公开(公告)号：US20120224759A1

公开(公告)日：2012-09-06

申请号：US13503858

申请日：2010-10-26

Applicant: Hironari Masui ,  Takashi Azuma

Inventor： Hironari Masui ,  Takashi Azuma

IPC: G06K9/62

CPC classification number: A61B8/085 ,  A61B8/5269 ,  G06K9/3233 ,  G06T7/0014 ,  G06T2207/10132 ,  G06T2207/30096

Abstract: An ultrasonic imaging apparatus is provided, which is capable of discriminating a noise area where echo signals are faint. The ultrasonic imaging apparatus selects a reference frame and a comparative frame from an image made up of two or more frames, the image being obtained by processing received signals. A region of interest is set in the reference frame, and a search area wider than the region of interest is set in the comparative frame, multiple candidate regions being destination candidates of the region of interest are set within the search area, a degree of similarity of an image characteristic value between in the region of interest and in the candidate region is calculated, with respect to each of the candidate regions, so as to obtain a distribution of the degrees of similarity across the search area. With this configuration, based on the similarity distribution, it is possible to determine whether or not the region of interest corresponds to the noise area. By way of example, it is configured such that statistics is obtained, which compares a minimum value of the degree of similarity with an overall value thereof in the similarity distribution. By comparing the statistics with a threshold value, it is possible to determine confidence of the region of interest.

Abstract translation: 提供了一种能够区分回波信号微弱的噪声区域的超声波成像装置。 超声波成像设备从由两个或更多个帧组成的图像中选择参考帧和比较帧，该图像是通过处理接收到的信号获得的。 感兴趣区域被设置在参考帧中，并且在比较帧中设置比感兴趣区域更宽的搜索区域，作为感兴趣区域的目的地候选的多个候选区域被设置在搜索区域内，相似度 对于每个候选区域，计算感兴趣区域和候选区域之间的图像特征值，以便获得搜索区域上的相似度的分布。 利用该配置，基于相似度分布，可以确定感兴趣的区域是否对应于噪声区域。 作为示例，配置为获得在相似度分布中将相似度的最小值与其总体值进行比较的统计。 通过将统计量与阈值进行比较，可以确定感兴趣区域的置信度。

公开(公告)号：US20120136250A1

公开(公告)日：2012-05-31

申请号：US13386184

申请日：2010-08-04

Applicant: Marie Tabaru ,  Takashi Azuma ,  Kunio Hashiba

Inventor： Marie Tabaru ,  Takashi Azuma ,  Kunio Hashiba

IPC: A61B8/00

CPC classification number: A61B8/08 ,  A61B8/14 ,  A61B8/4488 ,  A61B8/485 ,  G01S7/52026 ,  G01S7/52038 ,  G01S7/52042 ,  G01S15/8954

Abstract: In a radiation-pressure elastography technique for transmitting a ultrasound focused beam into a test object body and diagnosing the hardness thereof, it is required to consider high sensitivity and safety.In the present invention, the focused beam is transmitted to two positions as a means for displacing a tissue and exciting a shear wave. In addition, time control is performed in such a manner that a transmit beam serves as a burst-chirp signal, and ultrasound waves are transmitted and received while sweeping a transmit frequency. On this occasion, when the distance between the two focused points and the transmit frequency become integral multiple of the wavelength, two waves interfere with each other, thereby obtaining a large amplitude. Furthermore, when the transmit frequency becomes equal to a resonance frequency peculiar to the tissue, the amplitude also becomes larger. Accordingly, a small intensity of transmit waveform enhances sensitivity. In addition, transmission using the burst-chirp signal facilitates widening of a bandwidth of the transmit frequency, enabling usage of a frequency highly sensitive for a target measurement site. Optional number of focused points and arbitrary positions thereof allow a wide area to be covered.

Abstract translation: 在用于将超声聚焦光束传输到测试对象体内并且诊断其硬度的放射压弹性成像技术中，需要考虑高灵敏度和安全性。 在本发明中，聚焦光束作为用于移动组织并激发剪切波的装置被传送到两个位置。 此外，以发射波束用作脉冲串啁啾信号的方式执行时间控制，并且在扫描发射频率的同时发射和接收超声波。 在这种情况下，当两个聚焦点和发射频率之间的距离成为波长的整数倍时，两个波彼此干涉，从而获得大的振幅。 此外，当发射频率等于组织特有的共振频率时，振幅也变大。 因此，小的发射波长强度提高了灵敏度。 此外，使用脉冲串啁啾信号的传输有助于扩大发射频率的带宽，使得能够使用对于目标测量站点高度敏感的频率。 可选数量的聚焦点和任意位置允许覆盖广泛的区域。

