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1. 发明授权

US07860258B2 Electro-acoustic transducer device 有权
标题翻译：电声换能器装置
公开(公告)号：US07860258B2
公开(公告)日：2010-12-28
申请号：US11491198
申请日：2006-07-24
申请人： Takashi Azuma , Shin-ichiro Umemura , Tatsuya Nagata , Hiroshi Fukuda , Shuntaro Machida , Toshiyuki Mine
发明人： Takashi Azuma , Shin-ichiro Umemura , Tatsuya Nagata , Hiroshi Fukuda , Shuntaro Machida , Toshiyuki Mine
IPC分类号： H04R25/00
CPC分类号： B06B1/0292 , H04R19/005
摘要： A transducer for transmitting and receiving ultrasonic waves to a diaphragm-based ultrasonic transducer device using silicon as a base material. An electro-acoustic transducer device which can have a first electrode formed on top of, or inside, a substrate and having a thin film provided on top of the substrate. The device can also have a second electrode formed on top of, or inside, the thin film. A void layer can be provided between the first electrode and the second electrode. A charge-storage layer can be provided between the first electrode and the second electrode. A source electrode and a drain electrode can also be provided for measuring a quantity of electricity stored in the charge-storage layer.
摘要翻译：一种用于将超声波发送和接收到使用硅作为基材的基于隔膜的超声波换能器装置的换能器。一种电声换能器装置，其可以具有形成在基板的顶部或内部并且具有设置在基板顶部上的薄膜的第一电极。该器件还可以具有形成在薄膜的顶部或内部的第二电极。可以在第一电极和第二电极之间设置空隙层。可以在第一电极和第二电极之间设置电荷存储层。还可以提供源电极和漏电极来测量存储在电荷存储层中的电量。

2. 发明申请

US20070057603A1 Electro-acoustic transducer device 有权
标题翻译：电声换能器装置
公开(公告)号：US20070057603A1
公开(公告)日：2007-03-15
申请号：US11491198
申请日：2006-07-24
申请人： Takashi Azuma , Shin-ichiro Umemura , Tatsuya Nagata , Hiroshi Fukuda , Shuntaro Machida , Toshiyuki Mine
发明人： Takashi Azuma , Shin-ichiro Umemura , Tatsuya Nagata , Hiroshi Fukuda , Shuntaro Machida , Toshiyuki Mine
IPC分类号： H01L41/09
CPC分类号： B06B1/0292 , H04R19/005
摘要： In a semiconductor diaphragm type electro-acoustic transducer device having no necessity for a DC bias voltage applied as a result of a charge-stored layer being provide between electrodes, electro-mechanical conversion efficiency undergoes a change owing to time-dependent change in a quantity of stored electricity due to leakage of charge, and so forth. As for sensitivity of signal reception, provided by an ultrasonic array-transducer made up of the electro-acoustic transducer devices each as a basic unit, not only a main beam sensitivity undergoes drift as a result of drift in the electromechanical conversion efficiency, but also there result deterioration in an acoustic S/N ratio, and deterioration in directionality of an ultrasonic beam. In order to resolve those problems, there is provided an electro-acoustic transducer device comprising a first electrode formed on top of, or inside a substrate, a thin film using silicon or a silicon compound as a base material thereof, provided on top of the substrate, a second electrode formed on top of, or inside the thin film, a void layer provided between the first electrode and the second electrode, a charge-stored layer for storing charge given by the first electrode and the second electrode, provided between the first electrode and the second electrode, and a source electrode and a drain electrode, for measuring a quantity of electricity stored in the charge-storage layer.
摘要翻译：在半导体膜式电声换能器装置中，由于在电极之间提供电荷存储层，所以不需要施加直流偏置电压，电 - 机转换效率由于时间上的变化而发生变化由于电荷泄漏而导致的储存电力等。对于由作为基本单元的电声换能器构成的超声波阵列换能器提供的信号接收的灵敏度，由于机电转换效率的漂移，主光束的灵敏度不但会发生漂移，导致声S / N比的恶化，超声波束的方向性劣化。为了解决这些问题，提供了一种电声换能器装置，其包括在基板之上或之内形成的第一电极，使用硅或硅化合物作为其基材的薄膜，其设置在基板，形成在薄膜的上面或内部的第二电极，设置在第一电极和第二电极之间的空隙层，用于存储由第一电极和第二电极给出的电荷的电荷存储层，第一电极和第二电极以及源电极和漏电极，用于测量存储在电荷存储层中的电量。

3. 发明授权

US08132462B2 Ultrasonographic device 有权
标题翻译：超声波装置
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。

4. 发明申请

US20090301199A1 ULTRASONOGRAPHIC DEVICE 有权
标题翻译：超声波设备
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。

