NOISE REDUCTION METHOD FOR DUAL-ENERGY IMAGING
    32.
    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 adaptive scatter correction
    33.
    发明授权
    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:US09320477B2

    公开(公告)日:2016-04-26

    申请号:US13223803

    申请日:2011-09-01

    IPC分类号: A61B6/03 A61B6/00

    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。

    Noise reduction method for dual-energy imaging
    34.
    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。

    METHOD AND SYSTEM FOR SCATTER CORRECTION IN X-RAY IMAGING
    35.
    发明申请
    METHOD AND SYSTEM FOR SCATTER CORRECTION IN X-RAY IMAGING 有权
    X射线成像中散射校正的方法和系统

    公开(公告)号:US20130004050A1

    公开(公告)日:2013-01-03

    申请号:US13174480

    申请日:2011-06-30

    IPC分类号: G06K9/00

    摘要: Approaches for deriving scatter information using inverse tracking of scattered X-rays is disclosed. In certain embodiments scattered rays are tracked from respective locations on a detector to a source of the X-ray radiation, as opposed to tracking schemes that proceed from the source to the detector. In one such approach, the inverse tracking is implemented using a density integrated volume that reduces the integration steps performed.

    摘要翻译: 公开了使用散射X射线的反向跟踪导出散射信息的方法。 在某些实施例中,与从源到检测器进行的跟踪方案相反,散射光线从检测器上的相应位置跟踪到X射线辐射源。 在一种这样的方法中,使用密度集成体积来实现逆追踪,其减少执行的集成步骤。

    SYSTEM AND METHOD OF ACQUIRING MULTI-ENERGY CT IMAGING DATA
    36.
    发明申请
    SYSTEM AND METHOD OF ACQUIRING MULTI-ENERGY CT IMAGING DATA 有权
    获取多能CT成像数据的系统和方法

    公开(公告)号:US20120236984A1

    公开(公告)日:2012-09-20

    申请号:US13484707

    申请日:2012-05-31

    IPC分类号: A61B6/03

    摘要: A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller. The controller is configured to apply a first kVp for a first time period, apply a second kVp for a second time period, integrate two or more view datasets during the first time period, integrate one or more view datasets during the second time period, and generate an image using the datasets integrated during the first time period and during the second time period.

    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和控制器。 控制器被配置为在第一时间段内施加第一kVp,在第二时间段施加第二kVp,在第一时间段期间集成两个或更多个视图数据集,在第二时间段期间集成一个或多个视图数据集;以及 使用在第一时间段期间和第二时间段期间集成的数据集生成图像。

    SYSTEM AND METHOD OF MITIGATING LOW SIGNAL DATA FOR DUAL ENERGY CT
    37.
    发明申请
    SYSTEM AND METHOD OF MITIGATING LOW SIGNAL DATA FOR DUAL ENERGY CT 有权
    减轻双能量CT信号数据的系统和方法

    公开(公告)号:US20110142312A1

    公开(公告)日:2011-06-16

    申请号:US12635901

    申请日:2009-12-11

    IPC分类号: G06K9/00 H05G1/60

    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。

    Method and system for scatter correction in X-ray imaging
    38.
    发明授权
    Method and system for scatter correction in X-ray imaging 有权
    X射线成像中散射校正的方法和系统

    公开(公告)号:US08483471B2

    公开(公告)日:2013-07-09

    申请号:US13174480

    申请日:2011-06-30

    IPC分类号: G06K9/00

    摘要: Approaches for deriving scatter information using inverse tracking of scattered X-rays is disclosed. In certain embodiments scattered rays are tracked from respective locations on a detector to a source of the X-ray radiation, as opposed to tracking schemes that proceed from the source to the detector. In one such approach, the inverse tracking is implemented using a density integrated volume that reduces the integration steps performed.

    摘要翻译: 公开了使用散射X射线的反向跟踪导出散射信息的方法。 在某些实施例中,与从源到检测器进行的跟踪方案相反,散射光线从检测器上的相应位置跟踪到X射线辐射源。 在一种这样的方法中,使用密度集成体积来实现逆追踪,其减少执行的集成步骤。

    System and method of acquiring multi-energy CT imaging data
    39.
    发明授权
    System and method of acquiring multi-energy CT imaging data 有权
    获取多能CT成像数据的系统和方法

    公开(公告)号:US08199875B2

    公开(公告)日:2012-06-12

    申请号:US12760862

    申请日:2010-04-15

    IPC分类号: A61B6/00

    摘要: A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller configured to apply a first kVp for a first time period, apply a second kVp for a second time period, wherein the second time period is different from the first time period, acquire a first asymmetric view dataset during at least a portion of the first time period, acquire a second asymmetric view dataset during at least a portion of the second time period, and generate an image using the acquired first and second asymmetric view datasets.

    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,以及被配置为在第一时间段施加第一kVp的控制器,在第二时间段施加第二kVp,其中第二时间段是不同的 从所述第一时间段在所述第一时间段的至少一部分期间获取第一非对称视图数据集,在所述第二时间段的至少一部分期间获取第二非对称视图数据集,并且使用所获取的第一和第二时间段生成图像 非对称视图数据集。

    Asymmetric de-populated detector for computed tomography and method of making same
    40.
    发明授权
    Asymmetric de-populated detector for computed tomography and method of making same 有权
    用于计算机断层扫描的不对称解除检测器及其制造方法

    公开(公告)号:US08155265B2

    公开(公告)日:2012-04-10

    申请号:US12837035

    申请日:2010-07-15

    IPC分类号: A61B6/03

    摘要: A computed tomography (CT) detector array includes a central region substantially symmetric about a central axis thereof and includes a first plurality of x-ray detector cells configured to acquire CT data from a first number of detector rows during a scan, wherein the central axis is in a channel direction of the CT detector array and transverse to a slice direction of the CT detector array. A first wing is coupled to a first side of the central region, and a second wing is coupled to a second side of the central region opposite the first side. The first and second wings include respective second and third pluralities of x-ray detector cells and are each configured to acquire CT data from a number of detector rows that is less than the first number of detector rows. The CT detector array is asymmetric about the central axis of the central region.

    摘要翻译: 计算机断层摄影(CT)检测器阵列包括围绕其中心轴基本对称的中心区域,并且包括第一多个x射线检测器单元,其被配置为在扫描期间从第一数量的检测器行获取CT数据,其中中心轴 在CT检测器阵列的通道方向上并且横向于CT检测器阵列的切片方向。 第一翼连接到中心区域的第一侧,第二翼连接到与第一侧相对的中心区域的第二侧。 第一和第二翼包括相应的第二和第三多个X射线检测器单元,并且各自被配置为从小于第一数量的检测器行的多个检测器行获取CT数据。 CT检测器阵列关于中心区域的中心轴线是不对称的。