公开(公告)号：US08132462B2

公开(公告)日：2012-03-13

申请号：US11996532

申请日：2006-01-30

申请人： Takashi Azuma ,  Shinichiro Umemura ,  Tatsuya Nagata ,  Hiroshi Fukuda ,  Shuntaro Machida ,  Toshiyuki Mine

发明人： Takashi Azuma ,  Shinichiro Umemura ,  Tatsuya Nagata ,  Hiroshi Fukuda ,  Shuntaro Machida ,  Toshiyuki Mine

IPC分类号： G01N29/34 ,  H02N1/08

CPC分类号： A61B8/4483 ,  A61B8/08 ,  A61B8/4281 ,  B06B1/0292 ,  G01N29/2431 ,  G01S15/00

摘要： The receive sensitivity of an ultrasound array transducer structured with a diaphragm electro-acoustic transducer (101) being a basic unit is affected by change in a charge amount with elapsed time due to leakage or the like, which causes drift of the primary beam sensitivity, degradation in the acoustic SN ratio due to a rise in the acoustic noise level, and degradation in the directivity of an ultrasound beam. To addressing this problem, a charge controller (charge monitor 211) is provided to control charge in an electro-acoustic transducer (101). A charge monitoring section (102) monitors the change in the charge amount. When change in the charge amount is small, transmit sensitivity or receive sensitivity is calibrated by a controller (104) by, for example, multiplying a receive signal by a calibration coefficient corresponding to the change amount. Further, when the change in the charge amount is large, for example, charges can be re-emitted from a charge emitter (103).

摘要翻译： 由作为基本单元的隔膜电声换能器（101）构成的超声波阵列换能器的接收灵敏度受到由于泄漏等引起的经过时间的电荷量的变化的影响，导致主光束灵敏度的漂移， 由于声学噪声水平的上升引起的声学SN比的降低，以及超声波束的方向性的劣化。 为了解决这个问题，提供一种充电控制器（充电监视器211）来控制电声换能器（101）中的电荷。 充电监视部（102）监视充电量的变化。 当充电量的变化小时，通过例如将接收信号乘以对应于变化量的校准系数，由控制器（104）校准发射灵敏度或接收灵敏度。 此外，当电荷量的变化大时，例如，电荷可以从电荷发射体（103）重新发射。

公开(公告)号：US08118745B2

公开(公告)日：2012-02-21

申请号：US12039367

申请日：2008-02-28

申请人： Shinichiro Umemura ,  Takashi Azuma

发明人： Shinichiro Umemura ,  Takashi Azuma

IPC分类号： A61B8/00

CPC分类号： G01S15/8952 ,  G01S7/52046

摘要： With a natural number n, an ultrasound pulse having a center frequency of nf0 is transmitted, and an echo wave produced by the reflection at an acoustic-impedance interface within the object to be examined is received. Another ultrasound pulse having a center frequency of (n+1)f0 is transmitted, and, similarly, an echo wave produced by the reflection at an acoustic-impedance interface within the object to be examined is received. The received echo signal which has a center frequency of nf0 is raised to the power of (n+1) in a self-multiplication unit. Meanwhile, The received echo signal having a center frequency of (n+1)f0 is raised to the power of n in another self-multiplication unit. Each multiplication produces a signal having a center frequency of n(n+1)f0. A signed echo signal is obtained by a phase-sensitive detection between the two obtained signals.

摘要翻译： 利用自然数n，发送具有nf0的中心频率的超声波脉冲，并且接收通过被检体内的声阻抗界面的反射而产生的回波。 发送具有（n + 1）f0的中心频率的另一个超声波脉冲，同样地，接收由被检查物体内的声阻抗界面的反射产生的回波。 接收到的中心频率为nf0的回波信号在自乘单元中提高到（n + 1）的功率。 同时，具有中心频率（n + 1）f0的接收回波信号在另一个自乘单元中提高到n的功率。 每个乘法产生具有中心频率n（n + 1）f0的信号。 通过两个获得的信号之间的相敏检测来获得有符号回波信号。

