公开(公告)号：US20100049042A1

公开(公告)日：2010-02-25

申请号：US12374065

申请日：2007-06-14

申请人： Takashi Azuma

发明人： Takashi Azuma

IPC分类号： A61B8/00

CPC分类号： A61B8/00 ,  G01S7/52044 ,  G01S7/52077 ,  G01S7/52084

摘要： The present invention makes it possible to provide an ultrasonogram having a preferable spatial resolution and signal/noise ratio. A signal dynamic range is measured to determine a position either for adaptively switching between linear interpolation and sinc function interpolation or for employing a weighted average of interpolated values according to these interpolation methods. In the former case, a depth point for switching between linear interpolation and sinc function interpolation may be previously stored in a depth storage unit 21, and an interpolation method for use may be switched between these two methods at the interpolation method transition depth.

摘要翻译： 本发明使得可以提供具有优选的空间分辨率和信号/噪声比的超声波图。 测量信号动态范围以确定用于在线性插值和正弦函数插值之间进行自适应切换或者根据这些插值方法采用内插值的加权平均的位置。 在前一种情况下，用于切换线性插补和正弦函数插值的深度点可以预先存储在深度存储单元21中，并且可以在插值方法转换深度的这两种方法之间切换使用的插值方法。

公开(公告)号：US20100022878A1

公开(公告)日：2010-01-28

申请号：US12373912

申请日：2007-06-19

申请人： Takashi Azuma ,  Hironari Masui ,  Shin-ichiro Umemura

发明人： Takashi Azuma ,  Hironari Masui ,  Shin-ichiro Umemura

IPC分类号： A61B8/14

CPC分类号： G06T5/002 ,  G01S7/52077 ,  G06T5/003 ,  G06T2207/10132 ,  G06T2207/30004

摘要： Non-linear processing is performed in which noise reduction (smoothing) is serially performed for original data to reduce high-frequency noise components, the edge enhancement processing is performed for the smoothed image and, after that, noise components are reduced again. Finally, the created image is weighted-combined with the original image.

摘要翻译： 执行对原始数据串行执行降噪（平滑）以减少高频噪声分量的非线性处理，对平滑图像执行边缘增强处理，之后再次降低噪声分量。 最后，将创建的图像与原始图像进行加权组合。

公开(公告)号：US20090301199A1

公开(公告)日：2009-12-10

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). The series of operations is controlled by the controller (104), and thus sensitivity variation caused by difference in the changes with elapsed time, particularly between the plural transducers, is calibrated.

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。 一系列操作由控制器（104）控制，因此校正了由于经过时间的变化，特别是多个换能器之间的差异引起的灵敏度变化。

公开(公告)号：US20090118617A1

公开(公告)日：2009-05-07

申请号：US12348135

申请日：2009-01-02

申请人： Takashi Azuma ,  Shin-ichiro Umemura ,  Hirotaka Baba

发明人： Takashi Azuma ,  Shin-ichiro Umemura ,  Hirotaka Baba

IPC分类号： A61B8/14

CPC分类号： A61B8/00 ,  G01S7/52077 ,  G01S15/8995

摘要： In an ultrasonic imaging device having an image synthesizing unit, correlation between images to be synthesized is computed for balancing between an improvement in contrast resolution and an improvement in spatial resolution, and an amount of displacement between the images is computed. When the amount of displacement is large, the signals after envelop detection are synthesized. When the amount of displacement is small, RF signals are synthesized. Alternatively, the mixing frequency may be variable according to the amount of displacement, and the balance between an improvement in spatial resolution and that in contract resolution is achieved according to a degree of the positional displacement.

摘要翻译： 在具有图像合成单元的超声波成像装置中，计算要合成的图像之间的相关性，以在对比度分辨率的提高和空间分辨率的改善之间进行平衡，并且计算图像之间的位移量。 当位移量大时，合成包络检测后的信号。 当位移量小时，合成RF信号。 或者，混合频率可以根据位移量而变化，并且根据位置偏移的程度来实现空间分辨率和合同分辨率的改善之间的平衡。

公开(公告)号：US07473226B2

公开(公告)日：2009-01-06

申请号：US10562465

申请日：2004-06-09

申请人： Takashi Azuma ,  Shin-ichiro Umemura ,  Hirotaka Baba

发明人： Takashi Azuma ,  Shin-ichiro Umemura ,  Hirotaka Baba

IPC分类号： A61B8/00

CPC分类号： A61B8/00 ,  G01S7/52077 ,  G01S15/8995

摘要： In an ultrasonic imaging device having an image synthesizing unit, correlation between images to be synthesized is computed for balancing between an improvement in contrast resolution and an improvement in spatial resolution, and an amount of displacement between the images is computed. When the amount of displacement is large, the signals after envelop detection are synthesized. When the amount of displacement is small, RF signals are synthesized. Alternatively, the mixing frequency may be variable according to the amount of displacement, and the balance between an improvement in spatial resolution and that in contract resolution is achieved according to a degree of the positional displacement.

