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1. 发明授权

US08277380B2 Piezoelectric and CMUT layered ultrasound transducer array 有权
标题翻译：压电和CMUT分层超声换能器阵列
公开(公告)号：US08277380B2
公开(公告)日：2012-10-02
申请号：US11900561
申请日：2007-09-11
申请人： Christopher M. W. Daft , Paul A. Wagner , Xuanming Lu
发明人： Christopher M. W. Daft , Paul A. Wagner , Xuanming Lu
IPC分类号： A61B8/14
CPC分类号： B06B1/0292 , B06B1/064 , G01S7/5208
摘要： A CMUT or other semiconductor-based transducer is stacked with a piezoelectric transducer (PZT). The CMUT is sufficiently thin to avoid or limit interference with sound propagation through the CMUT from or to the PZT or crosstalk between transmitter elements. The PZT/CMUT layered structure is used as a matrix array, such as an array with a multi-dimensional arrangement of elements. The CMUT array is formed and thinned using semiconductor processing. The PZT transmits acoustic energy through the thin CMUT. The CMUT receives responsive echoes. Using integrated electronics in the thin wafer of the CMUT limits interconnection problems for the matrix receive array.
摘要翻译： CMUT或其他基于半导体的传感器与压电换能器（PZT）堆叠。 CMUT足够薄以避免或限制通过CMUT从PZT或发射器元件之间的串扰传播通过CMUT的干扰。 PZT / CMUT分层结构用作矩阵阵列，例如具有多维排列元素的阵列。使用半导体处理形成和减薄CMUT阵列。 PZT通过薄CMUT传输声能。 CMUT接收响应回波。在CMUT的薄晶片中使用集成电子元件限制了矩阵接收阵列的互连问题。

2. 发明授权

US07006955B2 System and method for statistical design of ultrasound probe and imaging system 失效
公开(公告)号：US07006955B2
公开(公告)日：2006-02-28
申请号：US09976582
申请日：2001-10-15
申请人： Christopher M. W. Daft , William Macomber Leue
发明人： Christopher M. W. Daft , William Macomber Leue
IPC分类号： G06F7/48
CPC分类号： G01N29/44 , G01N29/06 , G01N29/4454 , G01S7/52046
摘要： A system and method for statistical design of an ultrasound probe and imager system, and an associated graphical user interface for selecting input parameters to be used in an ultrasound simulation. The process and computer code allow the performance of a probe and imager combination to be specified and jointly optimized in image quality terms. The designs produced optimize both the image quality and other CTQ (critical to quality) parameters, such as the distribution of regulatory power indices and mechanical index. These CTQs indirectly affect image quality through their effect on patient dose. The Transducer Design Advisor incorporates a graphical user interface for facilitating selection of a parameter set to be used in the simulation. The user selects a desired parameter set by navigating across and interacting with a succession of windows. The user specifies various geometric characteristics of the transducer and how the user wants to simulate the imager system. Finally, the user specifies weights for the various CTQs at different depths. Based on these inputs, the Transducer Design Advisor creates the files needed by the ultrasound simulator.

3. 发明授权

US5345939A Ultrasound imaging system with dynamic window function 失效
标题翻译：超声成像系统具有动态窗口功能
公开(公告)号：US5345939A
公开(公告)日：1994-09-13
申请号：US157760
申请日：1993-11-24
申请人： William E. Engeler , Christopher M. W. Daft , John T. Pedicone , Theodore L. Rhyne
发明人： William E. Engeler , Christopher M. W. Daft , John T. Pedicone , Theodore L. Rhyne
IPC分类号： G01B17/06 , G01S7/52 , G01S15/89 , G10K11/34 , A61B8/00
CPC分类号： G10K11/348 , G01B17/06 , G01S15/8918 , G01S7/52047
摘要： A PASS ultrasonic system includes a separate receive channel for each respective element in an ultrasonic transducer array which imparts a delay to the echo signal produced by each respective element. The delayed echo signals are summed to form a steered, dynamically focused and dynamically windowed receive beam which can be readily interpreted even when the transmit beam does not emanate from the center of the array.
摘要翻译： PASS超声波系统包括用于超声换能器阵列中的每个相应元件的单独的接收通道，其对由每个相应元件产生的回波信号施加延迟。延迟的回波信号被相加以形成转向的动态聚焦和动态窗口的接收波束，即使当发射波束不从阵列的中心发射时，其也可以容易地解释。