公开(公告)号：US20100256494A1

公开(公告)日：2010-10-07

申请号：US12742468

申请日：2008-09-24

申请人： Takashi Azuma

发明人： Takashi Azuma

IPC分类号： A61B8/14

CPC分类号： A61B8/08 ,  A61B8/485 ,  G01S7/52042 ,  G01S7/5205 ,  G01S15/8977

摘要： An ultrasonic imaging system is provided that, when a deviation occurs between a predicted tissue moving direction and a displacement searching direction, can decrease an error caused by the deviation and thereby improve the accuracy of an elasticity image. An elastographic image in which a deviation in a displacement direction is corrected is created based on an RF displacement relating to an ultrasonic wave propagation direction that is calculated based on a cross-correlation between RF signals, and an ultrasonic wave propagation direction component map of applied pressure that uses a correction angle map determined based on a vector displacement map obtained by performing block matching between two-dimensional video images. According to this method, an image of an elasticity ratio can be acquired without a decrease in accuracy even if a tissue displacement vector deviates from the orientation of a normal line vector of a wave transmitting surface of an ultrasonic probe.

摘要翻译： 提供一种超声波成像系统，当在预测的组织移动方向和位移搜索方向之间发生偏差时，可以减少由偏差引起的误差，从而提高弹性图像的精度。 基于与基于RF信号之间的互相关计算的超声波传播方向的RF位移以及所施加的超声波传播方向分量图，创建其中校正位移方向的偏差的弹性图像 使用基于通过在二维视频图像之间执行块匹配而获得的向量位移图确定的校正角度图的压力。 根据该方法，即使组织位移矢量偏离超声波探头的波浪传送面的法线矢量的取向，也能够不降低精度而获得弹性率的图像​​。

公开(公告)号：US20090306505A1

公开(公告)日：2009-12-10

申请号：US12161960

申请日：2006-12-25

申请人： Hideki Yoshikawa ,  Takashi Azuma ,  Tatsuya Hayashi

发明人： Hideki Yoshikawa ,  Takashi Azuma ,  Tatsuya Hayashi

IPC分类号： A61B8/14

CPC分类号： A61B8/08 ,  A61B5/7475 ,  A61B8/463 ,  A61B8/5276 ,  G01S7/52074 ,  G01S7/52077 ,  G01S7/52084

摘要： Ultrasonic diagnostic equipment which displays a high contrast ultrasonic image enhancing the outline structure of an inspection object. More specifically, the motion vector of an object occurring between images used for addition is measured using a captured ultrasonic image, deformation processing is performed on accumulated addition image based on the measurement, and then addition processing is performed by multiplying the acquired image and the accumulated addition image by weighting coefficients.

摘要翻译： 超声波诊断设备，显示高对比度超声波图像，增强检查对象的轮廓结构。 更具体地，使用捕获的超声波图像来测量在用于添加的图像之间发生的对象的运动矢量，基于测量对累积的加法图像进行变形处理，然后通过将获取的图像与累积的 加权系数的加法图像。

公开(公告)号：US20090177091A1

公开(公告)日：2009-07-09

申请号：US11915625

申请日：2006-01-06

申请人： Shinichiro Umemura ,  Takashi Azuma ,  Tetsuya Hayashi ,  Naoyuki Murayama

发明人： Shinichiro Umemura ,  Takashi Azuma ,  Tetsuya Hayashi ,  Naoyuki Murayama

IPC分类号： A61B8/06

CPC分类号： G01S15/8981 ,  A61B8/06 ,  A61B8/488 ,  G01S15/8977

摘要： 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.

摘要翻译： 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：US09259205B2

公开(公告)日：2016-02-16

申请号：US13990063

申请日：2011-11-28

申请人： Tomohiko Tanaka ,  Takashi Azuma ,  Kunio Hashiba

发明人： Tomohiko Tanaka ,  Takashi Azuma ,  Kunio Hashiba

IPC分类号： A61B8/00 ,  A61B8/06 ,  A61B8/08

CPC分类号： A61B8/06 ,  A61B8/0883 ,  A61B8/0891 ,  A61B8/5246

摘要： Provided is a technology which quantitatively measures blood flow in the vicinity of circulatory organs. An ultrasound image capture device according to the present invention removes an image portion corresponding to an organ shape by taking the difference of a multi-frame ultrasound image, and thereafter computes a measured value of a blood flow velocity vector on the basis of a plurality of images at different timings (as per FIG. 3).

