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    Method and system of CT data correction
    1.
    发明授权
    Method and system of CT data correction 有权
    CT数据校正方法与系统

    公开(公告)号：US07260172B2

    公开(公告)日：2007-08-21

    申请号：US11627072

    申请日：2007-01-25

    申请人： Jerome Stephen Arenson ,  Evgeny Drapkin ,  Yanfeng Du ,  Lev Greenberg ,  Oded Meirav ,  David Ruimi ,  John Eric Tkaczyk ,  Xiaoye Wu

    发明人： Jerome Stephen Arenson ,  Evgeny Drapkin ,  Yanfeng Du ,  Lev Greenberg ,  Oded Meirav ,  David Ruimi ,  John Eric Tkaczyk ,  Xiaoye Wu

    IPC分类号： G01N23/083

    CPC分类号： G01T1/1644 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/583 ,  G01T1/1647 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2207/30112 ,  Y10S378/901

    摘要： An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others. The invention is applicable with energy discriminating CT systems as well as with conventional CT systems and other multi-energy CT systems, such as dual kVp-based systems.

    摘要翻译： 提出了一种自适应CT数据采集系统和技术，其中动态地控制用于CT数据采集的辐射，以限制在给定数据采集期间可能特别容易饱和的CT检测器组件的那些检测器的暴露。 数据采集​​技术认识到，对于给定的主体大小和位置，预辐射滤波和辐射束的准直可能不足以完全防止检测器饱和。 因此，本发明包括实现用于校正饱和CT检测器的其他不可用数据的多个CT数据校正技术。 这些数据校正技术包括最近邻校正，偏心幻像校正，偏心合成数据校正，侦察数据校正，平面放射线图校正以及其他数目。 本发明适用于能量识别CT系统以及常规CT系统和其他多能CT系统，例如基于双kVp的系统。

    METHOD AND SYSTEM OF ENERGY INTEGRATING AND PHOTON COUNTING USING LAYERED PHOTON COUNTING DETECTOR
    3.
    发明申请
    METHOD AND SYSTEM OF ENERGY INTEGRATING AND PHOTON COUNTING USING LAYERED PHOTON COUNTING DETECTOR 失效
    使用层状光子计数检测器的能量积分和光子计数的方法和系统

    公开(公告)号：US20090129538A1

    公开(公告)日：2009-05-21

    申请号：US11941175

    申请日：2007-11-16

    申请人： John Eric Tkaczyk ,  Jonathan D. Short ,  Yanfeng Du ,  Wen Li ,  Xiaoye Wu

    发明人： John Eric Tkaczyk ,  Jonathan D. Short ,  Yanfeng Du ,  Wen Li ,  Xiaoye Wu

    IPC分类号： A61B6/00 ,  G01T1/20

    CPC分类号： G01T1/20 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  G01T1/242 ,  G01T1/249

    摘要： A diagnostic imaging system includes an x-ray source that emits a beam of x-ray energy toward an object to be imaged and an energy discriminating (ED) detector that receives the x-ray energy emitted by the x-ray energy source. The ED detector includes a first layer having a first thickness, wherein the first layer comprises a semiconductor configurable to operate in at least an integrating mode and a second layer having a second thickness greater than the first thickness, and configured to receive x-rays that pass through the first layer. The system further includes a data acquisition system (DAS) operably connected to the ED detector and a computer that is operably connected to the DAS. The computer is programmed to identify saturated data in the second layer and substitute the saturated data with non-saturated data from a corresponding pixel in the first layer.

