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1.发明授权公开(公告)号：US08488854B2
公开(公告)日：2013-07-16
申请号：US13313281
申请日：2011-12-07
CPC分类号： G06T11/005 , G06T2211/408
摘要： A system and apparatus for classifying x-ray energy into discrete levels include an imaging system comprising an x-ray source, a detector, and a DAS having a discriminator assembly configured to count photon hits in the detector. A computer causes the discriminator assembly to count photon hits in the detector having an energy level greater than or equal to first and second threshold levels during an imaging scan, wherein the second threshold level is distinct from the first threshold level. The computer further modifies the counted photon hits having an energy level greater than or equal to the first threshold level based on the counted photon hits having an energy level greater than or equal to the second threshold level and reconstructs an image based on the modified photon hits and based on the counted photon hits having an energy level greater than or equal to a second threshold level.
摘要翻译： 用于将x射线能量分类为离散水平的系统和装置包括成像系统，其包括x射线源，检测器和DAS，其具有被配置为对检测器中的光子命中进行计数的鉴别器组件。 计算机使鉴别器组件在成像扫描期间计数具有大于或等于第一和第二阈值电平的能级的检测器中的光子命中，其中第二阈值电平与第一阈值电平不同。 计算机基于具有大于或等于第二阈值电平的能级的计数光子命中，进一步修改具有大于或等于第一阈值电平的能级的计数光子命中，并且基于经修改的光子命中重建图像 并且基于具有大于或等于第二阈值水平的能级的计数光子命中。
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2.发明申请公开(公告)号：US20130148873A1
公开(公告)日：2013-06-13
申请号：US13313281
申请日：2011-12-07
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/408
摘要： A system and apparatus for classifying x-ray energy into discrete levels include an imaging system comprising an x-ray source, a detector, and a DAS having a discriminator assembly configured to count photon hits in the detector. A computer causes the discriminator assembly to count photon hits in the detector having an energy level greater than or equal to first and second threshold levels during an imaging scan, wherein the second threshold level is distinct from the first threshold level. The computer further modifies the counted photon hits having an energy level greater than or equal to the first threshold level based on the counted photon hits having an energy level greater than or equal to the second threshold level and reconstructs an image based on the modified photon hits and based on the counted photon hits having an energy level greater than or equal to a second threshold level.
摘要翻译： 用于将x射线能量分类为离散水平的系统和装置包括成像系统，其包括x射线源，检测器和DAS，其具有被配置为对检测器中的光子命中进行计数的鉴别器组件。 计算机使鉴别器组件在成像扫描期间计数具有大于或等于第一和第二阈值电平的能级的检测器中的光子命中，其中第二阈值电平与第一阈值电平不同。 计算机基于具有大于或等于第二阈值电平的能级的计数光子命中，进一步修改具有大于或等于第一阈值电平的能级的计数光子命中，并且基于经修改的光子命中重建图像 并且基于具有大于或等于第二阈值水平的能级的计数光子命中。
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3.发明申请公开(公告)号：US20120087463A1
公开(公告)日：2012-04-12
申请号：US12902291
申请日：2010-10-12
申请人： Lev Greenberg , Daniel Rubin , Baruch Rosner , Galit Naveh , Reuven Levinson , Jerome Stephen Arenson , Shalom Rosenberg
发明人： Lev Greenberg , Daniel Rubin , Baruch Rosner , Galit Naveh , Reuven Levinson , Jerome Stephen Arenson , Shalom Rosenberg
摘要： An imaging system includes an x-ray source, a detector that receives x-rays emitted from the x-ray source, a DAS configured to count photon hits in the detector that occur at photon energies above at least a low keV threshold, a medium keV threshold, and a high keV threshold, and a computer operably coupled to the DAS. The computer is programmed to vary each of the medium keV threshold and the high keV threshold over a continuous keV range during data acquisition to define low, medium, and high keV bins that are based on the low, medium, and high keV thresholds, obtain photon counts in the low, medium, and high keV bins in a plurality of keV threshold combinations, calculate a noise variance as a function of at least one of the keV thresholds, and identify a noise minimum and low, medium, and high keV thresholds that correspond thereto.
摘要翻译： 成像系统包括x射线源，接收从X射线源发射的x射线的检测器，被配置成计数在高于至少低keV阈值的光子能量下发生的检测器中的光子命中的DAS，介质 keV阈值和高keV阈值，以及可操作地耦合到DAS的计算机。 计算机被编程为在数据采集期间在连续keV范围内改变每个介质keV阈值和高keV阈值，以定义基于低，中和高keV阈值的低，中和高keV仓，获得 在多个keV阈值组合中的低，中和高keV仓中的光子计数计算作为keV阈值中的至少一个的函数的噪声方差，并且识别噪声最小和低，中，高keV阈值 对应于此。
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4.发明授权公开(公告)号：US08422636B2
公开(公告)日：2013-04-16
申请号：US12902291
申请日：2010-10-12
申请人： Lev Greenberg , Daniel Rubin , Baruch Rosner , Galit Naveh , Reuven Levinson , Jerome Stephen Arenson , Shalom Rosenberg
发明人： Lev Greenberg , Daniel Rubin , Baruch Rosner , Galit Naveh , Reuven Levinson , Jerome Stephen Arenson , Shalom Rosenberg
IPC分类号： H05G1/64 , G01N23/087
摘要： An imaging system includes an x-ray source, a detector that receives x-rays emitted from the x-ray source, a DAS configured to count photon hits in the detector that occur at photon energies above at least a low keV threshold, a medium keV threshold, and a high keV threshold, and a computer operably coupled to the DAS. The computer is programmed to vary each of the medium keV threshold and the high keV threshold over a continuous keV range during data acquisition to define low, medium, and high keV bins that are based on the low, medium, and high keV thresholds, obtain photon counts in the low, medium, and high keV bins in a plurality of keV threshold combinations, calculate a noise variance as a function of at least one of the keV thresholds, and identify a noise minimum and low, medium, and high keV thresholds that correspond thereto.