摘要翻译： 提供了一种定量测量循环器官附近血液流量的技术。 根据本发明的超声波图像捕获装置通过取多帧超声波图像的差异去除对应于器官形状的图像部分，然后基于多个超帧图像计算血流速度矢量的测量值 不同时间的图像（如图3所示）。

公开(公告)号：US09119557B2

公开(公告)日：2015-09-01

申请号：US13128350

申请日：2009-10-29

申请人： Hironari Masui ,  Takashi Azuma

发明人： Hironari Masui ,  Takashi Azuma

IPC分类号： A61B8/00 ,  A61B8/08 ,  G06T7/20

CPC分类号： A61B8/08 ,  A61B8/463 ,  A61B8/469 ,  A61B8/483 ,  A61B8/5246 ,  A61B8/5276 ,  G06T7/215 ,  G06T2207/10132

摘要： An ultrasonic image processing method and device, and an ultrasonic image processing program which can correspond to analytical methods different depending on a region or the purpose of a diagnosis or treatment. The ultrasonic image processing method comprises an image data creation step which stores a detection result obtained by irradiating a subject with ultrasonic waves by an irradiating section and detecting an ultrasonic signal from the subject by a detecting section and creates at least two-frame image data different in detection timing on the basis of the stored detection result, a motion vector distribution image creation step which creates a motion vector distribution image on the basis of a predetermined motion vector analysis through the use of a plurality frames of the image data, and a conversion step which converts a vector distribution image to a scalar distribution image on the basis of a plurality of established regions of interest (ROI).

摘要翻译： 一种超声波图像处理方法和装置，以及可以对应于根据诊断或治疗的区域或目的而不同的分析方法的超声波图像处理程序。 超声波图像处理方法包括：图像数据生成步骤，其通过照射部存储通过用超声波照射被检体而得到的检测结果，并通过检测部检测来自被检体的超声波信号，并生成不同的两帧图像数据 基于所存储的检测结果的检测定时，基于通过使用所述图像数据的多个帧，基于预定运动矢量分析来创建运动矢量分布图像的运动矢量分布图像创建步骤，以及转换 步骤，其基于多个建立的感兴趣区域（ROI）将矢量分布图像转换为标量分布图像。

公开(公告)号：US08971600B2

公开(公告)日：2015-03-03

申请号：US13263184

申请日：2010-04-07

申请人： Hideki Yoshikawa ,  Takashi Azuma

发明人： Hideki Yoshikawa ,  Takashi Azuma

IPC分类号： G06K9/00 ,  G06T7/00 ,  A61B8/00 ,  G01S15/89 ,  A61B8/06 ,  A61B8/13 ,  A61B8/08 ,  G01S7/52

CPC分类号： G01S15/8979 ,  A61B8/06 ,  A61B8/13 ,  A61B8/463 ,  A61B8/469 ,  A61B8/481 ,  A61B8/483 ,  G01S7/52071 ,  G01S15/8993

摘要： An ultrasonic diagnostic apparatus is provided for displaying a color map on which a difference in blood flow dynamics is reflected. Setting a test subject who is administered a contrast agent is assumed as an imaging target, and a probe transmits and receives ultrasonic waves to and from the target for contrast imaging. Image data is constructed based on signals received by the probe and a time-intensity curve is generated from intensity values of the image data. According to the time-intensity curve, a value of a predetermined parameter is calculated for producing a distribution image of blood flow dynamics. The distribution image (color map) of the blood flow dynamics is produced from the parameter value. The color map is a two-dimensional or a three-dimensional image being color-coded according to the parameter value. At least one of the followings may be used as the parameter; a contrast agent inflow start time, a balanced intensity arrival time, a contrast agent disappearance start time, a contrast agent duration, a preset threshold arrival time, an intensity increase rate, an intensity decrease rate, intensity of balanced state, and a total flow amount.