    摘要翻译： 诊断成像系统包括向待成像对象发射X射线能量束的x射线源和接收由x射线能量源发射的x射线能量的能量鉴别（ED）检测器。 ED检测器包括具有第一厚度的第一层，其中第一层包括可配置成至少以积分模式操作的半导体和具有大于第一厚度的第二厚度的第二层，并且被配置为接收x射线， 通过第一层。 该系统还包括可操作地连接到ED检测器的数据采集系统（DAS）和可操作地连接到DAS的计算机。 计算机被编程为识别第二层中的饱和数据，并用来自第一层中的对应像素的非饱和数据替换饱和数据。

    METHOD AND APPARATUS FOR BASIS MATERIAL DECOMPOSITION WITH K-EDGE MATERIALS
    4.
    发明申请
    METHOD AND APPARATUS FOR BASIS MATERIAL DECOMPOSITION WITH K-EDGE MATERIALS 审中-公开
    用K-EDGE材料进行基础材料分解的方法和装置

    公开(公告)号：US20090052621A1

    公开(公告)日：2009-02-26

    申请号：US11843700

    申请日：2007-08-23

    申请人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

    发明人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

    IPC分类号： G01N23/06

    CPC分类号： G01N23/087 ,  A61B5/4869 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4042 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482 ,  G01N2223/423 ,  G01N2223/424

    摘要： A diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged, a detector that receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source, and a data acquisition system (DAS) operably connected to the detector. A computer is operably connected to the DAS and is programmed to generate corresponding sets of projection values for three or more energy spectra through employment of attenuation coefficients of three or more basis materials to simulate responses of the diagnostic imaging system to a plurality of lengths of the three or more basis materials wherein the three or more basis materials comprise two or more non K-edge basis materials and one or more K-edge basis materials.

    摘要翻译： 一种诊断成像系统包括：高频电磁能源，其向待成像对象发射高频电磁能束;接收由高频电磁能源发出的高频电磁能的检测器;以及数据采集系统（ DAS）可操作地连接到检测器。 计算机可操作地连接到DAS，并被编程为通过使用三个或更多个基础材料的衰减系数来产生三个或更多个能量谱的相应的投影值组，以模拟诊断成像系统对多个长度的 三种或更多种基础材料，其中三种或更多种基材包含两种或多种非K边缘基础材料和一种或多种K边缘基础材料。

    System and method of CT imaging with second tube/detector patching
    5.
    发明授权
    System and method of CT imaging with second tube/detector patching 有权
    用二次管/检测器修补CT成像的系统和方法

    公开(公告)号：US07433443B1

    公开(公告)日：2008-10-07

    申请号：US11846664

    申请日：2007-08-29

    申请人： John Eric Tkaczyk ,  Samit Kumar Basu ,  Xiaoye Wu ,  Yanfeng Du

    发明人： John Eric Tkaczyk ,  Samit Kumar Basu ,  Xiaoye Wu ,  Yanfeng Du

    IPC分类号： H05G1/26

    CPC分类号： A61B6/4014 ,  A61B6/032 ,  A61B6/4241 ,  G01T1/2985

    摘要： A CT imaging system includes a rotatable gantry having an opening to receive an object to be scanned, a first x-ray emission source attached to the rotatable gantry and configured to emit x-rays toward the object, and a second x-ray emission source attached to the rotatable gantry and configured to emit x-rays toward the object. A first detector is configured to receive x-rays that emit from the first x-ray emission source, and a second detector configured to receive x-rays that emit from the second x-ray emission source. A first portion of the first detector is configured to operate in an integration mode and a first portion of the second detector is configured to operate in at least a photon-counting mode.

    摘要翻译： CT成像系统包括可旋转机架，其具有用于接收待扫描物体的开口，附接到可旋转机架并被配置为朝向物体发射x射线的第一x射线发射源，以及第二x射线发射源 附接到可旋转机架并且被配置为朝向物体发射X射线。 第一检测器被配置为接收从第一x射线发射源发射的X射线，以及第二检测器，被配置为接收从第二x射线发射源发射的X射线。 第一检测器的第一部分被配置为以积分模式操作，并且第二检测器的第一部分被配置为以至少光子计数模式操作。

