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公开(公告)号：US12099152B2
公开(公告)日：2024-09-24
申请号：US17704520
申请日：2022-03-25
申请人： Ge Wang , Mengzhou Li , David S. Rundle
发明人： Ge Wang , Mengzhou Li , David S. Rundle
摘要： A method for x-ray photon-counting data correction. The method includes generating, by a training data generation module, training input spectral projection data based, at least in part, on a reference spectral projection data. The training input spectral projection data includes at least one of a pulse pileup distortion, a charge splitting distortion, and/or noise. The method further includes training, by a training module, a data correction artificial neural network (ANN) based, at least in part, on training data. The data correction ANN includes a pulse pileup correction ANN, and a charge splitting correction ANN. The training data includes the training input spectral projection data and the reference spectral projection data.
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公开(公告)号：US09945963B1
公开(公告)日：2018-04-17
申请号：US15666175
申请日：2017-08-01
CPC分类号： G01T1/208 , G01T1/171 , G01T1/2018
摘要： System includes a signal processing system to receive a digital signal associated with first scintillation events and to determine a value associated with each of the events, a backend processing system to receive the values, determine an event rate based on the received values, determine whether the event rate is greater than a first threshold, and, if the event rate is greater, transmit a first instruction to increase a consecutive event dump level, and an event management control to receive the first instruction to increase the consecutive event dump level, increase the consecutive event dump level in response to the received instruction, determine a number of consecutive scintillation events of detected second scintillation events, determine to dump the consecutive scintillation events based on a comparison between the number of consecutive scintillation events and the consecutive event dump level, and transmit a second instruction to dump the consecutive scintillation events.
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3.发明授权公开(公告)号：US09784784B2
公开(公告)日：2017-10-10
申请号：US14846143
申请日：2015-09-04
发明人： Shunsuke Kimura , Hideyuki Funaki
CPC分类号： G01R31/2635 , G01T1/171 , G01T1/20
摘要： According to an embodiment, a signal processing device includes a first integrator, a second integrator, a switcher, and a calculator. The first integrator is configured to integrate a current represented by a reference waveform equivalent to a normal waveform in a case of no pileup phenomenon regarding the current to calculate a first electrical charge. The second integrator is configured to integrate a current output from a photoelectric converter to calculate a second electrical charge. The switcher is configured to, when a pileup phenomenon has occurred, perform switching either to a state in which the first and second electrical charges are output or to a state in which the first electrical charge and a reference charge are output. The calculator is configured to calculate a first difference charge between the first and second electrical charges, and calculate a second difference charge between the first electrical charge and the reference charge.
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公开(公告)号：US09535167B2
公开(公告)日：2017-01-03
申请号：US14387950
申请日：2013-03-08
CPC分类号： G01T1/171 , G01T1/1606
摘要： An imaging system (100) includes a radiation source (108) that emits radiation that traverses an examination region, a paralyzable photon counting detector pixel (110) that detects photons traversing the examination region and arriving at an input photon rate and that generates a signal indicative thereof, high flux electronics (122) that produce a total time over threshold value each integration period based on the signal, a reconstruction parameter identifier (124) that estimates the input photon rate based on the total time over threshold value and identifies a reconstruction parameter based on the estimate, and a reconstructor (130) that reconstructs the signal based on the identified reconstruction parameter.
摘要翻译： 成像系统（100）包括发射穿过检查区域的辐射的辐射源（108），用于检测穿过检查区域并达到输入光子速率并产生信号的信号的可分析光子计数检测器像素（110） 基于该信号，每个积分周期产生超过阈值的总时间的高通量电子器件122;基于超过阈值的总时间估计输入光子速率的重构参数标识符（124），并识别重建 基于所述估计的参数，以及基于所识别的重建参数重构所述信号的重建器（130）。
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公开(公告)号：US20160363688A1
公开(公告)日：2016-12-15
申请号：US15157023
申请日：2016-05-17
发明人： Bruno Jorion
CPC分类号： G01V5/102 , G01T1/17 , G01T1/171 , G01T1/362 , G01T3/001 , G01V5/10 , G01V5/12 , G01V13/00 , G01V2210/40
摘要： A method and system for acquiring spectral information from an energy sensitive nuclear detector is disclosed. The method includes detecting nuclear radiation at a detection device and generating an electronic input pulse indicative of energy deposited in the detection device. The method further includes integrating the electronic input pulse at an integrating device to produce an integrated output signal and digitally sampling the integrated output signal of the integrating device at intervals to produce a stream of digital samples. The method further includes resetting the integrator synchronously with a sampling clock when a limit condition is reached.
