ANODE TARGET FOR AN X-RAY TUBE AND METHOD FOR CONTROLLING THE X-RAY TUBE
    21.
    发明申请
    ANODE TARGET FOR AN X-RAY TUBE AND METHOD FOR CONTROLLING THE X-RAY TUBE 有权
    用于X射线管的阳极靶和用于控制X射线管的方法

    公开(公告)号:US20120163530A1

    公开(公告)日:2012-06-28

    申请号:US12976950

    申请日:2010-12-22

    IPC分类号: A61B6/03 H01J35/00 H01J35/30

    摘要: Anode targets for an x-ray tube and methods for controlling x-ray tubes for x-ray systems are provided. One x-ray system includes a field-generator configured to generate a field, an electron beam generator configured to generate an electron beam directed towards a target and a voltage controller configured to control the electron beam generator to produce an electron beam at a first energy level and an electron beam at a second energy level. The x-ray system also includes a field-generator controller configured to control a field to deflect at least one of the electron beams, wherein the electron beam, at the first energy level, impinges on the target at a first contact position and the electron beam, at the second energy level, impinges on the target at a second contact position. The at the first contact position and at the second contact position is configured to filter x-rays.

    摘要翻译: 阳极靶向X射线管,并提供了用于控制x射线系统的X射线管的方法。 一个x射线系统包括被配置为产生场的场发生器,被配置为产生朝向目标的电子束的电子束发生器和被配置为控制电子束发生器以产生第一能量的电子束的电压控制器 电平和电子束处于第二能级。 x射线系统还包括场发生器控制器,其被配置为控制场以偏转至少一个电子束,其中在第一能级处的电子束在第一接触位置撞击靶,并且电子 在第二能量水平处的光束在第二接触位置处撞击在目标上。 在第一接触位置处和在第二接触位置处被配置为过滤x射线。

    Asymmetric de-populated detector for computed tomography and method of making same
    22.
    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。

    ASYMMETRIC DE-POPULATED DETECTOR FOR COMPUTED TOMOGRAPHY AND METHOD OF MAKING SAME
    23.
    发明申请
    ASYMMETRIC DE-POPULATED DETECTOR FOR COMPUTED TOMOGRAPHY AND METHOD OF MAKING SAME 有权
    用于计算机图像的不对称去除检测器及其制造方法

    公开(公告)号:US20120014502A1

    公开(公告)日:2012-01-19

    申请号:US12837035

    申请日:2010-07-15

    IPC分类号: A61B6/03 H05K13/00

    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。

    Method and apparatus for correcting for beam hardening in CT images
    24.
    发明授权
    Method and apparatus for correcting for beam hardening in CT images 失效
    用于校正CT图像中的束硬化的方法和装置

    公开(公告)号:US07391844B2

    公开(公告)日:2008-06-24

    申请号:US11036618

    申请日:2005-01-14

    IPC分类号: A61B6/00

    摘要: A method for determining a correction for beam hardening in CT images includes obtaining air scans at a plurality of kVp's, determining detection efficiencies for detector elements of the CT imaging apparatus, and estimating projection values through a combination of at least two different materials of different thicknesses. The method further includes determining a transfer function that translates the estimated projection values into ideal projection values for at least two of the different materials and storing the transfer function as the beam hardening correction for images of the CT imaging apparatus.

    摘要翻译: 用于确定CT图像中的束硬化校正的方法包括以多个kVp获得空气扫描,确定CT成像装置的检测器元件的检测效率,以及通过组合至少两种不同厚度的不同厚度的材料来估计投影值 。 该方法还包括确定将估计的投影值转换为不同材料中的至少两种的理想投影值并将传递函数存储为CT成像装置的图像的束硬化校正的传递函数。

    Methods for spectrally calibrating CT imaging apparatus detectors
    25.
    发明授权
    Methods for spectrally calibrating CT imaging apparatus detectors 有权
    频谱校准CT成像装置检测器的方法

    公开(公告)号:US07086780B2

    公开(公告)日:2006-08-08

    申请号:US10850009

    申请日:2004-05-20

    IPC分类号: G01D18/00

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

    摘要: A method for calibrating a computed tomographic imaging apparatus having a gantry, a radiation source operable at a plurality of kVp's, and a detector array having a plurality of detector elements includes using a system detection function to estimate signals of each detector element that would have been detected through air and through a given thickness of water to determine estimated datasets. The estimated datasets are used to determine data pair sets each comprising a normalized water projection value and an ideal projection value for each detector element. The method further includes determining and storing a representation of a mapping function of the normalized water projections values to the ideal projection values in a memory of the computed tomographic imaging apparatus as a spectral calibration of the computed tomographic imaging apparatus.

    摘要翻译: 一种用于校准具有台架的计算机断层成像设备的方法,可在多个kVp处操作的辐射源以及具有多个检测器元件的检测器阵列的方法包括使用系统检测功能来估计已经被检测到的每个检测器元件的信号 通过空气和通过给定厚度的水检测以确定估计的数据集。 估计的数据集用于确定每个包括每个检测器元件的归一化水投影值和理想投影值的数据对集合。 该方法还包括将计算机断层成像设备的存储器中的归一化水投影值的映射函数的映射函数确定和存储为理想投影值,作为计算机断层成像设备的光谱校准。

    CT spectral calibration
    26.
    发明授权
    CT spectral calibration 有权
    CT光谱校准

    公开(公告)号:US08611627B2

    公开(公告)日:2013-12-17

    申请号:US12976785

    申请日:2010-12-22

    IPC分类号: G06K9/00

    摘要: The present disclosure relates to the performing spectral calibration of a CT imaging system. In accordance with certain embodiments, spectral calibration phantoms are scanned while positioned on a table in the imaging volume of the CT imaging system. The scans of the calibration phantoms, in conjunction with air sans performed on the CT imaging system, are used to derive information about the deviation of the measured phantom scans from an ideal. The deviation information is in turn used to derive spectral calibration vectors that may be used with the CT imaging system.

    摘要翻译: 本公开涉及执行CT成像系统的光谱校准。 根据某些实施例,在定位在CT成像系统的成像体积的台上的同时扫描光谱校准模体。 校准模型的扫描结合在CT成像系统上执行的空气,用于得到关于测量的幻影扫描与理想的偏差的信息。 偏差信息又用于导出可与CT成像系统一起使用的光谱校准矢量。

    System and method of acquiring multi-energy CT imaging data
    28.
    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:US08363779B2

    公开(公告)日:2013-01-29

    申请号:US13484707

    申请日:2012-05-31

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

    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。

    Method and system for image data acquisition
    29.
    发明授权
    Method and system for image data acquisition 有权
    图像数据采集方法和系统

    公开(公告)号:US08160200B2

    公开(公告)日:2012-04-17

    申请号:US12750050

    申请日:2010-03-30

    IPC分类号: H05G1/26

    摘要: A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.

    摘要翻译: 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先,可以获取与对象相对应的初步图像数据。 此外,可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地,可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后,可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。

    System and method of data interpolation in fast kVp switching dual energy CT
    30.
    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

    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, 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。