    System and method of density and effective atomic number imaging
    6.
    发明授权
    System and method of density and effective atomic number imaging 失效
    密度和有效原子序数成像的系统和方法

    公开(公告)号：US07697657B2

    公开(公告)日：2010-04-13

    申请号：US11690245

    申请日：2007-03-23

    申请人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

    发明人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

    IPC分类号： A61B6/00

    CPC分类号： A61B6/505 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/583

    摘要： A system and method of density and effective atomic number imaging include a computer programmed to acquire projection data from the detector of an unknown material at the time of projection data acquisition. The computer is also programmed to generate a density image for the unknown material based on a calibration of two or more known basis materials and to generate an effective atomic number (Z) for the unknown material based on the calibration of two or more known basis materials and based on a function arctan of a ratio of atomic numbers of the two or more known basis materials. The density and effective atomic number images are stored to a computer readable storage medium.

    摘要翻译： 密度和有效原子序数成像的系统和方法包括被编程为在投影数据采集时从未知材料的检测器获取投影数据的计算机。 计算机还被编程为基于两种或多种已知基础材料的校准产生未知材料的密度图像，并且基于两种或更多种已知基础材料的校准来产生未知材料的有效原子序数（Z） 并且基于两种或多种已知基础材料的原子序数比的函数关系。 密度和有效原子序数图像被存储到计算机可读存储介质中。

    Method and system of energy integrating and photon counting using layered photon counting detector
    7.
    发明授权
    Method and system of energy integrating and photon counting using layered photon counting detector 失效
    使用层状光子计数检测器的能量积分和光子计数的方法和系统

    公开(公告)号：US07613274B2

    公开(公告)日：2009-11-03

    申请号：US11941175

    申请日：2007-11-16

    申请人： John Eric Tkaczyk ,  Jonathan D. Short ,  Yanfeng Du ,  Wen Li ,  Xiaoye Wu

    发明人： John Eric Tkaczyk ,  Jonathan D. Short ,  Yanfeng Du ,  Wen Li ,  Xiaoye Wu

    IPC分类号： G01N23/00

    CPC分类号： G01T1/20 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/482 ,  G01T1/242 ,  G01T1/249

    摘要： A diagnostic imaging system includes an x-ray source that emits a beam of x-ray energy toward an object to be imaged and an energy discriminating (ED) detector that receives the x-ray energy emitted by the x-ray energy source. The ED detector includes a first layer having a first thickness, wherein the first layer comprises a semiconductor configurable to operate in at least an integrating mode and a second layer having a second thickness greater than the first thickness, and configured to receive x-rays that pass through the first layer. The system further includes a data acquisition system (DAS) operably connected to the ED detector and a computer that is operably connected to the DAS. The computer is programmed to identify saturated data in the second layer and substitute the saturated data with non-saturated data from a corresponding pixel in the first layer.

    摘要翻译： 诊断成像系统包括向待成像对象发射X射线能量束的x射线源和接收由x射线能量源发射的x射线能量的能量鉴别（ED）检测器。 ED检测器包括具有第一厚度的第一层，其中第一层包括可配置成至少以积分模式操作的半导体和具有大于第一厚度的第二厚度的第二层，并且被配置为接收x射线， 通过第一层。 该系统还包括可操作地连接到ED检测器的数据采集系统（DAS）和可操作地连接到DAS的计算机。 计算机被编程为识别第二层中的饱和数据，并用来自第一层中的对应像素的非饱和数据替换饱和数据。

    SYSTEM AND METHOD OF DENSITY AND EFFECTIVE ATOMIC NUMBER IMAGING
    8.
    发明申请
    SYSTEM AND METHOD OF DENSITY AND EFFECTIVE ATOMIC NUMBER IMAGING 失效
    密度和有效原子数成像系统与方法