5. 发明授权

US07817811B2 Sound-electricity conversion device, array-type ultrasonic transducer, and ultrasonic diagnostic apparatus 有权
标题翻译：声电转换装置，阵列式超声波换能器和超声波诊断装置
公开(公告)号：US07817811B2
公开(公告)日：2010-10-19
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： H04R25/00
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。

6. 发明申请

US20060284519A1 Sound-electricity conversion device, array-type ultrasonic transducer, and ultrasonic diagnostic apparatus 有权
标题翻译：声电转换装置，阵列式超声波换能器和超声波诊断装置
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。

7. 发明授权

US08323197B2 Blood flow measuring and evaluating apparatus 有权
标题翻译：血流量测仪器
公开(公告)号：US08323197B2
公开(公告)日：2012-12-04
申请号：US12039344
申请日：2008-02-28
申请人： Miyuki Kono , Takashi Azuma , Shin-ichiro Umemura , Hiroki Tanaka
发明人： Miyuki Kono , Takashi Azuma , Shin-ichiro Umemura , Hiroki Tanaka
IPC分类号： A61B8/00
CPC分类号： A61B8/06 , A61B8/4472
摘要： Means for measuring and evaluating a dynamic property of a blood flow in a superficial blood vessel of a living body are constructed.A physical stimulus is given to the blood flow, and an ultrasonic response from the blood flow to the physical stimulus is measured and evaluated, which allows the blood property to be evaluated noninvasively and dynamically. Therefore, a medical check and a lifestyle-related diseases prevention effect are promising.
摘要翻译：构建用于测量和评价生物体的浅表血管中的血液流动性的手段。对血流进行物理刺激，并测量和评估从血流到物理刺激的超声波响应，从而可以非侵入性地和动态地评估血液性质。因此，医疗检查和与生活方式有关的疾病预防效果是有希望的。

8. 发明授权

US07942821B2 Doppler velocity detection device and ultrasonographic device using the same 失效
标题翻译：多普勒速度检测装置及其使用的超声波装置
公开(公告)号：US07942821B2
公开(公告)日：2011-05-17
申请号：US10580225
申请日：2004-07-09
申请人： Shin-ichiro Umemura , Takashi Azuma , Tetsuya Hayashi
发明人： Shin-ichiro Umemura , Takashi Azuma , Tetsuya Hayashi
IPC分类号： A61B8/00
CPC分类号： G01S15/8981 , G01S15/8977
摘要： The present invention realizes a Doppler velocity detecting technique capable of performing velocity detection and analysis with a suppressed error while excellently distinguishing a clutter signal, and provides an ultrasonographic device using the technique. In a Doppler velocity detection device comprising means for transmitting/receiving pulse waves to/from a subject a plurality of times, and velocity analyzing means for analyzing a velocity of a moving reflector in the subject on the basis of a reception echo signal, the velocity analyzing means obtains a complex expansion coefficient by linearly connecting an expansion coefficient of an even-numbered degree term and an expansion coefficient of an odd-numbered degree term which is different from the even-numbered degree term by one degree, derived when reception echo time-series signals obtained by arranging reception echo signals of equal lapse time from pulse transmission times in order of the transmission times are expanded as components of a Legendre polynomial starting from the 0th degree, by using an imaginary unit as a coefficient, and obtains a signed velocity signal of a moving reflector in the subject on the basis of-the ratio between the magnitude of each complex expansion coefficient and the magnitude of an interval between the complex expansion coefficients.
摘要翻译：本发明实现了一种多普勒速度检测技术，其能够在抑制误差的同时进行速度检测和分析，同时优异地区分杂波信号，并提供使用该技术的超声波装置。在多普勒速度检测装置中，包括用于多次向对象发送/接收脉搏波的装置，以及速度分析装置，用于根据接收回波信号分析被检体内的移动反射器的速度，速度分析装置通过将偶数度项的展开系数和与偶数度项不同的奇数项的展开系数线性连接一度获得复数展开系数，当接收回波时间通过使用虚数单位作为系数，将从发送时间的顺序的脉冲发送时间的等待通过时间的接收回波信号作为从第0度开始的勒让德多项式的分量扩展得到的系列信号，基于每个复合扩张系数的大小之间的比例，对象中的移动反射器的速度信号有效率和复合扩张系数间隔的大小。

