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1. 发明授权

US5661774A Dual energy power supply 失效
标题翻译：双能源供电
公开(公告)号：US5661774A
公开(公告)日：1997-08-26
申请号：US671202
申请日：1996-06-27
申请人： Bernard M. Gordon , Hans Weedon , Iosif Izrailit , Timothy R. Fox , John F. Moore
发明人： Bernard M. Gordon , Hans Weedon , Iosif Izrailit , Timothy R. Fox , John F. Moore
IPC分类号： G01N23/18 , G01N23/04 , G01V5/00 , G21K5/02 , H05G1/26 , H05G1/32 , H05G1/34 , H05G1/10
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。

2. 发明申请

US20100310042A1 Method and Apparatus to Facilitate Using Multiple Radiation-Detection Views to Differentiate One Material From Another 有权
标题翻译：使用多个辐射检测视图来区分一种材料的方法和装置
公开(公告)号：US20100310042A1
公开(公告)日：2010-12-09
申请号：US12479376
申请日：2009-06-05
申请人： Timothy R. Fox , Gongyin Chen , Kevin M. Holt , Paul J. Bjorkholm , David T. Nisius
发明人： Timothy R. Fox , Gongyin Chen , Kevin M. Holt , Paul J. Bjorkholm , David T. Nisius
IPC分类号： G01N23/06
CPC分类号： G01N23/046 , A61B6/4035 , A61B6/4241 , G01N2223/419
摘要： At least three radiation-detection views are used to facilitate identifying material as comprises an object being assessed along a beam path relative to that object. This comprises developing a first radiation-detection view (101) as corresponds to the material along the beam path, a second radiation-detection view (102) as corresponds to the material along substantially the beam path, and at least a third radiation-detection view (103) as corresponds to the material along substantially the beam path. At least one of the source spectra and detector spectral responses used for these radiation-detection views are different from one another for each view. One then uses (104) these radiation-detection views to identify the material by, at least in part, differentiating the material from other possible materials.
摘要翻译：使用至少三个辐射检测视图来促进将材料识别为包括沿着相对于该物体的光束路径被评估的物体。这包括显影对应于沿着光束路径的材料的第一辐射检测视图（101），对应于沿着基本上光束路径的材料的第二辐射检测视图（102）和至少第三辐射检测视图（103）对应于沿着基本上光束路径的材料。用于这些辐射检测视图的源光谱和检测器光谱响应中的至少一个对于每个视图彼此不同。然后，使用（104）这些辐射检测视图来至少部分地将材料与其他可能材料区分开来识别材料。

3. 发明授权

US07780352B2 Radiation system and radiation beam quality detector and method 有权
标题翻译：辐射系统和辐射束质量检测器及方法
公开(公告)号：US07780352B2
公开(公告)日：2010-08-24
申请号：US12048005
申请日：2008-03-13
申请人： Timothy R. Fox , David T. Nisius
发明人： Timothy R. Fox , David T. Nisius
IPC分类号： G01D18/00
CPC分类号： G03B42/02 , A61B6/4035 , A61B6/482 , A61B6/583 , G01T7/005 , H05G1/46
摘要： A detector array is disposed relative to a radiation source such that radiation from the radiation source over a predetermined time period is substantially similar across the detector array. The detector array includes radiation detectors operatively coupled to detector electronics. The radiation filter material is disposed at least partially between the radiation source and the detector array such that different portions of the detector array are exposed to radiation from the radiation source through either different radiation filter material thicknesses or different radiation filter material compositions during the predetermined time period. So configured, information regarding the radiation such as beam quality information for radiation pulses is collected and used to confirm the quality of the radiation source or to adjust data collected by the radiation system.
摘要翻译：检测器阵列相对于辐射源设置，使得来自辐射源的预定时间周期的辐射在检测器阵列上基本相似。检测器阵列包括可操作地耦合到检测器电子装置的辐射探测器。放射线过滤材料至少部分地设置在辐射源和检测器阵列之间，使得检测器阵列的不同部分在预定时间内通过不同的辐射过滤材料厚度或不同的辐射过滤材料组合物暴露于来自辐射源的辐射期。如此配置，收集关于辐射的诸如辐射脉冲的光束质量信息的信息，并用于确认辐射源的质量或调整由辐射系统收集的数据。