公开(公告)号：US07946992B2

公开(公告)日：2011-05-24

申请号：US11915625

申请日：2006-01-06

Applicant: Shinichiro Umemura ,  Takashi Azuma ,  Tetsuya Hayashi ,  Naoyuki Murayama

Inventor： Shinichiro Umemura ,  Takashi Azuma ,  Tetsuya Hayashi ,  Naoyuki Murayama

IPC: A61B8/00

CPC classification number: G01S15/8981 ,  A61B8/06 ,  A61B8/488 ,  G01S15/8977

Abstract: The present invention is to provide a velocity measuring method and a velocity measuring device for carrying out the method. The velocity measuring method includes: a step (S4) for expanding N time series signals by using 0-th to (N−1)-th degree discrete Legendre function as a base; a step (S5) for calculating 2n-th degree complex expansion coefficient by multiplying a linear combination of a (2n−1)-th degree expansion coefficient and a ( 2n+1)-th degree expansion coefficient by an imaginary unit and then linearly combining the result and a 2n-th degree expansion coefficient, and calculating a (2n+1)-th degree complex expansion coefficient by multiplying the (2n+1)-th degree expansion coefficient by an imaginary unit and then linearly combining the result, the 2n-th degree expansion coefficient and a (2n+2)-th degree expansion coefficient; a degree decision step (S4) for determining the degree m of a coefficient having the maximum absolute value among the complex expansion coefficients; and a step (S8) for calculating a signed velocity signal concerning a moving reflection object from a ratio of square sums of the expansion coefficients or complex expansion coefficients corresponding to the degree m.

Abstract translation: 本发明提供一种用于实施该方法的速度测量方法和速度测量装置。 速度测量方法包括：通过使用第0到第（N-1）度离散勒让德函数作为基础来扩展N个时间序列信号的步骤（S4） 通过将第（2n-1）个膨胀系数和第（2n + 1）次膨胀系数的线性组合乘以虚数单位然后线性地计算2n倍复数膨胀系数的步骤（S5） 组合结果和2n度膨胀系数，并且通过将第（2n + 1）度膨胀系数乘以虚数单位然后将结果线性组合来计算第（2n + 1）度复数膨胀系数， 第2n度膨胀系数和第（2n + 2）膨胀系数; 用于确定复数展开系数中具有最大绝对值的系数的程度m的度决定步骤（S4） 以及用于根据与度数m对应的展开系数或复扩展系数的平方和的比率来计算关于移动反射物体的有符号速度信号的步骤（S8）。

公开(公告)号：US20090163816A1

公开(公告)日：2009-06-25

申请号：US11597325

申请日：2004-11-10

Applicant: Takashi Azuma ,  Shin-ichiro Umemura ,  Hideyo Kamada

Inventor： Takashi Azuma ,  Shin-ichiro Umemura ,  Hideyo Kamada

IPC: A61B8/06

CPC classification number: A61B8/06

Abstract: The present invention provides an ultrasonic diagnostic apparatus realizing improved visibility of a contour shape of signal components in an ultrasonic blood flow spectrum display image. The apparatus includes a gray-level correction unit for correcting intensity of an output result of a Doppler processing unit. The Doppler processing unit calculates a Doppler frequency shift in a reception signal output from a receiver and calculates blood flow velocity of a subject on the basis of the Doppler frequency shift. The gray-level correction unit has: a filtering unit for separating a signal and a noise from each other, which are included in a time-varying waveform of the blood flow velocity of the subject obtained by the Doppler processing unit on the basis of continuity on a space defined by the blood flow velocity and time; and a gray-level corrector for performing a gray level correction using, as a parameter, a boundary value between signal intensity and noise intensity obtained by the filtering unit.

Abstract translation: 本发明提供一种实现超声波血流频谱显示图像中的信号成分的轮廓形状的可视化的超声波诊断装置。 该装置包括用于校正多普勒处理单元的输出结果的强度的灰度级校正单元。 多普勒处理单元计算从接收器输出的接收信号中的多普勒频移，并根据多普勒频移计算被检者的血流速度。 灰度级校正单元具有：滤波单元，用于将信号和噪声彼此分离，所述滤波单元包括在由多普勒处理单元基于连续性获得的对象的血流速度的时变波形中 在由血流速度和时间限定的空间上; 以及灰度级校正器，用于使用由滤波单元获得的信号强度和噪声强度之间的边界值作为参数来执行灰度校正。

公开(公告)号：US20080077011A1

公开(公告)日：2008-03-27

申请号：US11838263

申请日：2007-08-14

Applicant: TAKASHI AZUMA ,  Hideki Yoshikawa

Inventor： TAKASHI AZUMA ,  Hideki Yoshikawa

IPC: A61B8/08

CPC classification number: G06T7/215 ,  A61B8/0833 ,  G06T2207/10132 ,  G06T2207/30096

Abstract: An edge between a tumor and a normal tissue is detected even when acoustic impedance and elasticity of those are not changed. An edge position of tissue is estimated by setting a plurality of estimation regions of an inspection object, detecting direction of motion of the inspection object within each estimation region, and computing the point of inflexion in the direction of motion. Moreover, these edge positions are overlapped on the cross-sectional images and thereby an operator can easily detect the edge lines.

