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    • 2. 发明授权
    • Transmission of optimized pulse waveforms for ultrasonic subharmonic imaging
    • 超声次谐波成像优化脉冲波形传输
    • US06478741B2
    • 2002-11-12
    • US09810048
    • 2001-03-19
    • Richard Yung ChiaoAnne Lindsay Hall
    • Richard Yung ChiaoAnne Lindsay Hall
    • A61B800
    • G01S15/8959G01S7/52038G01S15/8915
    • An optimized pulse waveform is used to excite contrast microbubbles such that the subharmonic signal may be easily isolated for imaging. By reducing the contribution of transmitted fundamental frequency f0 within the subharmonic band, the subharmonic imaging quality is improved. This is accomplished by transmitting an optimized pulse waveform and then filtering the received signal to isolate the subharmonic signal for imaging. The optimized pulse waveform has low spectral energy within a band of frequencies centered at f0/2 and high spectral energy within another band of frequencies centered at f0, where both bands are within the transducer passband. The contrast-generated subharmonic signal is extracted by a receive filter centered at f0/2.
    • 优化的脉冲波形用于激发对比微泡,使得次谐波信号可以容易地隔离成像。 通过减小次谐波带内发射的基频f0的贡献,提高了次谐波成像质量。 这是通过发送优化的脉冲波形然后对接收到的信号进行滤波来隔离成分的次谐波信号来实现的。 优化的脉冲波形在以f0 / 2为中心的频率带内具有低频谱能量,以及以f0为中心的另一频率频带内的高频谱能量,其中两个频带均在换能器通带内。 对比度产生的次谐波信号由以f0 / 2为中心的接收滤波器提取。