公开(公告)号：US20070120062A1

公开(公告)日：2007-05-31

申请号：US11291273

申请日：2005-11-30

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

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

IPC分类号： G01T1/24 ,  G01T1/26 ,  H01L27/146

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

摘要： Briefly, in accordance with one or more embodiments, 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： 简而言之，根据一个或多个实施例，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。

公开(公告)号：US07403589B1

公开(公告)日：2008-07-22

申请号：US11691959

申请日：2007-03-27

申请人： Jonathan D. Short ,  George E. Possin ,  James W. LeBlanc ,  Rogerio G. Rodrigues ,  Kent C. Burr ,  Aaron J. Couture ,  Wen Li

发明人： Jonathan D. Short ,  George E. Possin ,  James W. LeBlanc ,  Rogerio G. Rodrigues ,  Kent C. Burr ,  Aaron J. Couture ,  Wen Li

IPC分类号： A61B6/00

CPC分类号： A61B6/482 ,  A61B6/032 ,  A61B6/4241 ,  G01T1/1642 ,  G01T1/2018

摘要： A detector module for a CT imaging system includes a scintillator to convert x-rays to optical photons. The scintillator is optically coupled to a solid-state photomultiplier with internal gain to receive the optical photons and convert them into a corresponding electrical signal output.

摘要翻译： 用于CT成像系统的检测器模块包括将X射线转换成光学光子的闪烁体。 闪烁体与具有内部增益的固态光电倍增管光学耦合，以接收光学光子并将其转换成相应的电信号输出。

公开(公告)号：US07486764B2

公开(公告)日：2009-02-03

申请号：US11625969

申请日：2007-01-23

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

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

IPC分类号： H01L27/146 ,  G01N23/00

CPC分类号： G01T1/249 ,  G01T1/24

摘要： A CT detector includes a plurality of metallized anodes with each metallized anode separated from another metallized anode by a gap. A direct conversion material is electrically coupled to the plurality of metallized anodes and has a charge sharing region in which an electrical charge generated by an x-ray impinging the direct conversion material is shared between at least two of the plurality of metallized anodes. An x-ray attenuating material is positioned to attenuate x-rays directed toward the charge sharing region.

摘要翻译： CT检测器包括多个金属化阳极，每个金属化阳极通过间隙从另一个金属化阳极分离。 直接转换材料电耦合到多个金属化阳极，并且具有电荷共享区域，其中由穿过直接转换材料的X射线产生的电荷在多个金属化阳极中的至少两个之间共享。 定位x射线衰减材料以衰减指向电荷共享区域的x射线。

公开(公告)号：US08466420B2

公开(公告)日：2013-06-18

申请号：US12794525

申请日：2010-06-04

申请人： Kristen Ann Wangerin ,  Wen Li ,  Yanfeng Du ,  Floribertus Heukensfeldt Jansen

发明人： Kristen Ann Wangerin ,  Wen Li ,  Yanfeng Du ,  Floribertus Heukensfeldt Jansen

IPC分类号： G01T1/161

CPC分类号： G01T1/2928 ,  A61B6/037

摘要： The present disclosure relates to the correction of charge loss in a radiation detector. In one embodiment, correction factors for charge loss may be determined based on depth of interaction and lateral position within a radiation detector of a charge creating event. The correction factors may be applied to subsequently measured signals to correct for the occurrence of charge loss in the measured signals.

摘要翻译： 本公开涉及对辐射检测器中的电荷损失的校正。 在一个实施例中，可以基于电荷产生事件的辐射检测器内的相互作用深度和横向位置确定电荷损失的校正因子。 校正因子可以应用于随后测量的信号，以校正测量信号中电荷损失的发生。

公开(公告)号：US07916836B2

公开(公告)日：2011-03-29

申请号：US11861826

申请日：2007-09-26

申请人： John Eric Tkaczyk ,  James Wilson Rose ,  Wen Li ,  Jonathan D. Short ,  Yanfeng Du

发明人： John Eric Tkaczyk ,  James Wilson Rose ,  Wen Li ,  Jonathan D. Short ,  Yanfeng Du

IPC分类号： H05G1/64 ,  H01L27/146

CPC分类号： G01T1/249 ,  A61B6/032 ,  G01T1/24

摘要： A CT detector includes a direct conversion material configured to generate electrical charge upon reception of x-rays, a plurality of metallized anodes configured to collect electrical charges generated in the direct conversion material, at least one readout device, and a redistribution layer having a plurality of electrical pathways configured to route the electrical charges from the plurality of metallized anodes to the at least one readout device. A plurality of switches is coupled to the plurality of electrical pathways between the plurality of metallized anodes and the at least one readout device, wherein each of the plurality of switches includes an input line electrically coupled to one of the plurality of metallized anodes, a first output node electrically coupled to the at least one readout device, and a second output node electrically coupled to at least one other switch of the plurality of switches.

