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51. 发明授权

US4641260A Digital signal processing apparatus for a blood flowmeter using ultrasound Doppler effect 失效
标题翻译：用于使用超声多普勒效应的血液流量计的数字信号处理装置
公开(公告)号：US4641260A
公开(公告)日：1987-02-03
申请号：US558274
申请日：1983-12-05
申请人： Hiroshi Fukukita , Ryobun Tachita , Kuniaki Fukaya , Tsutomu Yano
发明人： Hiroshi Fukukita , Ryobun Tachita , Kuniaki Fukaya , Tsutomu Yano
IPC分类号： A61B8/00 , A61B8/06 , G01S15/58 , G06F17/14 , G06F11/00 , G06F7/34 , G06F15/42
CPC分类号： A61B8/06 , G01S15/582
摘要： A digital signal processing apparatus is shown which is applicable for real time operation in the power spectrum of the detected outputs of ultrasonic Doppler blood flowmeter. The apparatus comprises a digital operating means, a memory means which is connected to said digital operating means to transfer data thereto and receive data therefrom, a fixed instruction generating portion for generating operating code for the digital operating means and addresses for the memory means, a read only memory for storing data of a squaring operation which has address inputs at the bit position selected as most suitable from the input data bus line of said digital operating means, an overflow detecting means when input data exceeds the region of the address input, and digital saturation circuit, whereby the power spectrum can be calculated by fundamental algorithm of WFTA having a smaller number of operating steps than algorithm FFT.
摘要翻译：示出了可用于超声波多普勒血流计检测输出的功率谱中的实时操作的数字信号处理装置。该装置包括数字操作装置，连接到所述数字操作装置以向其传送数据并从其接收数据的存储装置，用于产生数字操作装置的操作码和用于存储装置的地址的固定指令产生部分，只读存储器，用于存储在从所述数字操作装置的输入数据总线最适合选择的位位置处具有地址输入的平方运算的数据;溢出检测装置，当输入数据超过地址输入的区域时，以及数字饱和电路，从而可以通过具有比算法FFT更少的操作步骤的WFTA的基本算法来计算功率谱。

52. 发明授权

US4470308A Arc scan ultrasonic imaging system having diverging lens and path-length compensator 失效
标题翻译：具有发散透镜和路径长度补偿器的电弧扫描超声成像系统
公开(公告)号：US4470308A
公开(公告)日：1984-09-11
申请号：US404917
申请日：1982-08-03
申请人： Yoshihiro Hayakawa , Tsutomu Yano , Ryobun Tachita , Hiroshi Fukukita , Kazuyoshi Irioka , Akira Fukumoto
发明人： Yoshihiro Hayakawa , Tsutomu Yano , Ryobun Tachita , Hiroshi Fukukita , Kazuyoshi Irioka , Akira Fukumoto
IPC分类号： H04R17/00 , A61B8/00 , A61B8/14 , B06B1/06 , G01S7/521 , G01S7/523 , G01S15/89 , G10K11/02 , G10K11/30 , G10K11/32 , G10K11/34 , G01N29/00
CPC分类号： G01S15/892 , B06B1/0633 , G10K11/02 , G10K11/32
摘要： An ultrasonic imaging system comprises a transducer array including a plurality of elongated piezoelectric transducers successively arranged along a curved surface for emission of diverging beams of acoustic energy and an acoustic diverging lens affixed to the curved surface for increasing the angle of divergence of the emitted acoustic energy. The system includes a source for successively generating burst energy and means for selectively establishing a connection from the energy source to a subarray of the transducers to transmit a beam of acoustic energy therefrom and shifting the connection to the next subarray by at least one transducer in response to the generation of subsequent acoustic energy to cause the emitted acoustic energy to be angulated in an arc scan format. Means are provided for compensating for differences in energy level resulting from the differences in the path-length of the acoustic lens.
摘要翻译：超声波成像系统包括换能器阵列，其包括沿着弯曲表面连续布置的多个细长的压电换能器，用于发射发散的声能束，以及固定到弯曲表面的声发散透镜，用于增加发射的声能的发散角。该系统包括用于连续产生突发能量的源和用于选择性地建立从能量源到换能器的子阵列的连接的装置，以从其传输声能束，并响应于至少一个换能器将连接移动到下一个子阵列以产生随后的声能以使发射的声能以弧扫描格式成角度。提供了用于补偿由声透镜的路径长度差异引起的能量差异的装置。

53. 发明授权

US4368643A Ultrasonic imaging by radial scan beams emanating from a hypothetical point located behind linear transducer array 失效
标题翻译：通过径向扫描光束从位于线性换能器阵列后面的假想点发出的超声波成像
公开(公告)号：US4368643A
公开(公告)日：1983-01-18
申请号：US206828
申请日：1980-11-14
申请人： Ryobun Tachita , Hiroshi Fukukita , Yoshihiro Hayakawa , Kazuyoshi Irioka
发明人： Ryobun Tachita , Hiroshi Fukukita , Yoshihiro Hayakawa , Kazuyoshi Irioka
IPC分类号： A61B8/00 , G01N29/24 , G01S7/52 , G10K11/34 , G01N29/00
CPC分类号： G10K11/345 , G01S15/8927 , G01S7/52063 , G01S7/52085
摘要： An ultrasonic imaging system includes a linear array of transducers of which a group of successively arranged transducers is selected and successively shifted to the next by at least one transducer. The transducers of the selected group are successively activated at respective delay times to transmit a radial scan beam which appears to emanate from a hypothetical point source located behind the transducer array. A scan converter is provided for conversion of analog echo signals in sector scan format to digital echo data in raster format for visual display.
摘要翻译：超声波成像系统包括换能器的线性阵列，其中一组连续布置的换能器被选择并由至少一个换能器连续地移动到下一个换能器。所选择的组的换能器在相应的延迟时间连续地被激活，以发射似乎从位于换能器阵列后面的假想点源发出的径向扫描光束。提供了一种扫描转换器，用于将扇区扫描格式的模拟回波信号转换为光栅格式的数字回波数据，以进行视觉显示。