摘要翻译： 公开了一种从能量敏感核检测器获取光谱信息的方法和系统。 该方法包括检测检测装置的核辐射并产生指示沉积在检测装置中的能量的电子输入脉冲。 该方法还包括在积分装置处积分电子输入脉冲以产生积分输出信号并且间隔地对积分装置的积分输出信号进行数字采样以产生数字样本流。 该方法还包括当达到极限条件时与采样时钟同步地重置积分器。
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公开(公告)号：US20160116615A1
公开(公告)日：2016-04-28
申请号：US14893578
申请日：2014-05-21
发明人： Peter STATHAM
摘要： A method is provided for processing a spectrum, obtained using a particle detection system, so as to reduce spectrum artifacts arising from unresolved particle events in the detection system. An input spectrum is obtained which contains artifacts due to “pile up” in the detector. A first effect upon the input spectrum of pairs of unresolved particle events is evaluated and a first corrected input spectrum is generated which comprises the input spectrum with the first effect removed. The effect of a pairs of unresolved particle events is then evaluated for this first corrected input spectrum so as to generate a second corrected input spectrum which comprises the input spectrum with the second effect removed. An output spectrum is then generated based upon a combination of the first and second corrected input spectra. The use of the method in improving sum spectra is also discussed.
摘要翻译： 提供了一种用于处理使用粒子检测系统获得的光谱的方法，以便减少由检测系统中未解决的粒子事件引起的光谱伪影。 获得包含由于检测器中的“堆积”造成的伪影的输入光谱。 评估对未解决的粒子事件对的输入光谱的第一影响，并且生成包括去除了第一效应的输入光谱的第一校正输入光谱。 然后针对该第一校正输入光谱评估一对未解决的粒子事件的影响，以便产生包括去除第二效应的输入光谱的第二校正输入光谱。 然后基于第一和第二校正输入光谱的组合产生输出光谱。 还讨论了该方法在改进和谱中的应用。
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公开(公告)号：US20160095559A1
公开(公告)日：2016-04-07
申请号：US14506982
申请日：2014-10-06
发明人： Daniel GAGNON , Gin Chung Wang
CPC分类号： A61B6/4241 , A61B6/032 , A61B6/4266 , A61B6/482 , G01T1/171
摘要： A photon-counting system includes photon-counting detectors that output photon-counting signals to indicate a number of photons impinging on the photon-counting detectors. The system also includes analog-to-digital conversion circuits, which convert one of the photon-counting signals into a digital photon-counting signals, and a processor that processes the digital photon-counting signals to extract information from the photon-counting signals. The information extracted can include a photon-counting rate. An intelligent multiplexer that, based on the photon-counting rate, modifies interconnection of the photon-counting detectors and analog-to-digital conversion circuits and provides digital photon-counting signals for a selected set of the analog-to-digital converters to the processor.
摘要翻译： 光子计数系统包括光子计数检测器，其输出光子计数信号以指示照射在光子计数检测器上的多个光子。 该系统还包括将一个光子计数信号转换为数字光子计数信号的模拟 - 数字转换电路，以及处理数字光子计数信号以从光子计数信号中提取信息的处理器。 提取的信息可以包括光子计数率。 一种智能多路复用器，其基于光子计数速率，修改光子计数检测器和模数转换电路的互连，并为选定的一组模数转换器提供数字光子计数信号， 处理器。
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8.发明申请SIGNAL PROCESSING DEVICE, RADIATION DETECTING DEVICE, AND SIGNAL PROCESSING METHOD 有权信号处理装置，辐射检测装置和信号处理方法公开(公告)号：US20160077148A1
公开(公告)日：2016-03-17
申请号：US14846143
申请日：2015-09-04
发明人： Shunsuke KIMURA , Hideyuki FUNAKI
CPC分类号： G01R31/2635 , G01T1/171 , G01T1/20
摘要： According to an embodiment, a signal processing device includes a first integrator, a second integrator, a switcher, and a calculator. The first integrator is configured to integrate a current represented by a reference waveform equivalent to a normal waveform in a case of no pileup phenomenon regarding the current to calculate a first electrical charge. The second integrator is configured to integrate a current output from a photoelectric converter to calculate a second electrical charge. The switcher is configured to, when a pileup phenomenon has occurred, perform switching either to a state in which the first and second electrical charges are output or to a state in which the first electrical charge and a reference charge are output. The calculator is configured to calculate a first difference charge between the first and second electrical charges, and calculate a second difference charge between the first electrical charge and the reference charge.
