公开(公告)号：US4321886A

公开(公告)日：1982-03-30

申请号：US177431

申请日：1980-08-12

申请人： Takashi Azuma

发明人： Takashi Azuma

IPC分类号： G01N27/72 ,  G03G15/08 ,  G03G15/09

CPC分类号： G03G15/0853

摘要： An apparatus for controlling toner concentration utilizing a hollow body upon which a detecting coil is wound. The hollow body responses to the inductance of the developer passing through. The apparatus further comprises: a first digital oscillator with the frequency thereof being variable according to changes in the inductance, a second digital oscillator producing a reference signal at predetermined frequency, and a first and second digital frequency dividers for dividing the outputs of the first and second oscillators, respectively. The fist and second dividers are cleared by the divided output of the other divider. A toner supply mechanism is energized when the first frequency divider is cleared and is de-energized when the second frequency divider is cleared.

摘要翻译： 一种利用卷绕有检测线圈的中空体来控制调色剂浓度的装置。 中空体响应于通过的显影剂的电感。 该装置还包括：第一数字振荡器，其频率根据电感的变化而变化，产生预定频率的参考信号的第二数字振荡器，以及用于分割第一和第二数字分频器的输出的第一和第二数字分频器 第二振荡器。 第一和第二分频器被另一个分频器的分频输出清零。 当第一个分频器清零时，调色剂供应机构通电，并在第二个分频器清零时断电。

公开(公告)号：US08535229B2

公开(公告)日：2013-09-17

申请号：US11719770

申请日：2005-07-15

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

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

IPC分类号： A61B8/00

CPC分类号： G01S15/8993 ,  A61B8/483 ,  G01S7/5202 ,  G01S7/52046 ,  G01S7/5209 ,  G01S7/52095

摘要： 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.

摘要翻译： 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：US20130109968A1

公开(公告)日：2013-05-02

申请号：US13808255

申请日：2011-07-15

申请人： Takashi Azuma

发明人： Takashi Azuma

IPC分类号： A61B8/14 ,  A61B8/08 ,  A61B8/06 ,  A61B8/00

CPC分类号： A61B8/145 ,  A61B8/06 ,  A61B8/461 ,  A61B8/488 ,  A61B8/5207 ,  A61B8/5269 ,  A61B8/54 ,  G01S7/52046 ,  G01S7/52077 ,  G01S15/8961 ,  G01S15/8979

摘要： Disclosed is an ultrasonic imaging device having an improved signal-to-noise ratio. After A/D conversion, by performing filtering between channels or two-dimensional filtering between channels and along the time axis, reduction in spatial resolution is suppressed as much as possible to thereby improve the signal-to-noise ratio.

摘要翻译： 公开了一种具有改善的信噪比的超声波成像装置。 在A / D转换之后，通过在信道之间进行滤波或者沿时间轴进行二维滤波，尽可能地抑制空间分辨率的降低，从而提高信噪比。

公开(公告)号：US08388536B2

公开(公告)日：2013-03-05

申请号：US12545975

申请日：2009-08-24

申请人： Takashi Azuma ,  Shinichiro Umemura

发明人： Takashi Azuma ,  Shinichiro Umemura

IPC分类号： A61B8/00

CPC分类号： G01S15/8954 ,  G01S7/52022 ,  G01S7/52046 ,  G01S15/104 ,  G01S15/8959 ,  G01S15/8961

摘要： In an ultrasonic contrast imaging method in which signals specific to a contrast agent are extracted to form an image, imaging is performed with the following three well-balanced properties: frame rate, spatial resolution, and contrast-agent selectivity. A first chirp signal whose frequency increases with time and a second chirp signal obtained by inverting the first chirp signal about the time axis are used, and they are individually transmitted and received. A decoder having decode filters each adapted for a coded sequence, which is obtained when the chirp signal is decomposed into a pulse signal and a coded sequence, is provided. The decode filters are adapted for echo signals received in response to two chirp signals, respectively, and outputs of the two decode filters are input to a subtractor, whereby the difference therebetween is determined. Thus, contrast-agent selectivity is balanced with spatial resolution.

