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    Method and apparatus for performing dual-spectrum CT with fast KV modulation at multiple-view intervals
    4.
    发明授权
    Method and apparatus for performing dual-spectrum CT with fast KV modulation at multiple-view intervals 有权
    用于以多视角间隔执行快速KV调制的双光谱CT的方法和装置

    公开(公告)号：US07813474B2

    公开(公告)日：2010-10-12

    申请号：US11869097

    申请日：2007-10-09

    申请人： Xiaoye Wu ,  James W. LeBlanc ,  Paavana Sainath ,  Thomas John Myers ,  Charles Hugh Shaughnessy ,  Uwe Wiedmann

    发明人： Xiaoye Wu ,  James W. LeBlanc ,  Paavana Sainath ,  Thomas John Myers ,  Charles Hugh Shaughnessy ,  Uwe Wiedmann

    IPC分类号： H05G1/60 ,  H05G1/32 ,  A61B6/03

    CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482

    摘要： A CT system includes a rotatable gantry having an opening for receiving a subject to be scanned, a rotatable gantry having an opening for receiving a subject to be scanned, an x-ray source configured to project x-rays having multiple energies toward the subject, and a generator configured to energize the x-ray source to a first voltage and configured to energize the x-ray source to a second voltage, the first voltage distinct from the second voltage. The system further includes a controller configured to cause the generator to energize the x-ray source to the first voltage for a first duration, acquire imaging data for at least one view during at least the first duration, after the first duration, cause the generator to energize the x-ray source to the second voltage for a second duration, and acquire imaging data for two or more views during at least the second duration.

    摘要翻译： CT系统包括具有用于接收待扫描的被摄体的开口的可旋转台架，具有用于接收待扫描的被摄体的开口的可旋转机架;被配置为将具有多个能量的x射线投射到被摄体的X射线源， 以及发生器，其被配置为将所述x射线源激励到第一电压并且被配置为将所述x射线源激励到第二电压，所述第一电压不同于所述第二电压。 该系统还包括控制器，该控制器被配置为使得发生器在第一持续时间内，在至少第一持续时间内，在第一持续时间之后，将x射线源激励到第一电压，从而在第一持续时间之后，获得用于至少一个视图的成像数据， 以将X射线源激励到第二电压持续第二持续时间，并且在至少第二持续时间内获取用于两个或更多个视图的成像数据。

    METHOD AND APPARATUS FOR PERFORMING DUAL-SPECTRUM CT WITH FAST KV MODULATION AT MULTIPLE-VIEW INTERVALS
    6.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING DUAL-SPECTRUM CT WITH FAST KV MODULATION AT MULTIPLE-VIEW INTERVALS 有权
    用于在多视图间隔进行快速KV调制执行双光谱CT的方法和装置

    公开(公告)号：US20090092219A1

    公开(公告)日：2009-04-09

    申请号：US11869097

    申请日：2007-10-09

    申请人： Xiaoye Wu ,  James W. LeBlanc ,  Paavana Sainath ,  Thomas John Myers ,  Charles Hugh Shaughnessy ,  Uwe Wiedmann

    发明人： Xiaoye Wu ,  James W. LeBlanc ,  Paavana Sainath ,  Thomas John Myers ,  Charles Hugh Shaughnessy ,  Uwe Wiedmann

    IPC分类号： H05G1/60

    CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482

    摘要： A CT system includes a rotatable gantry having an opening for receiving a subject to be scanned, a rotatable gantry having an opening for receiving a subject to be scanned, an x-ray source configured to project x-rays having multiple energies toward the subject, and a generator configured to energize the x-ray source to a first voltage and configured to energize the x-ray source to a second voltage, the first voltage distinct from the second voltage. The system further includes a controller configured to cause the generator to energize the x-ray source to the first voltage for a first duration, acquire imaging data for at least one view during at least the first duration, after the first duration, cause the generator to energize the x-ray source to the second voltage for a second duration, and acquire imaging data for two or more views during at least the second duration.

