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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：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。

    Method and system of CT data correction
    2.
    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。

    Material decomposition image noise reduction
    5.
    发明授权
    Material decomposition image noise reduction 失效
    材料分解图像降噪

    公开(公告)号：US07734076B2

    公开(公告)日：2010-06-08

    申请号：US11609262

    申请日：2006-12-11

    申请人： Yanfeng Du ,  John Eric Tkaczyk

    发明人： Yanfeng Du ,  John Eric Tkaczyk

    IPC分类号： G06K9/00 ,  A61B6/00

    CPC分类号： A61B6/4241 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/482 ,  A61B6/583

    摘要： A diagnostic imaging system in an example includes a high frequency electromagnetic energy source, a detector, a data acquisition system (DAS), and a computer. The high frequency electromagnetic energy source emits a beam of high frequency electromagnetic energy toward an object to be imaged. The detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The DAS is operably connected to the detector and programmed to employ a threshold to trigger a filter operation on a pixel, in a basis material decomposition (BMD) image of a plurality of BMD images, through comparison of an actual noise ratio between a pair of BMD images, of the plurality of BMD images, to a theoretical BMD noise ratio value. The computer is programmed to employ a correlation in noise distribution of the plurality of BMD images to reduce image noise in the plurality of BMD images.

    摘要翻译： 示例中的诊断成像系统包括高频电磁能量源，检测器，数据采集系统（DAS）和计算机。 高频电磁能源朝向要成像的物体发射高频电磁能束。 检测器接收高频电磁能源发出的高频电磁能。 DAS可操作地连接到检测器，并且被编程为通过比较多个BMD图像中的实际噪声比，在多个BMD图像的基础材料分解（BMD）图像中采用阈值来触发像素上的滤波器操作 多个BMD图像中的BMD图像达到理论BMD噪声比值。 计算机被编程为在多个BMD图像的噪声分布中采用相关性，以减少多个BMD图像中的图像噪声。

    High DQE photon counting detector using statistical recovery of pile-up events
    6.
    发明授权
    High DQE photon counting detector using statistical recovery of pile-up events 失效
    高DQE光子计数检测器采用统计恢复堆积事件

    公开(公告)号：US07696483B2

    公开(公告)日：2010-04-13

    申请号：US11837328

    申请日：2007-08-10

    申请人： John Eric Tkaczyk ,  Samit Kumar Basu ,  Wen Li ,  Yanfeng Du

    发明人： John Eric Tkaczyk ,  Samit Kumar Basu ,  Wen Li ,  Yanfeng Du

    IPC分类号： G01T1/24

    CPC分类号： G01T1/171 ,  G01T1/247 ,  G01T1/249

    摘要： A photon-counting detector includes a direct conversion material and a data acquisition system with a first comparator having a first signal level threshold indicative of a noise level of a spectrum of photons, the first comparator configured to output a count when the electrical signal level exceeds the first signal level threshold, and a second comparator having a second signal level threshold indicative of the maximum energy of the spectrum of photons, the second comparator configured to output a count when the electrical signal exceeds the second signal level threshold where a photon count is determined based on the counts from the first and second comparators.

    摘要翻译： 光子计数检测器包括直接转换材料和具有第一比较器的数据采集系统，第一比较器具有指示光子谱的噪声电平的第一信号电平阈值，第一比较器被配置为当电信号电平超过时输出计数 第一信号电平阈值和具有指示光子谱的最大能量的第二信号电平阈值的第二比较器，第二比较器被配置为当电信号超过第二信号电平阈值时输出计数，其中光子计数是 基于来自第一和第二比较器的计数确定。

    SYSTEM AND METHOD FOR TIME-TO-VOLTAGE CONVERSION WITH LOCK-OUT LOGIC
    7.
    发明申请
    SYSTEM AND METHOD FOR TIME-TO-VOLTAGE CONVERSION WITH LOCK-OUT LOGIC 有权
    具有锁定逻辑的时间到电压转换的系统和方法

    公开(公告)号：US20090128216A1

    公开(公告)日：2009-05-21

    申请号：US12199020

    申请日：2008-08-27

    申请人： Naresh Kesavan Rao ,  Brian David Yanoff ,  Yanfeng Du ,  Jianjun Guo

    发明人： Naresh Kesavan Rao ,  Brian David Yanoff ,  Yanfeng Du ,  Jianjun Guo

    IPC分类号： G06G7/18

    CPC分类号： G06G7/18 ,  A61B6/037 ,  G01T1/247 ,  G01T1/249 ,  G01T1/2985

    摘要： An event time stamping system comprising a current source, an integrator comprising an input and an output, and configured to output a voltage proportional to the length of time the current source is coupled to the input, and one or more switches configured to couple the current source to the input of the integrator upon receipt of an event signal and configured to de-couple the current source from the input of the integrator upon receipt of a control trigger. The system further comprises a lock-out signal generator configured to generate a lock-out signal, and a controller coupled to the one or more switches, wherein the controller is configured to generate the control trigger based on the lock-out signal to ensure a minimum integration time.

