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公开(公告)号：US07809103B2
公开(公告)日：2010-10-05
申请号：US11756027
申请日：2007-05-31
IPC分类号： G01N23/087
CPC分类号： G01N23/09
摘要： Disclosed herein is a method for detecting high atomic number elements in an article by using radiation having two different energies. The detecting of high atomic number elements can be accomplished by using an algorithm, curve fitting or using a data table. Disclosed herein too is a radiation system that uses the aforementioned method for detecting high atomic number elements.
摘要翻译： 本文公开了一种通过使用具有两种不同能量的辐射来检测物品中的高原子数元素的方法。 高原子数元素的检测可以通过使用算法，曲线拟合或使用数据表来完成。 这里也公开了使用上述检测高原子数元素的方法的辐射系统。
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62.发明申请公开(公告)号：US20090132789A1
公开(公告)日：2009-05-21
申请号：US12199039
申请日：2008-08-27
IPC分类号： G06F15/76
摘要： An application-specific integrated circuit (ASIC) comprising a plurality of channels, each channel having circuitry for time and energy discrimination, a plurality of programmable registers, each programmable register configured to output at least one configuration parameter for the circuitry, and a channel-select register configured to identify a channel of the plurality of channels to be configured. The ASIC further includes a configuration-select register configured to identify the programmable register to be used for channel configuration, and a communications interface configured to transmit instructions received from a controller to one of the channel-select register, the configuration-select register, and the plurality of programmable registers.
摘要翻译： 一种专用集成电路（ASIC），包括多个通道，每个通道具有用于时间和能量鉴别的电路，多个可编程寄存器，每个可编程寄存器被配置为输出用于该电路的至少一个配置参数， 选择寄存器，其被配置为识别要配置的多个信道的信道。 ASIC还包括配置选择寄存器，配置为识别要用于信道配置的可编程寄存器，以及通信接口，被配置为将从控制器接收的指令发送到频道选择寄存器，配置选择寄存器和 多个可编程寄存器。
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63.发明申请DATA ACQUISITION SYSTEM FOR PHOTON COUNTING AND ENERGY DISCRIMINATING DETECTORS 有权用于光电计数和能量鉴别检测器的数据采集系统公开(公告)号：US20090129537A1
公开(公告)日：2009-05-21
申请号：US12198989
申请日：2008-08-27
CPC分类号： G06G7/18
摘要： A data acquisition system including a readout Application Specific Integrated Circuit (ASIC) having a plurality of channels, each channel having a time discriminating circuit and an energy discriminating circuit, wherein the ASIC is configured to receive a plurality of signals from a semiconductor radiation detector. The data acquisition system also includes a digital-to-analog converter (DAC) electrically coupled to the ASIC and configured to provide a reference signal to the ASIC used in the generation of digital outputs from the ASIC, and a controller electrically coupled to the ASIC and to the DAC, the controller configured to instruct the DAC to provide the reference signal to the ASIC.