    摘要翻译： CT系统包括具有用于接收待扫描的被摄体的开口的可旋转台架，具有用于接收待扫描的被摄体的开口的可旋转机架;被配置为将具有多个能量的x射线投射到被摄体的X射线源， 以及发生器，其被配置为将所述x射线源激励到第一电压并且被配置为将所述x射线源激励到第二电压，所述第一电压不同于所述第二电压。 该系统还包括控制器，该控制器被配置为使得发生器在第一持续时间内，在至少第一持续时间内，在第一持续时间之后，将x射线源激励到第一电压，从而在第一持续时间之后，获得用于至少一个视图的成像数据， 以将X射线源激励到第二电压持续第二持续时间，并且在至少第二持续时间内获取用于两个或更多个视图的成像数据。

    SYSTEM AND METHOD OF SPECTRAL CALIBRATION AND BASIS MATERIAL DECOMPOSITION FOR X-RAY CT SYSTEMS
    7.
    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。

    NOISE REDUCTION METHOD FOR DUAL-ENERGY IMAGING
    8.
    发明申请
    NOISE REDUCTION METHOD FOR DUAL-ENERGY IMAGING 有权
    用于双能量成像的噪声减少方法

    公开(公告)号：US20110158498A1

    公开(公告)日：2011-06-30

    申请号：US12650116

    申请日：2009-12-30

    申请人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    发明人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    IPC分类号： G06K9/62

    CPC分类号： G06T11/008 ,  G06T2211/408

    摘要： A method is provided that includes acquiring a first set of image data from X-rays produced at a first energy level and a second set of image data from X-rays produced at a second energy level. The method includes generating a first noise mask for a first basis material and a second noise mask for a second basis material and removing pixels corresponding to cross contaminating structural information from the first noise mask and the second noise mask. The method includes processing a first materially decomposed image generated from the first set of image data and the second set of digital data using the second noise mask after removal of the cross contaminating structural information and processing a second MD image generated from the first set of image data and the second set of digital data using the first noise mask after removal of the cross contaminating structural information.

    摘要翻译： 提供了一种方法，其包括从在第二能量级产生的X射线以从第一能量级产生的X射线和第二组图像数据获取第一组图像数据。 该方法包括为第一基材生成第一噪声掩模和第二基材的第二噪声掩模，并从第一噪声掩模和第二噪声掩模去除对应于交叉污染结构信息的像素。 该方法包括在去除交叉污染的结构信息之后处理从第一组图像数据和第二组数字数据生成的第一物理分解图像，并且处理从第一组图像生成的第二MD图像 数据和第二组数字数据，在去除交叉污染结构信息之后使用第一噪声掩模。

    Noise reduction method for dual-energy imaging
    9.
    发明授权
    Noise reduction method for dual-energy imaging 有权
    双能量成像降噪方法

    公开(公告)号：US08396273B2

    公开(公告)日：2013-03-12

    申请号：US12650116

    申请日：2009-12-30

    申请人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    发明人： Baojun Li ,  Naveen Stephan Chandra ,  Jed Douglas Pack ,  Jiang Hsieh ,  Xiaoye Wu ,  Mary Sue Kulpins

    IPC分类号： G06K9/00

    CPC分类号： G06T11/008 ,  G06T2211/408

    摘要： A method is provided that includes acquiring a first set of image data from X-rays produced at a first energy level and a second set of image data from X-rays produced at a second energy level. The method includes generating a first noise mask for a first basis material and a second noise mask for a second basis material and removing pixels corresponding to cross contaminating structural information from the first noise mask and the second noise mask. The method includes processing a first materially decomposed image generated from the first set of image data and the second set of digital data using the second noise mask after removal of the cross contaminating structural information and processing a second MD image generated from the first set of image data and the second set of digital data using the first noise mask after removal of the cross contaminating structural information.

    摘要翻译： 提供了一种方法，其包括从在第二能量级产生的X射线以从第一能量级产生的X射线和第二组图像数据获取第一组图像数据。 该方法包括为第一基材生成第一噪声掩模和第二基材的第二噪声掩模，并从第一噪声掩模和第二噪声掩模去除对应于交叉污染结构信息的像素。 该方法包括在去除交叉污染的结构信息之后处理从第一组图像数据和第二组数字数据生成的第一物理分解图像，并且处理从第一组图像生成的第二MD图像 数据和第二组数字数据，在去除交叉污染结构信息之后使用第一噪声掩模。

    System and method of spectral calibration and basis material decomposition for X-ray CT systems
    10.
    发明授权
    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材分解的系统和方法

    公开(公告)号：US08315352B2

    公开(公告)日：2012-11-20

    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： A61B6/00 ,  H05G1/64 ,  G06K9/00

    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。