| http://www.w3.org/ns/prov#value | - ls; deriving a tissue velocity representative signal from the echo signals of n of the pulses, where n is an integer larger than one; combining the tissue velocity representative signal with the echo signals of more than n of the pulses to remove the tissue velocity components therefrom; and processing the combined echo signals to generate therefrom Doppler flow image data signals. 16.
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