摘要翻译： CT检测器包括被配置为在接收X射线时产生电荷的直接转换材料，被配置为收集在直接转换材料中产生的电荷的多个金属化阳极，至少一个读出装置和具有多个 电路被配置为将电荷从多个金属化阳极路由到至少一个读出装置。 多个开关耦合到多个金属化阳极与至少一个读出装置之间的多个电路径，其中多个开关中的每一个包括电耦合到多个金属化阳极之一的输入线，第一 电耦合到所述至少一个读出装置的第二输出节点，以及电耦合到所述多个开关中的至少一个其他开关的第二输出节点。

公开(公告)号：US20100019163A1

公开(公告)日：2010-01-28

申请号：US12220230

申请日：2008-07-23

申请人： Yanfeng Du ,  Naresh Kesavan Rao ,  Brian David Yanoff ,  Wen Li

发明人： Yanfeng Du ,  Naresh Kesavan Rao ,  Brian David Yanoff ,  Wen Li

IPC分类号： G01T1/26 ,  G01T1/24

CPC分类号： G01T1/244 ,  G01T7/00

摘要： A radiation detector includes at least one multiple channel pixellated detector driven via a plurality of pixellated anode electrodes and at least one planar cathode electrode. Each detector is configured to reduce the number of active pixellated anode electrodes until a rate of events detected via at least one corresponding planar cathode electrode exceeds a preset threshold above a background count rate within a predetermined time period.

摘要翻译： 辐射检测器包括经由多个像素化阳极电极和至少一个平面阴极电极驱动的至少一个多通道像素化检测器。 每个检测器被配置为减少有源像素化阳极电极的数量，直到经由至少一个对应的平面阴极电极检测到的事件的速率超过预定时间段内的背景计数率的预设阈值。

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。

公开(公告)号：US07388534B2

公开(公告)日：2008-06-17

申请号：US11458713

申请日：2006-07-20

申请人： Oliver Richard Astley ,  John Eric Tkaczyk ,  Naresh Kesavan Rao ,  James Walter LeBlanc ,  Wen Li ,  Yanfeng Du

发明人： Oliver Richard Astley ,  John Eric Tkaczyk ,  Naresh Kesavan Rao ,  James Walter LeBlanc ,  Wen Li ,  Yanfeng Du

IPC分类号： H03M1/12

CPC分类号： G01T1/17

摘要： An adaptive data acquisition circuit (26) includes an amplifier (14) for amplifying electrical pulses generated by a detector (12) responsive to energy incident at the detector. The adaptive data acquisition circuit also includes a counting circuit (28) for counting amplified electrical pulses generated by the amplifier. In addition, the adaptive data acquisition circuit includes a digital logic circuit (30) for determining a pulse parameter indicative of a pulse rate and an amount of energy present in the amplified electrical pulses and for generating a control signal (34) responsive to the pulse parameter for controlling an operating parameter of the data acquisition circuit.

摘要翻译： 自适应数据采集电路（26）包括放大器（14），用于响应于在检测器处入射的能量放大由检测器（12）产生的电脉冲。 自适应数据采集电路还包括用于对由放大器产生的放大电脉冲进行计数的计数电路（28）。 另外，自适应数据采集电路包括数字逻辑电路（30），用于确定指示放大的电脉冲中存在的脉冲速率和能量的脉冲参数，并产生响应脉冲的控制信号（34） 用于控制数据采集电路的工作参数的参数。

公开(公告)号：US20070003006A1

公开(公告)日：2007-01-04

申请号：US11171169

申请日：2005-06-29

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

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

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： G01T1/2985 ,  G01T1/241 ,  G01T1/242 ,  G01T1/243 ,  G01T1/249

摘要： A computed tomography detector module is presented. The detector module includes a substrate having a topside and a bottom side. Additionally, the detector module includes a plurality of detector layers disposed on the top side of the substrate in a direction that is substantially orthogonal to the substrate, where each of the plurality of detector layers comprises a direct conversion material configured to absorb radiation, and where each of the plurality of detector layers comprises a first side and a second side. Further, the detector module includes a plurality of pixelated anode contacts is disposed on the first side of each of the plurality of detector layers. Also, the detector module includes a common cathode contact is disposed on the second side of each of the plurality of detector layers.

公开(公告)号：US07741611B2

公开(公告)日：2010-06-22

申请号：US12220230

申请日：2008-07-23

申请人： Yanfeng Du ,  Naresh Kesavan Rao ,  Brian David Yanoff ,  Wen Li

发明人： Yanfeng Du ,  Naresh Kesavan Rao ,  Brian David Yanoff ,  Wen Li

IPC分类号： G01T1/24

CPC分类号： G01T1/244 ,  G01T7/00

摘要： A radiation detector includes at least one multiple channel pixelated detector driven via a plurality of pixelated anode electrodes and at least one planar cathode electrode. Each detector is configured to reduce the number of active pixelated anode electrodes until a rate of events detected via at least one corresponding planar cathode electrode exceeds a preset threshold above a background count rate within a predetermined time period.

摘要翻译： 辐射检测器包括经由多个像素化阳极电极和至少一个平面阴极电极驱动的至少一个多通道像素化检测器。 每个检测器被配置为减少活性像素化阳极电极的数量，直到经由至少一个对应的平面阴极电极检测到的事件的速率超过在预定时间段内的背景计数率以上的预设阈值。