in a detector pile-up model, to determine a set of energy intensity dependent material decomposition vectors, and, for the projection data measured by one or more of the plurality of detector cells, to perform material decomposition by modeling the simulated count rate for each of the energy bins and utilizing a material decomposition vector selected from the set of energy intensity dependent material decomposition vectors and corresponding to the measured energy intensity from one or more of the plurality of detector cells.
Abstract translation: 一种系统包括能量鉴别光子计数X射线检测器，其包括多个检测器单元，其提供对应于至少两个能量箱的测量值，并且适于响应于到达X射线的X射线光子产生投影数据， 并且产生具有用于能量箱的记录计数和总能量强度的电信号。 该系统还包括适于从多个检测器单元中的一个或多个接收电信号的数据处理电路，通过使用检测器堆积模型中的总能量强度来产生每个能量箱的模拟计数率， 以确定一组依赖于能量强度的材料分解向量，并且对于由多个检测器单元中的一个或多个检测器单元测量的投影数据，通过对每个能量箱的模拟计数率进行建模并利用材料来执行材料分解 所述分解矢量选自所述一组能量强度依赖材料分解向量，并对应于来自所述多个检测器单元中的一个或多个的所测量的能量强度。
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15.发明申请公开(公告)号：US20150125055A1
公开(公告)日：2015-05-07
申请号：US14070252
申请日：2013-11-01
Applicant: General Electric Company
Inventor： Hewei Gao , Girijesh K. Yadava , Adam Israel Cohen , Brian Edward Nett
CPC classification number: G01N23/046 , A61B6/032 , A61B6/482 , A61B6/5211 , A61B6/5258 , A61B6/583 , A61B8/0875 , G01N2223/42 , G06T11/005
Abstract: Systems and methods for iterative multi-material correction are provided. A system includes an imager that acquires projection data of an object. A reconstructor reconstructs the acquired projection data into a reconstructed image, utilizes the reconstructed image to perform a multi-material correction on the acquired projection data to generate a multi-material corrected reconstructed image, and utilizes the multi-material corrected reconstructed image to perform one or more iterations of the multi-material correction on the projection data to generate an iteratively corrected multi-material corrected image.
Abstract translation: 提供了迭代多材料校正的系统和方法。 系统包括获取对象的投影数据的成像器。 重构器将所获取的投影数据重建为重建图像，利用重构图像对所获取的投影数据执行多材料校正，以生成多材料校正的重建图像，并利用多材料校正的重建图像来执行一个 或更多次迭代的投影数据上的多材料校正以生成迭代校正的多材料校正图像。
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Patent Agency Ranking
公开(公告)号：US20140328448A1
公开(公告)日：2014-11-06
申请号：US14332020
申请日：2014-07-15
Applicant: General Electric Company
Inventor： Xiaoye Wu , Jiang Hsieh , Paavana Sainath , Dan Xu , Yannan Jin , Girijesh Kumar Yadava , Adam Israel Cohen , Hewei Gao
IPC: A61B6/03
CPC classification number: A61B6/03 , G06T7/0012 , G06T11/008 , G06T2211/408
Abstract: A method is provided. The method includes acquiring projection data of an object from a plurality of pixels, reconstructing the acquired projection data from the plurality of pixels into a reconstructed image, performing material characterization and decomposition of an image volume of the reconstructed image to reduce a number of materials analyzed in the image volume to two basis materials. The method also includes generating a re-mapped image volume for at least one basis material of the two basis materials, and performing forward projection on at least the re-mapped image volume for the at least one basis material to produce a material-based projection. The method further includes generating multi-material corrected projections based on the material-based projection and a total projection attenuated by the object, which represents both of the two basis materials, wherein the multi-material corrected projections include linearized projections.
Abstract translation: 提供了一种方法。 该方法包括从多个像素获取对象的投影数据，将所获取的投影数据从多个像素重建成重建图像，对重建图像执行材料表征和分解，以减少分析的材料数量 在图像体积为两个基础材料。 所述方法还包括为所述两种基础材料的至少一种基础材料生成重新映射的图像体积，以及针对所述至少一种基础材料至少对所述重新映射的图像体积执行向前投影以产生基于材料的投影 。 该方法还包括基于基于材料的投影和由对象衰减的总投影来生成多材料校正投影，其表示两种基础材料，其中多材料校正投影包括线性化投影。
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公开(公告)号：US09836862B2
公开(公告)日：2017-12-05
申请号：US14586663
申请日：2014-12-30
Applicant: General Electric Company
Inventor： Brian Edward Nett , Hewei Gao , Paavana Sainath
CPC classification number: G06T11/008 , A61B6/481 , A61B6/482 , A61B6/5205 , A61B6/5211 , A61B6/5217 , A61B6/5258 , A61B6/585 , G06T11/006 , G06T2211/421 , G06T2211/424
Abstract: Methods and systems are provided for boosting the contrast levels in an image reconstructed from projection data acquired at a single energy. In one embodiment, a method comprises modifying projection data corresponding to a material based on an absorption behavior of the material at a selected energy, wherein the projection data is acquired at an energy higher than the selected energy. In this way, contrast levels may be enhanced in an image reconstructed from projection data acquired at a typical single energy as though the image were reconstructed from projection data acquired at a lower energy.
