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1.发明授权Method and apparatus for high speed digital phased array coherent imaging system 失效高速数字相控阵相干成像系统的方法与装置
公开(公告)号：US4839652A
公开(公告)日：1989-06-13
申请号：US56177
申请日：1987-06-01
申请人： Matthew O'Donnell , William E. Engeler , Thomas L. Vogelsong , Steven G. Karr , Sharbel E. Noujaim
发明人： Matthew O'Donnell , William E. Engeler , Thomas L. Vogelsong , Steven G. Karr , Sharbel E. Noujaim
CPC分类号： H03H17/0664 , G01S15/8918 , G01S7/52034 , G01S7/52046 , G10K11/346 , H03H2218/04
摘要： A method for generating an output stream of digital data words, with each data word representing the amplitude of an analog signal at one of a multiplicity F samples each second and with substantially equally spaced time intervals T therebetween, is obtained from a digital baseband demodulation system used for array beam forming. A data stream, formed of interleaved ADC output digital data words acquired from a set of converters, is at a rate of F total samples/second. Subsequent digital demodulation, filtration, and decimation provides digital output signals which need less delay resolution prior to the formation of coherent sum signals, thereby reducing overall channel memory requirements. The output baseband data stream has enhanced dynamic range, thereby reducing the ADC bit density requirements.
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2.发明授权
公开(公告)号：US5203335A
公开(公告)日：1993-04-20
申请号：US844031
申请日：1992-03-02
CPC分类号： G10K11/346 , G01N29/0645 , G01S15/8909 , G01S7/52028
摘要： A beam former in a PASS ultrasonic imaging system includes a set of sigma-delta modulators which operate to separately digitize the received echo signal from each transducer element. The oversampled one-bit digital representations of each echo signal are delayed as required for beam steering and focusing, and are summed together. A decimator filter reduces the sample rate of the digitized receive beam prior to display of the image resulting from the receive beam.
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公开(公告)号：US4680551A
公开(公告)日：1987-07-14
申请号：US785140
申请日：1985-10-07
CPC分类号： G01R33/3875 , G01R33/24
摘要： A method for minimizing the inhomogeneity of a static magnetic field, produced by a main magnet, over a selected arbitrary volume, by operation of a plurality N of shimming coils each independently producing an associated shimming magnetic field having an associated inhomogeneity which is a function of spatial location over that same volume, uses the steps of: measuring the magnitude of the main magnet field, in the absence of all shimming fields, at a plurality of locations X.sub.i upon the surface of an imaginary sphere enclosing the arbitrary volume; measuring the polarity and magnitude of each of the N shimming fields, with respect to the polarity and magnitude of a D.C. current flowing through the associated shimming coil, at the same plurality of locations X.sub.i upon the imaginary sphere surface; determining the weighted mean-square variation of the total field at each of another plurality of points Y.sub.i within the volume of said imaginary sphere; and (d) selecting the current magnitudes and polarities for each of the N shimming coils to provide each of the N associated shimming fields with magnitude and polarity to minimize the inhomogeneity of the main magnetic field in the arbitrary volume. The set of weighting coefficients may be selected to all be equal, or to emphasize at least one desired region of the arbitrary volume.
摘要翻译： 一种用于通过操作多个N个匀场线圈来最小化由主磁体产生的静磁场在选定的任意体积上的不均匀性的方法，每个独立地产生相关联的匀场磁场，其具有相关的不均匀性，该相关的不均匀性是 在相同体积上的空间位置使用以下步骤：在包围任意体积的虚拟球体的表面上的多个位置Xi处，在没有所有匀场的情况下测量主磁场的大小; 相对于流过相关联的调色线圈的直流电流的极性和幅度，在虚拟球体表面上相同的多个位置Xi处，测量每个N个匀场的每个的极性和幅度; 确定所述虚拟球体积内的另一多个点Yi中的每个点处的总场的加权均方差; 并且（d）为N个匀场线圈中的每一个选择当前幅度和极性，以提供N个相关联的匀场中的每一个具有大小和极性以最小化任意体积中的主磁场的不均匀性。 加权系数集合可以被选择为全部相等，或者强调任意卷的至少一个期望区域。
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公开(公告)号：US5566133A
公开(公告)日：1996-10-15
申请号：US564551
申请日：1995-11-29
摘要： An optical communication system for ultrasound imaging systems employs a light source and photodetector array in the imaging console. The light source and photodetector array are coupled to each other through an optical fiber passing through the probe. Information from the probe is communicated to the console by an optical modulator, situated in the optical path from source to detector. The ultrasound signals are converted into electrical signals by probe electronics, and these electrical signals serve to alter either the phase or amplitude of optical signals passing through the modulator. Since the light source and photodetectors reside in the imaging console, very little power is dissipated in the probe.
