公开(公告)号：US20140363069A1

公开(公告)日：2014-12-11

申请号：US14469821

申请日：2014-08-27

Applicant: General Electric Company

Inventor： Jiang Hsieh ,  Brian Edward Nett ,  Pavaana Sainath ,  Debashish Pal

IPC: G06T5/00 ,  G06T7/00

CPC classification number: G06T5/005 ,  A61B6/032 ,  A61B6/405 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5205 ,  A61B6/5258 ,  G06T7/0012 ,  G06T11/005 ,  G06T2211/408

Abstract: A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image.

公开(公告)号：US10403006B2

公开(公告)日：2019-09-03

申请号：US15248119

申请日：2016-08-26

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Roshni Bhagalia ,  Debashish Pal

IPC: G06T11/00 ,  G06T5/00 ,  A61B6/03 ,  A61B6/00 ,  G06T5/50

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.

公开(公告)号：US09460485B2

公开(公告)日：2016-10-04

申请号：US14566874

申请日：2014-12-11

Applicant: General Electric Company

Inventor： Jean-Baptiste Thibault ,  Debashish Pal ,  Jie Tang ,  Ken David Sauer ,  Charles Bouman ,  Ruoqiao Zhang

IPC: G06T3/00 ,  G01N23/04 ,  G01T1/36 ,  G01N23/087 ,  G06T5/10

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。

公开(公告)号：US20160171648A1

公开(公告)日：2016-06-16

申请号：US14566874

申请日：2014-12-11

Applicant: General Electric Company

Inventor： Jean-Baptiste Thibault ,  Debashish Pal ,  Jie Tang ,  Ken David Sauer ,  Charles Bouman ,  Ruoqiao Zhang

IPC: G06T3/00 ,  G06T5/10 ,  G01N23/087 ,  G01N23/04 ,  G01T1/36

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。

公开(公告)号：US09036886B2

公开(公告)日：2015-05-19

申请号：US14469821

申请日：2014-08-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jiang Hsieh ,  Brian Edward Nett ,  Pavaana Sainath ,  Debashish Pal

IPC: G06K9/00 ,  G06T5/00 ,  G06T7/00 ,  G06T11/00 ,  G01N23/04

CPC classification number: G06T5/005 ,  A61B6/032 ,  A61B6/405 ,  A61B6/482 ,  A61B6/488 ,  A61B6/5205 ,  A61B6/5258 ,  G06T7/0012 ,  G06T11/005 ,  G06T2211/408

Abstract: A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image.

公开(公告)号：US20140369581A1

公开(公告)日：2014-12-18

申请号：US13918656

申请日：2013-06-14

Applicant: The Regents of the University of Michigan ,  General Electric Company

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。

公开(公告)号：US20140369580A1

公开(公告)日：2014-12-18

申请号：US13918517

申请日：2013-06-14

Applicant: General Electric Company ,  Purdue University ,  The Regents of the University of Michigan

Inventor： Zhou Yu ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Debashish Pal ,  Lin Fu ,  Charles A. Bouman ,  Jeffrey Allen Fessler ,  Hung Nien

IPC: G06T11/00

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。

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。