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公开(公告)号：US5661774A
公开(公告)日：1997-08-26
申请号：US671202
申请日：1996-06-27
CPC分类号： H05G1/34 , G01N23/046 , G01V5/0041 , H05G1/26 , G01N2223/419
摘要： The disclosed dual energy baggage scanning assembly includes a CT scanning system, and a conveyor belt for transporting items through the CT scanning system, and an improved power supply for the X-ray source of the CT scanner so that a dual energy beam is provided. The power supply alternately powers the X-ray tube of the scanning system at high and low voltage levels at a predetermined rate and comprises at least one high voltage DC power supply for providing a stable, high DC voltage the X-ray tube; means, including at least one waveform generator, for providing a periodic time varying waveform; and coupling means, including a transformer, for coupling the waveform generator to said DC voltage supply so that the total voltage across the cathode and anode of the tube is periodically changed between the high and low voltage levels at the predetermined rate in response to the periodic time varying waveform provided by the waveform generator.
摘要翻译： 所公开的双能量行李扫描组件包括CT扫描系统和用于通过CT扫描系统传送物品的传送带，以及用于CT扫描器的X射线源的改进的电源，从而提供双能量束。 电源以预定的速率以高低电压交替地对扫描系统的X射线管供电，并且包括至少一个用于提供X射线管的稳定的高DC电压的高压DC电源; 包括至少一个波形发生器的装置，用于提供周期性的时变波形; 以及包括变压器的耦合装置，用于将波形发生器耦合到所述DC电压源，使得响应于周期性的，以预定速率在管道的阴极和阳极之间的两端的总电压在高电压电平和低电压电平之间周期性地变化 由波形发生器提供的时变波形。
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2.发明授权Method of and apparatus for power management and distribution in a medical imaging system 失效医疗成像系统中电源管理和分配的方法和装置
公开(公告)号：US5808376A
公开(公告)日：1998-09-15
申请号：US877972
申请日：1997-06-18
申请人： Bernard M. Gordon , Iosif Izrailit
发明人： Bernard M. Gordon , Iosif Izrailit
IPC分类号： G01T1/161 , A61B5/055 , A61B6/03 , G01T1/175 , G06F1/26 , H02J1/02 , H02J1/10 , H02J9/00 , H02J9/06 , H05G1/02
CPC分类号： G01T1/175 , H02J1/02 , H02J1/10 , H02J9/061 , H02J9/062 , A61B6/03 , A61B6/56 , Y10T307/615 , Y10T307/625 , Y10T307/658 , Y10T307/724 , Y10T307/729
摘要： An apparatus for energizing a large scale medical imaging system, preferably in the form of a CT scanner so that the scanner operates off an uninterruptable power supply in the event that the external power falls below sufficient power to operate the system so that system operation remains uninterruptable. The system is designed to operate off a broad range and types of external power supplies including those providing DC, single or three phase AC power. The system therefore can operate from a common single phase AC outlet. In addition, power factor correction is provided so that the system can correct for phase differences between the voltage and current at the input line created by the input impedance of the system.