4. 发明授权

US5488588A Ultrasonic imager having wide-bandwidth dynamic focusing 失效
标题翻译：超声波成像仪具有宽带宽动态聚焦
公开(公告)号：US5488588A
公开(公告)日：1996-01-30
申请号：US301751
申请日：1994-09-07
申请人： William E. Engeler , Christopher M. W. Daft
发明人： William E. Engeler , Christopher M. W. Daft
IPC分类号： G01S7/52 , G01S15/89 , G10K11/34 , G03B42/06
CPC分类号： G01S15/8918 , G01S7/52026 , G10K11/345
摘要： An ultrasonic imaging system provides dynamic focusing by using dynamic group delay in addition to dynamic phase focus. FIFO memory storage capacity in the beamforming circuit is increased to provide improved resolution of the data samples stored therein. These samples are selected by an address counter in response to both the advance of time and the accumulation of a phase advance clock count. After a Read Start signal, indicating the start of a beam, is supplied to the FIFO memory, the FIFO memory address is advanced, on each read instruction, by the number of address locations corresponding to the period of a pipeline channel. In addition, the address is incremented whenever the accumulated count of a phase advance clock exceeds an amount corresponding to the smallest increment of the data stored in the FIFO memory.
摘要翻译：超声波成像系统通过使用动态相位聚焦以外的动态群延迟来提供动态聚焦。增加波束成形电路中的FIFO存储器存储容量以提供其中存储的数据样本的改进的分辨率。响应于时间的提前和相位提前时钟计数的累积，地址计数器选择这些采样。在指示光束起始的读取开始信号被提供给FIFO存储器之后，FIFO存储器地址在每个读取指令上被提前与管道通道的周期相对应的地址位置的数量。此外，每当相位超前时钟的累计计数超过与存储在FIFO存储器中的数据的最小增量相对应的量时，地址将递增。

5. 发明授权

US07670290B2 Electric circuit for tuning a capacitive electrostatic transducer 有权
标题翻译：用于调谐电容式静电传感器的电路
公开(公告)号：US07670290B2
公开(公告)日：2010-03-02
申请号：US10803808
申请日：2004-03-17
申请人： John A. Hossack , Brett Bymaster , Igal Ladabaum , Paul A. Wagner , Christopher M. W. Daft
发明人： John A. Hossack , Brett Bymaster , Igal Ladabaum , Paul A. Wagner , Christopher M. W. Daft
IPC分类号： A61B8/00
CPC分类号： B06B1/0292 , A61B8/4483 , G01S7/52079
摘要： An electrostatic transducer circuit and method of tuning the same, in which a balancing circuit is inserted into the electrostatic transducer circuit, is described. The electrostatic transducer circuit generally includes transmit circuitry, receive circuitry, a capacitive electrostatic transducer and the balancing circuit. The balancing circuit can include, either singly or in combination, an inductance and a negative capacitance. The balancing inductance is tuned to counteract the negative reactance of the capacitive electrostatic transducer at a desired operating frequency and can be inserted into the transmit circuitry and/or the receive circuitry. The balancing negative capacitance is tuned to counteract the capacitance of the capacitive electrostatic transducer and can be inserted into the receive circuitry and/or the transmit circuitry. The transmit circuitry can be isolated from the receive circuitry, and vice versa, once the balancing circuit has been inserted. Isolation can be achieved by switching the electrostatic transducer circuit between transmit and receive modes of operation, or by providing separate transmit and receive electrode subsets.
摘要翻译：描述了一种静电换能器电路及其调谐方法，其中平衡电路插入到静电换能器电路中。静电换能器电路通常包括发射电路，接收电路，电容式静电变换器和平衡电路。平衡电路可以单独地或组合地包括电感和负电容。调整平衡电感以抵消在期望的工作频率下的电容式静电换能器的负电抗并且可以插入到发射电路和/或接收电路中。调整平衡负电容以抵消电容式静电变换器的电容，并可将其插入接收电路和/或发射电路。一旦平衡电路被插入，发射电路可以与接收电路隔离，反之亦然。可以通过在发射和接收工作模式之间切换静电转换器电路，或通过提供单独的发射和接收电极子集来实现隔离。

6. 发明授权

US5445156A Method for adaptively filtering doppler signals using a complex time domain filter 失效
标题翻译：使用复杂时域滤波器自适应滤波多普勒信号的方法
公开(公告)号：US5445156A
公开(公告)日：1995-08-29
申请号：US333184
申请日：1994-11-02
申请人： Christopher M. W. Daft , Anne L. Hall , Sharbel E. Noujaim , Lewis J. Thomas , Kenneth B. Welles, II
发明人： Christopher M. W. Daft , Anne L. Hall , Sharbel E. Noujaim , Lewis J. Thomas , Kenneth B. Welles, II
IPC分类号： G01S7/52 , G01S15/89 , A61B8/00
CPC分类号： G01S7/52071 , G01S15/8979 , G01S7/52026 , G01S7/52033
摘要： A time domain technique for implementing an adaptive wall filter improves imaging of low-velocity blood flow by removing signals associated with slowly moving tissue. Adaptive wall filtering is performed by estimating wall velocity and bandwidth, and then filtering the basebanded data with a complex time domain notch filter. The wall velocity estimate determines the center frequency of a wall signal while the wall variance estimate determines the wall signal bandwidth. The complex filter coefficients selected are those which will center the complex notch filter on the wall center frequency, and which will set the filter cutoff frequencies (measured from this center frequency) to match the wall signal bandwidth.
摘要翻译：用于实现自适应壁滤器的时域技术通过去除与缓慢移动的组织相关的信号来改善低速血流的成像。通过估计墙体速度和带宽进行自适应壁面滤波，然后用复杂时域陷波滤波器对基带数据进行滤波。墙壁速度估计确定墙壁信号的中心频率，而墙壁方差估计确定壁信号带宽。选择的复杂滤波器系数是将复杂陷波滤波器置于壁中心频率上的复数滤波器系数，并且将设置滤波器截止频率（从该中心频率测量）以匹配壁信号带宽。