摘要翻译： 在具有图像合成单元的超声波成像装置中，计算要合成的图像之间的相关性，以在对比度分辨率的提高和空间分辨率的改善之间进行平衡，并且计算图像之间的位移量。 当位移量大时，合成包络检测后的信号。 当位移量小时，合成RF信号。 或者，混合频率可以根据位移量而变化，并且根据位置偏移的程度来实现空间分辨率和合同分辨率的改善之间的平衡。

公开(公告)号：US07473225B2

公开(公告)日：2009-01-06

申请号：US10618750

申请日：2003-07-15

申请人： Takashi Azuma ,  Shin-ichiro Umemura ,  Yuichi Miwa

发明人： Takashi Azuma ,  Shin-ichiro Umemura ,  Yuichi Miwa

IPC分类号： A61B8/00

CPC分类号： G01S7/52049 ,  G01S7/52026 ,  G01S15/899 ,  G10K11/346

摘要： There are provided an ultrasonic imaging system and method which can correct a phase shift effect to image a real change in acoustic impedance in a living body.An ultrasonic probe transmits an ultrasonic beam to an object to receive an echo. A transmit beamformer transmits a transmit signal via transmit/receive SWs to the probe in delay time matched with a transmit focal point according to the signal under the control of a control system. An ultrasonic signal returned from the object to the probe is converted to an electric signal by the probe to be transmitted via the transmit/receive SWs to a complex receive beamformer. The complex receive beamformer performs dynamic focus adjusting delay time according to reception timing. A phase shift correction part uses the output of the complex beamformer outputting beams of a real part and an imaginary part to correct phase shift. due to frequency-dependent attenuation, correct phase shift in the lateral direction of the beam, or correct both. After phase shift correction, an acoustic impedance change amount operation part obtains a derivative about the space position of acoustic impedance. The signal subject to filtering processing is image displayed via a scan converter on a display part.

摘要翻译： 提供了一种超声波成像系统和方法，其可以校正相移效应以对活体中的声阻抗的真实变化进行成像。 超声探头将超声波束发送到物体以接收回波。 发射波束形成器根据在控制系统的控制下的信号，以与发射焦点相匹配的延迟时间，经由发射/接收SW向发射器发射发射信号。 从物体返回到探头的超声波信号被探头转换成电信号，以通过发射/接收SW发送到复接收波束形成器。 复接收波束形成器根据接收定时执行动态聚焦调整延迟时间。 相移校正部分使用输出实部和虚部的波束形成器的输出来校正相移。 由于频率依赖的衰减，在横向的方向上的正确相移，或者纠正两者。 在相移校正之后，声阻抗变化量操作部分获得关于声阻抗的空间位置的导数。 经过滤波处理的信号是通过显示部分上的扫描转换器显示的图像。

公开(公告)号：US20080208054A1

公开(公告)日：2008-08-28

申请号：US11947020

申请日：2007-11-29

申请人： Takashi Azuma ,  Kenichi Kawabata

发明人： Takashi Azuma ,  Kenichi Kawabata

IPC分类号： A61B8/13

CPC分类号： A61B8/463 ,  A61B8/481 ,  G01S7/52022 ,  G01S7/52038 ,  G01S15/102 ,  G01S15/895 ,  G01S15/8977

摘要： An ultrasonic imaging apparatus, detecting a signal peculiar to a contrast agent emitted when liquid formed in a fine particle vaporizes due to ultrasonic waves and imaging space distribution thereof. A narrow band is used for transmission, a broad band is used for a received signal, and in a state of high space resolution of the received signal, a transmission signal and the received signal are discriminated.

