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公开(公告)号：US4534220A
公开(公告)日：1985-08-13
申请号：US574690
申请日：1984-01-27
CPC分类号： G01S15/89 , G01N27/9046 , G01S15/02
摘要： The present invention relates to an apparatus which determines the distribution of the attenuation slope coefficient on a real time basis using the center frequency shift. The phase difference between a received signal and a reference signal is determined using EXCLUSIVE OR gates or an inverse trigonometric relation stored in a ROM. The phase difference is input to a differentiator which outputs the center frequency shift of the received signal on a real time basis. The center frequency shift is input to another differentiator which outputs the attenuation slope coefficient. Thus, the attenuation slope coefficient is determined using simple hardware and without calculating the power spectrum and the first moment.
摘要翻译： 本发明涉及使用中心频率移位实时地确定衰减斜率系数的分布的装置。 接收信号和参考信号之间的相位差使用存储在ROM中的独占或门或逆三角关系来确定。 相位差输入到实时地输出接收信号的中心频移的微分器。 中心频移被输入到输出衰减斜率系数的另一个微分器。 因此，使用简单的硬件来确定衰减斜率系数，并且不计算功率谱和第一时刻。
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公开(公告)号：US4648276A
公开(公告)日：1987-03-10
申请号：US616472
申请日：1984-06-01
CPC分类号： G01S7/52036 , G01S15/8954 , G01S7/52025
摘要： The present invention relates to an apparatus which determines the distribution of the attenuation slope coefficient on a real-time basis using the center frequency shift. In one embodiment, the phase difference between a received signal and a reference signal is determined using EXCLUSIVE OR gates or an inverse trigonometric relation stored in a ROM. The phase difference is input to a differentiator which outputs the center frequency shift of the received signal on a real-time basis. The center frequency shift is input to another differentiator which outputs the attenuation slope coefficient. In other embodiments, the received signal is distributed into received signal bands, having different center frequencies, and signal characteristics of the received signal bands are averaged to remove virtually all effects of spectrum scalloping in the time domain. Thus, the attenuation slope coefficient is obtained without the effects of spectrum scalloping using simple hardware and without Fourier transformation.
摘要翻译： 本发明涉及使用中心频移来实时地确定衰减斜率系数的分布的装置。 在一个实施例中，接收信号和参考信号之间的相位差是使用存储在ROM中的独占或门或逆三角关系来确定的。 相位差被输入到实时地输出接收信号的中心频移的微分器。 中心频移被输入到输出衰减斜率系数的另一个微分器。 在其他实施例中，接收的信号被分配到具有不同中心频率的接收信号频带中，并且接收信号频带的信号特性被平均以消除时域中的频谱扇贝的几乎所有的影响。 因此，衰减斜率系数在没有使用简单的硬件并且没有傅立叶变换的频谱扇贝的影响下获得。
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公开(公告)号：US4757715A
公开(公告)日：1988-07-19
申请号：US16472
申请日：1987-02-17
申请人： Hirohide Miwa , Keiichi Murakami , Takaki Shimura , Yutaka Igarashi , Akira Shiba , Hajime Hayashi
发明人： Hirohide Miwa , Keiichi Murakami , Takaki Shimura , Yutaka Igarashi , Akira Shiba , Hajime Hayashi
CPC分类号： G01S7/52025 , G01N29/343 , G01N29/348 , G01N29/4463 , G01S15/895
摘要： The present invention relates to a signal processing apparatus for quantitatively measuring ultrasonic characteristics of a medium, such as a human body and realizes the high speed quantitative measurement by processing all signals in the time domain. In the processing for eliminating an error, produced by a degree of convergence of the ultrasonic beam, a correcting function that is a function of the depth and frequency is employed. The correcting function is measured in a no-attenuation medium and converted into a form suited to the time domain processing. The function is stored and such frequency characteristics of the function are sequentially read during an actual medium measurement to control the characteristic of a variable characteristic filter to correct the received signal.
摘要翻译： 本发明涉及一种用于定量测量诸如人体之类的介质的超声波特性的信号处理装置，并通过处理时域中的所有信号来实现高速定量测量。 在消除由超声波束的收敛程度产生的误差的处理中，采用作为深度和频率的函数的校正函数。 校正功能在无衰减介质中测量并转换为适合于时域处理的形式。 存储该功能，并且在实际介质测量期间依次读取功能的这种频率特性，以控制可变特征滤波器的特性以校正接收的信号。
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公开(公告)号：US4723553A
公开(公告)日：1988-02-09
申请号：US878858
申请日：1986-06-26
申请人： Hirohide Miwa , Keiichi Murakami , Akira Shiba , Takaki Shimura , Hajime Hayashi
发明人： Hirohide Miwa , Keiichi Murakami , Akira Shiba , Takaki Shimura , Hajime Hayashi
CPC分类号： G01S7/52036 , G01N29/11 , G01N29/38 , G01N29/42 , G01S7/52025 , G01N2291/02475 , G01N2291/101
摘要： An apparatus for measuring acoustic characteristic values of a medium by sending ultrasound pulses into the medium and analyzing the reflected waves from the medium. Medium characteristic values are extracted from the reflected waves, and spectrum scalloping is eliminated. The present invention executes the nonlinear filtering process, for example, the median filtering process to the spectrums, applies a model spectrum to the filtered result and thereby facilitates measurement of supressing fluctuation even when a small number of space average samples one used, by obtaining .beta. from such model spectrum.
