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    • 1. 发明授权
    • Electric circuit for tuning a capacitive electrostatic transducer
    • 用于调谐电容式静电传感器的电路
    • US07670290B2
    • 2010-03-02
    • US10803808
    • 2004-03-17
    • John A. HossackBrett BymasterIgal LadabaumPaul A. WagnerChristopher M. W. Daft
    • John A. HossackBrett BymasterIgal LadabaumPaul A. WagnerChristopher M. W. Daft
    • A61B8/00
    • B06B1/0292A61B8/4483G01S7/52079
    • 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.
    • 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. 发明申请
    • FRONT END CIRCUITRY FOR IMAGING SYSTEMS AND METHODS OF USE
    • 成像系统的前端电路及其使用方法
    • US20100063399A1
    • 2010-03-11
    • US12543452
    • 2009-08-18
    • William F. WalkerMichael I FullerKarthik RanganathanJohn A. HossackTravis N. Blalock
    • William F. WalkerMichael I FullerKarthik RanganathanJohn A. HossackTravis N. Blalock
    • A61B8/00G01N29/36G06K9/00
    • G01N29/0654A61B8/00A61B8/4483G01N2291/02475G01S7/52026G01S7/52046G01S7/52079G01S15/8959
    • Pulse-echo imaging systems and methods are provided, including a transmit code sequencer and a pulse generation circuit, The transmit code sequencer is configured to input a transmit code sequence to the pulse generation circuit. A transducer is configured to receive electrical signals provided as pulses using coded excitation according to the transmit code sequence, and to transduce the electrical signals to pulses of energy other than electrical signals. The transducer is further configured to receive echoes of the pulses of energy other than electrical signals and convert the echoes to received electrical signals generate using coded excitation. A receive circuit is configured to receive the received electrical signals generate using coded excitation, perform analog sampling of the received electrical signals generate using coded excitation, and provide a weighted, summed digital signal by processing the analog samples. At least one example of a pulse imaging system described is configured for ultrasonic pulse-echoes. At least one example of a pulse imaging system described is a medical diagnostic imaging system.
    • 提供脉冲回波成像系统和方法,包括发射码序列器和脉冲发生电路。发送码序列器被配置为向脉冲发生电路输入发射码序列。 传感器被配置为接收根据发射码序列使用编码激励的脉冲提供的电信号,并将电信号转换成电信号以外的能量脉冲。 换能器还被配置为接收除电信号之外的能量脉冲的回波,并将回波转换成使用编码激励产生的接收电信号。 接收电路被配置为接收使用编码激励产生的接收电信号,对使用编码激励产生的接收电信号进行模拟采样,并通过处理模拟采样来提供加权的相加的数字信号。 所描述的脉冲成像系统的至少一个示例被配置用于超声脉冲回波。 所描述的脉冲成像系统的至少一个示例是医学诊断成像系统。
    • 7. 发明申请
    • Hybrid Dual Layer Diagnostic Ultrasound Transducer Array
    • 混合双层诊断超声波传感器阵列
    • US20090048519A1
    • 2009-02-19
    • US11840079
    • 2007-08-16
    • John A. HossackTravis N. BlalockWilliam F. Walker
    • John A. HossackTravis N. BlalockWilliam F. Walker
    • A61B8/00
    • B06B1/0629A61B8/4483A61B8/483G01S15/8913G01S15/8915G10K11/004
    • An ultrasound transducer array having a transmit transducer element comprising a transmit transducer material interposed between a transmit electrode and a reference electrode, wherein voltages applied across the transmit electrode and reference electrode induce an acoustic wave to emanate from the transmit transducer material; and a plurality of receive transducer elements positioned in an array on the transmit transducer element, each of the plurality of the receive transducer elements comprising a receive electrode and a receive transducer material interposed between the receive electrode and the reference electrode, and wherein acoustic waves applied to the plurality of receive transducer elements induces receive voltage signals on the receive electrodes with respect to the reference electrode.
    • 一种具有发射换能器元件的超声换能器阵列,其包括插入在发射电极和参考电极之间的发射换能器材料,其中施加在所述发射电极和参考电极两端的电压引起从所述发射换能器材料发出的声波; 以及多个接收换能器元件,其定位在所述发射换能器元件上的阵列中,所述多个所述接收换能器元件中的每一个包括插入在所述接收电极和所述参考电极之间的接收电极和接收换能器材料,并且其中施加声波 到多个接收换能器元件相对于参考电极在接收电极上感应出接收电压信号。
    • 8. 发明授权
    • Medical diagnostic ultrasound system and method for versatile processing
    • US06511426B1
    • 2003-01-28
    • US09328113
    • 1999-06-08
    • John A. HossackJeffrey S. HastingsJeffrey M. GreenbergSamuel H. Maslak
    • John A. HossackJeffrey S. HastingsJeffrey M. GreenbergSamuel H. Maslak
    • A61B800
    • G01S15/899A61B8/483A61B8/5276G01S7/52034G01S7/52077G01S15/8981G01S15/8993G01S15/8995
    • A method and system for reducing speckle for two and three-dimensional images is disclosed. For two-dimensional imaging, a one and a half or a two-dimensional transducer is used to obtain sequential, parallel or related frames of elevation spaced data. The frames are compounded to derive a two-dimensional image. For three-dimensional imaging, various pluralities of two-dimensional frames of data spaced in elevation are compounded into one plurality of spaced two-dimensional frames of data. The frames of data are then used to derive a three dimensional set of data, such as by interpolation. Alternatively, the various pluralities are used to derive a three-dimensional set of data. An anisotropic filter is applied to the set of data. The anisotropic filter filters at least along the elevation dimension. In either situation, various displays may be generated from the final three-dimensional set of data. A method and system for adjustably generating two and three-dimensional representations is also disclosed. For three-dimensional imaging, at least two sets of three-dimensional data corresponding respectively to two types of Doppler or B-mode data are generated. The sets of data are then combined. An image or a quantity may be obtained from the combined data. By combining after generating the three-dimensional sets of data, the same data (sets of data) may be combined multiple times pursuant to different relationships. Thus, a user may optimize the image or quantity. Likewise, frames of data may be combined pursuant to different persistence parameters, such as different finite impulse response filter size and coefficients. The frames of data may then be re-combined pursuant to different persistence parameters. Original ultrasound data may also be used to re-generate an imaging using the same ultrasound image processes as used for a previous image.