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公开(公告)号：US07382853B2
公开(公告)日：2008-06-03
申请号：US10904736
申请日：2004-11-24
申请人： Jerome S. Arenson , David Ruimi , Lev Greenberg , Yanfeng Du
发明人： Jerome S. Arenson , David Ruimi , Lev Greenberg , Yanfeng Du
IPC分类号： H05G1/26
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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公开(公告)号：US20070116173A1
公开(公告)日：2007-05-24
申请号：US11627072
申请日：2007-01-25
申请人： Jerome Arenson , Evgeny Drapkin , Yanfeng Du , Lev Greenberg , Oded Meirav , David Ruimi , John Tkaczyk , Xiaoye Wu
发明人： Jerome Arenson , Evgeny Drapkin , Yanfeng Du , Lev Greenberg , Oded Meirav , David Ruimi , John Tkaczyk , Xiaoye Wu
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：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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公开(公告)号：US20060109950A1
公开(公告)日：2006-05-25
申请号：US10904736
申请日：2004-11-24
申请人： Jerome Arenson , John Tkaczyk , David Ruimi , Oded Meirav , Evgeny Drapkin , Dmitry Samsonov , Lev Greenberg , Bruno De Man , Samit Basu , Xiaoye Wu , Yangeng Du
发明人： Jerome Arenson , John Tkaczyk , David Ruimi , Oded Meirav , Evgeny Drapkin , Dmitry Samsonov , Lev Greenberg , Bruno De Man , Samit Basu , Xiaoye Wu , Yangeng Du
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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5.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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6.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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7.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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8.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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