摘要翻译： 一种用于通过向介质发送超声波脉冲并分析来自介质的反射波来测量介质的声学特性值的装置。 从反射波中提取中等特征值，消除光谱扇贝。 本发明执行非线性滤波处理，例如对频谱的中值滤波处理，对滤波结果应用模型频谱，从而有助于测量抑制波动，即使当使用少量的空间平均样本时，通过获得β 从这种模型谱。
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公开(公告)号：US4610255A
公开(公告)日：1986-09-09
申请号：US675612
申请日：1984-11-28
CPC分类号： G01H3/125 , G01H5/00 , G01S7/52022 , G01S7/52038 , G01S15/8952
摘要： This invention relates to a system for measuring the non-linear parameter B/A of an ultrasonic medium such as a living tissue, namely the value which indicates a rate of change of the sound velocity with change of pressure, utilizing reflected ultrasonic waves. In this invention, a measuring burst pulse, having a comparatively high frequency, and a pumping pulse, having a comparatively low frequency and a high sound pressure, for giving a change of pressure are transmitted in the same direction while they are superposed, the phase of the reflected waves from each region of the ultrasonic medium is detected as a function of time, and it is then differentiated. Thereby, the distribution of B/A along the transmitting direction of said pulses can be obtained.
摘要翻译： 本发明涉及一种用于测量诸如活组织的超声介质的非线性参数B / A的系统，即利用反射的超声波表示声速随着压力变化的变化率的值。 在本发明中，具有较高频率的测量脉冲脉冲和具有较低频率和高声压的用于提供压力变化的泵浦脉冲在重叠时沿相同方向传输，相位 检测来自超声介质的每个区域的反射波作为时间的函数，然后将其区分开。 因此，可以获得沿着所述脉冲的发送方向的B / A的分布。
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公开(公告)号：US4414850A
公开(公告)日：1983-11-15
申请号：US269861
申请日：1981-06-03
申请人： Hirohide Miwa , Takaki Shimura , Keiichi Murakami
发明人： Hirohide Miwa , Takaki Shimura , Keiichi Murakami
CPC分类号： G01S7/52025 , A61B8/00 , G01S15/8952
摘要： A measurement method and system for measuring characteristics of attenuation of domains in an object comprises transmitting ultrasonic waves into the object and receiving ultrasonic waves reflected from the object. The measured characteristics of attenuation of reflected waves is determined using signal intensities. A plurality of ultrasonic waves having different frequencies are transmitted either simultaneously or alternately to an object, and the reflected waves are received from the object. The signal intensities corresponding to the transmission frequencies among the reflected waves are stored and the signal intensity ratio is calculated. The signal intensity ratio indicates the attenuation characteristic. The attenuation coefficient can also be obtained using a time interval from the transmission time to the time of the reflected wave is received. The attenuation slope can be obtained from this attenuation coefficient and the frequency difference between transmitted ultrasonic waves.
摘要翻译： 用于测量物体中的畴的衰减特性的测量方法和系统包括将超声波发射到物体中并接收从物体反射的超声波。 使用信号强度确定反射波衰减的测量特性。 具有不同频率的多个超声波同时或交替地传送到物体，并且从物体接收反射波。 存储与反射波中的发送频率对应的信号强度，并计算信号强度比。 信号强度比表示衰减特性。 也可以使用从发送时间到接收到反射波的时间的时间间隔来获得衰减系数。 可以从衰减系数和发射超声波之间的频差获得衰减斜率。
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公开(公告)号：US4655228A
公开(公告)日：1987-04-07
申请号：US675869
申请日：1984-11-28
申请人： Takaki Shimura , Keiichi Murakami , Yutaka Igarashi , Akira Shiba , Hajime Hayashi , Hirohide Miwa , Michitoshi Inoue , Masayuki Matsumoto
发明人： Takaki Shimura , Keiichi Murakami , Yutaka Igarashi , Akira Shiba , Hajime Hayashi , Hirohide Miwa , Michitoshi Inoue , Masayuki Matsumoto
CPC分类号： G01S15/8977 , G01S7/52025 , G01S7/52036
摘要： A diagnosis apparatus for discriminating a property of the tissue to be observed from the reflected ultrasonic wave uses the nature of the fine structure of the tissue, and more practically uses the interval of small reflecting bodies dispersely distributed in the tissue as the parameters. The intervals flucatuate. Therefore, an average value and/or a degree of fluctuation is calculated and is displayed. For obtaining the average interval, a method of using the cepstrum of the received signal or a method of using the self-correlation of the received signal can be used.
