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公开(公告)号：US10573028B2
公开(公告)日：2020-02-25
申请号：US16511201
申请日：2019-07-15
Applicant: General Electric Company
Inventor： Roshni Bhagalia , Debashish Pal
Abstract: As set forth herein low energy signal data and high energy signal data can be acquired. A first material decomposed (MD) image of a first material basis and a second material decomposed (MD) image of a second material basis can be obtained using the low energy signal data and the high energy signal data. At least one of the first or second MD image can be input into a guide filter for output of at least one noise reduced and cross-contamination reduced image. A computed tomography (CT) imaging system can be provided that includes an X-ray source and a detector having a plurality of detector elements that detect X-ray beams emitted from the X-ray source. Low energy signal data and high energy signal data can be acquired using the detector.
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公开(公告)号：US20160350944A1
公开(公告)日：2016-12-01
申请号：US14755387
申请日：2015-06-30
Inventor： Debashish Pal , Evgeny Drapkin , Jean-Baptiste Thibault , Somesh Srivastava , Ryan Thome , Madison Mcgaffin , Jeff Fessier , Donghwan Kim
CPC classification number: G06T11/005 , A61B6/032 , A61B6/5205 , A61B6/5258 , G06T7/0012 , G06T11/006 , G06T2207/10081 , G06T2211/424
Abstract: A method for iteratively reconstructing an image is provided. The method includes acquiring, with a detector, computed tomography (CT) imaging information. The method also includes generating, with at least one processor, sinogram information from the CT imaging information. Further, the method includes generating, with the at least one processor, image domain information from the CT imaging information. Also, the method includes updating the image using the sinogram information. The method further includes updating the image using the image domain information. Updating the image using the sinogram information and updating the image using the image domain information are performed separately and alternately in an iterative fashion.
Abstract translation: 提供了一种用于迭代重建图像的方法。 该方法包括用检测器获取计算机断层摄影（CT）成像信息。 该方法还包括利用至少一个处理器从CT成像信息生成正弦图信息。 此外，该方法包括利用至少一个处理器从CT成像信息生成图像域信息。 此外，该方法包括使用正弦图信息更新图像。 该方法还包括使用图像域信息更新图像。 使用图像信息更新图像并使用图像域信息更新图像以迭代的方式分别且交替地执行。
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3.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：US20190340792A1
公开(公告)日：2019-11-07
申请号：US16511201
申请日：2019-07-15
Applicant: General Electric Company
Inventor： Roshni Bhagalia , Debashish Pal
Abstract: As set forth herein low energy signal data and high energy signal data can be acquired. A first material decomposed (MD) image of a first material basis and a second material decomposed (MD) image of a second material basis can be obtained using the low energy signal data and the high energy signal data. At least one of the first or second MD image can be input into a guide filter for output of at least one noise reduced and cross-contamination reduced image. A computed tomography (CT) imaging system can be provided that includes an X-ray source and a detector having a plurality of detector elements that detect X-ray beams emitted from the X-ray source. Low energy signal data and high energy signal data can be acquired using the detector.
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公开(公告)号：US09508163B2
公开(公告)日：2016-11-29
申请号：US13918517
申请日：2013-06-14
Inventor： Zhou Yu , Bruno Kristiaan Bernard De Man , Jean-Baptiste Thibault , Debashish Pal , Lin Fu , Charles A. Bouman , Jeffrey Allen Fessler , Hung Nien
CPC classification number: G06T11/006 , G06T2211/424 , G06T2211/428
Abstract: A framework for an iterative reconstruction algorithm is described which combines two or more of an ordered subset method, a preconditioner method, and a nested loop method. In one type of implementation a nested loop (NL) structure is employed where the inner loop sub-problems are solved using ordered subset (OS) methods. The inner loop may be solved using OS and a preconditioner method. In other implementations, the inner loop problems are created by augmented Lagrangian methods and then solved using OS method.
