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1.发明授权
公开(公告)号：US4682106A
公开(公告)日：1987-07-21
申请号：US714405
申请日：1985-03-21
CPC分类号： G01R33/485 , G01R33/46
摘要： A method for proton decoupling, nuclear Overhauser enhancement and/or in selective saturation magnetic resonance spectroscopy, particularly relevant to in vivo spectroscopic imaging, utilizes a radio-frequency pulse modulated with a truncated (sinc X)/X function capable of being windowed. The radio-frequency pulse is tuned to the frequency of the nuclear species, such as .sup.1 H, to be decoupled or saturated and has a bandwidth adjusted to correspond to the entire chemical shift spectrum of the nuclear species to be decoupled, minimizing the amount of radio-frequency power transmitted into a volume of the irradiated sample. Several methods, and several embodiments of apparatus, for forming the required radio-frequency pulse, are disclosed.
摘要翻译： 特别是与体内光谱成像相关的用于质子解耦，核Overhauser增强和/或选择性饱和磁共振光谱的方法利用能够被窗口化的截短（sinc X）/ X函数调制的射频脉冲。 射频脉冲被调谐到诸如1H的核物质的频率被解耦或饱和，并且具有调整的带宽以对应于待解耦的核物质的整个化学位移谱，最小化无线电量 射频功率传输到被照射样品的体积中。 公开了用于形成所需射频脉冲的几种方法和装置的若干实施例。
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2.发明授权Apparatus for shifting the phase of transmitter and receiver analog baseband signals in an NMR system 失效用于在NMR系统中移位发射机和接收机模拟基带信号的相位的装置
公开(公告)号：US4736328A
公开(公告)日：1988-04-05
申请号：US779338
申请日：1985-09-23
CPC分类号： G01R33/3607
摘要： Apparatus for shifting the phase of a phase-quadrature signal pair, in at least one of the transmitter and receiver of an NMR system, uses a circuit for shifting the phase of each of the pair of signals by a substantially similar amount responsive to a control signal, and a microcontroller for programmably establishing the control signal data to provide a desired phase shift. Typically, the control signal is of digital data nature and the phase shifter operates to shift signal phase through an angle equal to a selected multiple N of a basic angle. The basic angle is selected such that a plurality of equal angle increments are established by the resolving properties of the data signal. A plurality of phase shifters can be controlled by a single microcontroller.
摘要翻译： 用于在NMR系统的发射机和接收机中的至少一个中移相相位正交信号对的相位的装置使用一个电路，用于使一对信号中的每一个的相位相应于对应于控制的基本类似的量 信号和微控制器，用于可编程地建立控制信号数据以提供期望的相移。 通常，控制信号具有数字数据性质，并且移相器操作以使信号相位移动等于基本角度的选定多个N的角度。 选择基本角度，使得通过数据信号的分辨率特性建立多个相等的角度增量。 多个移相器可以由单个微控制器控制。
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公开(公告)号：US4242614A
公开(公告)日：1980-12-30
申请号：US15077
申请日：1979-02-26
申请人： Dimitrios Vatis , Charlie B. Turner
发明人： Dimitrios Vatis , Charlie B. Turner
CPC分类号： H05B41/36 , H05B37/029
摘要： System for controlling operation of a plurality of gaseous discharge lamps for selectively turning on or off one or more of the lamps and producing desired lumen output of the lamps as needed, to provide for conservation of electrical energy. In the system, each of the discharge lamps is connected to a separate variable impedance ballast device, a control circuit for varying the impedance of each ballast device, and a signal processing circuit connected to each control circuit for operating the same, and a signal transmitting device for transmitting information to each of the signal processing circuits, whereby the latter circuits selectively operate the respective control circuits in response to the information received from the signal transmitting device. In a preferred embodiment, the signal transmitting device is a remote transmitter such as a radio frequency signal device for remote control of the lighting system.