54. 发明授权

US4310907A Scan converter for a sector scan type ultrasound imaging system 失效
标题翻译：扫描转换器用于扇区扫描型超声成像系统
公开(公告)号：US4310907A
公开(公告)日：1982-01-12
申请号：US100707
申请日：1979-12-04
申请人： Ryobun Tachita , Yoshihiro Hayakawa , Hiroshi Fukukita , Tsutomu Yano , Kazuyoshi Irioka , Akira Fukumoto
发明人： Ryobun Tachita , Yoshihiro Hayakawa , Hiroshi Fukukita , Tsutomu Yano , Kazuyoshi Irioka , Akira Fukumoto
IPC分类号： A61B8/00 , A61B8/14 , G01S7/531 , G01S15/89
CPC分类号： G01S7/52044
摘要： A scan converter is disclosed for use in a sector scan type ultrasound imaging system in which ultrasound echo signals return from targets along a plurality of radial scan lines distributed in a sector field with a substantially equal tangential angular increment with respect to a reference line. The scan converter comprises a sampling circuit which samples the echo signals at a speed inversely proportional to the cosine of the angle of deflection of the radial scan lines with respect to the reference line so that the sampled points align themselves in lateral lines perpendicular to the reference line. The sampled echo signals are converted into digital echo data and stored in a random access memory in the direction of its columns. The stored data are retrieved serially in the direction of the rows and fed into an interpolator for making interpolations between the successively retrieved echo data. The interpolation data are read into a line memory in succession with the data retrieved from the RAM during each raster scan interval, and then retrieved at a constant rate from preselected storage locations so that the data on the raster scan lines have approximately equal density. The retrieved data from the line memory are converted in analog signals and displayed on a viewing screen.
摘要翻译：公开了一种用于扇区扫描型超声成像系统的扫描转换器，其中超声回波信号沿着分布在扇区中的多个径向扫描线从目标返回，其具有相对于参考线的基本相等的切角增量。扫描转换器包括采样电路，该采样电路以与扫描线相对于参考线的偏转角的余弦成反比的速度对回波信号进行采样，使得采样点在与参考线垂直的横向线上对齐线。采样的回波信号被转换成数字回波数据，并在其列的方向上存储在随机存取存储器中。存储的数据在行的方向上被串行检索，并被馈送到用于在连续检索的回波数据之间进行内插的内插器。插补数据在每个光栅扫描间隔期间从RAM中检索的数据连续读入行存储器，然后以预定的存储位置以恒定速率检索，使得光栅扫描线上的数据具有大致相等的密度。来自行存储器的检索数据被转换为模拟信号并显示在观看屏幕上。

55. 发明授权

US4287768A Beam deflection method and apparatus for sector scan ultrasound imaging systems 失效
标题翻译：用于扇形扫描超声成像系统的光束偏转方法和装置
公开(公告)号：US4287768A
公开(公告)日：1981-09-08
申请号：US93019
申请日：1979-11-09
申请人： Yoshihiro Hayakawa , Hiroshi Fukukita
发明人： Yoshihiro Hayakawa , Hiroshi Fukukita
IPC分类号： G01N29/26 , G01S7/52 , G01N29/00
CPC分类号： G01N29/262 , G01S7/52063
摘要： Beam deflection delay time data of (L.times.M) data bits are stored in a read-only memory from which each datum is retrieved successively when the ultrasound beam is deflected to a given angle and repeatedly accumulated in a digital adder through a latching circuit connected between the output and input of the adder, where L is the number of discrete steps of deflection angle and M is a binary number representing the total delay time of piezoelectric transducers. The successively latched data is distributed to respective programmable counters for presetting the count values thereof to store therein respective delay time data. High frequency count pulses are supplied to the counters after the latter has been preset for delivery of carry outputs to the associated piezoelectric transducers. Beam convergence delay time data is also stored in a second memory from which each datum is retrieved for each transducer element and accumulated so that a tapered configuration of binary differential numbers is created and added to the beam deflection delay time data for converging the ultrasound beam.
摘要翻译：（LxM）数据位的光束偏转延迟时间数据存储在只读存储器中，当超声波束偏转到给定的角度并连续地在数字加法器中重复累积时，连续检索每个数据，输出和输入，其中L是偏转角的离散步长数，M是表示压电换能器的总延迟时间的二进制数。相继锁存的数据被分配到相应的可编程计数器，用于预置它们的计数值，以在其中存储相应的延迟时间数据。高速计数脉冲在预先设定为递送输出到相关的压电换能器之后被提供给计数器。光束会聚延迟时间数据也被存储在第二存储器中，从每个传感器元件检索每个数据并累积，从而产生二进制差分数的锥形配置并将其相加到用于会聚超声波束的光束偏转延迟时间数据。

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