摘要翻译： 用于从反射的超声波中区分要观察的组织的性质的诊断装置使用组织的精细结构的性质，更实际上使用分散在组织中的小反射体的间隔作为参数。 间隔流血。 因此，计算平均值和/或波动程度并显示。 为了获得平均间隔，可以使用使用接收信号的倒频谱的方法或使用接收信号的自相关的方法。
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公开(公告)号：US4413520A
公开(公告)日：1983-11-08
申请号：US274160
申请日：1981-06-16
申请人： Keiichi Murakami , Shinichi Amemiya , Junji Miyazaki , Tadahiko Yanashima , Atsuo Iida , Takaki Shimura , Hirohide Miwa , Norio Midorikawa
发明人： Keiichi Murakami , Shinichi Amemiya , Junji Miyazaki , Tadahiko Yanashima , Atsuo Iida , Takaki Shimura , Hirohide Miwa , Norio Midorikawa
CPC分类号： G01S15/8952 , A61B8/13 , G01N29/348 , G01S7/52046 , G10K11/343
摘要： An ultrasonic imaging apparatus comprises transducers for transmitting ultrasonic waves and receiving acoustic. The apparatus also transmits ultrasonic waves of different frequencies simultaneously from a plurality of transducers.The frequency characteristics of the transducers are determined in a manner so as to produce the function of frequency filters. An electric filter is additionally provided for compensation. Thus, crosstalk is eliminated even when the frequency difference between the transmitting ultrasonic waves is kept small.
摘要翻译： 超声波成像装置包括用于发送超声波和接收声音的换能器。 该装置还从多个换能器同时发送不同频率的超声波。 换能器的频率特性以产生频率滤波器功能的方式确定。 另外提供电动过滤器用于补偿。 因此，即使发送超声波之间的频率差保持较小，也会消除串扰。
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9.发明授权Electro-sound transducer eliminating acoustic multi-reflection, and ultrasonic diagnostic apparatus applying it 失效消声器多反射的电声换能器及其应用的超声波诊断装置
公开(公告)号：US4552021A
公开(公告)日：1985-11-12
申请号：US567372
申请日：1983-12-30
申请人： Hirohide Miwa , Hajime Hayashi , Takaki Shimura , Atsuo Iida , Fumihiro Namiki , Kenji Kawabe , Narutaka Nakao
发明人： Hirohide Miwa , Hajime Hayashi , Takaki Shimura , Atsuo Iida , Fumihiro Namiki , Kenji Kawabe , Narutaka Nakao
CPC分类号： G10K11/002
摘要： An ultrasonic diagnostic apparatus protected from multi-reflection of sound echoes. Multi-reflection is avoided by eliminating the reflection from the surface of an electro-sound transducer. This invention eliminates the surface reflection of the transducer by following three methods:(a) changing a direction of each surface of an array of transducer elements to direct the reflected sound wave away from the main direction of the sound beam;(b) applying an acoustic matching layer to a surface of a piezo-electric device of the transducer to cancel out phases of sound waves reflected by the surfaces of the layer and the device; and(c) providing an acoustic matching surface on a front or back face of the piezo-electric device to cancel out phases of sound waves reflected by the surface of the device.
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公开(公告)号：US4459853A
公开(公告)日：1984-07-17
申请号：US363852
申请日：1982-03-31
申请人： Hirohide Miwa , Hajime Hayashi , Takaki Shimura
发明人： Hirohide Miwa , Hajime Hayashi , Takaki Shimura
IPC分类号： A61B8/00 , A61B8/14 , G01N29/04 , G01N29/24 , G01S7/52 , G01S7/521 , G01S7/523 , G01S15/89 , G10K11/26 , G10K11/34 , G01N29/00
CPC分类号： G10K11/343 , A61B8/4494 , G01S15/8952 , G01S7/52079 , G10K11/26
摘要： A probe is provided which comprises a plurality of ultrasonic transducer elements, and is so arranged as to be capable of simultaneously transmitting and receiving ultrasonic beams of plural frequencies. Means is provided for changing the shapes of the effective acoustic field of the ultrasonic beams of each a predetermined number of frequencies by selectively operating the ultrasonic transducer elements or interchanging transducers. The shapes of the effective acoustic fields of the ultrasonic beams of the plural frequencies are made substantially coincident in accordance with the range of distance from the probe. Thereby, the measuring of the tissue or the like with coincident shaped beams of plural frequencies can be realized.
摘要翻译： 提供了包括多个超声换能器元件的探针，并且被配置成能够同时发送和接收多个频率的超声波束。 提供了用于通过选择性地操作超声波换能器元件或互换换能器来改变每个预定数量频率的超声波束的有效声场的形状的装置。 根据与探头的距离的范围，多个频率的超声波束的有效声场的形状基本一致。 因此，可以实现具有多个频率的重合成形波束的组织等的测量。
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