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1. 发明授权

US5065764A Ultrasonic doppler blood flow velocity detection apparatus 失效
标题翻译：超声波多普勒血液流速检测装置
公开(公告)号：US5065764A
公开(公告)日：1991-11-19
申请号：US452653
申请日：1989-12-19
申请人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
IPC分类号： A61B8/06 , G01S15/58
CPC分类号： G01S15/584 , A61B8/06 , G01S15/582
摘要： An ultrasonic Doppler blood flow velocity detection apparatus comprises: a signal producing circuit for producing trigger pulses, a sampling clock signal having a given phase relation with the trigger pulses, and a pair of quadrature signals of a given frequency in response to the trigger pulses. A transducer transmits also receives ultrasonic waves in response to the trigger pulses; The transducer also receives ultrasonic waves reflected back by an ultrasonic-wave reflective object and converts the received ultrasonic waves into an electric echo signal. A Doppler shift detection circuit, responsive to the pair of quadrature signals and the echo signal, detects the Doppler shift. An averaging circuit, responsive to the sampling clock, and the Doppler shift; averages plural time-different values of the Doppler shift, thereby producing a signal indicative of flow velocity of the ultrasonic-wave reflective object. The detection apparatus may further comprise a weighting circuit responsive to the output of the Doppler detection circuit and the sampling clock signal for weighting every value of the plural time-different values.
摘要翻译：超声波多普勒血流速度检测装置包括：产生触发脉冲的信号产生电路，与触发脉冲具有给定相位关系的采样时钟信号，以及响应于触发脉冲的给定频率的一对正交信号。换能器发射还响应于触发脉冲接收超声波; 换能器还接收由超声波反射物体反射的超声波，并将接收到的超声波转换成电回波信号。响应于该对正交信号和回波信号的多普勒频移检测电路检测多普勒频移。平均电路，响应采样时钟和多普勒频移; 平均多普勒频移的多个时间不同的值，从而产生表示超声波反射物体的流速的信号。检测装置还可以包括响应于多普勒检测电路的输出的加权电路和用于对多个时间不同值的每个值进行加权的采样时钟信号。

2. 发明授权

US5035245A Ultrasonic Doppler blood flow velocity detection apparatus 失效
标题翻译：超声多普勒血流速度检测仪
公开(公告)号：US5035245A
公开(公告)日：1991-07-30
申请号：US355944
申请日：1989-05-22
申请人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
IPC分类号： A61B8/06 , G01S15/58 , G01S15/89
CPC分类号： G01S15/582 , A61B8/06 , G01S15/584 , G01S15/8979
摘要： An ultrasonic Doppler blood flow detection apparatus of the invention comprises: a transducing circuit for emitting ultrasonic waves at a predetermined interval and for receiving reflected ultrasonic waves from an object in the blood vessel and converting the received signal into an electric echo signal; a frequency-difference signal producing circuit for producing frequency-difference components between the echo signal and first pair of quadrature signals of a frequency f1 in response to the echo signal and the first pair of quadrature signals; first and second Doppler signal detection circuit for detecting first and second Doppler signals of upper and lower sidebands of the frequency f1 from the frequency-difference components in response to second pair of quadrature signals of a frequency f2; and a frequency difference calculation circuit for calculating frequency difference between output signals from the first and second Doppler signal detection circuits. The frequency difference indicates compressed Doppler shift frequency which can detect a higher velocity of blood flow.
摘要翻译：本发明的超声波多普勒血流检测装置包括：转换电路，用于以预定的间隔发射超声波，并用于从血管中的物体接收反射的超声波，并将接收的信号转换成电回波信号; 频率差信号产生电路，用于响应于回波信号和第一对正交信号，在回波信号和频率f1的第一对正交信号之间产生频差分量; 第一和第二多普勒信号检测电路，用于响应于频率为f2的第二对正交信号，从频率分量检测频率f1的上边带和下边带的第一和第二多普勒信号; 以及频率差计算电路，用于计算来自第一和第二多普勒信号检测电路的输出信号之间的频率差。频差表示压缩多普勒频移，可以检测出较高的血流速度。

