Abstract:The echoes backscattered from blood red cells moving in a vessel are typically elaborated though a spectral analysis and then displayed in the sonogram. The preferred frequency estimator is the Welch method, which is robust and fast, but requires at least 64-128 samples, gathered one per pulse repetition interval (PRIs), to guarantee adequate spectral resolution. The Blood Amplitude and Phase EStimator (BAPES) is an alternative technique that was recently proven suitable for producing good spectrograms using d… Show more
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