摘要翻译： 一种用于对大规模医疗成像系统进行激励的装置，优选地以CT扫描器的形式，使得在外部功率低于足够的功率以操作系统的情况下，扫描仪操作不间断电源，使得系统操作保持不间断 。 该系统设计用于广泛范围和类型的外部电源，包括提供直流，单相或三相交流电源的外部电源。 因此，该系统可以从普通的单相交流电源插座进行操作。 另外，提供了功率因数校正，使得系统可以校正由系统的输入阻抗产生的输入线路处的电压和电流之间的相位差。
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3.发明授权Data acquisition system using delta-sigma analog-to-digital signal converters 失效采用delta-sigma模数转换器的数据采集系统公开(公告)号：US06657571B2
公开(公告)日：2003-12-02
申请号：US09874769
申请日：2001-06-05
申请人： Bernard M. Gordon , Hans Weedon , Louis R. Poulo , Mark H. Miller
发明人： Bernard M. Gordon , Hans Weedon , Louis R. Poulo , Mark H. Miller
IPC分类号： H03M300
摘要： A delta-sigma A/D converter includes a delta-sigma modulator having an integrating amplifier dispose within the loop of the modulator so that the input of the modulator can be connected to receive relatively low level input currents, and so as to improve DC stability. The modulator is specifically adapted for IC implementation for use in a DAS of a CT scanner so that the current output of a detector of the scanner can be connected directly to the input of the modulator of the converter. The noise shaping characteristics are shaped so as to provide an improved frequency response with minimal spillover. Noise shaping of the converter is provided throughout the dynamic range of the current outputs of CT scanner detectors so as to compensate for the poorer S/N for low input currents. The preferred converter also includes a unique digital filter transfer function, with finite impulse response (FIR) filter characteristics, optimized for CT-DAS applications and having excellent characteristics in the frequency domain and the time domain.
摘要翻译： Δ-ΣA / D转换器包括具有集成放大器的Δ-Σ调制器，其布置在调制器的环路内，使得调制器的输入可以被连接以接收相对低电平的输入电流，并且从而提高DC稳定性 。 该调制器特别适用于CT实施用于CT扫描器的DAS，使得扫描仪的检测器的电流输出可以直接连接到转换器的调制器的输入端。 噪声整形特性的形状使得以最小的溢出提供改进的频率响应。 在CT扫描仪检测器的电流输出的动态范围内提供转换器的噪声整形，以补偿低输入电流的较差的S / N。 优化的转换器还包括独特的数字滤波器传递功能，具有有限脉冲响应（FIR）滤波器特性，针对CT-DAS应用优化，并且在频域和时域中具有优异的特性。
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4.发明授权Data acquisition system using delta-sigma analog-to-digital signal converters 有权采用delta-sigma模数转换器的数据采集系统公开(公告)号：US06252531B1
公开(公告)日：2001-06-26
申请号：US09243708
申请日：1999-02-03
申请人： Bernard M. Gordon , Hans Weedon , Louis R. Poulo , Mark H. Miller
发明人： Bernard M. Gordon , Hans Weedon , Louis R. Poulo , Mark H. Miller
IPC分类号： H03M300
摘要： A delta-sigma A/D converter includes a delta-sigma modulator having an integrating amplifier dispose within the loop of the modulator so that the input of the modulator can be connected to receive relatively low level input currents, and so as to improve DC stability. The modulator is specifically adapted for IC implementation for use in a DAS of a CT scanner so that the current output of a detector of the scanner can be connected directly to the input of the modulator of the converter. The noise shaping characteristics are shaped so as to provide an improved frequency response with minimal spillover. Noise shaping of the converter is provided throughout the dynamic range of the current outputs of CT scanner detectors so as to compensate for the poorer S/N for low input currents. The preferred converter also includes a unique digital filter transfer function, with finite impulse response (FIR) filter characteristics, optimized for CT-DAS applications and having excellent characteristics in the frequency domain and the time domain.