3. 发明授权

US5031628A Ultrasonic blood velocity detector 失效
标题翻译：超声波血速检测仪
公开(公告)号：US5031628A
公开(公告)日：1991-07-16
申请号：US364727
申请日：1989-06-12
申请人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
IPC分类号： A61B8/06 , G01S15/52 , G01S15/58
CPC分类号： G01S15/52 , A61B8/06 , G01S15/586
摘要： An ultrasonic blood velocity detector comprises an ultrasonic probe emitting ultrasonic wave into an examined body and converting echoes of the emitted ultrasonic wave into an echo signal. The echo signal is processed into a detection signal through phase detection. A first Doppler signal and a second Doppler signal are derived from the detection signal. The first Doppler signal represents a flow of blood. The second Doppler signal mainly contains clutter components. A difference in phase between the first and second Doppler signals is calculated.
摘要翻译：超声波血速检测器包括将超声波发射到被检体并将发射的超声波的回波转换为回波信号的超声波探头。通过相位检测将回波信号处理成检测信号。从检测信号导出第一多普勒信号和第二多普勒信号。第一多普勒信号表示血液流。第二多普勒信号主要包含杂波分量。计算第一和第二多普勒信号之间的相位差。

4. 发明授权

US4979513A Ultrasonic diagnostic apparatus 失效
标题翻译：超声波诊断仪
公开(公告)号：US4979513A
公开(公告)日：1990-12-25
申请号：US254834
申请日：1988-10-07
申请人： Ikuo Sakai , Nobuaki Furuya , Yasuhiro Nakamura , Masami Kawabuchi
发明人： Ikuo Sakai , Nobuaki Furuya , Yasuhiro Nakamura , Masami Kawabuchi
IPC分类号： A61B8/06 , G01S15/58
CPC分类号： G01S15/8984 , A61B8/06 , G01S15/582
摘要： Pulses of an ultrasonic wave beam are emitted into a body at a predetermined repetition period. Echo pulses of the ultrasonic wave beam are received via a plurality of different channels. Each of the received pulses is converted simultaneously into corresponding electric signals of the respective channels. A time-dependent change in a variation between the electric signals of the respective channels is derived. A component of a speed of moving matter within the body in a predetermined direction is calculated on the basis of the derived time-dependent change. The moving matter causes the echo pulses. The predetermined direction is perpendicular to a direction of travel of the ultrasonic wave beam pulses.
摘要翻译：超声波束的脉冲以预定的重复周期被发射到体内。经由多个不同的通道接收超声波束的回波脉冲。每个接收的脉冲被同时转换成相应通道的相应的电信号。导出各个通道的电信号之间的变化的时间依赖性变化。基于导出的时间依赖性变化来计算体内在预定方向上的运动物质的速度的分量。移动物质会导致回波脉冲。预定方向垂直于超声波束脉冲的行进方向。

5. 发明授权

US4966153A Ultrasonic doppler blood flow velocity detection apparatus and a method for detecting blood flow velocity 失效
标题翻译：超声多普勒血流速度检测装置及血流速度检测方法
公开(公告)号：US4966153A
公开(公告)日：1990-10-30
申请号：US341506
申请日：1989-04-21
申请人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
IPC分类号： A61B8/06 , G01S15/58
CPC分类号： A61B8/06 , G01S15/582 , G01S15/584
摘要： An ultrasonic Doppler blood flow velocity detection apparatus comprises: a pulse generation circuit for generating pulses at a predetermined interval; a transducer for transmitting ultrasonic waves in response to each of the pulses and for receiving reflected ultrasonic waves from a reflective object in the blood of a human body and converting the received ultrasonic waves into an electric echo signal; an extraction circuit for extracting signal components of first and second frequencies f1 and f2; a signal producing circuit for producing a signal having a frequency of .vertline.f1-f2.vertline. using output signals of the extraction circuit; a detection circuit for detecting amplitude of an output signal of the frequency difference signal producing circuit circuit and for phase-comparing the output signal with a reference signal; and a reference signal generation circuit for generating the reference signal of a predetermined frequency fr in response to each of the pulses, the predetermined frequency fr being approximately equal to the frequency difference .vertline.f1-f2.vertline.. The invention also discloses a method for detecting blood flow velocity.
摘要翻译：一种超声波多普勒血流速度检测装置，包括：脉冲发生电路，用于以预定间隔产生脉冲; 用于响应于每个脉冲发射超声波并用于从人体血液中的反射物体接收反射的超声波并将接收到的超声波转换成电回声信号的换能器; 提取电路，用于提取第一和第二频率f1和f2的信号分量; 信号产生电路，用于使用所述提取电路的输出信号产生频率为| f1-f2 |的信号; 检测电路，用于检测所述频差信号产生电路电路的输出信号的幅度，并将所述输出信号与参考信号进行相位比较; 以及参考信号产生电路，用于响应于每个脉冲产生预定频率fr的参考信号，预定频率fr近似等于频差| f1-f2|。本发明还公开了一种检测血流速度的方法。