摘要翻译： 在提取特定于造影剂的信号以形成图像的超声波对比度成像方法中，使用以下三个良好平衡的特性进行成像：帧速率，空间分辨率和造影剂选择性。 使用其频率随时间增加的第一啁啾信号和通过使关于时间轴的第一啁啾信号反相而获得的第二啁啾信号，并且它们被单独发送和接收。 一种具有解码滤波器的解码器，每个解码滤波器适用于当线性调频信号被分解为脉冲信号和编码序列时获得的编码序列。 解码滤波器适用于响应于两个啁啾信号而接收的回波信号，并且两个解码滤波器的输出被输入到减法器，从而确定它们之间的差异。 因此，造影剂选择性与空间分辨率平衡。

公开(公告)号：US20120038242A1

公开(公告)日：2012-02-16

申请号：US13265455

申请日：2010-04-19

申请人： Hiroki Tanaka ,  Takashi Azuma

发明人： Hiroki Tanaka ,  Takashi Azuma

IPC分类号： H02N1/00

CPC分类号： G10K9/121 ,  A61B8/4281 ,  A61B8/485 ,  B06B1/0292

摘要： Artifacts due to lateral wave that occurs in a substrate of a Capacitive Micro-machined Ultrasonic Transducer is reduced. The substrate thickness of the ultrasonic transducer is set in an optimum range to efficiently radiate the energy of lateral wave in the sensitive band 91 of the ultrasonic transducer to the outside so that the lateral wave is attenuated thereby reducing the artifacts in ultrasonic imaging.

摘要翻译： 由于在电容式微加工超声波传感器的基板中发生的横向波而产生的人造物减少。 将超声波换能器的基板厚度设定在最佳范围内，以有效地将超声波换能器的敏感频带91内的横波的能量照射到外部，使得横波衰减，从而减少超声波成像中的伪影。

公开(公告)号：US08079956B2

公开(公告)日：2011-12-20

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： A61B8/00

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：US20110218439A1

公开(公告)日：2011-09-08

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

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：US08002703B2

公开(公告)日：2011-08-23

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： A61B8/00

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。

公开(公告)号：US20100280376A1

公开(公告)日：2010-11-04

申请号：US12810327

申请日：2008-08-28

申请人： Shinichiro Umemura ,  Takashi Azuma

发明人： Shinichiro Umemura ,  Takashi Azuma

IPC分类号： A61B8/14

CPC分类号： A61B8/481

摘要： An echo signal reflected from a microbubble contrast agent is discriminated from an echo signal generated upon reflection of a nonlinearly propagated transmission pulse from the body tissues without degradation of the axial resolution, by performing transmission/reception twice or less which would hardly decrease the imaging speed. By detecting a difference in phase of the second harmonic component based on the fundamental component included in the echo signal, an echo signal generated upon nonlinear reflection from a microbubble contrast agent is discriminated from an echo signal generated upon linear reflection of a nonlinearly propagated transmission pulse from the body tissues. The phase of the second harmonic component is detected through phase sensitive detection in which the square of the fundamental component is used as a reference wave. Concurrently, a pulse inversion method is used to extract the second harmonic component included in the original echo signal, whereby degradation of the axial resolution is prevented.

摘要翻译： 从微泡造影剂反射的回波信号与通过非线性传播的来自身体组织的传播脉冲反射而产生的回波信号进行区分，而不会降低轴向分辨率，通过执行两次或更少的几乎不降低成像速度的发送/接收 。 通过基于包含在回波信号中的基波分量来检测二次谐波分量的相位差，从微泡造影剂的非线性反射产生的回波信号与在非线性传播的传输脉冲的线性反射时产生的回波信号 从身体组织。 通过使用基波分量的平方作为基准波的相位检测来检测二次谐波分量的相位。 同时，使用脉冲反转方法来提取包括在原始回波信号中的二次谐波分量，由此防止轴向分辨率的劣化。

公开(公告)号：US07785260B2

公开(公告)日：2010-08-31

申请号：US10482789

申请日：2002-06-05

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： 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. The curvature of a transmitted wave front is close to a short focal length in the center portion of the transmit aperture and is close to a long focal length in the peripheral portion. 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.

摘要翻译： 一种能够通过超声波脉冲的一次发送，能够在超声波传播方向上产生宽波长宽泛的主波束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。 透射波前的曲率在发射孔的中心部分接近短焦距，并且在周边部分中接近长焦距。 因此，可以产生包括在超声波传播方向上在宽范围内具有均匀宽度的相对窄的主波束的发射波束。