摘要翻译： Δ-ΣA / D转换器包括具有集成放大器的Δ-Σ调制器，其布置在调制器的环路内，使得调制器的输入可以被连接以接收相对低电平的输入电流，并且从而提高DC稳定性 。 该调制器特别适用于CT实施用于CT扫描器的DAS，使得扫描仪的检测器的电流输出可以直接连接到转换器的调制器的输入端。 噪声整形特性的形状使得以最小的溢出提供改进的频率响应。 在CT扫描仪检测器的电流输出的动态范围内提供转换器的噪声整形，以补偿低输入电流的较差的S / N。 优化的转换器还包括独特的数字滤波器传递功能，具有有限脉冲响应（FIR）滤波器特性，针对CT-DAS应用优化，并且在频域和时域中具有优异的特性。
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公开(公告)号：US5577026A
公开(公告)日：1996-11-19
申请号：US174664
申请日：1993-12-28
CPC分类号： H04L25/0266 , H01Q1/38 , H01Q3/02 , A61B6/56
摘要： An apparatus is provided for transferring data between a first device and a second device, the second device being adapted to rotate with respect to the first device. The first device includes a first antenna assembly and a first transceiver assembly for transmitting and receiving signals via the first antenna assembly. The second device includes a second antenna assembly and a second transceiver assembly for transmitting and receiving signals via the second antenna assembly. The rotating antenna assembly is mounted circumferentially about the second device such that the stationary antenna is in capacitive coupling relationship substantially through an entire revolution of the second device. The apparatus is particularly useful in a CT scanner where data is transmitted from the first device to the second device via a single channel, and data is transmitted from the second device to the first device via two time-multiplexed channels so as to provide high speed data transfer from the second device to the first device at twice the rate of data transfer from the first device to the second device. The invention includes a variety of features for significantly reducing error rates, and particularly for reducing errors due to cross talk between channels.
摘要翻译： 提供了一种用于在第一设备和第二设备之间传送数据的设备，第二设备适于相对于第一设备旋转。 第一装置包括第一天线组件和用于经由第一天线组件发送和接收信号的第一收发机组件。 第二装置包括第二天线组件和用于经由第二天线组件发送和接收信号的第二收发器组件。 旋转天线组件围绕第二装置周向安装，使得固定天线基本上通过第二装置的整个转动处于电容耦合关系。 该装置在CT扫描器中特别有用，其中数据经由单个信道从第一设备发送到第二设备，并且数据经由两个时间复用信道从第二设备传输到第一设备，以便提供高速 以从第一设备到第二设备的数据传输速率的两倍的数据从第二设备传送到第一设备。 本发明包括用于显着降低错误率的各种特征，特别是用于减少由于通道之间的串扰造成的错误。
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6.发明授权X-ray tomography system for and method of improving the quality of a scanned image 失效X射线断层摄影系统以及提高扫描图像质量的方法
公开(公告)号：US5768331A
公开(公告)日：1998-06-16
申请号：US653113
申请日：1996-05-24
申请人： Bernard M. Gordon , John Dobbs , David Banks
发明人： Bernard M. Gordon , John Dobbs , David Banks
CPC分类号： A61B6/4078 , A61B6/032 , A61B6/4028 , A61B6/4411 , A61B6/4452 , A61B6/5264 , G01N23/046 , G01N2223/419
摘要： A scanning tomography system has a gantry including a disk for supporting a X-ray source and detector array and rotatable about a central axis. Multiple scans are made to reduce the effects of motion artifacts and improve image quality. In addition, the detector array is supported by a suspension system and is movable about the focal spot of the X-ray source a small amount so that in one mode of operation the detector array can be shifted at a predetermined angle from one position to at least one other position during a scan so as to provide an increase in the number of unique X-ray paths so as to provide improved image quality. In a second mode of operation, the detector array can be offset from the center ray so as to provide a quarter of a detector offset.
摘要翻译： 扫描断层摄影系统具有包括用于支撑X射线源和检测器阵列并且可围绕中心轴线旋转的盘的台架。 进行多次扫描以减少运动伪影的影响并提高图像质量。 此外，检测器阵列由悬挂系统支撑，并且可以在X射线源的焦点附近移动少量，使得在一种操作模式中，检测器阵列可以从一个位置移动到预定角度 在扫描期间至少一个其他位置，以提供唯一X射线路径的数量的增加，以便提供改进的图像质量。 在第二种操作模式中，检测器阵列可偏离中心射线，从而提供四分之一的检测器偏移。
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公开(公告)号：US4569028A
公开(公告)日：1986-02-04
申请号：US507472
申请日：1983-06-24
摘要： An adaptive digitizer circuit for an information processing system includes an entropy filter responsive to an information signal V having a variable noise .sigma..sub.V that is a function of V, for providing a transform signal T, having a constant transform noise level .sigma..sub.T throughout its dynamic range; and an analog to digital converter in which the ratio .sigma..sub.T /.delta..sub.T of the noise level .sigma..sub.T of the transformed signal and the digitization interval .delta..sub.T is constant throughout the dynamic range of T.