6. 发明授权

US4779622A Ultrasonic wave diagnostic apparatus employing interpolated values of weighting data 失效
标题翻译：超声波诊断装置采用加权数据的内插值
公开(公告)号：US4779622A
公开(公告)日：1988-10-25
申请号：US70255
申请日：1987-07-06
申请人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Ikuo Sakai , Masami Kawabuchi
IPC分类号： A61B8/14 , G01S7/52 , G10K11/34 , A61B10/00
CPC分类号： G10K11/348 , G01S7/52047
摘要： An ultrasonic wave diagnostic apparatus having an array of electro-acoustic transducer elements and respective channels for supplying drive signals to the electro-acoustic transducer elements and amplifying received echo signals from these elements, with the respective overall gains of the channels being controlled by corresponding values of weighting data. A set of mutually independent D/A converters, smaller in number than the number of electro-acoustic transducer elements, produce weighting data for respective ones of the channels that are spaced apart by a fixed number of channels. Respective interpolated values of weighting data for the remaining channels are derived by analog operations executed upon each of successive pairs of D/A converter outputs.

7. 发明授权

US5127418A Ultrasonic diagnostic apparatus 失效
标题翻译：超声波诊断仪
公开(公告)号：US5127418A
公开(公告)日：1992-07-07
申请号：US543890
申请日：1990-06-27
申请人： Ikuo Sakai , Yasuhiro Nakamura , Masami Kawabuchi
发明人： Ikuo Sakai , Yasuhiro Nakamura , Masami Kawabuchi
IPC分类号： G01S15/58
CPC分类号： G01S15/8984 , G01S15/582
摘要： Pulses of an ultrasonic wave beam are emitted into a body at a predetermined repetition period. Echo pulses of the ultrasonic wave beam are received via a pulrality of different channels. Each of the received pulses is converted into corresponding electric signals of the respective channels. A pair of adders invert signs of alternate ones of pairs of the electric signals of adjacent channels, summing the inverted sign electric signals with remaining non-inverted sign electric signals, converting the electric signals into a pair of complex signals having phases which are spatially different from each other by 90 degrees. An autocorrelation function of the complex signals is calculated. A component of a speed of moving matter within the body in a predetermined direction is calculated on the basis of the autocorrelation function. The moving matter causes the echo pulses. The predetermined direction is perpendicular to a direction of travel of the ultrasonic wave beam pulses.
摘要翻译：超声波束的脉冲以预定的重复周期被发射到体内。通过不同通道的脉冲串接收超声波束的回波脉冲。每个接收的脉冲被转换成相应通道的相应的电信号。一对加法器反转相邻通道的电信号对的交替信号的符号，将反相符号电信号与剩余的非反相符号电信号相加，将电信号转换成具有在空间上不同的相位的一对复信号彼此相差90度。计算复信号的自相关函数。基于自相关函数计算体内在预定方向上运动物质的速度的分量。移动物质会导致回波脉冲。预定方向垂直于超声波束脉冲的行进方向。

8. 发明授权

US4848355A Ultrasonic doppler blood flowmeter 失效
标题翻译：超声多普勒血流量计
公开(公告)号：US4848355A
公开(公告)日：1989-07-18
申请号：US865012
申请日：1986-05-20
申请人： Yasuhiro Nakamura , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Masami Kawabuchi
IPC分类号： A61B8/06
CPC分类号： A61B8/06
摘要： An ultrasonic Doppler blood flowmeter measures the velocity of blood flow at an arbitrary position of the body of a subject by making use of Doppler shift of an ultrasonic echo signal. The echo signal including Doppler shift from the blood flow of the body is detected in phase on the basis of standard reference signal, and the distance to an intended position is extracted from the phase detected signal and is integrated, and the direct-current component or ultralow frequency component of the Doppler shift signal obtained from the integrator is fed back negatively to the integrator. As a result, the echo signal components of the body tissues are removed, and the frequency of blood flow only can be analyzed, so that an accurate blood flow information may be obtained.
摘要翻译：超声波多普勒血流计利用超声波回波信号的多普勒频移来测量被检体的任意位置处的血流速度。基于标准参考信号，同步地检测包括来自身体血流的多普勒频移的回波信号，并从相位检测信号提取到预期位置的距离并被积分，并且将直流分量或从积分器获得的多普勒频移信号的超低频分量反馈回积分器。结果，去除了身体组织的回波信号分量，并且仅能够分析血流量，从而可以获得精确的血流信息。

