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    FEW-VIEW CT IMAGE RECONSTRUCTION SYSTEM
    1.
    发明申请
    FEW-VIEW CT IMAGE RECONSTRUCTION SYSTEM 有权

    公开(公告)号：US20220375142A1

    公开(公告)日：2022-11-24

    申请号：US17642725

    申请日：2020-09-14

    申请人： Huidong Xie ,  Ge Wang ,  Hongming Shan ,  Wenxiang Cong

    发明人： Huidong Xie ,  Ge Wang ,  Hongming Shan ,  Wenxiang Cong

    IPC分类号： G06T11/00

    摘要： A system for few-view computed tomography (CT) image reconstruction is described. The system includes a preprocessing module, a first generator network, and a discriminator network. The preprocessing module is configured to apply a ramp filter to an input sinogram to yield a filtered sinogram. The first generator network is configured to receive the filtered sinogram, to learn a filtered back-projection operation and to provide a first reconstructed image as output. The first reconstructed image corresponds to the input sinogram. The discriminator network is configured to determine whether a received image corresponds to the first reconstructed image or a corresponding ground truth image. The generator network and the discriminator network correspond to a Wasserstein generative adversarial network (WGAN). The WGAN is optimized using an objective function based, at least in part, on a Wasserstein distance and based, at least in part, on a gradient penalty.

    Few-view CT image reconstruction system
    2.
    发明授权
    Few-view CT image reconstruction system 有权

    公开(公告)号：US11806175B2

    公开(公告)日：2023-11-07

    申请号：US17642725

    申请日：2020-09-14

    申请人： Huidong Xie ,  Ge Wang ,  Hongming Shan ,  Wenxiang Cong

    发明人： Huidong Xie ,  Ge Wang ,  Hongming Shan ,  Wenxiang Cong

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

    CPC分类号： A61B6/032 ,  A61B6/5205 ,  G06T11/005 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/436

    摘要： A system for few-view computed tomography (CT) image reconstruction is described. The system includes a preprocessing module, a first generator network, and a discriminator network. The preprocessing module is configured to apply a ramp filter to an input sinogram to yield a filtered sinogram. The first generator network is configured to receive the filtered sinogram, to learn a filtered back-projection operation and to provide a first reconstructed image as output. The first reconstructed image corresponds to the input sinogram. The discriminator network is configured to determine whether a received image corresponds to the first reconstructed image or a corresponding ground truth image. The generator network and the discriminator network correspond to a Wasserstein generative adversarial network (WGAN). The WGAN is optimized using an objective function based, at least in part, on a Wasserstein distance and based, at least in part, on a gradient penalty.

    LOW-DIMENSIONAL MANIFOLD CONSTRAINED DISENTANGLEMENT NETWORK FOR METAL ARTIFACT REDUCTION
    3.
    发明申请
    LOW-DIMENSIONAL MANIFOLD CONSTRAINED DISENTANGLEMENT NETWORK FOR METAL ARTIFACT REDUCTION 有权

    公开(公告)号：US20230026961A1

    公开(公告)日：2023-01-26

    申请号：US17859186

    申请日：2022-07-07

    申请人： Ge Wang ,  Chuang Niu ,  Wenxiang Cong

    发明人： Ge Wang ,  Chuang Niu ,  Wenxiang Cong

    IPC分类号： G06T11/00 ,  G06T5/00 ,  G06N3/04

    摘要： In one embodiment, there is provided an apparatus for low-dimensional manifold constrained disentanglement for metal artifact reduction (MAR) in computed tomography (CT) images. The apparatus includes a patch set construction module, a manifold dimensionality module, and a training module. The patch set construction module is configured to construct a patch set based, at least in part on training data. The manifold dimensionality module is configured to determine a dimensionality of a manifold. The training module is configured to optimize a combination loss function comprising a network loss function and the manifold dimensionality. The optimizing the combination loss function includes optimizing at least one network parameter.

