Parametric transmit waveform generator for medical ultrasound imaging system
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United States of America Patent
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Dec 30, 2003
Grant Date -
Jul 3, 2003
app pub date -
Jan 6, 2003
filing date -
Oct 17, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A medical diagnostic ultrasonic imaging system includes a transmit waveform generator that uses stored parameters to completely define an arbitrarily complex transmit waveform. Preferably, the stored parameters define an envelope function and a modulation function in a piecewise fashion using a number of sets of quadratic parameters. These quadratic parameters are used to calculate the desired envelope function and modulation function in the log domain, and the envelope and modulation functions are combined in the log domain and then converted to the linear domain. Multiple separate transmit waveforms may be combined in a single channel, and individual channels may be combined prior to application to the transducer elements.
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