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公开(公告)号：US08466420B2
公开(公告)日：2013-06-18
申请号：US12794525
申请日：2010-06-04
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。
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22.发明授权公开(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
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。
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23.发明申请公开(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
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。
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24.发明授权公开(公告)号：US07573040B2
公开(公告)日：2009-08-11
申请号：US11690374
申请日：2007-03-23
申请人： J. Eric Tkaczyk , Wen Li , Yanfeng Du , James W. LeBlanc
发明人： J. Eric Tkaczyk , Wen Li , Yanfeng Du , James W. LeBlanc
IPC分类号： G01T1/24
摘要： A diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged. An energy discriminating (ED) detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The ED detector includes a first direct conversion layer and a second direct conversion layer. The first direct conversion layer comprises a first direct conversion material and the second direct conversion layer comprises a second direct conversion material that is different from the first direct conversion material. A data acquisition system (DAS) is operably connected to the ED detector and a computer operably connected to the DAS.
摘要翻译： 诊断成像系统包括向待成像对象发射高频电磁能束的高频电磁能源。 能量识别（ED）检测器接收由高频电磁能源发出的高频电磁能。 ED检测器包括第一直接转换层和第二直接转换层。 第一直接转换层包括第一直接转换材料，第二直接转换层包括不同于第一直接转换材料的第二直接转换材料。 数据采集系统（DAS）可操作地连接到ED检测器和可操作地连接到DAS的计算机。
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25.发明申请METHOD AND SYSTEM OF ENERGY INTEGRATING AND PHOTON COUNTING USING LAYERED PHOTON COUNTING DETECTOR 失效使用层状光子计数检测器的能量积分和光子计数的方法和系统公开(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
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。
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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。
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27.发明授权Method and apparatus to reduce charge sharing in pixellated energy discriminating detectors 有权减少像素化能量鉴别检测器中电荷共享的方法和装置公开(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
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。
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28.发明申请公开(公告)号：US20080230709A1
公开(公告)日：2008-09-25
申请号：US11690374
申请日：2007-03-23
申请人： J. Eric Tkaczyk , Wen Li , Yanfeng Du , James W. LeBlanc
发明人： J. Eric Tkaczyk , Wen Li , Yanfeng Du , James W. LeBlanc
IPC分类号： G01T1/24
摘要： A diagnostic imaging system includes a high frequency electromagnetic energy source that emits a beam of high frequency electromagnetic energy toward an object to be imaged. An energy discriminating (ED) detector receives high frequency electromagnetic energy emitted by the high frequency electromagnetic energy source. The ED detector includes a first direct conversion layer and a second direct conversion layer. The first direct conversion layer comprises a first direct conversion material and the second direct conversion layer comprises a second direct conversion material that is different from the first direct conversion material. A data acquisition system (DAS) is operably connected to the ED detector and a computer operably connected to the DAS.
摘要翻译： 诊断成像系统包括向待成像对象发射高频电磁能束的高频电磁能源。 能量识别（ED）检测器接收由高频电磁能源发出的高频电磁能。 ED检测器包括第一直接转换层和第二直接转换层。 第一直接转换层包括第一直接转换材料，第二直接转换层包括不同于第一直接转换材料的第二直接转换材料。 数据采集系统（DAS）可操作地连接到ED检测器和可操作地连接到DAS的计算机。
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29.发明授权公开(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
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。
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30.发明申请HIGH DQE PHOTON COUNTING DETECTOR USING STATISTICAL RECOVERY OF PILE-UP EVENTS 失效使用统计恢复活动的高DQE光电计数检测器公开(公告)号：US20090039273A1
公开(公告)日：2009-02-12
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
摘要： A photon-counting detector includes a direct conversion material constructed to directly convert an energy of at least one incident photon to an electrical signal indicative of the energy level of the at least one individual photon and a data acquisition system (DAS). The DAS includes a first comparator having a first signal level threshold that is less than an electrical signal level that is indicative of a maximum energy 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 that is greater than or equal to the electrical signal level 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. The DAS further includes a device configured to determine a photon count based on the counts from the first and second comparators and to output the photon count for image reconstruction.
摘要翻译： 光子计数检测器包括被直接转换至少一个入射光子的能量到指示至少一个单独光子和数据采集系统（DAS）的能级的电信号的直接转换材料。 DAS包括第一比较器，其具有小于指示光子谱的最大能量的电信号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第一信号时输出计数 以及具有大于或等于指示光子谱的最大能量的电信号电平的第二信号电平阈值的第二比较器，所述第二比较器被配置为当电信号超过第二电平时输出计数 信号电平门限。 DAS还包括被配置为基于来自第一和第二比较器的计数确定光子计数并输出用于图像重建的光子计数的装置。
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