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18.发明申请公开(公告)号：US20160324499A1
公开(公告)日：2016-11-10
申请号：US14706759
申请日：2015-05-07
Applicant: General Electric Company
Inventor： Kriti Sen Sharma , Hewei Gao , Debashish Pal
CPC classification number: A61B6/5258 , A61B6/032 , A61B6/461 , A61B6/482 , G06T11/005 , G06T11/008 , G06T2207/10081 , G06T2211/408
Abstract: Various methods and systems for spectral computed tomography imaging are provided. In one embodiment, a method comprises acquiring a first projection dataset and a second projection dataset, detecting a location of metal in the first projection dataset, applying corrections to the first and second projection datasets based on the location of the metal, and displaying an image reconstructed from the corrected first and second projection datasets. In this way, metal artifacts may be substantially reduced in dual or multi-energy CT imaging.
Abstract translation: 提供了用于光谱计算机断层摄影成像的各种方法和系统。 在一个实施例中，一种方法包括获取第一投影数据集和第二投影数据集，检测第一投影数据集中的金属位置，基于金属的位置对第一和第二投影数据集进行校正，以及显示图像 从校正的第一和第二投影数据集重建。 以这种方式，在双重或多能CT成像中，金属伪影可能会显着降低。
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公开(公告)号：US09483851B2
公开(公告)日：2016-11-01
申请号：US14330198
申请日：2014-07-14
Applicant: General Electric Company
Inventor： Hewei Gao , Adam Cohen , Brian Edward Nett , Paavana Sainath , Yasuhiro Imai
CPC classification number: G06T11/005 , A61B6/032 , A61B6/5205 , G06T2211/416
Abstract: A method is provided including acquiring imaging data of an object to be imaged from a computed tomography (CT) detector. The method also includes reconstructing the acquired imaging data into an initial reconstruction image, and performing material characterization of an image volume of the initial reconstruction image to provide a re-mapped image volume. Further, the method includes performing forward projection on the re-mapped image volume to provide forward projection data, and providing an error projection based on the forward projection data. Also, the method includes filtering at least one of the initial reconstruction image, the re-mapped image volume, the forward projection data, or the error projection. The method also includes using the error projection to update the initial reconstruction image to provide an updated reconstruction image.
Abstract translation: 提供一种方法，包括从计算机断层摄影（CT）检测器获取要被成像的对象的成像数据。 该方法还包括将获取的成像数据重建为初始重建图像，以及对初始重建图像的图像体积进行材料表征以提供重新映射的图像体积。 此外，该方法包括在再映射图像体积上执行向前投影以提供前向投影数据，以及基于前向投影数据提供误差投影。 此外，该方法包括对初始重构图像，重新映射的图像体积，前向投影数据或者误差投影中的至少一个进行滤波。 该方法还包括使用误差投影来更新初始重建图像以提供更新的重建图像。
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公开(公告)号：US09374565B2
公开(公告)日：2016-06-21
申请号：US14535017
申请日：2014-11-06
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Hewei Gao , Girijesh Kumar Yadava , Adam Israel Cohen , Yannan Jin
CPC classification number: H04N9/3185 , G06T5/001 , G06T11/005 , G06T11/008 , G06T2211/408
Abstract: A method includes acquiring projection data of an object from a plurality of detector elements, reconstructing the acquired projection data into a first reconstructed image, and performing material characterization of an image volume of the first reconstructed image to reduce a number of materials analyzed in the image volume to two basis materials. Performing material characterization includes utilizing a generalized modeling function to estimate a fraction of at least one basis material within each voxel of the image volume. The method also includes generating a re-mapped image volume for the at least one basis material of the two basis materials, performing forward projection on at least the re-mapped image volume for the at least one basis material to produce a material-based projection, and generating multi-material corrected projections based on the material-based projection and a total projection attenuated by the object, which represents both of the two basis materials.
Abstract translation: 一种方法包括从多个检测器元件获取物体的投影数据，将所获取的投影数据重建为第一重建图像，以及执行第一重建图像的图像体积的材料表征以减少图像中分析的材料数量 体积到两种基础材料。 执行材料表征包括利用广义建模功能来估计图像体积的每个体素内的至少一种基础材料的分数。 该方法还包括为两个基础材料的至少一个基础材料生成重新映射的图像体积，在至少一个基础材料的至少一个重新映射的图像体积上执行向前投影以产生基于材料的投影 并且基于基于材料的投影和由对象衰减的总投影来生成表示两种基础材料的多材料校正投影。
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