摘要翻译： 一种数据采集系统，包括具有多个通道的读出专用集成电路（ASIC），每个通道具有时间鉴别电路和能量识别电路，其中ASIC被配置为从半导体辐射检测器接收多个信号。 数据采集系统还包括电耦合到ASIC的数模转换器（DAC），并被配置为向ASIC中产生数字输出使用的ASIC提供参考信号，以及电耦合到ASIC的控制器 并且所述控制器被配置为指示所述DAC向所述ASIC提供所述参考信号。
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64.发明申请DIRECT CONVERSION ENERGY DISCRIMINATING CT DETECTOR WITH OVER-RANGING CORRECTION 有权直接转换能量分辨率超过范围校正的CT检测器公开(公告)号：US20070248209A1
公开(公告)日：2007-10-25
申请号：US11768775
申请日：2007-06-26
申请人： David Hoffman , James LeBlanc , John Tkaczyk , Robert Senzig , Yanfeng Du
发明人： David Hoffman , James LeBlanc , John Tkaczyk , Robert Senzig , Yanfeng Du
IPC分类号： G01N23/00
CPC分类号： G01T1/2928 , A61B6/032 , A61B6/4241 , A61B6/5205
摘要： A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
摘要翻译： 公开了能够鉴别和直接转换的CT检测器。 检测器包括多层半导体材料，其中层具有变化的厚度。 检测器被构造成在x射线穿透方向上分段，以便优化计数率性能以及避免饱和。 检测器还包括可变像素间距和灵活的像素分组，以进一步提高计数率性能。
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65.发明授权公开(公告)号：US07065234B2
公开(公告)日：2006-06-20
申请号：US10784099
申请日：2004-02-23
申请人： Yanfeng Du , Forrest Frank Hopkins
发明人： Yanfeng Du , Forrest Frank Hopkins
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , A61B6/5282
摘要： A method of correcting scatter includes obtaining a voxellized representation of a 3D image of an object from a plurality of projection data. A single scatter profile for the object is calculated using the voxellized representation of the 3D image of the object. A total scatter profile for the object is determined using the single scatter profile and an adjustment factor and the projection data is corrected using the total scatter profile to obtain a scatter corrected projection data. A beam hardening correction method includes simulating a number of attenuation data for an x-ray spectrum, at least one object material, and a detector spectral response. A function is fitted to the attenuation data to obtain an attenuation curve. A number of projection data for an object are corrected using the attenuation curve to obtain a number of beam hardening corrected projection data. A corrected image of the object is reconstructed from the beam hardening corrected image data.
摘要翻译： 校正散射的方法包括从多个投影数据获得对象的3D图像的体素化表示。 使用对象的3D图像的体素化表示来计算对象的单个散点图。 使用单个散射曲线和调整因子确定对象的总散射曲线，并且使用总散射曲线校正投影数据以获得散射校正的投影数据。 光束硬化校正方法包括模拟用于X射线光谱，至少一种物体材料和检测器光谱响应的多个衰减数据。 对衰减数据拟合一个函数以获得衰减曲线。 使用衰减曲线来校正用于对象的多个投影数据，以获得多个光束硬化校正投影数据。 从光束硬化校正图像数据重建对象的校正图像。
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66.发明申请公开(公告)号：US20050185753A1
公开(公告)日：2005-08-25
申请号：US10784099
申请日：2004-02-23
申请人： Yanfeng Du , Forrest Hopkins
发明人： Yanfeng Du , Forrest Hopkins
CPC分类号： G06T11/005 , A61B6/5282
摘要： A method of correcting scatter includes obtaining a voxellized representation of a 3D image of an object from a plurality of projection data. A single scatter profile for the object is calculated using the voxellized representation of the 3D image of the object. A total scatter profile for the object is determined using the single scatter profile and an adjustment factor and the projection data is corrected using the total scatter profile to obtain a scatter corrected projection data. A beam hardening correction method includes simulating a number of attenuation data for an x-ray spectrum, at least one object material, and a detector spectral response. A function is fitted to the attenuation data to obtain an attenuation curve. A number of projection data for an object are corrected using the attenuation curve to obtain a number of beam hardening corrected projection data. A corrected image of the object is reconstructed from the beam hardening corrected image data.
摘要翻译： 校正散射的方法包括从多个投影数据获得对象的3D图像的体素化表示。 使用对象的3D图像的体素化表示来计算对象的单个散点图。 使用单个散射曲线和调整因子确定对象的总散射曲线，并且使用总散射曲线校正投影数据以获得散射校正的投影数据。 光束硬化校正方法包括模拟用于X射线光谱，至少一种物体材料和检测器光谱响应的多个衰减数据。 对衰减数据拟合一个函数以获得衰减曲线。 使用衰减曲线来校正用于对象的多个投影数据，以获得多个光束硬化校正投影数据。 从光束硬化校正图像数据重建对象的校正图像。
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67.发明授权Systems and methods for generating control signals in radiation detector systems 有权用于在辐射探测器系统中产生控制信号的系统和方法公开(公告)号：US08610081B2
公开(公告)日：2013-12-17
申请号：US13304255
申请日：2011-11-23
IPC分类号： G01J1/42
CPC分类号： G01T1/247
摘要： Systems and methods for generating control signal in radiation detector systems are provided. One system includes a scheduling architecture having at least one anode channel connected to a detector of the radiation detector system. The anode channel includes a charge sensitive amplifier and a signal shaper, wherein the anode channel is configured to generate at least one control signal to control data acquisition by the detector. The scheduling architecture also includes at least one shaper timer configured having a time constant to define timing for the generation of the control signal without using a clock.