Abstract translation: 即使在没有改变声阻抗和弹性的情况下，也检测肿瘤与正常组织之间的边缘。 通过设置检查对象的多个估计区域，检测检查对象在各估计区域内的运动方向，并计算运动方向的拐点来估计组织的边缘位置。 此外，这些边缘位置在横截面图像上重叠，从而操作者可以容易地检测边缘线。

公开(公告)号：US20080027318A1

公开(公告)日：2008-01-31

申请号：US11719770

申请日：2005-07-15

Applicant: Shin-ichiro Umemura ,  Takashi Azuma ,  Yuichi Miwa

Inventor： Shin-ichiro Umemura ,  Takashi Azuma ,  Yuichi Miwa

IPC: A61B8/00

CPC classification number: G01S15/8993 ,  A61B8/483 ,  G01S7/5202 ,  G01S7/52046 ,  G01S7/5209 ,  G01S7/52095

Abstract: An ultrasonographic technique capable of forming a transmission beam enabling multi-beam transmission/reception of identical transmission sensitivity. An ultrasonographic device for imaging inside of an examinee includes a transmitter for transmitting an ultrasonic pulse signal from an ultrasonic element array to the examinee, and a receiver for receiving the ultrasonic pulse reflected from the examinee. The transmitter transmits an ultrasonic pulse signal having a plurality of peaks of substantially equal transmission intensity in the azimuth direction and a trace in the depth direction of each peak as a substantially straight line, from a transmission opening of the ultrasonic element array to the examinee.

Abstract translation: 一种能够形成能够实现相同传输灵敏度的多波束发射/接收的传输波束的超声波技术。 用于在受检者内部成像的超声波诊断装置包括用于从超声波元件阵列向受检者发送超声波脉冲信号的发射器，以及用于接收从受检者反射的超声波脉冲的接收器。 发射机从超声波元件阵列的传输开口向受检者发送具有在方位方向上具有基本相等的传输强度的多个峰值和超过每个峰值深度方向的迹线作为基本上直线的超声波脉冲信号。

公开(公告)号：US20070239014A1

公开(公告)日：2007-10-11

申请号：US11675711

申请日：2007-02-16

Applicant: Hideki YOSHIKAWA ,  Takashi AZUMA

Inventor： Hideki YOSHIKAWA ,  Takashi AZUMA

IPC: A61B8/00

CPC classification number: A61B8/5276 ,  A61B8/06 ,  A61B8/13

Abstract: Blood-flow image display equipment for displaying a CFM image that is not affected by a motion of a tissue in an object area during capturing of images or is affected in a reduced manner. The blood-flow image display equipment has following components: a transmitting controller for controlling transmission triggers of a signal for B-mode and a signal for CFM based on a velocity of motion of an object; an ultrasonic transducer in which piezoelectric ultrasonic transducers each for transmitting/receiving an ultrasonic wave to/from the object are arranged in the form of an array; a B-mode image construction unit for constructing a B-mode image with received signals; a motion detector for measuring a motion vector of the object using the B-mode image; a receiving unit for CFM signal for receiving the signal for CFM from the ultrasonic transducer; a time-series signal storage unit for CFM that collects a CFM measurement region located in the same area of the object based on the motion vector measured by the motion detector and stores them in memory in time sequence; and an autocorrelation processing unit for performing autocorrelation processing on time-series CFM signals.

Abstract translation: 用于在拍摄图像期间显示不受物体区域内的组织的运动影响的CFM图像的血流图像显示设备，或者以减少的方式影响。 血流图像显示装置具有以下部件：发送控制器，用于基于物体的运动速度控制用于B模式的信号的传输触发和用于CFM的信号; 超声波换能器以阵列的形式布置有用于向/从物体发送/接收超声波的压电超声换能器， B模式图像构造单元，用于构造具有接收信号的B模式图像; 运动检测器，用于使用B模式图像测量对象的运动矢量; 用于CFM信号的接收单元，用于从超声换能器接收用于CFM的信号; 用于CFM的时间序列信号存储单元，其基于由运动检测器测量的运动矢量来收集位于对象的相同区域中的CFM测量区域，并将它们以时间顺序存储在存储器中; 以及自相关处理单元，用于对时间序列CFM信号执行自相关处理。