摘要翻译： 用于控制多个气体放电灯的操作的系统，用于选择性地打开或关闭一个或多个灯，并根据需要产生灯的期望的流明输出，以提供电能的保存。 在该系统中，每个放电灯连接到单独的可变阻抗镇流器装置，用于改变每个镇流器装置的阻抗的控制电路以及连接到每个控制电路用于操作该镇流器的信号处理电路，以及信号发送 用于向每个信号处理电路发送信息的装置，由此后一电路响应于从信号发送装置接收的信息选择性地操作各个控制电路。 在优选实施例中，信号发送装置是用于远程控制照明系统的诸如射频信号装置的远程发射机。
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4.发明授权Radio-frequency spectrometer subsystem for a magnetic resonance imaging system 失效用于磁共振成像系统的射频光谱仪子系统
公开(公告)号：US4694254A
公开(公告)日：1987-09-15
申请号：US743121
申请日：1985-06-10
申请人： Dimitrios Vatis , Lowell S. Smith
发明人： Dimitrios Vatis , Lowell S. Smith
IPC分类号： G01R33/36 , G01R33/561 , G01R33/20
CPC分类号： G01R33/3607 , G01R33/5616
摘要： A radio-frequency (RF) spectrometer subsystem, for a nuclear magnetic resonance spectroscopy and imaging system, provides high-power RF pulse signals each having an envelope of minimum distortion; a portion of the actual RF magnetic field, in the sample-examination volume, is returned to the spectrometer for subsequent correction of the RF signal characteristics responsive to a comparison of the RF magnetic field sample waveform to the requested pulse envelope waveform.
摘要翻译： 用于核磁共振光谱和成像系统的射频（RF）光谱仪子系统提供每个具有最小失真包络的高功率RF脉冲信号; 响应于RF磁场采样波形与所请求的脉冲包络波形的比较，将采样体积中的实际RF磁场的一部分返回到光谱仪以便随后校正RF信号特性。
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5.发明授权Apparatus for providing multiple-species capability of single-species NMR spectrometry/imaging apparatus 失效用于提供单种NMR光谱法/成像装置的多种能力的装置
公开(公告)号：US4677382A
公开(公告)日：1987-06-30
申请号：US767211
申请日：1985-08-19
申请人： Dimitrios Vatis
发明人： Dimitrios Vatis
CPC分类号： G01R33/3607
摘要： Conversion apparatus facilitating acquisition of NMR spectroscopy and/or imaging information from a desired one of a plurality of nuclear species, in a system originally capable of acquiring spectroscopy/imaging information for only a single nuclear species, uses: a first frequency converter to provide an excitation signal by heterodyning the transmitter signal of the single species system to the Larmor frequency of the desired one of the plurality of nuclear species, if that desired species is not the original single species; and a second frequency converter to heterodyne the response signal from the Larmor frequency of the desired nuclear species, if that desired species is not the original single species, to the frequency of the single species. The first and second converters are bypassed if the single original species is the desired species.
摘要翻译： 在原始能够仅获得单个核物种的光谱学/成像信息的系统中，便于从多个核物种中期望的一个核物种获得NMR光谱和/或成像信息的转换装置使用：第一变频器， 激励信号通过将单个物种系统的发射机信号外差到多个核物种中所需的一个核物种的拉莫尔频率，如果所需物种不是原始的单一物种; 以及第二变频器，以将来自所需核物种的拉莫尔频率的响应信号外差，如果所需物种不是原始单一物种，则单个物种的频率。 如果单个原始物种是所需物种，则第一和第二转换器被旁路。
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6.发明授权
公开(公告)号：US4602226A
公开(公告)日：1986-07-22
申请号：US714406
申请日：1985-03-21
申请人： Dimitrios Vatis
发明人： Dimitrios Vatis
CPC分类号： H03C1/00
摘要： Apparatus for the gated modulation of an RF carrier signal uses a balanced circuit for amplitude-modulating the carrier signal, and a circuit having a predetermined minimum on-off amplitude-ratio for providing respective very high attenuation and very low attenuation to the modulated carrier signal responsive to respective off and on levels of a binary logic gate signal. Each of the RF carrier, modulation and gate signals may be individually buffered and/or amplified prior to use of that signal in one of the modulation or gate processes. The modulated RF carrier signal and/or the gated RF signal may also be buffered and/or amplified prior to being respectively gated in, or output from, the apparatus. Each of the buffer-amplifiers, except the gate signal buffer-amplifier, may itself be gated responsive to the gate signal, to provide a desired degree of apparatus output signal on-off ratio.
摘要翻译： 用于RF载波信号的门控调制的装置使用用于对载波信号进行幅度调制的平衡电路，以及具有预定的最小导通截止幅度比的电路，用于向调制的载波信号提供非常高的衰减和非常低的衰减 响应于二进制逻辑门信号的相应的截止和接通电平。 RF载波，调制和门信号中的每一个可以在调制或门过程之一中使用该信号之前被单独地缓冲和/或放大。 经调制的RF载波信号和/或门控RF信号也可以在被分别门控或从设备输出之前进行缓冲和/或放大。 除栅极信号缓冲放大器之外的每个缓冲放大器本身可以响应于门信号而门控，以提供期望程度的装置输出信号开 - 关比。
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