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11.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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12.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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公开(公告)号：US06850588B2
公开(公告)日：2005-02-01
申请号：US10064541
申请日：2002-07-25
摘要： A method and system for reducing radiation exposure from an imaging system including determining an entry location, operating the imaging system so as to cause the imaging system to emit radiation having a radiation intensity, controlling the radiation intensity in a manner responsive to the entry location so as to create image data and processing the image data so as to create processed image data. In an alternative embodiment, a medium encoded with a machine-readable computer program code for reducing radiation exposure from an imaging system, the medium including instructions for causing a controller to implement the aforementioned method.
摘要翻译： 一种用于减少成像系统的辐射暴露的方法和系统，包括确定入口位置，操作成像系统以使成像系统发射具有辐射强度的辐射，以响应入口位置的方式控制辐射强度 以创建图像数据并处理图像数据，以便创建经处理的图像数据。 在替代实施例中，编码有用于减少来自成像系统的辐射暴露的机读计算机程序代码的介质，所述介质包括用于使控制器实现上述方法的指令。
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14.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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