9. 发明授权

US4751929A Ultrasonic bloodstream diagnostic apparatus with dual displays of velocity profiles and average flow velocity 失效
标题翻译：超声波血流诊断仪，具有双重显示速度曲线和平均流速
公开(公告)号：US4751929A
公开(公告)日：1988-06-21
申请号：US823094
申请日：1986-01-21
申请人： Yoshihiro Hayakawa , Yasuhiro Nakamura , Masami Kawabuchi
发明人： Yoshihiro Hayakawa , Yasuhiro Nakamura , Masami Kawabuchi
IPC分类号： A61B8/06 , A61B8/00 , G01S7/52 , G01S15/89 , G06F11/00 , G06F15/42
CPC分类号： G01S7/52074 , G01S15/8979
摘要： A ultrasonic bloodstream diagnostic apparatus wherein the frequencies of Doppler shift ultrasound information are analyzed by a frequency analyzer to derive a power spectrum represented by N-bit data. The N-bit data comprises (K+M+L) bits, where K represents the number of binary 0's in the highest order bit positions and varies in the range between zero and N-M, M represents a fixed number of significant bits immediately following the binary 0's and L represents the number of insignificant bits in the lowest order bit positions immediately following the M significant bits, where K+L equals N-M. A data compression technique is employed to conver the N-bit data to (m+l)-bit data by a data conversion circuit, with the m bits respectively identical to the M bits and l bits being a binary representation of the number of the L bits. A microprocessor derives a signal representing the average frequency of the power spectrum from the (m+l)-bit output data signal. The (m+l)-bit output data signal is converted by a conversion memory to a form suitable for display by an algorithm which reconverts it to N-bits and logarithmically compresses the latter.
摘要翻译：一种超声波血流诊断装置，其中通过频率分析器分析多普勒频移超声信息的频率以导出由N位数据表示的功率谱。 N位数据包括（K + M + L）位，其中K表示最高位位置中的二进制0的数量，并且在零与NM之间的范围内变化，M表示紧随在该位之后的固定数目的有效位二进制0和L表示紧跟在M个有效位之后的最低位位置中的无效位的数量，其中K + L等于NM。采用数据压缩技术通过数据转换电路将N比特数据转换为（m + 1）比特数据，其中m比特分别与M比特相同，l比特是二进制数 L位。微处理器从（m + 1）位输出数据信号中得出表示功率谱平均频率的信号。（m + 1）位输出数据信号由转换存储器转换成适合于通过将其重新转换为N位并将其对数压缩的算法显示的形式。

10. 发明授权

US4848356A Ultrasonic doppler blood flowmeter 失效
标题翻译：超声多普勒血流量计
公开(公告)号：US4848356A
公开(公告)日：1989-07-18
申请号：US253024
申请日：1988-10-04
申请人： Yasuhiro Nakamura , Masami Kawabuchi
发明人： Yasuhiro Nakamura , Masami Kawabuchi
IPC分类号： A61B8/06
CPC分类号： A61B8/06
摘要： An ultrasonic Doppler blood flowmeter measures the velocity of blood flow at an arbitrary position of the body of a subject by making use of Doppler shift of an ultrasonic echo signal. The echo signal including Doppler shift from the blood flow of the body is detected in phase on the basis of standard reference signal, and the distance to an intended position is extracted from the phase detected signal and is integrated, and the direct-current component or ultraflow frequency component of the Doppler shift signal obtained from the integrator means is fed back negatively to the integrator means. As a result, the echo signal components of the body tissues are removed, and the frequency of blood flow only can be analyzed, so that an accurate blood flow information may be obtained.

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