7. 发明授权

US5349524A Color flow imaging system utilizing a time domain adaptive wall filter 失效
标题翻译：彩色流量成像系统利用时域自适应墙壁滤波器
公开(公告)号：US5349524A
公开(公告)日：1994-09-20
申请号：US1998
申请日：1993-01-08
申请人： Christopher M. W. Daft , Anne L. Hall , Sharbel E. Noujaim , Lewis J. Thomas , Kenneth B. Welles, II
发明人： Christopher M. W. Daft , Anne L. Hall , Sharbel E. Noujaim , Lewis J. Thomas , Kenneth B. Welles, II
IPC分类号： G01S7/52 , G01S15/52 , G01S15/58 , G01S15/89 , G01F1/66 , A61B8/00 , G06F15/66
CPC分类号： G01S7/52071 , G01S15/8981
摘要： An ultrasonic imaging system for displaying color flow images includes a receiver which demodulates ultrasonic echo signals received by a transducer array and dynamically focuses the baseband echo signals. A color flow processor includes a time domain adaptive wall filter which automatically adjusts to changes in frequency and bandwidth of the wall signal components in the focused baseband echo signals. The mean frequency of the resulting filtered baseband echo signals is used to indicate velocity of flowing reflectors and to control color in the displayed image.
摘要翻译：用于显示彩色流图像的超声波成像系统包括：解调由换能器阵列接收的超声回波信号的接收器，并且动态地聚焦基带回波信号。色流处理器包括时域自适应壁滤波器，其自动调整聚焦基带回波信号中的壁信号分量的频率和带宽的变化。所得滤波的基带回波信号的平均频率用于指示流动反射器的速度并控制所显示的图像中的颜色。

8. 发明授权

US08465431B2 Multi-dimensional CMUT array with integrated beamformation 有权
标题翻译：具有集成波束形成的多维CMUT阵列
公开(公告)号：US08465431B2
公开(公告)日：2013-06-18
申请号：US11788614
申请日：2007-04-20
申请人： Christopher M. W. Daft , D-L Donald Liu , Paul A. Wagner , Igal Ladabaum
发明人： Christopher M. W. Daft , D-L Donald Liu , Paul A. Wagner , Igal Ladabaum
IPC分类号： A61B8/08
CPC分类号： G01S15/8997 , A61B8/12 , A61B8/4472 , A61B8/4483 , A61B8/4488 , A61B8/483 , G01S7/52046 , G01S7/5208 , G01S15/8925 , G01S15/8927 , G01S15/8977 , G10K11/346
摘要： To generate information representing a volume, co-arrays or synthetic transmit aperture process is performed in one dimension and beamforming is performed in another dimension. For example, a transmit aperture focuses in azimuth, but is unfocused or divergent in elevation. A multi-dimensional array receives reflected echoes. The echoes are beamformed for sub-arrays for focus in azimuth. The resulting partial beamformed information is provided to an imaging system from the probe housing for completion of beamforming at least in elevation.
摘要翻译：为了产生表示音量的信息，在一个维度中执行共阵列或合成发射孔径处理，并且在另一维度上执行波束成形。例如，发射光圈聚焦在方位角，但是在高度上没有聚焦或发散。多维阵列接收反射回波。回波被波束形成用于方位角焦点的子阵列。所得到的部分波束形成信息被提供给来自探针外壳的成像系统，用于至少在高度上完成波束形成。

9. 发明授权

US07087023B2 Microfabricated ultrasonic transducers with bias polarity beam profile control and method of operating the same 有权
标题翻译：具有偏置极性光束轮廓控制的微型超声换能器及其操作方法
公开(公告)号：US07087023B2
公开(公告)日：2006-08-08
申请号：US10367106
申请日：2003-02-14
申请人： Christopher M. W. Daft , Paul A. Wagner , Igal Ladabaum
发明人： Christopher M. W. Daft , Paul A. Wagner , Igal Ladabaum
IPC分类号： A61B8/14
CPC分类号： G01S15/8925 , B06B1/0292 , G01S7/52046 , G10K11/341
摘要： A capacitive microfabricated ultrasonic transducer with control of elevation phase through alternating bias polarity is disclosed. Such control of elevation phase results in simple ultrasonic probes with excellent slice thickness attributes. Furthermore, tight spatial variation of phase results in an effective way to achieve transmit aperture and apodization control. Further still, such capacitive microfabricated ultrasonic transducers can achieve elevation focus without the need of a lossy mechanical lens.
摘要翻译：公开了一种通过交替偏置极性控制高程相的电容式微制造超声换能器。这种升高相位的控制导致具有优异切片厚度属性的简单超声波探头。此外，相位的紧密空间变化导致实现传输孔径和变迹控制的有效方式。此外，这种电容微型超声波换能器可以实现仰角，而不需要有损耗的机械透镜。

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