公开(公告)号：US20070161897A1

公开(公告)日：2007-07-12

申请号：US10557237

申请日：2004-05-18

Applicant: Kazuaki Sasaki ,  Takashi Azuma ,  Ken-ichi Kawabata ,  Shin-ichiro Umemura ,  Takashi Okai ,  Tetsuya Ishikawa

Inventor： Kazuaki Sasaki ,  Takashi Azuma ,  Ken-ichi Kawabata ,  Shin-ichiro Umemura ,  Takashi Okai ,  Tetsuya Ishikawa

IPC: A61B8/00

CPC classification number: A61N7/02 ,  A61B8/06 ,  A61B8/13 ,  A61B2090/378

Abstract: Ultrasonic treatment equipment is provided which repeats therapeutic ultrasound exposure while measuring a degree of vessel constriction on a therapeutic ultrasound exposure basis. This equipment includes: a therapeutic ultrasonic transducer 2 which exposes a blood vessel of an affected part to a focused therapeutic ultrasonic wave for a specified period of exposure time; an imaging ultrasonic probe 3 which images an ultrasound tomographic image of the affected part; a display unit 24 which displays the ultrasound tomographic image; means 21 for detecting a blood flow signal from a signal received by the imaging ultrasonic probe and determining the blood flow velocity of the blood vessels of the affected part; means 21 for calculating a rate of change in blood flow velocity during the exposure to the therapeutic ultrasonic wave or before and after the exposure to the therapeutic ultrasonic wave; and means 23 for controlling exposure conditions of the therapeutic ultrasonic wave on the basis of the rate of change in blood flow velocity, and thereby controlling the therapeutic ultrasonic transducer.

Abstract translation: 提供超声波处理设备，其在治疗超声暴露基础上测量血管收缩程度时重复治疗性超声波暴露。 该设备包括：治疗超声波换能器2，其将受影响部分的血管暴露于聚焦的治疗超声波达指定的曝光时间; 成像超声波探头3，其对受影响部分的超声断层图像进行成像; 显示单元24，其显示超声断层图像; 用于从由成像超声波探头接收的信号中检测血流信号并确定受影响部分的血管的血流速度的装置21; 用于计算暴露于治疗超声波期间或暴露于治疗超声波之前和之后的血流速度变化率的装置21; 以及基于血流速度变化率来控制治疗超声波的暴露条件的装置23，由此控制治疗用超声波换能器。

公开(公告)号：US20050236130A1

公开(公告)日：2005-10-27

申请号：US11165042

申请日：2005-06-24

Applicant: Takashi Azuma ,  Makoto Suzuki ,  Nobuhiro Horiuchi

Inventor： Takashi Azuma ,  Makoto Suzuki ,  Nobuhiro Horiuchi

IPC: D21F13/00 ,  D21J7/00

CPC classification number: D21F13/00

Abstract: An apparatus for making paper includes a stirring tank and a paper making portion. The stirring tank includes: an outer cylinder; a middle cylinder disposed concentrically with the outer cylinder; a raw-material feeding port for feeding raw-material into said stirring tank; a stirring mechanisms; and a top plate for holding the outer and middle cylinders in a predetermined position. The paper making portion is installed below the stirring tank and includes: a wire cloth and a paper making frame having an opening for holding said wire cloth, and the opening is connected to a suction unit. The stirring mechanisms are uniformly disposed above the wire cloth. In addition, a plurality of raw-material feeding ports are uniformly disposed above the wire cloth.

公开(公告)号：US6067314A

公开(公告)日：2000-05-23

申请号：US891273

申请日：1997-07-10

Applicant: Takashi Azuma

Inventor： Takashi Azuma

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/7087 ,  H04L7/00 ,  H04B15/00

CPC classification number: H04B1/708 ,  H04B1/71

Abstract: Filter coefficients of matched filters are set equivalent to those of a circuit for multiplying spread spectrum code signals of different frequencies, and a correlation value between each of the spread spectrum code signals and spread spectrum signal data. Such correlation values are averaged by their corresponding square circuits and adders. In a maximum-value selection circuit, the averaged correlation values are monitored for a plurality of samples, thus obtaining both an amount of correction of frequency deviation of carrier wave from the frequency of a pass having the largest one of the correlation values (the most matching frequency) and an amount of phase correction of the spread spectrum signal from positional information (phase information) of a sample of the pass having the largest correlation value.

Abstract translation: 匹配滤波器的滤波器系数被设置为与用于乘以不同频率的扩频码信号的电路的滤波器系数以及每个扩频码信号和扩频信号数据之间的相关值。 这些相关值通过它们相应的平方电路和加法器进行平均。 在最大值选择电路中，针对多个采样来监视平均相关值，从而获得载波频偏的校正量与具有最大相关值的最大频率（最多 匹配频率）和从具有最大相关值的通过样本的位置信息（相位信息）的扩频信号的相位校正量。