摘要翻译： 用于信息处理系统的自适应数字转换器电路包括响应于具有作为V的函数的可变噪声ΣV的信息信号V的熵滤波器，用于提供变换信号T，其在整个动态中具有恒定的变换噪声电平sigma T 范围; 以及模拟数字转换器，其中变换信号的噪声电平sigma T与数字化间隔delta T的比率ΣT /ΔT在T的整个动态范围内是恒定的。
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公开(公告)号：US4152659A
公开(公告)日：1979-05-01
申请号：US835968
申请日：1977-09-23
申请人： Bernard M. Gordon
发明人： Bernard M. Gordon
IPC分类号： H03F3/45
CPC分类号： H03F3/45 , H03F2200/261
摘要： A low noise differential amplifier circuit which requires only two operational amplifiers and which has lower noise than conventional differential amplifiers. An alternate embodiment is disclosed including circuitry for autozeroing the amplifier.
摘要翻译： 低噪声差分放大器电路，只需要两个运算放大器，噪声比传统的差分放大器低。 公开了一种替代实施例，其包括用于使该放大器自动调零的电路。
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公开(公告)号：US4002964A
公开(公告)日：1977-01-11
申请号：US618784
申请日：1975-10-02
申请人： Bernard M. Gordon
发明人： Bernard M. Gordon
CPC分类号： G05F1/567
摘要： A temperature compensation system and technique requiring no measurement of actual temperature differential and wherein each source of thermal error in an electronic circuit can be corrected in addition to overall thermal error. Two reference voltages are provided having equal and opposite temperature response and having a null value at selected normal temperature. A respective correcting voltage is derived from the two reference voltages for each source of thermal error and each of magnitude and polarity to compensate for the corresponding thermal error. A correcting voltage can also be derived for compensation of overall residual thermal error.
摘要翻译： 不需要测量实际温差的温度补偿系统和技术，除了总体热误差之外，还可以校正电子电路中的每个热误差源。 提供两个参考电压具有相同和相反的温度响应，并且在选定的常温下具有零值。 从每个热误差源的两个参考电压导出相应的校正电压，并且每个幅度和极性都补偿相应的热误差。 还可以导出校正电压来补偿总体残余热误差。
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公开(公告)号：US07431500B2
公开(公告)日：2008-10-07
申请号：US10814992
申请日：2004-03-31
IPC分类号： G01D18/00 , G01N23/083 , H05G1/64 , H05G1/32
摘要： A method and system is presented in radiography for optimizing image quality of an object (e.g. an anatomical region of a patient), while minimizing the radiation dose to the patient. X-ray exposure parameters, such as operating voltage (kVp), operating current (mA), focal spot size, and soft x-ray filter combination, are dynamically controlled during the x-ray exposure. During at least two different sampling intervals and at two different kVp levels, x-rays are passed through the object, and detected by sensors located between the object and the image plane. After the last sampling interval, the sensor output signals and the measured thickness of the object are used to evaluate the optimal settings for the x-ray exposure parameters. The x-ray exposure parameters are set to these optimal settings for the remainder of the exposure period.
摘要翻译： 在用于优化对象（例如患者的解剖区域）的图像质量的放射线照相中呈现方法和系统，同时使对患者的辐射剂量最小化。 在X射线曝光期间动态控制X射线曝光参数，例如工作电压（kVp），工作电流（mA），焦点尺寸和软x射线滤光器组合。 在至少两个不同的采样间隔和两个不同的kVp级别，x射线通过物体，并由位于物体和像面之间的传感器检测。 在最后一个采样间隔之后，传感器输出信号和物体的测量厚度用于评估x射线曝光参数的最佳设置。 在曝光期间的其余部分，将x射线曝光参数设置为这些最佳设置。
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