摘要翻译： 用于超声成像系统的光通信系统在成像控制台中采用光源和光电检测器阵列。 光源和光电检测器阵列通过穿过探针的光纤彼此耦合。 来自探头的信息通过位于从源到检测器的光路中的光学调制器传送到控制台。 超声信号通过探针电子元件转换为电信号，这些电信号用于改变通过调制器的光信号的相位或幅度。 由于光源和光电检测器位于成像控制台中，因此在探头中消耗的功率很小。
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公开(公告)号：US5349525A
公开(公告)日：1994-09-20
申请号：US2000
申请日：1993-01-08
申请人： Robert J. Dunki-Jacobs , Anne L. Hall , Richard B. Bernardi , Matthew O'Donnell , Lewis J. Thomas , Kenneth B. Welles, II , William E. Engeler
发明人： Robert J. Dunki-Jacobs , Anne L. Hall , Richard B. Bernardi , Matthew O'Donnell , Lewis J. Thomas , Kenneth B. Welles, II , William E. Engeler
CPC分类号： G01S7/52071 , G01S15/8981
摘要： An ultrasonic imaging system for displaying color flow images includes a receiver which demodulates ultrasonic echo signals received by a transducer array and dynamically focuses the baseband echo signals. A color flow processor includes a frequency domain adaptive wall filter which automatically adjusts to changes in Doppler-shifted frequency and bandwidth of the wall signal components in the focused baseband echo signals after the echo signals have undergone Fourier transformation into the frequency domain. The mean Doppler-shifted frequency of the resulting filtered baseband echo signals is used to indicate velocity of moving scatterers and to control color in the displayed image.
摘要翻译： 用于显示彩色流图像的超声波成像系统包括：解调由换能器阵列接收的超声回波信号的接收器，并且动态地聚焦基带回波信号。 色流处理器包括频域自适应壁滤波器，其在回波信号经过傅里叶变换到频域之后，自动调整聚焦的基带回波信号中的壁信号分量的多普勒频移和带宽的变化。 所得滤波的基带回波信号的平均多普勒频移用于表示运动散射体的速度和控制显示图像中的颜色。
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公开(公告)号：US5111695A
公开(公告)日：1992-05-12
申请号：US551093
申请日：1990-07-11
CPC分类号： G10K11/346 , G01S7/52046
摘要： A method for dynamic focus of received energy, in a vibratory energy imaging system, into a beam in which contribution from transducers in an array of N such transducers, are progressively enabled to contribute to beam focussing dependent upon distance between a particular j-th transducer (where 1.ltoreq.j.ltoreq.N) is responsive to the depth, or range R, of the focal point at any instant of time; the initial steering angle .theta., with respect to the array normal, is used in conjunction with a range clock, to determine the time when each off-normal transducer channel is enabled to add to the beam (dynamic apodization) and to finely adjust the channel time delay to properly focus the beam after the enablement of the channel.
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7.发明授权Apparatus for implementation of desired input/output function in an electronic system having a plurality of channels 失效用于在具有多个通道的电子系统中实现期望的输入/输出功能的装置
公开(公告)号：US5047771A
公开(公告)日：1991-09-10
申请号：US518600
申请日：1990-05-03
CPC分类号： G06F1/03 , H03M1/1042 , H03M1/1235
摘要： Apparatus for providing a desired output signal as a function of a single-valued input signal in an electronic system, includes: an addressable memory, having a plurality L locations, each for storage of a data word of B bits; a circuit for storing in each of the L locations of the memory means a B-bit data word having a value selected to provide a particular output value; and circuitry for converting a present single-valued increment of input signal to a unique address, within the range of allowable locations of the memory, to cause each increment of input signal to select the associated one of the L data word locations, from which to output corresponding data.