4. 发明授权

US5144243A RF coil system for use in magnetic resonance imaging apparatus 失效
标题翻译：用于磁共振成像装置的RF线圈系统
公开(公告)号：US5144243A
公开(公告)日：1992-09-01
申请号：US654183
申请日：1991-02-13
申请人： Kazuto Nakabayashi , Timothy R. Fox
发明人： Kazuto Nakabayashi , Timothy R. Fox
IPC分类号： A61B5/055 , G01R33/34 , G01R33/3415
CPC分类号： G01R33/3415
摘要： An RF coil system, used for a magnetic resonance imaging apparatus and adapted to perform at least one of application of an excitation high-frequency magnetic field and detection of magnetic resonance signals, comprises a plurality of coil elements arranged at regularly spaced intervals without overlap therebetween, an RF circuit for putting at least one of the coil elements into an operative state or an inoperative state, a neutralizing circuit for neutralizing inductive coupling between the coil elements, a tuning circuit for tuning at least one of the coil elements to a given frequency, an adder circuit for adding an output signal of the tuning circuit and conductors for electrically connecting the coil elements, the RF circuit, the neutralizing circuit and the adder circuit.
摘要翻译：用于磁共振成像装置并适于执行激发高频磁场的施加和磁共振信号检测中的至少一个的RF线圈系统包括以规则间隔的间隔排列而不重叠的多个线圈元件用于将至少一个线圈元件置于操作状态或非工作状态的RF电路，用于中和线圈元件之间的感应耦合的中和电路，用于将至少一个线圈元件调谐到给定频率的调谐电路，用于将调谐电路的输出信号和用于电连接线圈元件，RF电路，中和电路和加法器电路的导体相加的加法器电路。

5. 发明授权

US4612596A Circuit for stabilizing electromagnet coil current of a magnetic resonance imaging device 失效
标题翻译：用于稳定磁共振成像装置的电磁线圈电流的电路
公开(公告)号：US4612596A
公开(公告)日：1986-09-16
申请号：US712736
申请日：1985-03-18
申请人： Timothy R. Fox
发明人： Timothy R. Fox
IPC分类号： G01R33/389 , G05F7/00 , H01F7/06 , G01R33/22 , H01F7/20
CPC分类号： H01F7/064 , G01R33/389 , G05F7/00
摘要： A circuit for stabilizing the electromagnet coil current of a magnetic resonant imaging device is provided which comprises a variable DC power supply coupled to provide current through the series combination of the primary winding of a DC current transformer, the electromagnet coil of the magnetic resonance imaging device, and a sense resistor. Changes in voltage across the sense resistor are monitored to provide rapid reaction to changes in the electromagnet coil current and the output of the DC current transformer is monitored to detect the absolute value of the electromagnet coil current. These two monitored signals are used to control the DC power supply in a manner which stabilizes the resultant electromagnet coil current.
摘要翻译：提供一种用于稳定磁共振成像装置的电磁线圈电流的电路，其包括可变直流电源，可变直流电源耦合以提供电流通过直流电流互感器的初级绕组，磁共振成像装置的电磁线圈和感测电阻器。监测检测电阻两端的电压变化，对电磁线圈电流的变化作出快速反应，监控直流电流互感器的输出，以检测电磁线圈电流的绝对值。这两个监控信号用于以稳定所得电磁线圈电流的方式控制直流电源。

