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    System and method of fast kVp switching for dual energy CT
    3.
    发明授权
    System and method of fast kVp switching for dual energy CT 有权
    双能CT快速kVp开关系统及方法

    公开(公告)号：US07826587B1

    公开(公告)日：2010-11-02

    申请号：US12558248

    申请日：2009-09-11

    申请人： David Allen Langan ,  John Eric Tkaczyk ,  James Walter LeBlanc ,  Colin R. Wilson ,  Xiaoye Wu ,  Dan Xu ,  Thomas Matthew Benson ,  Jed Douglas Pack

    发明人： David Allen Langan ,  John Eric Tkaczyk ,  James Walter LeBlanc ,  Colin R. Wilson ,  Xiaoye Wu ,  Dan Xu ,  Thomas Matthew Benson ,  Jed Douglas Pack

    IPC分类号： H05G1/60

    CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/482

    摘要： A CT system includes a gantry, an x-ray source, a generator configured to energize the x-ray source to a first kVp and to a second kVp, a detector, and a controller. The controller is configured energize the x-ray source to the first kVp for a first time period, subsequently energize the x-ray source to the second kVp for a second time period, integrate data for a first integration period that includes a portion of a steady-state period of the x-ray source at the first kVp, integrate data for a second integration period that includes a portion of a steady-state period of the x-ray source at the second kVp, compare a signal-to-noise ratio (SNR) during the first integration period (SNRH) and the second integration period (SNRL), adjust an operating parameter of the CT system to optimize an SNRH with SNRL, and generate an image using the integrated data.

    摘要翻译： CT系统包括台架，x射线源，被配置为将x射线源激发到第一kVp的发生器和到第二kVp的检测器和控制器的发生器。 控制器被配置为在第一时间段内将x射线源激励到第一kVp，随后将x射线源激励到第二kVp第二时间段，将包含第一时间段的第一积分周期的数据整合 在第一kVp处的x射线源的稳态周期，将包括X射线源的稳态周期的一部分的第二积分周期的数据集成在第二kVp处，比较信号与噪声 在第一积分周期（SNRH）和第二积分周期（SNRL）期间的比率（SNR），调整CT系统的运行参数以利用SNRL优化SNRH，并使用积分数据生成图像。

    METHOD AND SYSTEM FOR CORRELATED NOISE SUPPRESSION IN DUAL ENERGY IMAGING
    4.
    发明申请
    METHOD AND SYSTEM FOR CORRELATED NOISE SUPPRESSION IN DUAL ENERGY IMAGING 有权
    双能量成像中相关噪声抑制的方法与系统

    公开(公告)号：US20120134561A1

    公开(公告)日：2012-05-31

    申请号：US12955227

    申请日：2010-11-29

    申请人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu ,  Jed Douglas Pack ,  Andrea Marie Schmitz

    发明人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu ,  Jed Douglas Pack ,  Andrea Marie Schmitz

    IPC分类号： G06K9/00

    CPC分类号： G06T11/008 ,  G06T5/002 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2211/408

    摘要： Methods and systems for correlated noise suppression are presented. The present correlated noise suppression technique estimates a correlation direction between noise values in a first and a second MD image corresponding to a first and a second basis material, respectively. The two MD images are diffused using the estimated correlation direction to generate a first and a second diffused image. Further, first and second noise masks are generated by subtracting the diffused image from the corresponding MD image. Edges in the first and the second MD images are processed with the first and second noise masks, respectively to generate a final first noise mask and a final second noise mask. The first MD image is then processed with the final second noise mask to generate a final first MD image and the second MD image is processed with the final first noise mask to generate a final second MD image.