    DYNAMIC BOWTIE FILTER FOR CONE-BEAM/MULTI-SLICE CT
    4.
    发明申请
    DYNAMIC BOWTIE FILTER FOR CONE-BEAM/MULTI-SLICE CT 审中-公开
    锥形/多层CT的动态波纹过滤器

    公开(公告)号：US20160113602A1

    公开(公告)日：2016-04-28

    申请号：US14924495

    申请日：2015-10-27

    申请人： Ge Wang ,  Fenglin Liu ,  Wenxiang Cong ,  Qingsong Yang

    发明人： Ge Wang ,  Fenglin Liu ,  Wenxiang Cong ,  Qingsong Yang

    IPC分类号： A61B6/00 ,  A61B6/03

    CPC分类号： A61B6/4035 ,  A61B6/032 ,  A61B6/482 ,  A61B6/544 ,  A61B6/583

    摘要： Dynamic bowties, imaging systems including a bowtie, and methods of imaging including such bowties or systems are provided. A bowtie can be a three-dimensional (3-D) dynamic bowtie and can include a highly-attenuating bowtie (HB) and a weakly-attenuating bowtie (WB). The HB can be filled with a liquid, and the WB can be immersed in the liquid of the HB.

    摘要翻译： 提供动态弯曲，包括弓形的成像系统，以及包括这种弯曲或系统的成像方法。 Bowtie可以是一个三维（3-D）动态的蝴蝶结，可以包括高度衰减的蝴蝶结（HB）和弱衰减的蝴蝶结（WB）。 HB可以充满液体，WB可以浸入HB的液体中。

    X-RAY PHASE-CONTRAST IMAGING
    5.
    发明申请
    X-RAY PHASE-CONTRAST IMAGING 有权
    X射线相位成像

    公开(公告)号：US20160135769A1

    公开(公告)日：2016-05-19

    申请号：US14943157

    申请日：2015-11-17

    申请人： Ge Wang ,  Yan Xi ,  Wenxiang Cong

    发明人： Ge Wang ,  Yan Xi ,  Wenxiang Cong

    IPC分类号： A61B6/00 ,  G06T11/00 ,  G06T7/00

    CPC分类号： A61B6/484 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4233 ,  A61B6/4291 ,  A61B6/5205 ,  G06T11/005 ,  G21K1/025 ,  G21K2207/005

    摘要： Systems and methods for X-ray phase-contrast imaging (PCI) are provided. A quasi-periodic phase grating can be positioned between an object being imaged and a detector. An analyzer grating can be disposed between the phase grating and the detector. Second-order approximation models for X-ray phase retrieval using paraxial Fresnel-Kirchhoff diffraction theory are also provided. An iterative method can be used to reconstruct a phase-contrast image or a dark-field image.

    摘要翻译： 提供了X射线相位对比成像（PCI）的系统和方法。 准周期相位光栅可以位于被成像对象和检测器之间。 分析器光栅可以设置在相位光栅和检测器之间。 还提供了使用近轴菲涅尔 - 基尔霍夫衍射理论的X射线相位检索的二阶近似模型。 可以使用迭代方法来重建相位对比度图像或暗视场图像。

    Multi-Parameter X-Ray Computed Tomography
    6.
    发明申请
    Multi-Parameter X-Ray Computed Tomography 有权
    多参数X射线计算机断层扫描

    公开(公告)号：US20100310037A1

    公开(公告)日：2010-12-09

    申请号：US12794160

    申请日：2010-06-04

    申请人： Ge WANG ,  Wenxiang Cong

    发明人： Ge WANG ,  Wenxiang Cong

    IPC分类号： G01N23/201 ,  A61B6/03

    CPC分类号： A61B6/06 ,  A61B6/032 ,  A61B6/4291 ,  A61B6/583

    摘要： The present invention relates to the field of x-ray imaging. More particularly, embodiments of the invention relate to methods, systems, and apparatus for imaging, which can be used in a wide range of applications, including medical imaging, security screening, and industrial non-destructive testing to name a few. Specifically provided as embodiments of the invention are systems for x-ray imaging comprising: a) a first collimator-and-detector assembly having a first operable configuration to provide at least one first dataset comprising primary x-ray signals as a majority component of its data capable of being presented as a first image of an object subjected to x-ray imaging; b) a second collimator-and-detector assembly having a second operable configuration or wherein the first collimator-and-detector assembly is adjustable to a second configuration to provide at least one second dataset comprising primary and dark-field x-ray signals as a majority component of its data capable of being presented as a second image of the object; and c) a computer operably coupled with the collimator-and-detector assemblies comprising a computer readable medium embedded with processing means for combining the first dataset and the second dataset to extract the dark-field x-ray signals and produce a target image having higher contrast quality than the images based on the first or second dataset alone. Such systems can be configured to comprise at least two collimator-and-detector assemblies or configurations differing with respect to collimator height, collimator aperture, imaging geometry, or distance between an object subjected to the imaging and the collimator-and-detector assembly.