    摘要翻译： 一种事件时间戳系统，包括电流源，积分器，包括输入和输出，并且被配置为输出与电流源耦合到输入端的时间长度成比例的电压;以及一个或多个开关，被配置为耦合电流 在接收到事件信号时将其提供给积分器的输入，并且被配置为在接收到控制触发时将积分器的输入与当前源解耦。 所述系统还包括被配置为产生锁定信号的锁定信号发生器和耦合到所述一个或多个开关的控制器，其中所述控制器被配置为基于所述锁定信号产生所述控制触发，以确保 最小积分时间。

    Subpixel routing and processing for an imaging system or the like
    8.
    发明授权
    Subpixel routing and processing for an imaging system or the like 有权
    用于成像系统等的子像素路由和处理

    公开(公告)号：US07488945B2

    公开(公告)日：2009-02-10

    申请号：US11291273

    申请日：2005-11-30

    申请人： Wen Li ,  John Eric Tkaczyk ,  Yanfeng Du ,  James Leblanc

    发明人： Wen Li ,  John Eric Tkaczyk ,  Yanfeng Du ,  James Leblanc

    IPC分类号： G01T1/24

    CPC分类号： H01L27/14603 ,  G01T1/2928 ,  H01L27/14659

    摘要： Count rates may be obtained from one or more subpixels for a given pixel in an imaging system detector. Count rates may be obtained from individual subpixels, or may be from electronically binned subpixels at least in part in various subpixel arrangements where a selected subpixel arrangement may be adaptively set according to a detected count rate. For lower count rates, two or more subpixels may be electronically binned together and the counts may be obtained from the binned subpixels, for example to mitigate a charge sharing effect. For higher count rates, the count rates of a greater number of subpixels may be individually obtained, for example to mitigate a pulse pile-up effect. Detective quantum efficiency may be optimized over a wider range of photon flux rate via the adaptive subpixel arrangement.

    摘要翻译： 可以从成像系统检测器中的给定像素的一个或多个子像素获得计数率。 可以从各个子像素获得计数速率，或者可以至少部分地根据检测到的计数速率自适应地选择所选择的子像素排列的各种子像素排列从电子分组的子像素获得。 对于较低的计数率，可以将两个或更多个子像素电子地分组在一起，并且可以从二进制子像素获得计数，例如以减轻电荷共享效应。 对于更高的计数率，可以单独获得更多数量的子像素的计数率，例如以减轻脉冲堆积效应。 可以通过自适应子像素排列在更宽的光子通量速率范围内优化探测量子效率。

    X-ray detectors with adjustable active area electrode assembly
    9.
    发明申请
    X-ray detectors with adjustable active area electrode assembly 审中-公开
    具有可调节有源区电极组件的X射线探测器

    公开(公告)号：US20070290142A1

    公开(公告)日：2007-12-20

    申请号：US11454532

    申请日：2006-06-16

    申请人： Yanfeng Du ,  John Eric Tkaczyk ,  Wen Li

    发明人： Yanfeng Du ,  John Eric Tkaczyk ,  Wen Li

    IPC分类号： G01T1/24

    CPC分类号： G01T1/241

    摘要： An electrode assembly having an adjustable active area is provided. The electrode assembly is configured to detect photons. The electrode assembly includes a central readout electrode, and one or more bias control portions. The bias control portions are disposed adjacent to the central readout electrode. The active area is altered by controlling voltages of the bias control portions relative to a voltage of the central readout electrode.

    摘要翻译： 提供具有可调节有效面积的电极组件。 电极组件被配置为检测光子。 电极组件包括中央读出电极和一个或多个偏置控制部分。 偏置控制部分邻近中央读出电极设置。 通过控制偏置控制部分相对于中央读出电极的电压的电压来改变有效区域。