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105 条记录 (耗时 0.075 秒)

    ASYMMETRIC DE-POPULATED DETECTOR FOR COMPUTED TOMOGRAPHY AND METHOD OF MAKING SAME
    41.
    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

    申请人： Bruno Kristiaan Bernard De Man ,  Abdelaziz Ikhlef ,  Jiang Hsieh ,  Jeffrey Alan Kautzer ,  Robert F. Senzig ,  Paavana Sainath ,  Xiaoye Wu ,  Jed Douglas Pack

    发明人： Bruno Kristiaan Bernard De Man ,  Abdelaziz Ikhlef ,  Jiang Hsieh ,  Jeffrey Alan Kautzer ,  Robert F. Senzig ,  Paavana Sainath ,  Xiaoye Wu ,  Jed Douglas Pack

    IPC分类号： A61B6/03 ,  H05K13/00

    CPC分类号： A61B6/032 ,  A61B6/4208 ,  G01T1/2985 ,  Y10T29/49002

    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。

    Anode target for an x-ray tube and method for controlling the x-ray tube
    42.
    发明授权
    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：US08483361B2

    公开(公告)日：2013-07-09

    申请号：US12976950

    申请日：2010-12-22

    申请人： Paavana Sainath ,  Xiaoye Wu ,  Girijesh K. Yadava

    发明人： Paavana Sainath ,  Xiaoye Wu ,  Girijesh K. Yadava

    IPC分类号： H01J35/30

    CPC分类号： H01J35/10 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4028 ,  A61B6/4078 ,  A61B6/4233 ,  A61B6/482 ,  H01J35/14 ,  H01J2235/081 ,  H01J2235/086

    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。

    System and method of fast KVP switching for dual energy CT
    46.
    发明授权
    System and method of fast KVP switching for dual energy CT 有权
    双能CT快速KVP开关系统及方法

    公开(公告)号：US07792241B2

    公开(公告)日：2010-09-07

    申请号：US12257658

    申请日：2008-10-24

    申请人： Xiaoye Wu ,  David Langan ,  Colin R. Wilson ,  Yun Zou

    发明人： Xiaoye Wu ,  David Langan ,  Colin R. Wilson ,  Yun Zou

    IPC分类号： A61B6/00

    CPC分类号： H01J35/06 ,  H01J35/045 ,  H01J2235/068

    摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned and an x-ray source coupled to the gantry and configured to project x-rays through the opening. The x-ray source includes a target, a first cathode configured to emit a first beam of electrons toward the target, a first gridding electrode coupled to the first cathode, a second cathode configured to emit a second beam of electrons toward the target, and a second gridding electrode coupled to the second cathode. The system includes a generator configured to energize the first cathode to a first kVp and to energize the second cathode to a second kVp, and a detector attached to the gantry and positioned to receive x-rays that pass through the opening. The system also includes a controller configured to apply a gridding voltage to the first gridding electrode to block emission of the first beam of electrons toward the target, apply the gridding voltage to the second gridding electrode to block emission of the second beam of electrons toward the target, and acquire dual energy imaging data from the detector.

    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和耦合到台架的x射线源，并且被配置成通过开口投影X射线。 x射线源包括目标，被配置为朝向目标发射第一电子束的第一阴极，耦合到第一阴极的第一网格电极，被配置为向靶发射第二电子束的第二阴极，以及 耦合到第二阴极的第二栅电极。 该系统包括发电机，其被配置为将第一阴极激励到第一kVp并且将第二阴极激励到第二kVp，以及附接到台架并被定位成接收穿过开口的x射线的检测器。 该系统还包括：控制器，被配置为向第一格栅电极施加网格化电压，以阻止第一电子束朝向目标的发射，将网格化电压施加到第二格栅电极，以阻止第二电子束朝向 目标，并从检测器获取双能量成像数据。

    Photon counting x-ray detector with overrange logic control
    47.
    发明授权
    Photon counting x-ray detector with overrange logic control 有权
    光子计数x射线探测器与超量程逻辑控制

    公开(公告)号：US07606347B2

    公开(公告)日：2009-10-20

    申请号：US11744292

    申请日：2007-05-04

    申请人： John Eric Tkaczyk ,  Jonathan D. Short ,  James Wilson Rose ,  Xiaoye Wu ,  Samit Kumar Basu

    发明人： John Eric Tkaczyk ,  Jonathan D. Short ,  James Wilson Rose ,  Xiaoye Wu ,  Samit Kumar Basu

    IPC分类号： A61B6/03

    CPC分类号： A61B6/5205 ,  A61B6/032 ,  A61B6/4291 ,  G01T1/2018 ,  G01T1/242 ,  G01T1/243 ,  G01T1/249

    摘要： A CT detector includes a first detector configured to convert radiographic energy to electrical signals representative of energy sensitive radiographic data and a second detector configured to convert radiographic energy to electrical signals representative of energy sensitive radiographic data and positioned to receive x-rays that pass through the first detector. A logic controller is electrically connected to the first detector and the second detector and is configured to receive a logic output signal from the second detector indicative of an amount of a saturation level of the first detector, compare the logic output signal to a threshold value, and output, based on the comparison, electrical signals from the first detector, the second detector, or a combination thereof to an image chain.