    摘要翻译： 提出了相关噪声抑制的方法和系统。 本相关噪声抑制技术分别估计与第一和第二基础材料对应的第一和第二MD图像中的噪声值之间的相关方向。 使用估计的相关方向来扩散两个MD图像以生成第一和第二扩散图像。 此外，通过从相应的MD图像中减去漫射图像来产生第一和第二噪声掩码。 第一和第二MD图像中的边缘分别用第一和第二噪声掩模进行处理，以产生最终的第一噪声掩模和最终的第二噪声掩模。 然后用最终的第二噪声掩码处理第一MD图像以产生最终的第一MD图像，并且用最终的第一噪声掩码处理第二MD图像以产生最终的第二MD图像。

    System and method of data interpolation in fast kVp switching dual energy CT
    5.
    发明授权
    System and method of data interpolation in fast kVp switching dual energy CT 有权
    快速kVp开关双能CT数据插值系统与方法

    公开(公告)号：US07995702B2

    公开(公告)日：2011-08-09

    申请号：US12547117

    申请日：2009-08-25

    申请人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu

    发明人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu

    IPC分类号： A61B6/00

    CPC分类号： G01N23/046 ,  A61B6/027 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/005 ,  G06T2211/408

    摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, an x-ray source coupled to the gantry and configured to project x-rays through the opening, a generator configured to energize the x-ray source to a first kVp and to a second kVp to generate the x-rays, and a detector having pixels therein, the detector attached to the gantry and positioned to receive the x-rays. The system includes a computer programmed to acquire a first view dataset and a second view dataset with the x-ray source energized to the first kVp, interpolate the first and second view datasets to generate interpolated pixels in an interpolated view dataset at the first kVp, using at least two pixels from each of the first and second view datasets to generate each interpolated pixel in the interpolated view dataset, and generate an image of the object using the interpolated view dataset.

    摘要翻译： CT系统包括可旋转机架，其具有用于接收待扫描物体的开口，耦合到台架的X射线源，并且被配置成将X射线投射穿过开口;发生器，被配置为将x射线源激励到 第一kVp和第二kVp以产生x射线，以及其中具有像素的检测器，所述检测器附接到台架并定位成接收x射线。 该系统包括被编程为获取第一视图数据集的计算机和具有激励到第一kVp的x射线源的第二视图数据集，内插第一和第二视图数据集以在第一kVp的内插视图数据集中生成内插像素， 使用来自第一和第二视图数据集中的每一个的至少两个像素来生成内插视图数据集中的每个内插像素，并且使用内插视图数据集生成对象的图像。

    SYSTEM AND METHOD OF DATA INTERPOLATION IN FAST KVP SWITCHING DUAL ENERGY CT
    6.
    发明申请
    SYSTEM AND METHOD OF DATA INTERPOLATION IN FAST KVP SWITCHING DUAL ENERGY CT 有权
    快速KVP切换双能量CT数据插值系统与方法

    公开(公告)号：US20110052022A1

    公开(公告)日：2011-03-03

    申请号：US12547117

    申请日：2009-08-25

    申请人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu

    发明人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu

    IPC分类号： G06K9/00 ,  G01N23/00

    CPC分类号： G01N23/046 ,  A61B6/027 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/005 ,  G06T2211/408

    摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, an x-ray source coupled to the gantry and configured to project x-rays through the opening, a generator configured to energize the x-ray source to a first kVp and to a second kVp to generate the x-rays, and a detector having pixels therein, the detector attached to the gantry and positioned to receive the x-rays. The system includes a computer programmed to acquire a first view dataset and a second view dataset with the x-ray source energized to the first kVp, interpolate the first and second view datasets to generate interpolated pixels in an interpolated view dataset at the first kVp, using at least two pixels from each of the first and second view datasets to generate each interpolated pixel in the interpolated view dataset, and generate an image of the object using the interpolated view dataset.

    摘要翻译： CT系统包括可旋转机架，其具有用于接收待扫描物体的开口，耦合到台架的X射线源，并且被配置成将X射线投射穿过开口;发生器，被配置为将x射线源激励到 第一kVp和第二kVp以产生x射线，以及其中具有像素的检测器，所述检测器附接到台架并定位成接收x射线。 该系统包括被编程为获取第一视图数据集的计算机和具有激励到第一kVp的x射线源的第二视图数据集，内插第一和第二视图数据集以在第一kVp的内插视图数据集中生成内插像素， 使用来自第一和第二视图数据集中的每一个的至少两个像素来生成内插视图数据集中的每个内插像素，并且使用内插视图数据集生成对象的图像。