    公开(公告)号：US20080273666A1

    公开(公告)日：2008-11-06

    申请号：US11690245

    申请日：2007-03-23

    申请人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

    发明人： Deborah Joy Walter ,  Xiaoye Wu ,  John Eric Tkaczyk ,  Yanfeng Du

    IPC分类号： H05G1/26

    CPC分类号： A61B6/505 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/481 ,  A61B6/583

    摘要： A system and method of density and effective atomic number imaging include a computer programmed to acquire projection data from the detector of an unknown material at the time of projection data acquisition. The computer is also programmed to generate a density image for the unknown material based on a calibration of two or more known basis materials and to generate an effective atomic number (Z) for the unknown material based on the calibration of two or more known basis materials and based on a function arctan of a ratio of atomic numbers of the two or more known basis materials. The density and effective atomic number images are stored to a computer readable storage medium.

    摘要翻译： 密度和有效原子序数成像的系统和方法包括被编程为在投影数据采集时从未知材料的检测器获取投影数据的计算机。 计算机还被编程为基于两种或多种已知基础材料的校准产生未知材料的密度图像，并且基于两种或更多种已知基础材料的校准来产生未知材料的有效原子序数（Z） 并且基于两种或多种已知基础材料的原子序数比的函数关系。 密度和有效原子序数图像被存储到计算机可读存储介质中。

    METHOD AND SYSTEM FOR IMAGE DATA ACQUISITION
    9.
    发明申请
    METHOD AND SYSTEM FOR IMAGE DATA ACQUISITION 有权
    用于图像数据采集的方法和系统

    公开(公告)号：US20110243413A1

    公开(公告)日：2011-10-06

    申请号：US12750050

    申请日：2010-03-30

    申请人： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

    发明人： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

    IPC分类号： G06K9/00 ,  G01N23/04 ,  H05G1/60

    CPC分类号： A61B6/4035 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/488 ,  A61B6/542

    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 fast kVp switching for dual energy CT
    10.
    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：US07826587B1

    公开(公告)日：2010-11-02

    申请号：US12558248

    申请日：2009-09-11

    申请人： David Allen Langan ,  John Eric Tkaczyk ,  James Walter LeBlanc ,  Colin R. Wilson ,  Xiaoye Wu ,  Dan Xu ,  Thomas Matthew Benson ,  Jed Douglas Pack

    发明人： David Allen Langan ,  John Eric Tkaczyk ,  James Walter LeBlanc ,  Colin R. Wilson ,  Xiaoye Wu ,  Dan Xu ,  Thomas Matthew Benson ,  Jed Douglas Pack

    IPC分类号： H05G1/60

    CPC分类号： A61B6/405 ,  A61B6/032 ,  A61B6/482

    摘要： A CT system includes a gantry, an x-ray source, a generator configured to energize the x-ray source to a first kVp and to a second kVp, a detector, and a controller. The controller is configured energize the x-ray source to the first kVp for a first time period, subsequently energize the x-ray source to the second kVp for a second time period, integrate data for a first integration period that includes a portion of a steady-state period of the x-ray source at the first kVp, integrate data for a second integration period that includes a portion of a steady-state period of the x-ray source at the second kVp, compare a signal-to-noise ratio (SNR) during the first integration period (SNRH) and the second integration period (SNRL), adjust an operating parameter of the CT system to optimize an SNRH with SNRL, and generate an image using the integrated data.

    摘要翻译： CT系统包括台架，x射线源，被配置为将x射线源激发到第一kVp的发生器和到第二kVp的检测器和控制器的发生器。 控制器被配置为在第一时间段内将x射线源激励到第一kVp，随后将x射线源激励到第二kVp第二时间段，将包含第一时间段的第一积分周期的数据整合 在第一kVp处的x射线源的稳态周期，将包括X射线源的稳态周期的一部分的第二积分周期的数据集成在第二kVp处，比较信号与噪声 在第一积分周期（SNRH）和第二积分周期（SNRL）期间的比率（SNR），调整CT系统的运行参数以利用SNRL优化SNRH，并使用积分数据生成图像。