摘要翻译： 根据实施例，信号处理装置包括第一积分器，第二积分器，切换器和计算器。 在没有关于电流的堆积现象的情况下，第一积分器被配置为集成由与正常波形相当的参考波形表示的电流，以计算第一电荷。 第二积分器被配置为集成来自光电转换器的电流输出以计算第二电荷。 切换器被配置为当发生堆积现象时，执行切换到其中输出第一和第二电荷的状态或者输出第一电荷和参考电荷的状态。 计算器被配置为计算第一和第二电荷之间的第一差分电荷，并且计算第一电荷和参考电荷之间的第二差分电荷。
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公开(公告)号：US20150309188A1
公开(公告)日：2015-10-29
申请号：US14648735
申请日：2013-12-12
摘要： The invention relates to a detector unit (100) for the detection of photons of incident radiation. The detector unit (100) comprises a signal processing circuit (40, 50, 60) for generating signals (V0) that are dependent on the energy of a currently detected photon (X) and at least one processing-parameter (Rf). Moreover, it comprises a flux estimator (70) for estimating the flux of photons and for adjusting the processing-parameter (Rf) based on said estimated flux. The flux estimator (70) receives its input (Vi), from which the flux of photons is estimated, from a processing stage that is independent of the output of the signal processing circuit. In a preferred embodiment, the signal processing circuit is or comprises a shaper (40).
摘要翻译： 本发明涉及一种用于检测入射辐射光子的检测器单元（100）。 检测器单元（100）包括用于产生取决于当前检测到的光子（X）的能量和至少一个处理参数（Rf）的信号（V0）的信号处理电路（40,50,60）。 此外，其包括用于估计光子通量的通量估计器（70），并且用于基于所述估计的通量来调整处理参数（Rf）。 通量估计器（70）从独立于信号处理电路的输出的处理级接收其输入（Vi），从其估计光子通量。 在优选实施例中，信号处理电路是或包括整形器（40）。
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公开(公告)号：US09128194B2
公开(公告)日：2015-09-08
申请号：US13866695
申请日：2013-04-19
发明人： Yu Zou , Xiaolan Wang , Chunguang Cao , Miesher L. Rodrigues , Yuexing Zhang , Daniel Gagnon
IPC分类号： G01T1/17
CPC分类号： G01T1/171 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/5205
摘要： A method and apparatus for determining a parameter vector that includes a plurality of parameters of a detector pileup model of a photon-counting detector, the detector pileup model being used for pileup correction for a spectral computed-tomography scanner. The method includes setting values of the parameters, the parameters including a dead time parameter and individual probabilities of different pileup events, the probabilities including a probability of single photon events, a probability of double quasi-coincident photon events, and a probability of at least three quasi-coincident photon events. The method include determining, using (1) a detector response model, (2) an incident spectrum, and (3) the set values of the parameter vector, a plurality of component spectra, each component spectrum corresponding to one of the individual probabilities of the different pileup events, and summing the plurality of component spectra to generate an output spectrum.
摘要翻译： 一种用于确定包括光子计数检测器的检测器堆积模型的多个参数的参数矢量的方法和装置，所述检测器堆积模型用于光谱计算机断层扫描仪的堆积校正。 该方法包括设置参数的值，包括死区时间参数和不同堆积事件的单个概率的参数，包括单个光子事件的概率，双重准同步光子事件的概率以及至少的概率的概率 三个准同步光子事件。 该方法包括使用（1）检测器响应模型来确定（2）入射光谱，以及（3）参数矢量的设定值，多个分量光谱，每个分量光谱对应于单个概率之一 不同的堆积事件，并且对多个分量光谱求和以产生输出光谱。
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