System and method of image artifact reduction in fast kVp switching CT
    1.
    发明授权
    System and method of image artifact reduction in fast kVp switching CT 有权
    快速kVp开关CT中图像伪影减少的系统和方法

    公开(公告)号:US08363917B2

    公开(公告)日:2013-01-29

    申请号:US12578886

    申请日:2009-10-14

    IPC分类号: G06K9/00 A61B6/00 H05G1/64

    CPC分类号: G06T11/008 G06T2211/408

    摘要: A CT system includes a generator configured to energize an x-ray source to a first kilovoltage (kVp) and to a second kVp, and a computer that is programmed to acquire a first view dataset with the x-ray source energized to the first kVp and a second view dataset with the x-ray source energized to the second kVp, generate a base correction image using the first view dataset and the second view dataset, and reconstruct a pair of base material images from the first view dataset and from the second view dataset. The computer is also programmed to estimate artifact correlation in the pair of base material images using the base correction image, generate a pair of final base material images and a final monochromatic image, and correct one of the pair of final base material images and the final monochromatic image at a keV value using the estimated artifact correlation.

    摘要翻译: CT系统包括发电机,其被配置为将x射线源激励到第一千伏(kVp)和第二kVp;以及计算机,其被编程为获取第一视图数据集,其中x射线源被激励到第一kVp 以及将x射线源激励到第二kVp的第二视图数据集,使用第一视图数据集和第二视图数据集生成基本校正图像,并且从第一视图数据集和第二视图数据集重构一对基本材料图像 查看数据集。 计算机还被编程为使用基本校正图像来估计一对基础材料图像中的伪像相关性,生成一对最终的基底图像和最终的单色图像,并且校正一对最终基底图像和最终的基底图像中的一个 使用估计的伪像相关性,以keV值的单色图像。

    SYSTEM AND METHOD OF SPECTRAL CALIBRATION AND BASIS MATERIAL DECOMPOSITION FOR X-RAY CT SYSTEMS
    2.
    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

    IPC分类号: A61B6/03

    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
    3.
    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

    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。

    Method and apparatus for image reconstruction using data decomposition for all or portions of the processing flow
    5.
    发明授权
    Method and apparatus for image reconstruction using data decomposition for all or portions of the processing flow 有权
    用于使用数据分解的全部或部分处理流程的图像重建的方法和装置

    公开(公告)号:US07489799B2

    公开(公告)日:2009-02-10

    申请号:US10999347

    申请日:2004-11-30

    IPC分类号: G06K9/00 A61B6/00 A61B5/05

    摘要: A method and apparatus for processing raw image data to create processed images. Raw image data is acquired. The raw image data is decomposed by a data decomposer into N subsets of raw image data. The number N is based on a number of available image generation processors. The N subsets of raw image data are processed by at least one image generation processor to create processed image data. If more than one image generation processor is available, the image generation processors perform image processing on the raw image data in parallel with respect to each other.

    摘要翻译: 一种用于处理原始图像数据以创建经处理的图像的方法和装置。 获取原始图像数据。 原始图像数据由数据分解器分解成原始图像数据的N个子集。 数字N基于许多可用的图像生成处理器。 原始图像数据的N个子集由至少一个图像生成处理器处理以产生经处理的图像数据。 如果多于一个图像生成处理器可用,则图像生成处理器相对于彼此并行地对原始图像数据进行图像处理。

    Method and apparatus for image reconstruction using data decomposition for all or portions of the processing flow
    6.
    发明授权
    Method and apparatus for image reconstruction using data decomposition for all or portions of the processing flow 有权
    用于使用数据分解的全部或部分处理流程的图像重建的方法和装置

    公开(公告)号:US07684589B2

    公开(公告)日:2010-03-23

    申请号:US12367627

    申请日:2009-02-09

    IPC分类号: G06K9/00 A61B6/00 A61B5/05

    摘要: A method and apparatus for processing raw image data to create processed images. Raw image data is acquired. The raw image data is decomposed by a data decomposer into N subsets of raw image data. The number N is based on a number of available image generation processors. The N subsets of raw image data are processed by at least one image generation processor to create processed image data. If more than one image generation processor is available, the image generation processors perform image processing on the raw image data in parallel with respect to each other.

    摘要翻译: 一种用于处理原始图像数据以创建经处理的图像的方法和装置。 获取原始图像数据。 原始图像数据由数据分解器分解成原始图像数据的N个子集。 数字N基于许多可用的图像生成处理器。 原始图像数据的N个子集由至少一个图像生成处理器处理以创建经处理的图像数据。 如果多于一个图像生成处理器可用,则图像生成处理器相对于彼此并行地对原始图像数据进行图像处理。

    Noise reduction method for dual-energy imaging
    8.
    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

    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
    9.
    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

    IPC分类号: A61B6/00 H05G1/64 G06K9/00

    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。

    SYSTEM AND METHOD OF IMAGE ARTIFACT REDUCTION IN FAST KVP SWITCHING CT
    10.
    发明申请
    SYSTEM AND METHOD OF IMAGE ARTIFACT REDUCTION IN FAST KVP SWITCHING CT 有权
    快速KVP切换CT图像缩小的系统和方法

    公开(公告)号:US20110085719A1

    公开(公告)日:2011-04-14

    申请号:US12578886

    申请日:2009-10-14

    IPC分类号: G06K9/00 H05G1/60

    CPC分类号: G06T11/008 G06T2211/408

    摘要: A CT system includes a generator configured to energize an x-ray source to a first kilovoltage (kVp) and to a second kVp, and a computer that is programmed to acquire a first view dataset with the x-ray source energized to the first kVp and a second view dataset with the x-ray source energized to the second kVp, generate a base correction image using the first view dataset and the second view dataset, and reconstruct a pair of base material images from the first view dataset and from the second view dataset. The computer is also programmed to estimate artifact correlation in the pair of base material images using the base correction image, generate a pair of final base material images and a final monochromatic image, and correct one of the pair of final base material images and the final monochromatic image at a keV value using the estimated artifact correlation.

    摘要翻译: CT系统包括发电机,其被配置为将x射线源激励到第一千伏(kVp)和第二kVp;以及计算机,其被编程为获取第一视图数据集,其中x射线源被激励到第一kVp 以及将x射线源激励到第二kVp的第二视图数据集,使用第一视图数据集和第二视图数据集生成基本校正图像,并且从第一视图数据集和第二视图数据集重构一对基本材料图像 查看数据集。 计算机还被编程为使用基本校正图像来估计一对基础材料图像中的伪像相关性,生成一对最终的基底图像和最终的单色图像,并且校正一对最终基底图像和最终的基底图像中的一个 使用估计的伪像相关性,以keV值的单色图像。