    摘要翻译： CT检测器包括：第一检测器，其被配置为将射线照相能量转换成表示能量敏感射线照相数据的电信号;以及第二检测器，被配置为将放射线照相能量转换成表示能量敏感射线照相数据的电信号，并被定位成接收穿过 第一检测器 逻辑控制器电连接到第一检测器和第二检测器，并且被配置为从第二检测器接收指示第一检测器的饱和电平的量的逻辑输出信号，将逻辑输出信号与阈值进行比较， 并且基于比较将来自第一检测器，第二检测器或其组合的电信号输出到图像链。

    METHOD FOR CALIBRATING A DUAL -SPECTRAL COMPUTED TOMOGRAPHY (CT) SYSTEM
    48.
    发明申请
    METHOD FOR CALIBRATING A DUAL -SPECTRAL COMPUTED TOMOGRAPHY (CT) SYSTEM 有权
    用于校准双重计算机图像（CT）系统的方法

    公开(公告)号：US20090161814A1

    公开(公告)日：2009-06-25

    申请号：US11959709

    申请日：2007-12-19

    申请人： Xiaoye Wu ,  James Walter Leblanc ,  Paavana Sainath

    发明人： Xiaoye Wu ,  James Walter Leblanc ,  Paavana Sainath

    IPC分类号： G12B13/00 ,  G06K9/00 ,  A61B6/03

    CPC分类号： A61B6/583 ,  A61B6/032 ,  A61B6/482 ,  A61B6/505

    摘要： A method for calibrating and reconstructing material density images in a dual-spectral computed tomography (CT) system 100 is disclosed. An X-ray source in the CT system 100 emits a first X-ray spectrum and a second X-ray spectrum towards an object. The method includes computing calibration coefficients by using projection data from the object for the two X-ray spectra and by linearizing at least two basis materials such as bone and water simultaneously. Further, basis materials decomposition coefficients for the at least two basis materials are computed by linearizing the basis materials individually. Correction values for the projection data and for the basis materials are then computed by using the basis materials decomposition coefficients and the calibration coefficients. The computed correction values are used in reconstructing material density images for the basis materials.

    摘要翻译： 公开了一种用于在双光谱计算机断层摄影（CT）系统100中校准和重建材料密度图像的方法。 CT系统100中的X射线源朝向物体发射第一X射线光谱和第二X射线光谱。 该方法包括通过使用来自对象的两个X射线光谱的投影数据和同时线性化至少两种基础材料例如骨骼和水来计算校准系数。 此外，通过将基础材料单独线性化来计算至少两种基础材料的基础材料分解系数。 然后通过使用基础材料分解系数和校准系数来计算投影数据和基础材料的校正值。 计算的校正值用于重建基础材料的材料密度图像。

    Method and apparatus for correcting bone induced spectral artifacts
    50.
    发明申请
    Method and apparatus for correcting bone induced spectral artifacts 失效
    用于矫正骨诱导的光谱伪影的方法和装置

    公开(公告)号：US20050002484A1

    公开(公告)日：2005-01-06

    申请号：US10611477

    申请日：2003-07-01

    申请人： Xiaoye Wu ,  James LeBlanc

    发明人： Xiaoye Wu ,  James LeBlanc

    IPC分类号： A61B6/00 ,  A61B6/03 ,  G21K1/12 ,  G01N23/00

    CPC分类号： A61B6/583 ,  A61B6/032 ,  A61B6/501 ,  A61B6/585

    摘要： The present technique provides for the estimation and correction of bone induced spectral (BIS) artifacts. Spectral matching is employed to approximate the incident X-ray spectrum attenuated by bone and water with an X-ray spectrum attenuated by water alone. A table can be built to express the amount in apparent projection value shift for objects containing bone and water compared with water-like object when their corresponding normalized spectra match. The BIS error may thereby be determined from existing spectral error data obtained from spectral calibration. A corresponding correction factor may be determined from the shift value.

    摘要翻译： 本技术提供骨诱导光谱（BIS）假象的估计和校正。 采用光谱匹配来近似被水和单独衰减的X射线谱衰减的入射X射线谱。 当相应的归一化光谱相匹配时，可以建立一个表格来表达含有骨骼和水的物体的表观投影值偏移量，与水样物体相比。 因此可以从从光谱校准获得的现有光谱误差数据确定BIS误差。 可以从移位值确定相应的校正因子。