摘要翻译： 成像系统包括x射线源，接收从X射线源发射的x射线的检测器，被配置成计数在高于至少低keV阈值的光子能量下发生的检测器中的光子命中的DAS，介质 keV阈值和高keV阈值，以及可操作地耦合到DAS的计算机。 计算机被编程为在数据采集期间在连续keV范围内改变每个介质keV阈值和高keV阈值，以定义基于低，中和高keV阈值的低，中和高keV仓，获得 在多个keV阈值组合中的低，中和高keV仓中的光子计数计算作为keV阈值中的至少一个的函数的噪声方差，并且识别噪声最小和低，中，高keV阈值 对应于此。
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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。
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6.发明授权Method and system of dynamically controlling shaping time of a photon counting energy-sensitive radiation detector to accommodate variations in incident radiation flux levels 有权动态控制光子计数能量敏感辐射探测器的成形时间以适应入射辐射通量水平的变化的方法和系统公开(公告)号：US07330527B2
公开(公告)日：2008-02-12
申请号：US11566605
申请日：2006-12-04
IPC分类号： H05G1/26
CPC分类号： G01T1/17 , A61B6/4241 , G01T1/1647 , G01T1/2985
摘要： A method and system of counting and tagging radiation energy received by a radiation detector is presented. The method and system are designed to dynamically control the sampling window or shaping time characteristics of a photon counting detector to accommodate variations of flux experienced by the detector so as to preserve optimum detector performance and prevent saturation during high flux conditions.
摘要翻译： 提出了一种对辐射检测器接收的辐射能进行计数和标记的方法和系统。 该方法和系统被设计为动态地控制光子计数检测器的采样窗口或成形时间特性，以适应检测器所经受的通量的变化，从而保持最佳检测器性能并防止高通量条件下的饱和。
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7.发明授权公开(公告)号：US07424090B2
公开(公告)日：2008-09-09
申请号：US11745765
申请日：2007-05-08
IPC分类号： A61B6/03
摘要： The present invention is a directed method and apparatus for collimating a radiation beam such that the full intensity of the radiation beam does not impinge detectors of a radiation detector assembly that are particularly susceptible to saturation or over-ranging. This collimation can be dynamically adjusted on a per view basis using empirical or scout scan data.
摘要翻译： 本发明是一种用于准直辐射束的定向方法和装置，使得辐射束的全部强度不会影响辐射探测器组件的特别容易饱和或超范围的检测器。 可以使用经验或侦察扫描数据在每个视图基础上动态调整此准直。
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公开(公告)号：US07260170B2
公开(公告)日：2007-08-21
申请号：US11627144
申请日：2007-01-25
申请人： Jerome Stephen Arenson , David Ruimi , Evgeny Drapkin , Dmitry Samsonov , Bruno K. B. De Man , Samit Kumar Basu
发明人： Jerome Stephen Arenson , David Ruimi , Evgeny Drapkin , Dmitry Samsonov , Bruno K. B. De Man , Samit Kumar Basu
IPC分类号： G01N23/00
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.
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公开(公告)号：US07336769B2
公开(公告)日：2008-02-26
申请号：US11622335
申请日：2007-01-11
IPC分类号： G21K3/00
CPC分类号： G21K1/04 , G21K1/043 , Y10T29/49002
摘要： The invention is directed to an x-ray flux management device that adaptively attenuates an x-ray beam to limit the incident flux reaching a subject and radiographic detectors in potentially high-flux areas while not affecting the incident flux and detector measurements in low-flux regions. While the invention is particularly well-suited for CT, the invention is also applicable with other x-ray imaging systems. In addition to reducing the required detector system dynamic range, the present invention provides an added advantage of reducing radiation dose.
摘要翻译： 本发明涉及一种x射线通量管理装置，其自适应地衰减X射线束以限制到达对象的入射通量和潜在的高通量区域中的射线照相检测器，同时不影响入射通量和低通量中的检测器测量 地区。 尽管本发明特别适用于CT，但是本发明也适用于其它X射线成像系统。 除了减少所需的检测器系统动态范围之外，本发明还提供了降低辐射剂量的附加优点。
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公开(公告)号：US07649974B2
公开(公告)日：2010-01-19
申请号：US10993705
申请日：2004-11-18
摘要： Methods and systems for controlling an X-ray imaging system. The method for controlling an X-ray imaging system includes acquiring a plurality of subviews of patient attenuation data wherein a first set of subviews of patient attenuation data is acquired at a first radiation flux level and a second set of subviews of patient attenuation data is acquired at a second radiation flux level. The first radiation flux level is different than the second radiation flux level. The method further includes combining the first set of subviews of patient attenuation data and the second set of subviews of patient attenuation data to form corrected views for subsequent image generation.
摘要翻译： 用于控制X射线成像系统的方法和系统。 用于控制X射线成像系统的方法包括获取患者衰减数据的多个子视图，其中在第一辐射通量水平获取患者衰减数据的第一组子视图，并且获取患者衰减数据的第二组子视图 在第二辐射通量水平。 第一辐射通量水平不同于第二辐射通量水平。 该方法还包括组合患者衰减数据的第一组子视图和患者衰减数据的第二组子视图以形成用于后续图像生成的校正视图。
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