METHOD AND APPARATUS FOR STATISTICAL ITERATIVE RECONSTRUCTION
    142.
    发明申请
    METHOD AND APPARATUS FOR STATISTICAL ITERATIVE RECONSTRUCTION 有权
    用于统计迭代重建的方法和装置

    公开(公告)号:US20130121553A1

    公开(公告)日:2013-05-16

    申请号:US13298243

    申请日:2011-11-16

    IPC分类号: G06K9/36

    摘要: Methods and apparatus for statistical iterative reconstruction are provided. One method includes pre-processing acquired raw measurement data to modify the raw data measurement data and determining a change in a variance of the raw measurement data resulting from the modification to the raw measurement data during pre-processing. The method also includes reconstructing an image using the modified raw measurement data resulting from the pre-processing and the determined change in variance.

    摘要翻译: 提供了统计学迭代重建的方法和装置。 一种方法包括预处理获取的原始测量数据以修改原始数据测量数据,并且确定在预处理期间对原始测量数据的修改导致的原始测量数据的方差变化。 该方法还包括使用由预处理产生的修改的原始测量数据和所确定的方差变化来重建图像。

    METHOD AND APPARATUS FOR ADAPTIVE SCATTER CORRECTION
    143.
    发明申请
    METHOD AND APPARATUS FOR ADAPTIVE SCATTER CORRECTION 有权
    自适应散射校正的方法和装置

    公开(公告)号:US20130058450A1

    公开(公告)日:2013-03-07

    申请号:US13223803

    申请日:2011-09-01

    IPC分类号: A61B6/03

    摘要: A CT system includes a rotatable gantry having an opening to receive an object to be scanned, an x-ray source configured to project an x-ray beam toward the object having a primary intensity, a detector configured to detect high frequency electromagnetic energy passing through the object and output imaging data, and a data acquisition system (DAS) connected to the detector and configured to receive the imaging data. The system also includes a computer programmed to obtain image projection data of the object from the DAS, correct the projection data using a scatter function that is based at least on a known characteristic of the x-ray beam, and generate images using the corrected projection data.

    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,被配置为将X射线束投影到具有主要强度的物体的X射线源;检测器,被配置为检测经过的高频电磁能 物体和输出成像数据,以及连接到检测器并被配置为接收成像数据的数据采集系统(DAS)。 该系统还包括被编程为从DAS获得对象的图像投影数据的计算机,使用至少基于X射线束的已知特征的散射函数校正投影数据,并使用校正的投影产生图像 数据。

    System and method of image artifact reduction in fast kVp switching CT
    144.
    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 prior image constrained image reconstruction using short scan image data and objective function minimization
    145.
    发明授权
    System and method of prior image constrained image reconstruction using short scan image data and objective function minimization 有权
    使用短扫描图像数据和目标函数最小化的先前图像约束图像重构的系统和方法

    公开(公告)号:US08315353B1

    公开(公告)日:2012-11-20

    申请号:US13493051

    申请日:2012-06-11

    IPC分类号: A61B6/00 G06K9/00

    摘要: A computerized tomographic system configured to acquire short scan data of an object within a single revolution of a detector array about the object over a first angular range of rotation of the detector array about the object, define a temporal subset of the acquired short scan data over a second angular range of rotation of the detector that is less than the first angular range of rotation, generate a mathematical function that is based on the acquired short scan data and the defined temporal subset of data, minimize the mathematical function, and generate an image of the object using the minimized mathematical function and the data acquired over the second angular range of rotation of the detector.

    摘要翻译: 计算机断层摄影系统被配置为在关于物体的检测器阵列的旋转的第一角度范围内获取关于物体的检测器阵列的一圈内的物体的短扫描数据,定义所获取的短扫描数据的时间子集 检测器的第二角度旋转范围小于第一角度旋转范围,产生基于所获取的短扫描数据和定义的数据时间子集的数学函数,使数学函数最小化并生成图像 使用最小化的数学函数和在检测器的旋转的第二角度范围内获取的数据。

    METHODS AND APPARATUS FOR CT SMOOTHING TO REDUCE ARTIFACTS
    146.
    发明申请
    METHODS AND APPARATUS FOR CT SMOOTHING TO REDUCE ARTIFACTS 审中-公开
    CT扫描减少手术的方法和设备

    公开(公告)号:US20120275561A1

    公开(公告)日:2012-11-01

    申请号:US13545743

    申请日:2012-07-10

    IPC分类号: G06K9/44 H05G1/60

    摘要: A method for reconstructing an image of an object includes scanning an object using a computed tomographic (CT) imaging apparatus to acquire projections of the object. A set of thresholds are determined utilizing the projections, and selected smoothing kernels are associated with the thresholds. The method further includes utilizing the smoothing kernels and the projections to produce smoothed projections in accordance with the thresholds and filtering and backprojecting the smoothed projections to generate an image of the object.

    摘要翻译: 用于重建对象的图像的方法包括使用计算机断层摄影(CT)成像设备扫描对象以获取对象的投影。 使用投影来确定一组阈值,并且所选择的平滑内核与阈值相关联。 该方法还包括利用平滑内核和投影来根据阈值产生平滑的投影,并过滤和反投影平滑的投影以生成对象的图像。

    System and method of mitigating low signal data for dual energy CT
    149.
    发明授权
    System and method of mitigating low signal data for dual energy CT 有权
    减轻双能量CT的低信号数据的系统和方法

    公开(公告)号:US08199874B2

    公开(公告)日:2012-06-12

    申请号:US12635901

    申请日:2009-12-11

    IPC分类号: A61B6/00 H05G1/64

    摘要: A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller configured to obtain kVp projection data at a first kVp, obtain kVp projection data at a second kVp, extract data from the kVp projection data obtained at the second kVp, add the extracted data to the kVp projection data obtained at the first kVp to generate mitigated projection data at the first kVp, and generate an image using the mitigated projection data at the first kVp and using the projection data obtained at the second kVp.

    摘要翻译: CT系统包括具有用于接收待扫描物体的开口的可旋转机架,以及控制器,被配置为在第一kVp处获得kVp投影数据,在第二kVp处获得kVp投影数据,从在 第二kVp,将提取的数据加到在第一kVp处获得的kVp投影数据,以在第一kVp处产生减轻的投影数据,并使用第一kVp处的减轻投影数据并使用在第二kVp获得的投影数据生成图像 kVp。