摘要翻译： 一种超声波成像装置，用于检测由于超微波而产生的微粒子中形成的液体发生的造影剂特有的信号及其成像空间分布。 窄带用于传输，宽频带用于接收信号，并且在接收信号的高空间分辨率的状态下，识别发射信号和接收信号。

公开(公告)号：US20070068266A1

公开(公告)日：2007-03-29

申请号：US11492961

申请日：2006-07-26

申请人： Tsukasa Fujimori ,  Natsuki Yokoyama ,  Hiroshi Fukuda ,  Yuko Hanaoka ,  Takashi Azuma

发明人： Tsukasa Fujimori ,  Natsuki Yokoyama ,  Hiroshi Fukuda ,  Yuko Hanaoka ,  Takashi Azuma

IPC分类号： G01L9/12

CPC分类号： G01L9/0073 ,  B60C23/0408 ,  G01D5/2417 ,  G01L9/12 ,  G01L27/007

摘要： A sensor and sensor module with small power consumption and high reliability are disclosed. The sensor includes a capacitor having a capacitance varying with a physical quantity, a capacitance-voltage conversion circuit for converting the capacitance of the capacitor into a voltage, and a control signal generation circuit for generating a plurality of control signals. The capacitor has a frequency-capacitance characteristic with a resonant frequency. In a measurement of the physical quantity, the capacitance of the capacitor is measured with one of the control signals having a first frequency which is much higher or much lower than the resonant frequency. In a self-diagnosis of the sensor, the capacitance of the capacitor is measured with another one of the control signals having a second frequency which is equal or close to the resonant frequency.

摘要翻译： 公开了具有小功耗和高可靠性的传感器和传感器模块。 传感器包括具有物理量变化的电容的电容器，用于将电容器的电容转换为电压的电容 - 电压转换电路，以及用于产生多个控制信号的控制信号产生电路。 电容器具有谐振频率的频率 - 电容特性。 在物理量的测量中，电容器的电容被测量，其中一个控制信号具有比谐振频率高得多或低得多的第一频率。 在传感器的自诊断中，电容器的电容用另一个控制信号测量，其中第二频率等于或接近谐振频率。

公开(公告)号：US20060284519A1

公开(公告)日：2006-12-21

申请号：US11341655

申请日：2006-01-30

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

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

IPC分类号： H01L41/00

CPC分类号： B06B1/0292

摘要： The present invention aims to stabilize sound-electricity conversion characteristics of a diaphragm-type sound-electricity conversion device as well as to decrease the noise level of an ultrasonic diagnostic apparatus using the sound-electricity conversion device. The sound-electricity conversion device is configured by a capacitor cell including a lower electrode formed on a silicon substrate and an upper electrode over the lower electrode, the lower and upper electrodes sandwiching a cavity. An electrode short-circuit prevention film is formed on the upper electrode on the cavity side. The electrode short-circuit prevention film is formed of a material with an electrical time constant shorter than 1 second and longer than 10 microseconds, such as silicon nitride containing a stoichiometrically excessive amount of silicon. As a result, the electrode short-circuit prevention film has small electric conductivity, and thus it is made possible to prevent the film from being charged with electric charge and to avoid the drift of the electric charge. Consequently, the sound-electricity conversion characteristics of the sound-electricity conversion device stabilize, and further the sound noise level of the ultrasonic diagnostic apparatus decreases.

摘要翻译： 本发明旨在稳定隔膜式声电转换装置的声电转换特性，并且降低使用声电转换装置的超声波诊断装置的噪声水平。 声电转换装置由包括形成在硅基板上的下电极和下电极上的上电极的电容器单元构成，下电极和上电极夹着空腔。 在空腔侧的上部电极上形成电极短路防止膜。 电极短路防止膜由电气时间常数短于1秒且长于10微秒的材料形成，例如含有化学计量过量的硅的氮化硅。 结果，电极短路防止膜具有小的导电性，因此可以防止膜被充电并避免电荷的漂移。 因此，声电转换装置的声电转换特性稳定，超声波诊断装置的声音噪声水平进一步降低。

公开(公告)号：US06929717B2

公开(公告)日：2005-08-16

申请号：US09899601

申请日：2001-07-06

申请人： Takashi Azuma ,  Makoto Suzuki ,  Nobuhiro Horiuchi

发明人： Takashi Azuma ,  Makoto Suzuki ,  Nobuhiro Horiuchi

IPC分类号： D21F13/00

CPC分类号： D21F13/00

摘要： 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.

摘要翻译： 制造纸的装置包括搅拌槽和造纸部。 搅拌槽包括：外筒; 与所述外筒同心地设置的中筒; 原料供给口，用于将原料供给到所述搅拌槽中; 搅拌机制; 以及用于将外筒和中筒保持在预定位置的顶板。 造纸部安装在搅拌槽的下方，包括：丝网和具有用于保持丝网的开口的造纸架，开口连接到抽吸单元。 搅拌机构均匀地设置在丝布上方。 此外，多个原料供给口均匀地设置在丝布的上方。