摘要翻译： 提供超声波诊断装置，用于显示反映血流动力学差异的色图。 设置施用造影剂的测试对象被认为是成像对象，并且探针向对象成像的目标发送和接收超声波。 图像数据是基于由探头接收的信号构成的，并且由图像数据的强度值产生时间 - 强度曲线。 根据时间 - 强度曲线，计算用于产生血流动力学分布图像的预定参数的值。 从参数值产生血流动力学的分布图像（颜色图）。 彩色图是根据参数值进行颜色编码的二维或三维图像。 可以使用以下中的至少一个作为参数; 造影剂流入开始时间，平衡强度到达时间，造影剂消失开始时间，造影剂持续时间，预设阈值到达时间，强度增加率，强度降低率，平衡状态强度和总流量 量。

公开(公告)号：US08867813B2

公开(公告)日：2014-10-21

申请号：US13503858

申请日：2010-10-26

申请人： Hironari Masui ,  Takashi Azuma

发明人： Hironari Masui ,  Takashi Azuma

IPC分类号： G06K9/00 ,  G06K9/32 ,  A61B8/08 ,  G06T7/00

CPC分类号： A61B8/085 ,  A61B8/5269 ,  G06K9/3233 ,  G06T7/0014 ,  G06T2207/10132 ,  G06T2207/30096

摘要： An ultrasonic imaging apparatus is provided, discriminates a noise area where echo signals are faint, by selecting a reference frame and a comparative frame from an image obtained by processing received signals and including a plurality of frames. A region of interest is set in the reference frame, a search area wider than the region of interest is set in the comparative frame, and multiple candidate regions being destination candidates of the region of interest are set within the search area. A degree of similarity between an image characteristic value in the region of interest and an image characteristic value in the candidate region is calculated, with respect to each of the candidate regions, to obtain a distribution of the degrees of similarity across the search area. Based on the similarity distribution, whether or not the region of interest corresponds to the noise area is determined.

摘要翻译： 提供超声波成像装置，通过从通过处理接收信号而获得并包括多个帧而获得的图像中选择参考帧和比较帧来鉴别回波信号是微弱的噪声区域。 将感兴趣区域设置在参考帧中，在比较帧中设置比感兴趣区域宽的搜索区域，并且将多个候选区域设置在搜索区域内。 针对每个候选区域，计算感兴趣区域中的图像特征值与候选区域中的图像特征值之间的相似度，以获得搜索区域上的相似度的分布。 基于相似度分布，确定感兴趣区域是否对应于噪声区域。

公开(公告)号：US08861812B2

公开(公告)日：2014-10-14

申请号：US12866712

申请日：2009-02-17

申请人： Hideki Yoshikawa ,  Takashi Azuma

发明人： Hideki Yoshikawa ,  Takashi Azuma

IPC分类号： A61B8/00 ,  A61B8/14 ,  A61B8/06 ,  G01S7/52

CPC分类号： A61B8/06 ,  G01S7/52033 ,  G01S7/52071 ,  G01S7/52074

摘要： Provided is an ultrasonic imaging apparatus including: a time-gain controller (TGC) that compensates an amplitude fading occurring in the process of propagation inside a living body; a scan converter (SC) that constructs image data; a TIC measurement unit that measures a TIC of each pixel; an evaluation index input unit that inputs an index for evaluating hemodynamics on the basis of a TIC; a mapping parameter estimation unit that estimates a mapping parameter comparable to an evaluation index; a TIC image construction unit that constructs a two-dimensional image on the basis of the mapping parameter; and a pixel detection unit that extracts a region corresponding to a color map from a TIC image, and utilizing a TIC measured with each pixel so as to measure a difference in hemodynamics.

摘要翻译： 提供一种超声波成像装置，包括：补偿在生物体内传播过程中发生的振幅衰落的时间增益控制器（TGC）; 构建图像数据的扫描转换器（SC）; TIC测量单元，测量每个像素的TIC; 评估指标输入单元，其输入用于基于TIC评估血液动力学的指标; 映射参数估计单元，其估计与评估指标相当的映射参数; TIC图像构造单元，其基于映射参数构建二维图像; 以及像素检测单元，其从TIC图像提取与颜色映射相对应的区域，并且利用用每个像素测量的TIC来测量血液动力学的差异。