    Apparatus and method for voltage modulation in X-ray computed tomography
    7.
    发明授权
    Apparatus and method for voltage modulation in X-ray computed tomography 有权
    X射线计算机断层扫描中电压调制的装置和方法

    公开(公告)号：US08155263B2

    公开(公告)日：2012-04-10

    申请号：US12534087

    申请日：2009-07-31

    申请人： Xiaoye Wu ,  David Allen Langan ,  James Walter LeBlanc ,  Dan Xu

    发明人： Xiaoye Wu ,  David Allen Langan ,  James Walter LeBlanc ,  Dan Xu

    IPC分类号： H05G1/60

    CPC分类号： A61B6/544 ,  A61B6/027 ,  A61B6/032 ,  A61B6/488

    摘要： The present invention discloses a computed tomography imager comprising: an x-ray source disposed in a gantry; a detector assembly for receiving an x-ray emission from an x-ray source, the x-ray source and the detector assembly rotatable about an imaging target; an imager control system for selectively modulating a kVp operating value in the x-ray source during a scan slice in accordance with an x-ray modulation software program; and a computer for receiving data from the detector assembly, and for providing control signals to the imager control system by executing the x-ray modulation software program for at least a portion of the total possible rotational scanning range of the x-ray source.

    摘要翻译： 本发明公开了一种计算机断层成像仪，包括：设置在台架中的x射线源; 用于从X射线源接收x射线发射的检测器组件，所述x射线源和所述检测器组件围绕成像靶旋转; 成像器控制系统，用于根据x射线调制软件程序在扫描切片期间选择性地调制x射线源中的kVp操作值; 以及计算机，用于从检测器组件接收数据，并且通过对X射线源的总可能的旋转扫描范围的至少一部分执行x射线调制软件程序来向成像器控制系统提供控制信号。

    Method and system for correlated noise suppression in dual energy imaging
    8.
    发明授权
    Method and system for correlated noise suppression in dual energy imaging 有权
    双能量成像相关噪声抑制方法与系统

    公开(公告)号：US08401266B2

    公开(公告)日：2013-03-19

    申请号：US12955227

    申请日：2010-11-29

    申请人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu ,  Jed Douglas Pack ,  Andrea Marie Schmitz

    发明人： Dan Xu ,  David Allen Langan ,  Xiaoye Wu ,  Jed Douglas Pack ,  Andrea Marie Schmitz

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T11/008 ,  G06T5/002 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2211/408

    摘要： Methods and systems for correlated noise suppression are presented. The present correlated noise suppression technique estimates a correlation direction between noise values in a first and a second MD image corresponding to a first and a second basis material, respectively. The two MD images are diffused using the estimated correlation direction to generate a first and a second diffused image. Further, first and second noise masks are generated by subtracting the diffused image from the corresponding MD image. Edges in the first and the second MD images are processed with the first and second noise masks, respectively to generate a final first noise mask and a final second noise mask. The first MD image is then processed with the final second noise mask to generate a final first MD image and the second MD image is processed with the final first noise mask to generate a final second MD image.

    摘要翻译： 提出了相关噪声抑制的方法和系统。 本相关噪声抑制技术分别估计与第一和第二基础材料对应的第一和第二MD图像中的噪声值之间的相关方向。 使用估计的相关方向来扩散两个MD图像以生成第一和第二扩散图像。 此外，通过从相应的MD图像中减去漫射图像来产生第一和第二噪声掩码。 第一和第二MD图像中的边缘分别用第一和第二噪声掩模进行处理，以产生最终的第一噪声掩模和最终的第二噪声掩模。 然后用最终的第二噪声掩码处理第一MD图像以产生最终的第一MD图像，并且用最终的第一噪声掩码处理第二MD图像以产生最终的第二MD图像。

    Apparatus and Method for Voltage Modulation in X-Ray Computed Tomography
    9.
    发明申请
    Apparatus and Method for Voltage Modulation in X-Ray Computed Tomography 有权
    X射线计算机断层扫描中电压调制的装置和方法

