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Pulse elongation and deconvolution filtering for medical ultrasonicimaging

机译:用于医学超声成像的脉冲伸长和去卷积滤波

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Range sidelobe artifacts which are associated with pulsencompression methods can be reduced with a new method composed of pulsenelongation and deconvolution (PED). While pulse compression and PEDnyield similar signal-to-noise ratio (SNR) improvements, PED inherentlynminimizes the range sidelobe artifacts. The deconvolution is implementednas a stabilized inverse filter. With proper selection of the excitationnwaveform an exact inverse filter can be implemented. The excitationnwaveform is optimized in a minimum mean square error (MMSE) sense. Annanalytical expression for the power spectrum of the optimal pulse isnpresented and several techniques to numerically optimize the excitationnpulse are shown. The effects of PED are demonstrated in computernsimulations as well as ultrasonic images
机译:与脉冲压缩方法相关的距离旁瓣伪影可以通过由脉冲伸长和反卷积(PED)组成的新方法来减少。尽管脉冲压缩和PED可以改善信噪比(SNR),但PED固有地最小化了范围旁瓣伪像。去卷积由稳定的逆滤波器实现。通过适当选择激励波形,可以实现精确的逆滤波器。在最小均方误差(MMSE)的意义上优化了激励波形。给出了最佳脉冲功率谱的解析表达式,并给出了几种对激励脉冲进行数值优化的技术。 PED的效果已在计算机仿真和超声图像中得到了证明

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