Abstract translation: 描述了一种迭代重建算法的框架，其结合有序子集方法，预处理器方法和嵌套循环方法中的两个或更多个。 在一种类型的实现中，使用嵌套循环（NL）结构，其中使用有序子集（OS）方法来解决内循环子问题。 可以使用OS和预处理器方法来解决内循环。 在其他实现中，内循环问题是通过增强拉格朗日方法产生的，然后使用OS方法求解。
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Patent Agency Ranking
公开(公告)号：US09721361B2
公开(公告)日：2017-08-01
申请号：US14755387
申请日：2015-06-30
Inventor： Debashish Pal , Evgeny Drapkin , Jean-Baptiste Thibault , Somesh Srivastava , Ryan Thome , Madison G. McGaffin , Jeffrey A. Fessler , Donghwan Kim
CPC classification number: G06T11/005 , A61B6/032 , A61B6/5205 , A61B6/5258 , G06T7/0012 , G06T11/006 , G06T2207/10081 , G06T2211/424
Abstract: A method for iteratively reconstructing an image is provided. The method includes acquiring, with a detector, computed tomography (CT) imaging information. The method also includes generating, with at least one processor, sinogram information from the CT imaging information. Further, the method includes generating, with the at least one processor, image domain information from the CT imaging information. Also, the method includes updating the image using the sinogram information. The method further includes updating the image using the image domain information. Updating the image using the sinogram information and updating the image using the image domain information are performed separately and alternately in an iterative fashion.
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公开(公告)号：US20170010224A1
公开(公告)日：2017-01-12
申请号：US15270368
申请日：2016-09-20
Inventor： Jean-Baptiste Thibault , Debashish Pal , Jie Tang , Ken David Sauer , Charles Bouman , Ruoqiao Zhang
CPC classification number: G01N23/046 , G01N23/087 , G01N2223/423 , G01N2223/501 , G01N2223/612 , G01T1/36 , G06T3/0056 , G06T5/002 , G06T5/10 , G06T7/0012 , G06T11/008 , G06T2207/10004 , G06T2207/10081 , G06T2211/408
Abstract: A method includes obtaining spectral computed tomography (CT) information via an acquisition unit having an X-ray source and a CT detector. The method also includes, generating, with one or more processing units, using at least one image transform, a first basis image and a second basis image using the spectral CT information. Further, the method includes performing, with the one or more processing units, guided processing on the second basis image using the first basis image as a guide to provide a modified second basis image. Also, the method includes performing at least one inverse image transform using the first basis image and the modified second basis image to generate at least one modified image.
Abstract translation: 一种方法包括经由具有X射线源和CT检测器的获取单元获得频谱计算机断层摄影（CT）信息。 该方法还包括利用一个或多个处理单元使用频谱CT信息使用至少一个图像变换，第一基础图像和第二基础图像来生成。 此外，该方法包括使用第一基础图像作为指导，使用一个或多个处理单元执行对第二基础图像的引导处理，以提供修改的第二基本图像。 此外，该方法包括使用第一基础图像和修改的第二基础图像来执行至少一个逆图像变换以生成至少一个修改图像。
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8.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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公开(公告)号：US09406154B2
公开(公告)日：2016-08-02
申请号：US13918656
申请日：2013-06-14
Inventor： Lin Fu , Madison Gray McGaffin , Zhou Yu , Jean-Baptiste Thibault , Sathish Ramani , Jeffrey Allen Fessler , Bruno Kristiaan Bernard De Man , Debashish Pal
IPC: G06T11/00
CPC classification number: G06T11/006 , G06T2211/424
Abstract: The use of the channelized preconditioners in iterative reconstruction is disclosed. In certain embodiments, different channels correspond to different frequency sub-bands and the output of the different channels can be combined to update an image estimate used in the iterative reconstruction process. While individual channels may be relatively simple, the combined channels can represent complex spatial variant operations. The use of channelized preconditioners allows empirical adjustment of individual channels.
Abstract translation: 公开了在迭代重建中使用信道化预处理器。 在某些实施例中，不同的信道对应于不同的频率子带，并且可以组合不同信道的输出以更新在迭代重建过程中使用的图像估计。 虽然单个通道可能相对简单，但组合通道可以表示复杂的空间变体操作。 通道化预处理器的使用允许对各个通道进行实证调整。
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10.发明授权System and method for reducing high density artifacts in computed tomography imaging 有权用于降低计算机断层成像中高密度伪影的系统和方法公开(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
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。
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