    公开(公告)号：US20110026668A1

    公开(公告)日：2011-02-03

    申请号：US12534087

    申请日：2009-07-31

    申请人： Xiaoye Wu ,  David Allen Langan ,  James Walter LeBlanc ,  Dan Xu

    发明人： Xiaoye Wu ,  David Allen Langan ,  James Walter LeBlanc ,  Dan Xu

    IPC分类号： H05G1/60

    CPC分类号： A61B6/544 ,  A61B6/027 ,  A61B6/032 ,  A61B6/488

    摘要： The present invention discloses a computed tomography imager comprising: an x-ray source disposed in a gantry; a detector assembly for receiving an x-ray emission from an x-ray source, the x-ray source and the detector assembly rotatable about an imaging target; an imager control system for selectively modulating a kVp operating value in the x-ray source during a scan slice in accordance with an x-ray modulation software program; and a computer for receiving data from the detector assembly, and for providing control signals to the imager control system by executing the x-ray modulation software program for at least a portion of the total possible rotational scanning range of the x-ray source.

    摘要翻译： 本发明公开了一种计算机断层成像仪，包括：设置在台架中的x射线源; 用于从X射线源接收x射线发射的检测器组件，所述x射线源和所述检测器组件围绕成像靶旋转; 成像器控制系统，用于根据x射线调制软件程序在扫描切片期间选择性地调制x射线源中的kVp工作值; 以及计算机，用于从检测器组件接收数据，并且通过对X射线源的总可能的旋转扫描范围的至少一部分执行x射线调制软件程序来向成像器控制系统提供控制信号。

    SYSTEM AND METHOD OF SPECTRAL CALIBRATION AND BASIS MATERIAL DECOMPOSITION FOR X-RAY CT SYSTEMS
    10.
    发明申请
    SYSTEM AND METHOD OF SPECTRAL CALIBRATION AND BASIS MATERIAL DECOMPOSITION FOR X-RAY CT SYSTEMS 有权
    X射线CT系统的光谱校准和基础材料分解系统与方法

    公开(公告)号：US20120069952A1

    公开(公告)日：2012-03-22

    申请号：US12883631

    申请日：2010-09-16

    申请人： Xiaoye Wu ,  Dan Xu ,  Naveen Chandra ,  Zhanyu Ge ,  Jiang Hsieh ,  Daniel David Harrison ,  Mary Sue Kulpins

    发明人： Xiaoye Wu ,  Dan Xu ,  Naveen Chandra ,  Zhanyu Ge ,  Jiang Hsieh ,  Daniel David Harrison ,  Mary Sue Kulpins

    IPC分类号： A61B6/03

    CPC分类号： A61B6/583 ,  A61B6/032 ,  A61B6/482 ,  A61B6/585

    摘要： An imaging system includes an x-ray source that emits a beam of x-rays toward an object, a detector that receives high frequency electromagnetic energy attenuated by the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to compute detector coefficients based on a static low kVp measurement and a static high kVp measurement, capture incident spectra at high and low kVp during fast kVp switching, compute effective X-ray incident spectra at high and low kVp during fast kVp switching using the captured incident spectra, scan a water phantom and normalize the computed detector coefficients to water, adjust the computed effective X-ray incident spectra based on the normalized detector coefficients, compute basis material decomposition functions using the adjusted X-ray incident spectra, and generate one or more basis material density images using the computed basis material decomposition functions.

    摘要翻译： 成像系统包括：x射线源，其朝向物体发射X射线束;接收被物体衰减的高频电磁能的检测器;可操作地连接到检测器的数据采集系统（DAS）;以及计算机 可操作地连接到DAS。 计算机被编程为基于静态低kVp测量和静态高kVp测量来计算检测器系数，在快速kVp切换期间在高和低kVp处捕获入射光谱，在快速kVp期间计算高和低kVp处的有效X射线入射光谱 使用捕获的入射光谱切换，扫描水体模型并将计算的检测器系数归一化为水，基于归一化的检测器系数调整计算的有效X射线入射光谱，使用调整的X射线入射光谱计算基础材料分解函数， 并使用所计算的基础材料分解函数生成一个或多个基础材料密度图像。