6. 发明授权

US08565380B2 Method and apparatus pertaining to use of a switched voltage clamp with an x-ray detector amplifier 有权
标题翻译：关于使用具有x射线检测放大器的开关电压钳的方法和装置
公开(公告)号：US08565380B2
公开(公告)日：2013-10-22
申请号：US12898235
申请日：2010-10-05
申请人： Timothy R. Fox
发明人： Timothy R. Fox
IPC分类号： H05G1/08
CPC分类号： G01T1/17
摘要： An x-ray detector amplifier operably couples to an analog-to-digital converter interface and a switched voltage clamp is operably disposed there between. By one approach, the switched voltage clamp comprises a switched electrical connection to a constant potential (such as, but not limited to, ground). These teachings will accommodate a control circuit configured to control the switched voltage clamp. This can comprise, for example, controlling the switched voltage clamp in synchronicity with the pulsed x-ray source. These teachings will also accommodate an integrator operably connected between the x-ray detector amplifier and the analog-to-digital converter interface. In such a case, the switched voltage clamp and be controlled to remove substantially any voltage offset contribution of the x-ray detector amplifier (due, for example, to significant temperature excursions) to a signal that is integrated by the aforementioned integrator.
摘要翻译： X射线检测器放大器可操作地耦合到模数转换器接口，并且切换电压钳可操作地设置在其间。通过一种方法，开关电压钳包括一个转换电连接到恒定电位（例如但不限于地电位）。这些教导将容纳配置成控制开关电压钳位的控制电路。这可以包括例如与脉冲X射线源同步地控制开关电压钳位。这些教导还将容纳可操作地连接在x射线检测器放大器和模数转换器接口之间的积分器。在这种情况下，开关电压钳位并被控制以将x射线检测器放大器的基本上任何电压偏移贡献（由于例如到显着的温度漂移）移除到由上述积分器集成的信号。

7. 发明授权

US5347222A Signal/noise ratio optimization tuning system 失效
标题翻译：信噪比优化调谐系统
公开(公告)号：US5347222A
公开(公告)日：1994-09-13
申请号：US2795
申请日：1993-01-11
申请人： Timothy R. Fox , Richard J. Faehnrich
发明人： Timothy R. Fox , Richard J. Faehnrich
IPC分类号： A61B5/055 , G01R33/32 , G01R33/36 , G01R33/56 , H03J3/20 , G01V3/00
CPC分类号： H03J3/20 , G01R33/3628
摘要： A signal/noise ratio optimization tuning system, which can be used for tuning receiver antennas in Magnetic Resonance Imaging receiver systems, has a switch-controlled noise source means that is weakly coupled to the receiver antenna. The switch-controlled noise source switches a noise source between higher and lower power states at a predetermined frequency. A noise power meter means, which is synchronized to the switch-controlled noise source means, measures outputs of the receiver antenna. The noise power meter means measures the outputs of the receiver antenna when the noise source is switched between higher and lower power states and computes a ratio of the receiver antenna output with the noise source in the higher power state to the receiver antenna output with the noise source in the lower power state to obtain a noise power ratio. The tuning adjustment means is varied to maximize this noise power ratio.
摘要翻译：可用于在磁共振成像接收机系统中调谐接收机天线的信号/噪声比优化调谐系统具有弱耦合到接收机天线的开关控制噪声源装置。开关控制噪声源以预定频率切换较高功率状态和较低功率状态之间的噪声源。与开关控制的噪声源装置同步的噪声功率计装置测量接收机天线的输出。当噪声源在较高和较低功率状态之间切换时，噪声功率计意味着测量接收机天线的输出，并计算接收机天线输出与较高功率状态下的噪声源与接收天线输出之间的噪声比源于较低功率状态以获得噪声功率比。改变调谐调整装置以最大化该噪声功率比。

