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Analysis of different techniques for measuring the attenuation coefficient in ultrasonic phantom

机译:超声波幻像测量衰减系数的不同技术分析

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This work describes some techniques for estimating the attenuation coefficient of longitudinal wave in a phantom made with RTV615 (GE) and silicone. The AWAY method presented results with lower standard deviation when RMS or FFT was applied to analyze the ultrasonic signal. Furthermore, it was observed that the use of APPARENT AWAY method with the FFT has sensitivity to number of cycles of the burst used, because the increased number of cycles considerably reduced the standard deviation of the results. However, if the number of cycles is greater than 10, the application of FFT and RMS methods gave similar results and should provide the same standard deviation.
机译:该工作描述了一些用于估计用RTV615(GE)和硅树脂制成的幽灵中的纵向波振荡系数的一些技术。 当rms或fft被施加以分析超声信号时,远程方法呈现出具有较低标准偏差的结果。 此外,观察到使用表观远离FFT的方法对所用突发的循环数具有敏感性,因为循环数量增加显着降低了结果的标准偏差。 但是,如果周期数大于10,则FFT和RMS方法的应用具有相似的结果,并且应提供相同的标准偏差。

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