    摘要翻译： 本发明涉及X射线成像领域。 更具体地，本发明的实施例涉及用于成像的方法，系统和装置，其可以用于广泛的应用，包括医学成像，安全性筛选和工业非破坏性测试等等。 作为本发明的实施例具体提供的是用于x射线成像的系统，包括：a）第一准直仪和检测器组件，其具有第一可操作配置，以提供至少一个第一数据集，所述第一数据集包括主X射线信号作为其主要成分 能够被呈现为经受X射线成像的物体的第一图像的数据; b）具有第二可操作构型的第二准直器和检测器组件，或者其中第一准直器和检测器组件可调整到第二配置以提供包括主场和暗场x射线信号的至少一个第二数据集，作为 其数据的多数分量能够被呈现为对象的第二图像; 以及c）与所述准直仪和检测器组件可操作地耦合的计算机，包括嵌入有处理装置的计算机可读介质，所述处理装置用于组合所述第一数据集和所述第二数据集以提取所述暗场x射线信号并产生具有较高 对比质量比基于第一或第二数据集的图像单独。 这样的系统可以被配置为包括关于准直器高度，准直器孔径，成像几何形状或经受成像的物体与准直器和检测器组件之间的距离不同的至少两个准直器和检测器组件或构造。

    Extended interior methods and systems for spectral, optical, and photoacoustic imaging
    9.
    发明授权
    Extended interior methods and systems for spectral, optical, and photoacoustic imaging 有权
    用于光谱，光学和光声成像的扩展内部方法和系统

    公开(公告)号：US08862206B2

    公开(公告)日：2014-10-14

    申请号：US12945733

    申请日：2010-11-12

    申请人： Ge Wang ,  Yong Xu ,  Alexander Cong ,  Haiou Shen ,  Wenxiang Cong ,  Lin Yang ,  Yang Lu

    发明人： Ge Wang ,  Yong Xu ,  Alexander Cong ,  Haiou Shen ,  Wenxiang Cong ,  Lin Yang ,  Yang Lu

    IPC分类号： A61B5/05 ,  G01N23/04 ,  G06T11/00 ,  A61B6/00 ,  A61B6/03 ,  A61B5/00

    CPC分类号： A61B6/032 ,  A61B5/0095 ,  A61B5/7232 ,  A61B6/4007 ,  A61B6/508 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/006 ,  G06T2211/424 ,  G06T2211/432 ,  G06T2211/436

    摘要： The present invention relates to the field of medical imaging. More particularly, embodiments of the invention relate to methods, systems, and devices for imaging, including for tomography-based applications. Embodiments of the invention include, for example, a computed tomography based imaging system comprising: (a) at least one wide-beam gray-scale imaging chain capable of performing a global scan of an object and acquiring projection data relating to the object; (b) at least one narrow-beam true-color imaging chain capable of performing a spectral interior scan of a region of interest (ROI) of and acquiring projection data relating to the object; (c) a processing module operably configured for: (1) receiving the projection data; (2) reconstructing the ROI into an image by analyzing the data with a color interior tomography algorithm, aided by an individualized gray-scale reconstruction of an entire field of view (FOV), including the ROI; and (d) a processor for executing the processing module. The extended interior methods and systems for spectral, optical, and photoacoustic imaging presented in this application can lead to better medical diagnoses by providing images with higher resolution or quality, and can lead to safer procedures by providing systems capable of reducing a patient's exposure time to, and thus quantity of, potentially harmful x-rays. Embodiments of the invention also provide tools for real-time tomography-based analyses.

    摘要翻译： 本发明涉及医学成像领域。 更具体地，本发明的实施例涉及用于成像的方法，系统和装置，包括用于基于层析摄影的应用。 本发明的实施例包括例如基于计算机断层摄影的成像系统，包括：（a）至少一个能够执行对象的全局扫描并获取与该对象有关的投影数据的宽光束灰度级成像链; （b）至少一个能够执行感兴趣区域（ROI）的光谱内部扫描并获取与该对象有关的投影数据的窄束真彩色成像链; （c）可操作地配置用于：（1）接收投影数据的处理模块; （2）通过在包括ROI的整个视场（FOV）的个体化灰度重建的辅助下，利用颜色内部层析成像算法分析数据，将ROI重建成图像; 和（d）用于执行处理模块的处理器。 本应用中提出的用于光谱，光学和光声成像的扩展内部方法和系统可以通过提供具有更高分辨率或质量的图像来导致更好的医学诊断，并且可以通过提供能够减少患者的暴露时间的系统来导致更安全的程序 ，因此可能有害x射线的数量。 本发明的实施例还提供用于基于实时断层摄影的分析的工具。