8. 发明授权

US5248943A Multi-view coil bandpass filter array system 失效
标题翻译：多视点线圈带通滤波器阵列系统
公开(公告)号：US5248943A
公开(公告)日：1993-09-28
申请号：US841993
申请日：1992-02-28
申请人： Timothy R. Fox , Jerry C. Posluszny
发明人： Timothy R. Fox , Jerry C. Posluszny
IPC分类号： G01R33/3415 , G01R33/36
CPC分类号： G01R33/3415 , G01R33/3621
摘要： An MRI signal processing apparatus is disclosed which provides a low noise output signal for use in a multi-coil MRI system, wherein each sensing coil provides an input signal to the MRI signal processing apparatus. The apparatus includes input mixer circuitry for frequency shifting each input channel from a first frequency range to a second frequency range, controllable bandpass filter circuity connected to the input mixer circuitry for bandpass filtering each frequency shifted input channel to remove unwanted noise from the MRI signal, output mixer circuity for frequency shifting the output of the controllable bandpass filter circuitry from the second frequency range to the first frequency range, summing circuitry for combining the outputs of the output mixer circuitry of each channel to produce the low noise output signal, mixer control circuitry for controlling the frequency shift of the input mixer circuitry and the output mixer circuitry, and filter control circuitry for controlling the bandwidth and phase shift characteristics of the controllable bandpass filter circuitry.
摘要翻译：公开了一种MRI信号处理装置，其提供用于多线圈MRI系统中的低噪声输出信号，其中每个感测线圈向MRI信号处理装置提供输入信号。该装置包括用于将每个输入通道从第一频率范围频移到第二频率范围的输入混频器电路，连接到输入混频器电路的可控带通滤波器电路，用于对每个频移输入通道进行带通滤波以从MRI信号中去除不想要的噪声，输出混频器电路，用于将可控带通滤波器电路的输出从第二频率范围转换到第一频率范围;用于组合每个通道的输出混频器电路的输出以产生低噪声输出信号的求和电路，混频器控制电路用于控制输入混频器电路和输出混频器电路的频移，以及用于控制可控带通滤波器电路的带宽和相移特性的滤波器控制电路。

9. 发明授权

US4975644A Coil system for a magnetic resonance imaging system 失效
标题翻译：用于磁共振成像系统的线圈系统
公开(公告)号：US4975644A
公开(公告)日：1990-12-04
申请号：US330309
申请日：1989-03-29
申请人： Timothy R. Fox
发明人： Timothy R. Fox
IPC分类号： A61B5/055 , G01R33/34 , G01R33/3415
CPC分类号： G01R33/3664 , G01R33/3415
摘要： A coil system for a magnetic resonance imaging (MRI) system includes a plurality of adjacent surface coils for sensing magnetization in a patient. Switches are provided for enabling selected ones of the plurality of coils to output electrical signals. A signal combiner combines the electrical signals from the selected coils into an output signal for further processing. Coupling cancellation networks are provided between adjacent ones of the plurality of coils for cancelling electrical coupling existing therebetween.

10. 发明申请

US20110044493A1 Apparatus to Facilitate Capturing Samples As Pertain to an Object to Be Imaged and Corresponding Method 有权
标题翻译：用于便于将样本捕获到要成像的对象的装置和相应的方法
公开(公告)号：US20110044493A1
公开(公告)日：2011-02-24
申请号：US12544274
申请日：2009-08-20
申请人： Timothy R. Fox , David T. Nisius
发明人： Timothy R. Fox , David T. Nisius
IPC分类号： G06K9/00 , G01T1/00
CPC分类号： G01N23/04
摘要： One facilitates capturing samples as pertain to an object to be imaged by providing N pulsed sampling chains (where N is an integer greater than 1) where these sampling chains are in planes substantially parallel to one another and are substantially equidistant from adjacent others by a given distance. By one approach, the ratio of this given distance to a desired sample interval is approximately an integer that is relatively prime to N. So configured, a complete set of samples of the object can be captured by the sampling chains in a single pass notwithstanding that the object and the sampling chains are moving quickly with respect to one another.
摘要翻译：通过提供N个脉冲采样链（其中N是大于1的整数），其中这些采样链在彼此基本上平行的平面中并且通过给定的基本上与相邻的其他基本上等距，便于捕获与要成像对象相关的样本距离。通过一种方法，该给定距离与期望采样间隔的比率近似为N的相对原子的整数。因此，配置，对象的完整样本集可以由单次通过中的采样链捕获，尽管如此物体和采样链相对于彼此快速移动。

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