摘要翻译： 提供了用于在辐射探测器系统中产生控制信号的系统和方法。 一个系统包括具有连接到辐射探测器系统的检测器的至少一个阳极通道的调度架构。 阳极通道包括电荷敏感放大器和信号整形器，其中阳极通道被配置为产生至少一个控制信号以控制检测器的数据采集。 调度架构还包括至少一个整形器定时器，其被配置为具有时间常数以定义用于生成控制信号的定时而不使用时钟。
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68.发明申请SYSTEMS AND METHODS FOR GENERATING CONTROL SIGNALS IN RADIATION DETECTOR SYSTEMS 有权用于在辐射检测系统中产生控制信号的系统和方法公开(公告)号：US20130126748A1
公开(公告)日：2013-05-23
申请号：US13304255
申请日：2011-11-23
CPC分类号： G01T1/247
摘要： Systems and methods for generating control signal in radiation detector systems are provided. One system includes a scheduling architecture having at least one anode channel connected to a detector of the radiation detector system. The anode channel includes a charge sensitive amplifier and a signal shaper, wherein the anode channel is configured to generate at least one control signal to control data acquisition by the detector. The scheduling architecture also includes at least one shaper timer configured having a time constant to define timing for the generation of the control signal without using a clock.
摘要翻译： 提供了用于在辐射探测器系统中产生控制信号的系统和方法。 一个系统包括具有连接到辐射探测器系统的检测器的至少一个阳极通道的调度架构。 阳极通道包括电荷敏感放大器和信号整形器，其中阳极通道被配置为产生至少一个控制信号以控制检测器的数据采集。 调度架构还包括至少一个整形器定时器，其被配置为具有时间常数以定义用于生成控制信号的定时而不使用时钟。
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69.发明授权公开(公告)号：US08159286B2
公开(公告)日：2012-04-17
申请号：US12199020
申请日：2008-08-27
IPC分类号： H03K5/00
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。
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70.发明授权Data acquisition system for photon counting and energy discriminating detectors 有权用于光子计数和能量鉴别检测器的数据采集系统公开(公告)号：US07760123B2
公开(公告)日：2010-07-20
申请号：US12198989
申请日：2008-08-27
IPC分类号： H03M1/12
CPC分类号： G06G7/18
摘要： A data acquisition system including a readout Application Specific Integrated Circuit (ASIC) having a plurality of channels, each channel having a time discriminating circuit and an energy discriminating circuit, wherein the ASIC is configured to receive a plurality of signals from a semiconductor radiation detector. The data acquisition system also includes a digital-to-analog converter (DAC) electrically coupled to the ASIC and configured to provide a reference signal to the ASIC used in the generation of digital outputs from the ASIC, and a controller electrically coupled to the ASIC and to the DAC, the controller configured to instruct the DAC to provide the reference signal to the ASIC.
摘要翻译： 一种数据采集系统，包括具有多个通道的读出专用集成电路（ASIC），每个通道具有时间鉴别电路和能量识别电路，其中ASIC被配置为从半导体辐射检测器接收多个信号。 数据采集系统还包括电耦合到ASIC的数模转换器（DAC），并被配置为向ASIC中产生数字输出使用的ASIC提供参考信号，以及电耦合到ASIC的控制器 并且所述控制器被配置为指示所述DAC向所述ASIC提供所述参考信号。
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