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

IPC: G06K9/00 ,  A61B6/00 ,  G06T11/00

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.

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

IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00

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。

公开(公告)号：US09025815B2

公开(公告)日：2015-05-05

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: G06K9/00 ,  A61B6/03 ,  G06T7/00 ,  G06T11/00 ,  A61B6/00

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。

公开(公告)号：US20140133719A1

公开(公告)日：2014-05-15

申请号：US13677010

申请日：2012-11-14

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Xiaoye Wu ,  Jiang Hsieh ,  Paavana Sainath ,  Dan Xu ,  Yannan Jin ,  Girijesh Kumar Yadava ,  Adam Israel Cohen ,  Hewei Gao

IPC: G06T7/00

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.

公开(公告)号：US20140328450A1

公开(公告)日：2014-11-06

申请号：US13875369

申请日：2013-05-02

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Debashish Pal ,  Jiang Hsieh ,  Paavana Sainath ,  Girijesh Yadava ,  Brian Edward Nett

IPC: G01N23/04

CPC classification number: G01N23/046 ,  A61B6/032 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5258 ,  A61B6/545 ,  G01V5/005

Abstract: An imaging system includes a rotatable gantry for receiving an object to be scanned, a generator configured to energize an x-ray source to generate x-rays, a detector positioned to receive the x-rays that pass through the object, and a computer. The computer is programmed to obtain knowledge of a metal within the object, scan the object using system scanning parameters, reconstruct an image of the object using a reconstruction algorithm, and automatically select at least one of the system scanning parameters and the reconstruction algorithm based on the obtained knowledge.

Abstract translation: 成像系统包括用于接收待扫描物体的可旋转机架，被配置为激励X射线源以产生X射线的发生器，定位成接收穿过物体的x射线的检测器以及计算机。 计算机被编程以获得对象内的金属的知识，使用系统扫描参数扫描对象，使用重建算法重构对象的图像，并且基于以下方式自动选择系统扫描参数和重建算法中的至少一个： 获得知识。

公开(公告)号：US08811709B2

公开(公告)日：2014-08-19

申请号：US13677010

申请日：2012-11-14

Applicant: General Electric Company

Inventor： Xiaoye Wu ,  Jiang Hsieh ,  Paavana Sainath ,  Dan Xu ,  Yannan Jim ,  Girijesh Kumar Yadava ,  Adam Israel Cohen ,  Hewei Gao

IPC: G06K9/00 ,  A61B6/00

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。

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

IPC: G06T11/00 ,  A61B6/00

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。

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

IPC: G06T11/00 ,  A61B6/00 ,  A61B6/03

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。

公开(公告)号：US09074986B2

公开(公告)日：2015-07-07

申请号：US13875369

申请日：2013-05-02

Applicant: General Electric Company

Inventor： Debashish Pal ,  Jiang Hsieh ,  Paavana Sainath ,  Girijesh Yadava ,  Brian Edward Nett

IPC: G01N23/04 ,  G01V5/00 ,  A61B6/03 ,  A61B6/00

CPC classification number: G01N23/046 ,  A61B6/032 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5258 ,  A61B6/545 ,  G01V5/005

Abstract: An imaging system includes a rotatable gantry for receiving an object to be scanned, a generator configured to energize an x-ray source to generate x-rays, a detector positioned to receive the x-rays that pass through the object, and a computer. The computer is programmed to obtain knowledge of a metal within the object, scan the object using system scanning parameters, reconstruct an image of the object using a reconstruction algorithm, and automatically select at least one of the system scanning parameters and the reconstruction algorithm based on the obtained knowledge.

Abstract translation: 成像系统包括用于接收待扫描物体的可旋转机架，被配置为激励X射线源以产生X射线的发生器，定位成接收穿过物体的x射线的检测器以及计算机。 计算机被编程以获得对象内的金属的知识，使用系统扫描参数扫描对象，使用重建算法重构对象的图像，并且基于以下方式自动选择系统扫描参数和重建算法中的至少一个： 获得知识。

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。