9. 发明申请

US20080228076A1 Ultrasonic Imaging Device 有权
标题翻译：超声波成像装置
公开(公告)号：US20080228076A1
公开(公告)日：2008-09-18
申请号：US10586665
申请日：2005-01-06
申请人： Takashi Azuma , Shin-ichiro Umemura , Hiroshi Kuribara , Tatsuya Hayashi
发明人： Takashi Azuma , Shin-ichiro Umemura , Hiroshi Kuribara , Tatsuya Hayashi
IPC分类号： A61B8/14
CPC分类号： G01S15/102 , A61B8/481 , G01S7/5202 , G01S7/52038 , G01S7/52039 , G01S15/8959 , G01S15/8963
摘要： This invention provides an ultrasonic imaging system that implements imaging by distinguishing sharply and definitely the echo components generated by scattering in a microbubble contrast medium, from the tissue harmonic components generated by nonlinear propagation of a transmitted pulse. This ultrasonic imaging system, constructed to transmit/receive ultrasonic pulses to/from a living body and form a contrast image of the inside of the living body by using the contrast-imaging microbubbles, repeats the transmitting/receiving operations four times in all, under the same transmitting/receiving focus conditions at different phase angles [(a)=0°, (b)=120°, (c)=−120°, (d)=180°] of the carrier of a transmitted pulse wave including a common envelope signal, sums up three time-series receive echo signals associated with (a), (b), (c), forms the contrast image, sums up two time-series receive echo signals associated with (a), (d), forms an image of the living body having a nonlinear pulse propagation property, and makes a superimposed display of the two kinds of images.
摘要翻译：本发明提供了一种超声成像系统，其通过从由发射脉冲的非线性传播产生的组织谐波分量中清楚地和明确地区分由微泡造影剂中的散射产生的回波分量来实现成像。该超声波成像系统被构造成通过使用对比度成像微泡将生物体的超声波脉冲发送/接收生物体内部的对比图像，全部重复发送/接收操作四次发射脉冲波的载波的不同相位角[（a）= 0°，（b）= 120°，（c）= - 120°，（d）= 180°）的相同发射/接收对焦条件包括共同的包络信号，与（a），（b），（c）相关联的三个时间序列接收回波信号相加形成对比度图像，将与（a），（d）相关联的两个时间序列接收回波信号相加），形成具有非线性脉冲传播特性的活体的图像，并且叠加显示两种图像。

10. 发明申请

US20070293764A1 Ultrasonograph 审中-公开
标题翻译：超声波检查
公开(公告)号：US20070293764A1
公开(公告)日：2007-12-20
申请号：US11882930
申请日：2007-08-07
申请人： Shin-ichiro Umemura , Yuichi Miwa , Takashi Azuma , Takashi Sugiyama , Hiroshi Kuribara
发明人： Shin-ichiro Umemura , Yuichi Miwa , Takashi Azuma , Takashi Sugiyama , Hiroshi Kuribara
IPC分类号： A61B8/00
CPC分类号： G01S7/52047 , A61B8/481 , G01S7/5202 , G01S7/52026 , G01S7/52038 , G01S15/8963 , G10K11/346
摘要： To provide an ultrasonograph capable of generating a transmission beam comprising a main beam having a uniform width over a wide range in an ultrasonic wave propagation direction by one-time transmission of an ultrasonic pulse. A weighted mean value of a plurality of transmission delay time values corresponding to focal lengths of transmission pulse waves having a plurality of focal points which are set in the ultrasonic wave propagation direction is calculated for each of elements constituting a transmission aperture and used as the delay time. Waves are actually transmitted with the weighted mean value as delay time. As the weight used for obtaining the delay time mean value, first, a transmission effective aperture width according to each transmission focal length is selected, and a weight in the direction of the transmit aperture realizing the width is calculated and is used in a focal length direction. As a result, the curvature of a wave front of a wave transmitted is close to that of the wave front of a short focal length in the center portion of the transmit aperture, and is close to that of the wave front of a long focal length in the peripheral portion. Consequently, a non-cylindrical wave front is formed. Thus, a transmission beam including a relatively narrow main beam with a uniform width over a wide range in the ultrasonic wave propagation direction can be generated by one-time transmission of an ultrasonic pulse.
摘要翻译：提供能够通过超声波脉冲的一次传输，在超声波传播方向上产生包括宽范围宽的宽波长的发射束的超声波检查仪。针对构成传输孔径的每个元素计算与设置在超声波传播方向上的多个焦点的传输脉冲波的焦距相对应的多个传输延迟时间值的加权平均值，并将其用作延迟时间。波实际上以加权平均值作为延迟时间发送。作为用于获得延迟时间平均值的权重，首先，选择根据每个传输焦距的传输有效孔径宽度，并且计算实现宽度的发射孔径的方向上的权重，并将其用于焦距方向。结果，传输的波的波前的曲率接近发射孔的中心部分的短焦距的波前的曲率，并且接近于长焦距的波前的曲率在周边部分。因此，形成非圆柱形波前。因此，通过超声脉冲的一次发送，可以生成包括在超声波传播方向上的宽范围内具有均匀宽度的相对窄的主波束的发送波束。

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