摘要翻译： 用于在电子系统中提供作为单值输入信号的函数的期望输出信号的装置包括：具有多个L个位置的可寻址存储器，每个位置用于存储B位数据字; 用于在存储器装置的每个L位置存储具有被选择以提供特定输出值的值的B位数据字的电路; 以及用于在存储器的可允许位置的范围内将输入信号的当前单值增量转换为唯一地址的电路，以使输入信号的每个增量选择所述L个数据字位置中的相关联的一个， 输出相应的数据。
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8.发明授权Apparatus for testing data conversion/transfer functions in a vibratory energy imaging system 失效用于在振动能量成像系统中测试数据转换/传递功能的装置
公开(公告)号：US5047770A
公开(公告)日：1991-09-10
申请号：US518595
申请日：1990-05-03
摘要： Apparatus for testing data conversion/transfer functions in each of a plurality N of channels of a vibratory energy imaging system includes a multiplexer for providing, to an addressable memory having a plurality of L=2.sup.M locations in each of which a data word of B bits can be stored, a selected one of an input data word and a test data word, each of which can address one of the L locations of the memory means. The address multiplexer facilitates retrieval from memory of a B-bit data word having a value selected to implement a selected function for that channel, so that comparision of data from the selected test address with the data which has been sent to that location for storage, will indicate if proper data is stored for carrying out the designated function.
摘要翻译： 用于测试振动能量成像系统的多个N个通道中的每一个中的数据转换/传递功能的装置包括多路复用器，用于向具有多个L = 2M位置的可寻址存储器提供B位的数据字 可以存储输入数据字和测试数据字中的所选择的一个，每个可以寻址存储器装置的L个位置之一。 地址复用器便于从具有被选择为实现该信道的所选功能的值的B位数据字的存储器中检索，以便将来自所选测试地址的数据与已发送到该位置的数据进行比较以进行存储， 将指示是否存储正确的数据以执行指定的功能。
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公开(公告)号：US5005419A
公开(公告)日：1991-04-09
申请号：US207532
申请日：1988-06-16
申请人： Matthew O'Donnell , Kenneth B. Welles, II , Carl R. Crawford , Norbert J. Pelc , Steven G. Karr
发明人： Matthew O'Donnell , Kenneth B. Welles, II , Carl R. Crawford , Norbert J. Pelc , Steven G. Karr
CPC分类号： G01S7/52023 , G01S15/8915
摘要： A method and apparatus for improved digital processing of the analog echo signals in a coherent imaging system is described which simplifies the channel circuitry requirements. The analog echo signals detected with a phased array of transducer elements are first compressed in a non-linear manner then expanded non-linearly with analog-to-digital converter means to provide increased instantaneous dynamic range in the overall system. Representative phased array coherent imaging systems having the improved digital processing means are also disclosed.
摘要翻译： 描述了一种用于改进相干成像系统中的模拟回波信号的数字处理的方法和装置，其简化了信道电路要求。 用相控阵的换能器元件检测的模拟回波信号首先以非线性方式压缩，然后以模数转换器装置非线性地扩展，以在整个系统中提供增加的瞬时动态范围。 还公开了具有改进的数字处理装置的代表性相控阵相干成像系统。
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10.发明授权Methods of correcting data conversion/transfer errors in a vibratory energy imaging system utilizing a plurality of channels 失效在利用多个通道的振动能量成像系统中校正数据转换/传送错误的方法
公开(公告)号：US5047769A
公开(公告)日：1991-09-10
申请号：US518596
申请日：1990-05-03
CPC分类号： H03M1/1042 , H03M1/1235
摘要： A method for correcting data conversion/transfer errors in each of a plurality N of channels of a vibratory energy imaging system, by: providing an addressable memory having a plurality L=2.sup.M locations, each for storage of a data word of B bits; then storing in each of the L locations of the memory means a B-bit data word having a value selected to cause the output-to-input transfer function for that channel to assume a desired relationship, with respect to a standard transfer measure; and selecting that one of the L data word locations, responsive to that actual one of an M-bit data word output from a channel ADC or from a data bus, responsive to a test signal, in which to place corresponding data.
摘要翻译： 一种用于通过以下方式来校正振动能量成像系统的多个N个通道中的每一个中的数据转换/传送错误的方法：提供具有多个L = 2M个位置的可寻址存储器，每个用于存储B位数据字; 然后在存储器装置的每个L位置存储一个B位数据字，该B位数据字被选择为使得该通道的输出到输入传递函数相对于标准传送测量呈现期望的关系; 以及响应于来自信道ADC或从数据总线输出的M位数据字中的实际的一个，响应于在其中放置相应数据的测试信号，选择L个数据字位置中的一个。
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